Driving shaft of rotary device

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a drive shaft of a rotating device and has a mechanism that prevents vibration of the rotating shaft from being transmitted to the motor side.

【0002】

[Conventional technology]

FIG. 19 is a plan view showing an example of a rotating device currently used in space. In the drawing, four supporting members 91,92,93,94 are attached to a rotating device 90 such as a motor, and the parts are radial. It is growing to. Experimental boxes 80,81,82,83 are attached to the tips of the support members 91 to 94, and experimental objects such as plants are placed in the experimental boxes 80 to 83. In such a device, a low-speed rotation of about 1 rotation / second is given by the rotating device 90 in a weightless state, and an experiment of an object in the experiment boxes 80 to 83 is performed.

【0003】

In the rotating device as described above, the experimental boxes 80 to 83 are attached to the tips of the support members 91 to 94, and the tips have a large shape. In addition, different types of experimental objects for applying gravity are stored in the experimental boxes 80 to 83, and the sizes of the experimental objects are also different. The entire device is arranged symmetrically with respect to the center of the rotation axis, but is stored. The experimental object is unbalanced. Therefore, vibration is generated in the support members 91 to 94 and the experimental boxes 80 to 83 due to the rotation, and when the vibration is generated, the experimental object is changed or adversely affected.

【0004】

[Problems to be Solved by the Invention]

As described above, in the conventional rotating device in space, vibration is generated during rotation, and the arm and the experiment box constituting the rotating body are vibrated, which adversely affects the experimental object. In addition, these vibrations propagate to the surrounding environment via the rotation axis, affect the surrounding space equipment, and affect the control of the equipment, and the like. Therefore, the applicant of the present invention has proposed a rotating device that employs a magnetic bearing for the rotating shaft in order to suppress the vibration of such a rotating device. Next, the outline of the rotating device will be described.

【0005】

FIG. 17 shows a rotating device proposed by the applicant of the present invention, (a) is a side view, (b) is a QQ arrow view in (a), and (c) is an RR sectional view. In the figure (a), reference numeral 10 denotes a casing for accommodating the entire rotating body, and the casing 10 is provided with spaces 10a and 10b above and below. Magnetic bearings 11 and 12 are arranged around the upper and lower spaces 10a and 10b.

【0006】

The magnetic bearings 11 and 12 form a magnetic bearing by arranging excitation coils 1 and 2 around the spaces 10a and 10b, respectively. 3 and 4 are vibration sensors arranged inside the coils 1 and 2 in the spaces 10a and 10b, respectively, and detect the displacement of the gap between the rotating shaft 30 and the rotating shaft 30 as described later, and the rotating shaft is detected from this displacement. 30 vibrations can be detected. As shown in Fig. (C), four vibration sensors 3 and 4 are symmetrically arranged around each other to detect the vibration displacement of the rotating shaft 30 in the ± X and ± Y directions.

【0007】

Reference numeral 30 denotes the above-mentioned rotating shaft, both ends of which are arranged in the spaces 10a and 10b, respectively, connected to the motor 13 in the space 10b, and both ends are pivotally supported by the magnetic bearings 11 and 12. Therefore, the rotating shaft 30 is supported by the space portion by the magnetic force while maintaining a predetermined gap between the coils 1 and 2, and is rotated by the motor 13. As shown in Fig. (B), the circumference of the rotation axis is fixed by four arms 24,25,26,27 in the X and Y axis directions, extends horizontally, and the experimental box 20,21,22 is at the tip. , 23 are installed.

【0008】

In the above-mentioned rotating device, objects to be tested for adding gravity, that is, plants, animals, etc. are placed in the experimental boxes 20 to 23, and the motor 13 is driven to rotate at a low speed in the space environment. Experiments will be conducted to observe the growth of plants and the survival of animals in space. Since experimental objects having different shapes, sizes, and weights are stored in the experimental boxes 20 to 23 in this way, there is a difference in acceleration generated due to the imbalance of weight between the experimental boxes 20 to 23 when rotating. , Vibration occurs between the boxes. This vibration is transmitted through the arms 24 to 27 to vibrate the rotating shaft 30, and this vibration is transmitted from the bearing portion to the casing 10 and propagated to the external environment, which adversely affects the surroundings.

【0009】

In the above-mentioned rotating device, the bearings of the rotating shaft 30 are magnetic bearings 11 and 12, and the rotating shaft 30 is configured to be supported by magnetic force without contacting the support portion of the casing 10. Vibration is detected by four vibration sensors 3 and 4 arranged on the X and Y axes around both ends of the rotating shaft 30. As will be described later, the vibration sensors 3 and 4 detect the fluctuation of the gap due to the vibration between the rotating shaft 30 and the sensor and input it to the control device. When the gap becomes smaller in the control device, this gap is returned to the original gap. The current at the positions of the corresponding coils 1 and 2 is controlled so as to absorb the vibration.

【0010】

As the coils 1 and 2, although not shown, for example, four independent windings of the coil are arranged so that magnetic force acts in four directions of the X-axis and the Y-axis, respectively, and the rotating shaft 30 The displacement is large according to the displacement due to the inclination of, and the excitation of the coil at the place where the fluctuation of the gap with the coil is the largest is controlled, the repulsive force or attractive force with the rotating shaft 30 is adjusted, and the displacement due to vibration is absorbed. The configuration is such that

【0011】

FIG. 18 is a system diagram of the control of the rotating device described above, from the vibration sensors 3a, 3b, 3c, 3d arranged around the upper end of the rotating shaft 30 and the vibration sensors 4a, 4b, 4c, 4d at the lower end. Each detection signal is input to the control device 14. The control device 14 drives the motor 13 and monitors the displacement of each vibration sensor 3 and 4 due to vibration at the end of the rotating shaft in the four directions of the X and Y axes, so that the gap between the sensor and the rotating shaft becomes smaller or larger. Then, the exciting current of the windings of the coils 1 and 2 at the corresponding points on the X and Y axes is controlled, and the repulsive force or attractive force between the rotating shaft 30 and the coil during this period is strengthened to return the gap to the original position. Let me.

【0012】

Reference numeral 15 denotes a storage device, and the pattern of the required value of the amplitude or acceleration with respect to the vibration frequency is stored in advance as data. In the control device 14, the control device 14 monitors the vibration of the rotating shaft 30 from the vibration sensors 3 and 4. Compared to this required value, if the rotating shaft is displaced, the vibration becomes large, and the vibration exceeds the required value, the exciting current of the coil is controlled to absorb the vibration, and the vibration of the rotating shaft 30 is less than the required value. It is constantly controlled so that The storage device 15 can be replaced with a memory. Further, the bearing control device is not connected to the storage device, and can be controlled by data based on the displacement and acceleration of the bearing in the vibration control of the bearing.

【0013】

In the rotating device described above, by supporting both ends of the rotating shaft 30 with magnetic bearings 11 and 12, vibration generated due to the imbalance of mass of the experimental boxes 20 to 23 is suppressed, and the rotating device is transferred to the rotating device. It has become possible to significantly reduce the transmitted vibration. However, even with vibration damping using such magnetic bearings, there is a limit to complete vibration damping for all vibration modes, and vibration transmitted to the motor via the rotating shaft 30 has become a problem. It was. That is, the axial translation of the drive shaft of the motor is allowed only about 1 mm at the maximum, and the gap between the stator and the rotor in the motor is a restraining condition for the translational motion of the rotating shaft.

【0014】

Therefore, the present invention has devised a connection between the motor and the rotating shaft of a rotating device in which both ends of the rotating shaft are supported by magnetic bearings, and adopts a structure that does not transmit arbitrary vibration of the rotating shaft, particularly translational motion, to the motor side. The task was to provide a drive shaft for the device.

【0015】

[Means for solving problems]

The present invention provides the following means for solving the above-mentioned problems.

【0016】

(1) A rotating device having a rotating shaft that is supported by magnetic shafts at both ends in the casing and driven to rotate by a motor, and a plurality of boxes that are attached around the rotating shaft and contain objects to which gravity is applied. In the above, the rotating shaft is a hollow shaft having a cylindrical shape halfway on one side in the axial direction, and a shaft having a diameter smaller than the inner diameter of the hollow shaft is inserted into the hollow shaft at the same core as the hollow shaft. The tip of the rotating device is connected to the rotating shaft in the hollow shaft of the rotating shaft, and the other end is connected to the motor.

【0017】

(2) The tip of the shaft is fixed to the rotating shaft in the hollow shaft of the rotating shaft, and the other end is connected to the motor via a coupler that absorbs vibration (1). The drive shaft of the rotating device according to the description.

【0018】

(3) The drive shaft of the rotating device according to (2), wherein the coupler is provided between the tip of the shaft and the rotating shaft in addition to the coupler on the motor side.

【0019】

(4) A first joint or coupler is connected to one end of the shaft, the first joint or coupler is fixed to the rotating shaft, and a second joint or coupler is attached to the other end of the shaft. The rotation according to (1), wherein a coupler for absorbing vibration is connected between the second joint or coupler and the motor, and the shaft is rotationally driven by the motor. The drive shaft of the device.

【0020】

(5) The rotation according to (4), wherein a coupler that further absorbs vibration is interposed between the first joint or coupler and the rotation shaft, and the coupler is fixed to the rotation shaft. The drive shaft of the device.

【0021】

(6) The drive shaft of the rotating device according to (5), wherein the motor is connected to the second joint or the coupler without a coupler.

【0022】

(7) The driving of the rotating device according to (5), wherein the coupler fixed to the rotating shaft is connected to the second joint or coupler by a shaft without passing through the first joint or coupler. axis.

【0023】

(8) The claim (2), wherein the coupler is configured by connecting both sides of a connecting body facing each other via a vibration absorbing material or a vibration damping material made of an elastic material, a low resilience material or the like. The drive shaft safety device for the rotating device according to any one of () to (7).

【0024】

(9) The coupler is made of an elastic member, a low-resilience material, or the like, in which permanent magnets having different polarities are attached to both sides of a connecting body arranged to face each other at a predetermined interval, and the permanent magnets are connected between the two permanent magnets. The drive shaft of the rotating device according to any one of claims (2) to (7), which is composed of a vibration absorbing material and a vibration damping material.

【0025】

(10) The couplers (2) to (7), wherein the couplers arranged to face each other are connected via an elastic connector in the shape of a cylindrical container in which a gas or a fluid is sealed therein. The drive shaft of the rotating device according to any one of.

【0026】

(11) The tip of the shaft is connected to the rotating shaft via a detachable joint or coupler in the hollow shaft of the rotating shaft, and the other end is connected to the motor. The joint or coupler is formed by the motor. A drive shaft of a rotating device, which is characterized by being separated from the rotating shaft when suddenly stopped.

【0027】

(12) The drive shaft of the rotating device according to (11), wherein the other end of the shaft is connected to the motor via a joint or a coupler that absorbs vibration.

【0028】

(13) A protrusion is provided on the joint or the tip surface of the coupler at the tip of the shaft, and the protrusion is connected by engaging with an engagement groove provided on the rotating shaft side, and the shaft is shafted by an actuator. The drive shaft of the rotating device according to (11) or (12), wherein the joint or coupler is attached to and detached from the rotating shaft by moving the joint or coupler back and forth in the direction.

【0029】

(14) A protrusion is provided on the joint or the tip surface of the coupler at the tip of the shaft, and the protrusion is connected by engaging with an engagement groove provided on the rotating shaft side, and the motor is connected to the casing. The drive shaft of the rotating device according to (11) or (12), wherein the joint or coupler is separated from the rotating shaft by moving the joint or coupler back and forth in the axial direction by an externally mounted actuator.

【0030】

(15) The joint or coupler at the tip of the shaft is provided with a hole provided on the tip surface, a spring provided at the bottom of the hole, and a pin whose one end is urged by the spring and the other end protrudes from the hole. A concave contact groove having a shape substantially the same as the tip shape of the pin is provided on the rotation shaft side, and the pin is urged by a spring to engage with the contact groove to engage with the joint or coupler. The rotating shaft can be rotated integrally, and when the motor suddenly stops, the rotating shaft continues to rotate due to an inertial force, and the pin tip and the contact surface can slide away from each other (the pin tip and the contact surface can be separated from each other). The drive shaft of the rotating device according to 11) or (12).

【0031】

(16) The drive shaft of the rotary device is a device including a rotary drive unit such as an acceleration addition device, various rotation separators, a fan, a compressor, a pump, a robot, etc. used on the ground or in space, an engine, a turbine, a compressor, etc. , The drive shaft of the rotating device according to any one of (1) to (15), which is applied to a bearing of a rotating device such as a motor and constitutes a magnetic bearing vibration damping mechanism.

【0032】

In (1) of the present invention, the shaft is inserted into the hollow shaft in the rotating shaft and fixed to the rotating shaft at the tip of the shaft. Further, since the other end side of the shaft is connected to the motor, the vibration of the rotating shaft is a space around the shaft, and the vibration is blocked in this space, and the vibration transmitted to the motor side can be reduced.

【0033】

In (2) of the present invention, the shaft is inserted into the hollow shaft in the rotating shaft and fixed to the rotating shaft at the tip of the shaft. Further, the other end side of the shaft is connected to the motor via a coupler, and the vibration of the rotating shaft is transmitted to the shaft, but the vibration generated in the shaft is absorbed by the coupler and is not transmitted from the coupler to the motor side. .. Therefore, even if vibration accompanied by translational motion is transmitted from the rotating shaft to the shaft, this translational motion is absorbed as the displacement of the coupler and the displacement is not transmitted to the motor side, so that the problem caused by the translation of the drive shaft of the motor is solved. To.

【0034】

In (3) of the present invention, since the couplers are provided at two locations, the connection portion with the rotating shaft and the motor side, the vibration transmitted from the rotating shaft to the shaft is reliably absorbed by the two couplers. Vibration transmitted to the motor side is reliably blocked, improving reliability.

【0035】

In (4) of the present invention, the rotating shaft and the shaft are connected by a first joint or a coupler, and further connected by a second joint or a coupler. It bends freely, absorbs the tilt between the coupler and the motor, and does not transmit the tilt of the shaft to the drive shaft of the motor. Further, when the rotating shaft performs a translational motion, even if the translation of the rotating shaft is transmitted to the coupler via two joints or a coupler, the translation is absorbed by the displacement of the coupler, and the motor beyond the coupler. It does not affect the drive shaft. By the action of these joints and couplers, the gap fluctuation between the rotor and the stator of the motor is suppressed to a small value, and the reliability of the motor is improved.

【0036】

In (5) of the present invention, a coupler is fixed to the rotating shaft, and a coupler is further added to the configuration of the invention of (4) above. Therefore, the rotational force of the motor is transmitted to the rotating shaft via the coupler, the second joint or coupler, the first joint or coupler, and the additional coupler, and the vibration accompanying the inclination of the rotating shaft is absorbed to some extent by the additional coupler. However, it is absorbed by bending at the first and second joints or couplers, vibrations with translation are absorbed by the additional coupler, and translations not absorbed by this coupler are completely absorbed by the coupler on the motor side. Therefore, the motor is not affected by the vibration caused by the inclination or translation of the rotating shaft.

【0037】

In (6) of the present invention, the coupler on the motor side is removed to form a simplified configuration for connecting the motor to the second joint or coupler, and in (7) of the present invention, the first joint or coupler is used. Although the configuration is simplified by removing it, vibration accompanied by tilting or translation of the rotating shaft can be prevented to some extent even with such a configuration.

【0038】

In (8) of the present invention, the two connecting bodies of the coupler are connected to each other via a vibration absorbing material or a vibration damping material made of an elastic material, a low-resilience material, or the like. Then, the two connecting bodies are a permanent magnet and an elastic member, or a vibration absorbing material or a vibration damping material made of a low-resilience material or the like, and in (10) of the present invention, an elastic connecting body in which a gas or a fluid is sealed. Since each of them is configured, the proper coupler configuration can be selected from these and the drive shaft of the rotating device can be easily realized, and the shaft is tilted or translated to the drive shaft of the motor. Vibration can be reliably blocked.

【0039】

In (11) of the present invention, the rotating shaft and the shaft are connected by a detachable joint or coupler in the hollow shaft. Therefore, if the motor suddenly stops for some reason, a signal of sudden stop of the motor is transmitted. The joint or coupler operates and the joint or coupler disengages from the connection with the rotating shaft and breaks the connection, so that the rotating shaft can rotate freely without being restrained from the shaft. As a result, the rotating body composed of the rotating shaft and the box can continue to rotate due to the inertial force, so that the box is not suddenly stopped from rotating, and sudden impact and vibration are avoided.

【0040】

In the invention of the present invention (12), in the invention of the above (11), since the shaft is further connected to the motor via a joint or a coupler that absorbs vibration, the rotating shaft is not sufficiently vibration-controlled by the magnetic bearing. Even if vibrations accompanied by translation or inclination occur, these vibrations can be absorbed by the coupler on the motor side.

【0041】

In (13) of the present invention, the joint or coupler at the tip of the shaft is provided with a protrusion and engages with the engaging groove on the rotating shaft side to connect, and when the motor suddenly stops, the joint or coupler retracts with the actuator. As a result, the protrusion of the joint or coupler is separated from the engaging groove on the rotating shaft side, and the rotating shaft is freely rotated by inertial force, so that an impact due to a sudden stop of the motor can be avoided.

【0042】

In (14) of the present invention, the joint or coupler at the tip of the shaft is provided with a protrusion, engages with the engaging groove on the rotating shaft side to connect, and when the motor suddenly stops, the motor retracts with an actuator outside the casing. As a result, the shaft also retracts, the protrusion of the joint or coupler and the engaging groove on the rotating shaft side are separated, and the rotating shaft freely rotates due to inertial force, avoiding the impact caused by the sudden stop of the motor. it can.

【0043】

In (15) of the present invention, the rotating shaft and the joint or the coupler are rotated by the pin urged by the spring on the joint or the coupler side engaging with the contact groove on the rotating shaft side. When the motor suddenly stops, the rotating shaft rotates with the pin by inertial force, but since the shaft is stopped, the pin slides in the contact groove of the rotating shaft by this rotational force and resists the urging force of the spring. The wall surface of the contact groove pushes it back into the hole of the joint or coupler and pushes it out of the contact groove, so that the rotation shaft can continue to rotate as it is. As a result, the rotating shaft can continue to rotate by the inertial force by removing the binding force with the joint or the coupler, so that the box does not suddenly stop rotating, and sudden impact and vibration can be avoided.

【0044】

In (16) of the present invention, the drive shaft of the rotating device is an acceleration adding device used on the ground or in space, various rotation separating devices, a device including a rotating drive unit such as a fan, a compressor, a pump, a robot, an engine, and the like. It is used for bearings of rotating equipment such as turbines, compressors, and motors, and constitutes a magnetic bearing vibration damping mechanism, which enables vibration damping of rotating shafts in a wide range of fields.

【0045】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 shows a drive shaft of a rotating device according to the first embodiment of the present invention, (a) is a side view of the inside of the rotating device, and (b) is a sectional view of AA in (a). In the figure, spaces 10a and 10b are formed inside the casing 10, a cylindrical upper fixing member 31 is attached to the space 10a, and the radial direction of the rotating shaft 40 is around the circle of the upper fixing member 31. The magnetic bearing 11 and the vibration sensor 3 that support the above are mounted in the same manner as in the example of FIG. A thrust magnetic bearing 33 that supports the rotating shaft 30 in the thrust direction is also attached.

【0046】

The lower fixing material 32 is installed in the space 10b, and the vibration sensor 4 in which four of them are arranged in the perpendicular direction and the magnetic bearing 12 in the radial direction of the rotating shaft 40 are installed around the inside of the lower fixing material 32. There is. Further, a motor 34 that rotationally drives the rotating shaft 40 is attached to the bottom surface of the space 10b. The motor 34 may be mounted outside the rotating device instead of inside the rotating device. In this case, there is an advantage that the maintenance and inspection of the motor 34 can be facilitated.

【0047】

As described above, both ends of the rotating shaft 40 are supported by magnetic bearings 11 and 12, and the position in the thrust direction is regulated by the thrust magnetic bearing 33, and the gaps at both ends are detected by the vibration sensors 3 and 4, respectively. , As described with reference to FIG. 17, the control device 14 is controlled so as to absorb the vibration of the rotating shaft 40 generated due to the imbalance of the experimental boxes 20 to 23.

【0048】

The rotating shaft 40 is processed into a hollow shape up to the vicinity of the center of gravity of the rotating body, and a shaft 41 having the same shaft core and a diameter smaller than the hollow inner diameter is inserted inside, and the tip of the shaft 41 is the rotating shaft 40. It is fixed near the center of gravity. A coupler 42 is interposed between the shaft 41 and the motor 34. Therefore, the rotation of the motor 34 rotates the shaft 41 via the coupler 42, and since the shaft 41 is coupled to the rotating shaft 40 at the tip, the rotating shaft 40 rotates together with the shaft 41.

【0049】

When the rotating shaft 40 vibrates, the coupler 42 transmits the vibration to the shaft 41, but cuts off the vibration on the way so that the vibration is not transmitted to the motor 34. In particular, when the rotating shaft 40 translates, the shaft 41 also translates, but this translation is blocked by the coupler 42 and does not translate the rotating shaft of the motor 34, resulting in a minute gap between the motor stator and rotor. It does not affect the motor and can prevent the motor from breaking due to the translation of the rotating shaft 40.

【0050】

Next, FIGS. 2 to 4 show application examples of the coupler in the first embodiment of the present invention. FIG. 2 shows an example in which an elastic connecting body is used for the coupler. The connecting body 50 is arranged to face each other between the shafts 41, and a cylindrical shape having an internal space between them is flexible such as plastic and rubber. An elastic connecting body 43 made of a material is interposed, and a gas or a fluid 164 is sealed in the space of the elastic connecting body 43.

【0051】

In such a structure, the displacement of the vibration transmitted from one shaft 41 is elastically absorbed by the space in which the gas or fluid 164 of the elastic connector 43 is sealed, is not transmitted to the other shaft 41, and is not transmitted to the motor 34. There is no communication. In particular, even if the shaft 41 vibrates with translation, the translation is absorbed by the gas or fluid 164 of the elastic connection 43 and is not transmitted to the motor 34.

【0052】

FIG. 3 shows an application example of the coupler, (a) is a side view, (b) is a CC sectional view in (a), and (c) is a DD sectional view in (a). In the figure, in this application example, it is an example in which magnetic coupling is adopted for the coupler. In these figures, permanent magnets 45a and 45b having different polarities are attached to both end faces of the opposing connecting bodies 50, and an elastic ring 46 is interposed between the permanent magnets 45a and 45b. The elastic ring 46 has a cylindrical shape, is made of a flexible material made of plastic or rubber, has a circular flange 46a around the center, and receives permanent magnets 45a and 45b on the upper and lower inner surfaces of the circular flange 46a.

【0053】

In the above coupler, permanent magnets 45a and 45b are arranged alternately on both sides of the coupler 42, and the vibration transmitted from one of the shafts 41 is absorbed by the elastic force of the elastic ring 46, and in particular, the vibration accompanied by translation on the shaft 41. Even if the above occurs, it is absorbed by the deformation of the cylindrical elastic ring 46 and is not transmitted to the motor 34.

【0054】

FIG. 4 shows yet another application example of the coupler, which has a simple structure in which a vibration absorbing material or a damping material made of an elastic material, a low-resilience material, or the like is interposed in the joint or the coupler. In the figure, (a) is a side view, and (b) is an EE sectional view in (a). In the figure, a single elastic body 47 made of a disk-shaped plastic, rubber, or the like is interposed between the opposing connecting bodies 50.

【0055】

Also in the above configuration, the vibration transmitted from one of the shafts 41 is absorbed by the elastic body 47, and in particular, the vibration accompanied by the translational motion is absorbed by the displacement of the elastic body 47 and is prevented from being transmitted to the motor 34 side.

【0056】

FIG. 5 shows a drive shaft of the rotating device according to the second embodiment of the present invention, and is a partial side view of a center of gravity of the rotating shaft. In the figure, in the second embodiment of the present embodiment, in the first embodiment shown in FIG. 1, a coupler 42 is also interposed at the joint portion between the rotating shaft 40 and the shaft 41, and two couplers 42 are interposed in the shaft 41. The configuration is connected to the motor 34, and other configurations are the same as those shown in FIG.

【0057】

In FIG. 5, one connecting body 50 of the coupler 42 is fixed to the joint portion of the shaft 41 near the center of gravity of the rotating shaft 40, and the other is connected to the shaft 41. The configuration of the coupler 42 as shown in FIGS. 2 to 4 is applied. In the second embodiment of the present embodiment, the vibration of the rotating shaft 40 is absorbed by the connecting portion of the coupler 42 as described in FIGS. 2 to 4 above and is not transmitted to the shaft 41, but a large vibration is generated at the center of gravity. When it occurs and is not completely absorbed by the coupler 42 at the center of gravity and is transmitted to the shaft 41, this vibration is absorbed by the coupler 42 on the motor 34 side, so the vibration transmitted to the shaft 41 is two upper and lower. It can be completely absorbed by the coupler 42 and completely prevented from being transmitted to the motor 34 side.

【0058】

FIG. 6 shows a drive shaft of the rotating device according to the third embodiment of the present invention, (a) is a side view of the inside of the rotating device, and (b) is a sectional view of FF in (a). In the figure, spaces 10a and 10b are formed inside the casing 10, a cylindrical upper fixing member 31 is attached to the space 10a, and the radial direction of the rotating shaft 40 is around the circle of the upper fixing member 31. The magnetic bearing 11 and the vibration sensor 3 that support the above are mounted in the same manner as in the example of FIG. A thrust magnetic bearing 33 that supports the rotating shaft 40 in the thrust direction is also attached.

【0059】

The lower fixing material 32 is installed in the space 10b, and the vibration sensor 4 in which four of them are arranged in the perpendicular direction and the magnetic bearing 12 in the radial direction of the rotating shaft 40 are installed around the inside of the lower fixing material 32. There is. Further, a motor 34 that rotationally drives the rotating shaft 40 is attached to the bottom surface of the space 10b. The motor 34 may be mounted outside the rotating device instead of inside the rotating device. In this case, there is an advantage that the maintenance and inspection of the motor 34 can be facilitated.

【0060】

As described above, both ends of the rotating shaft 40 are supported by magnetic bearings 11 and 12, and the position in the thrust direction is regulated by the thrust magnetic bearing 33, and the gaps at both ends are detected by the vibration sensors 3 and 4, respectively. , As described with reference to FIG. 17, the control device 14 is controlled so as to absorb the vibration of the rotating shaft 40 generated due to the imbalance of the experimental boxes 20 to 23.

【0061】

The rotating shaft 40 is processed into a hollow shape up to the vicinity of the center of gravity of the rotating body, and a shaft 41 having the same shaft core and a diameter smaller than the hollow inner diameter is inserted inside, and the tip of the shaft 41 is a universal joint. It is fixed to the vicinity of the center of gravity of the rotating shaft 40 via a deformable joint or a coupler 63a. A joint, a coupler 63b, and a coupler 42 are interposed between the shaft 41 and the motor 34. The coupler 42 is the coupler described with reference to FIGS. 1 to 5. Therefore, the rotation of the motor 34 rotates the shaft 41 via the joint or coupler 63b and the coupler 42, and since the shaft 41 is coupled to the rotating shaft 40 via the joint or coupler 63a at the tip, the rotating shaft together with the shaft 41. 40 rotates.

【0062】

The rotary shaft 40 vibrates and the joints or couplers 63a and 63b flex freely when tilted, and the rotary shaft 40 and the shaft 41 are bent and bent at two connection points, respectively, and the displacement due to the tilt is transmitted to the motor 34. do not.

【0063】

Further, as will be described later, when the rotating shaft 40 vibrates, the coupler 42 transmits the vibration to the shaft 41, but cuts off the vibration in the middle so that the vibration is not transmitted to the motor 34. In particular, when the rotating shaft 40 makes a translational motion, the shaft 41 also propagates through the joints or couplers 63a and 63b and translates in the same manner. However, this translational motion is blocked by the coupler 42 and does not translate the drive shaft of the motor 34. It does not affect the minute gap between the rotor and the rotor, and it is possible to prevent motor failure due to translation of the rotating shaft 40.

【0064】

FIG. 7 is a detailed side view showing the connection between the rotating shaft 40 and the shaft 41 according to the third embodiment. In the figure, the tip of the shaft 41 is connected to the rotating shaft 40 via a joint or a coupler 63a at the central portion of the rotating shaft 40. The shaft 41 is further connected to the motor 34 via a joint, a coupler 63b, and a coupler 42. Therefore, the rotational force of the motor 34 is transmitted to the rotating shaft 40 via the coupler 42, the joint or the couplers 63a and 63b, and rotates the rotating shaft.

【0065】

According to the rotary shaft safety device of the third embodiment described above, the unbalance of the weights of the experimental boxes 20 to 23 causes vibration transmitted to the rotary shaft 40, and when the rotary shaft 40 tries to tilt, the displacement is changed. If the two joints or couplers 63a and 63b bend in any direction to prevent displacement from being transmitted to the shaft 41, and if the rotating shaft 40 attempts to make a translational motion, the coupler 42 will bend the shaft 41 and the motor 34. This displacement is blocked between the two, and the transmission of vibration to the motor 34 is surely prevented, and the failure of the motor 34 is prevented.

【0066】

FIG. 8 is a partial side view of the drive shaft of the rotating device according to the fourth embodiment of the present invention, and in the fourth embodiment of the present invention, a coupler is further added in the third embodiment of the present invention. Other configurations are the same as those of the third embodiment shown in FIG. That is, in FIG. 8, the rotating shaft 40 and the shaft 41 are connected via the coupler 42, and are sequentially connected to the motor 34 via joints, couplers 63a, 63b, and coupler 42.

【0067】

Also in the fourth embodiment of the above embodiment, even if the translational motion of the vibration transmitted from the rotating shaft 40 to the shaft 41 is absorbed by the coupler 42 and further transmitted backward through the joint or the couplers 63a and 63b, the coupler 42 It is completely blocked. Further, even if the rotating shaft 40 is tilted, it bends at two joints or couplers 63a and 63b, and is absorbed by the couplers 42 at both ends, so that vibration is not transmitted to the motor 34.

【0068】

FIG. 9 is a partial side view of the drive shaft of the rotating device according to the fifth embodiment of the present invention. In the fifth embodiment of the present invention, the coupler 42 on the motor 34 side in the fourth embodiment shown in FIG. The configuration is the same as that shown in FIG. 8 except that the configuration is removed. Even in such a configuration, the vibration accompanied by translation generated in the rotating shaft 40 can be blocked by the coupler 42, and the vibration accompanied by inclination can be absorbed by the joint or the couplers 63a and 63b. It is possible to prevent the vibration from being transmitted to the motor 34 side more reliably.

【0069】

FIG. 10 is a partial side view of the drive shaft of the rotating device according to the sixth embodiment of the present invention. In the sixth embodiment of the present invention, the joint or coupler 63a in the configuration of the fourth embodiment shown in FIG. The configuration is such that only one joint or coupler 63b is removed, and the other configurations are the same as in FIG.

【0070】

In the sixth embodiment of the above embodiment, there is one joint or coupler 63b, but when the rotating shaft 40 is displaced by vibration, it is transmitted to the joint or coupler 63b via the coupler 42 at the tip, and the shaft 41 is tilted. Also, since the displacement of the coupler 42 absorbs a certain amount of inclination, it is possible to absorb the fluctuation due to the inclination of the rotating shaft 40 with only one joint or the coupler 63b.

【0071】

FIG. 11 is an explanatory diagram when the rotating shaft 40 absorbs vibration, (a) is an example when the rotating shaft is tilted, and (b) is an example when a translational motion is performed. It is shown as an example of three forms. If the rotating shaft 40 is tilted in (a) and the joint or coupler 63a moves from the initial position of 63a'to 63a, the shaft 41 bends at the joint 63a at one end and the joint or coupler 63b is initially at the other end. It bends at the position of, does not move to the position of the fluctuating position 63b'due to inclination, has almost no effect on the coupler 42, and is not affected by vibration on the motor connected to the coupler 42.

【0072】

In (b), assuming that the rotating shaft 40 is translated by ΔL, the shaft 41 is not bent at the joint or the couplers 63a and 63b, and is translated as it is from the initial position of 63a', 63b', the joint of the coupler 42 One of them fluctuates and moves together with the shaft 41, does not give fluctuation to the motor side of the coupler 42, and absorbs the fluctuation in the coupler 42. Similarly, in the other embodiment, the form of fluctuation between the rotating shaft 40 and the shaft 41, the vibration is absorbed by the joint or the combination of the coupler and the coupler, and similarly, the vibration is not affected on the motor side. Therefore, the description thereof will be omitted.

【0073】

In the third to sixth embodiments described above, the coupler having the structure shown in FIGS. 1 to 5 is used as the coupler 42 between the rotating shaft 40 and the shaft 41, and the coupler between the shaft 41 and the motor 34. By using it as 42, the vibration transmitted from the rotating shaft 40 can be effectively cut off.

【0074】

The rotating devices in the third to sixth embodiments described above have been described with the example of the rotating devices of the four experimental boxes 20 to 23, but the present invention is not limited to the four experimental boxes and a plurality of rotating devices. For example, it can be applied to a rotating device having any number of experimental boxes, such as a rotating device having eight experimental boxes.

【0075】

FIG. 12 shows a drive shaft of the rotating device according to the seventh embodiment of the present invention, (a) is an internal side view, and (b) is an HH sectional view in (a). In FIG. 12, spaces 10a and 10b are formed in the casing 10, a cylindrical upper fixing member 31 is attached to the space 10a, and a rotation shaft 40 is radially mounted on the inner wall of the upper fixing member 31. A magnetic bearing 11 that supports the rotating shaft 40 in a non-contact manner, a vibration sensor 3 that detects displacement of the rotating shaft 40 due to vibration, and a thrust magnetic bearing 33 that supports the rotating shaft 40 in the thrust direction are attached.

【0076】

A circular lower fixing member 32 is also attached to the space 10b, and a motor 34 that rotates the rotating shaft 40, a vibration sensor 4 that detects the displacement of the vibration of the rotating shaft 40, and a magnetic bearing 12 in the radial direction are attached to the inner wall thereof. However, each is attached.

【0077】

The rotating shaft 40 is supported by the magnetic bearings 11, 12, 33 described above in a non-contact manner with respect to the surroundings, and is rotationally driven by the motor 34. As described in FIG. 17, one end of four arms 24 to 27 is attached to the central portion of the rotating shaft 40, and the experimental boxes 20 to 23 are supported at the other end by extending radially, and these arms and the experimental box are supported. Is integrally fixed and is configured to rotate together with the rotating shaft 40 by driving the motor 34.

【0078】

One side of the rotating shaft 40 forms a cylindrical hollow shaft from one end to the central portion, a shaft 41 is inserted through the central portion, and the tip of the shaft 41 is connected to a joint or a coupler 64. The outer diameter of the shaft 41 is slightly smaller than the inner diameter of the hollow shaft portion of the rotating shaft 40, and the shaft 41 is inserted along the axis of the hollow shaft. The joint or coupler 64 is detachably engaged with the rotating shaft 40 in the hollow shaft of the rotating shaft 40 as described later, and when the rotation of the motor 34 suddenly stops, the joint or the coupler 64 engages with the rotating shaft 40. It is separated by the coupler 64, and the rotating body consisting of the rotating shaft 40, the arms 24 to 27, and the experimental boxes 20 to 23 is released from the motor 34.

【0079】

A coupler 42 is coupled to the other end of the shaft 41 outside the hollow shaft portion. As described above in FIGS. 2 to 5, the coupler 42 is connected to the drive shaft on the motor 34 side with elastic force, and the rotation of the motor 34 rotates the shaft 41 via the coupler 42, and the shaft 41 Since it is connected to the rotating shaft 40 via a joint or a coupler 64 at the tip, the rotating shaft 40 rotates together with the shaft 41.

【0080】

When the rotating shaft 40 vibrates, the coupler 42 transmits the vibration to the shaft 41, but cuts off the vibration on the way so that the vibration is not transmitted to the motor 34. In particular, when the rotating shaft 40 translates or swings, the shaft 41 also translates or swings, but this vibration is blocked by the coupler 42 and does not vibrate the rotating shaft of the motor 34, so that the motor stator and rotor It does not affect the minute gap between them, and it is possible to prevent the motor from breaking down due to the vibration of the rotating shaft 40.

【0081】

13A and 13B are enlarged detailed views of the joint or coupler 64 in the seventh embodiment, FIG. 13A is a side view of the joint or coupler joint, and FIG. 13B is a sectional view taken along line JJ in FIG. Further, (c) is a side view when the joint or coupler is detached, and (d) is a cross-sectional view of KK in (c). In (a) and (b), the rotating shaft 40 and the joint or the coupler 64 are shown to be engaged with each other. An actuator 66 is attached to the tip of the shaft 41, and the rod 66a extends to the joint or the coupler 64. It is pushing up the coupler 64. A cross-shaped protrusion 66b is formed on the upper surface of the joint or the coupler 64, while the cross-shaped protrusion is inserted on the rotation shaft 40 side, and an engaging groove 65 is formed to engage with the cross-shaped protrusion. ing. Further, a rail-shaped guide 67 is formed on the rod 66a, and a guide groove 66c is formed on the actuator 66 side by engaging with the guide 67 to slidably expand and contract the guide 67.

【0082】

In the above configuration, when rotating the rotating shaft 40, the rod 66a of the actuator 66 is extended, the joint or coupler 64 is pushed up, and the cross-shaped protrusion 66b of the joint or coupler 64 is engaged with the engaging groove on the rotating shaft 40 side. When engaged with 65, the rotation of the shaft 41 is mutually constrained by the engaging groove 65 and the protrusion 66b, and the guide 67 and the guide groove 66c, and is transmitted to the rotating shaft 40 via the actuator 66, the joint or the coupler 64. Will be done.

【0083】

(c) and (d) are states in which the joint or coupler 64 is separated from the rotation shaft 40, and when the rod 66a of the actuator 66 is contracted, the joint or coupler 64 moves downward, and the protrusion on the joint or coupler 64 side. 66b is disengaged from the engaging groove 65 on the rotating shaft 40 side, and the rotating shaft 40 is separated from the shaft 41 side and becomes free. In this state, when the motor 34 suddenly stops, the stop is detected on the motor side and is not shown, but it is transmitted from the motor side to the actuator 66 by the electric wire in the shaft 41, and the actuator 66 operates to form the shaft 41. The rotating shaft 40 is separated from the rotating shaft 40 to free the rotating body, and the rotating body is freely moved to stop naturally, and the impact of the rotating body due to the sudden stop of the motor 34 can be avoided. The electric wire for controlling the actuator 66 is connected to the electric wire in the shaft 41 by a slip ring or the like on the motor 34 side.

【0084】

FIG. 14 shows a drive shaft of the rotating device according to the eighth embodiment of the present invention, (a) is a side view showing a state in which the joint or coupler is connected to the rotating shaft, and (b) is a side view showing a detached state, (c). ) Is a cross-sectional view of the LL in (b). In (a), the configuration of the joint or coupler 64 is the same as that shown in FIG. 13, a cross-shaped protrusion 66b is formed on the upper surface of the joint or coupler 64, and an engaging groove 65 is provided on the rotating shaft 40 side. The protrusion 66b is formed, engages in the engaging groove 65, and transmits the rotational force on the shaft 41 side to the rotating shaft 40.

【0085】

In the eighth embodiment of the present embodiment, the actuator 70 is attached to the outside of the casing 10, the rod 70a is inserted through the hole 69 provided in the casing 10, and the tip of the rod 70a is connected to the bottom surface of the motor 34. There is. The motor 34 is supported from both sides by support brackets 68 that can move up and down in the casing 10, and the motor 34 is moved up and down when the rod 70a of the actuator 70 expands and contracts.

【0086】

In (a) above, in the motor 34, the rod 70a of the actuator 70 is extended and moved upward, and the drive shaft of the motor 34, the coupler 42, the shaft 41, the joint at the tip thereof, or the coupler 64 is also pushed upward. The protrusion 66b of the joint or coupler 64 enters the engaging groove 65 on the rotation shaft 40 side, the joint or coupler 64 and the rotation shaft 40 are connected, and the rotational force on the shaft 41 side is transmitted to the rotation shaft 40.

【0087】

In (b) and (c), when the rod 70a of the actuator 70 contracts and the motor 34 is lowered, the coupler 42, the shaft 41, the joint or the coupler 64 connected to the motor 34 are also lowered. When the joint or coupler 64 is lowered, the protrusion 66b at the upper end of the joint or coupler 64 is separated from the engaging groove 65 of the rotating shaft 40, and the rotating shaft 40 is in a free state. In this state, when the motor 34 suddenly stops for some reason, the drive signal of the motor 34 is detected and the actuator 70 is driven to lower the position of the motor 34, and the rotating shaft 40 is separated from the shaft 41 side and is free. In this state, the rotating body can be naturally stopped by free movement, and the impact of the rotating body due to the sudden stop of the motor 34 can be avoided.

【0088】

FIG. 15 shows the drive shaft of the rotating device according to the ninth embodiment of the present invention, (a) is a side view, (b) is a sectional view of MM in (a), and (c) is an NN sectional view of (b). The figure, (d) is the PP sectional view of (b). In (a) and (b), a joint or a coupler 64 is attached to the tip of the shaft 41, and the joint or the coupler 64 is provided with two engaging holes 74. As shown in c) and (d), a spring 73 is attached to the bottom surface of the hole, and the spring is urged to insert two pins 71 so as to project to the upper surface. Although the engaging holes 74 and the pins 71 are shown in the example of two, a minimum of two may be sufficient, and two or more may be used.

【0089】

During normal rotation, the pin 71 is urged by the spring force of the spring 73 and protrudes to the upper surface and enters the inclined engaging hole 74 of the rotating shaft 40, and the pin 71 engages as shown in (c) and (d). The rotational force is transmitted to the rotating shaft 40 by pressing the vertical surface of the joint hole 74. The pin 71 has an inclined surface 71a at the upper end, and the protruding portion of the pin 71 abuts on the vertical surface 73a of the engaging hole 74 of the rotating shaft 40 to transmit the rotational force.

【0090】

FIG. 16 is a diagram showing the operation of the drive shaft according to the ninth embodiment described above. In (a) to (d), when the motor 34 suddenly stops, the pin 71 automatically sets the rotating shaft 40. The states in which the rotating shaft 40 is separated from the engaging hole and the rotating shaft 40 is free from the shaft 41 side and freely rotates are shown in order.

【0091】

In the state (a), the pin 71 is urged by the spring force of the spring 73 to enter the inclined engaging hole 74 of the rotating shaft 40, and the joint or coupler 64 connected to the shaft 41 rotates in the direction of the arrow in the figure. The state in which the rotational force is transmitted to the rotating shaft 40 is shown. (b) indicates a state in which the motor 34 is suddenly stopped. In this state, the rotating shaft 40 still continues to rotate due to the inertial force, while the pin 71 is suddenly stopped, so that the engaging hole 74 of the rotating shaft 40 Since the inclined surface 74b is in contact with the inclined surface 71a of the pin 71 and is inclined with each other, the inclined surface 74b slides, and the inclined surface 74b of the engaging hole 74 pushes down the pin 71 against the elastic force of the spring 73 and continues the rotation.

【0092】

In (c), the rotating shaft 40 continues to rotate, further pushing down the inclined surface 71a of the pin 71, the pin 71 further pushing the spring 73, completely pushing down from the upper surface of the joint or the coupler 64, and further rotating the rotating shaft 40. Make it easier. In (d), the rotating shaft 40 further rotates in the direction of the arrow, and the pin 71 is completely pushed down into the engaging hole 72 of the joint or coupler 64 to continue rotating. Therefore, even if the motor 34 suddenly stops, the rotating shaft 40 continues to rotate. Can continue to rotate freely and avoid the impact caused by a sudden stop.

【0093】

The drive shaft of the rotary device of the present invention includes a device including a rotary drive unit such as an acceleration addition device, various rotation separators, a fan, a compressor, a pump, a robot, etc. used on the ground or in space, an engine, a turbine, and the like. By using it as a bearing for rotating equipment such as a compressor and a motor and driving it rotationally, it is possible to minimize the vibration generated by these rotating bodies.

【0094】

[Effect of the invention]

The drive shaft of the rotary device of the present invention is (1) a plurality of rotary shafts in which both ends are supported by magnetic shafts in the casing and rotationally driven by a motor, and an object attached around the rotary shaft to add gravity. In the rotating device having the box, the rotating shaft has a hollow shaft having a cylindrical shape on one side in the axial direction halfway, and the inside of the hollow shaft is concentric with the hollow shaft from the inner diameter of the hollow shaft. A shaft having a small diameter is inserted, and the tip of the shaft is connected to the rotating shaft in the hollow shaft of the rotating shaft, and the other end is connected to the motor. With such a structure, the vibration of the rotating shaft is a space around the shaft, and the vibration is blocked in this space, and the vibration transmitted to the motor side can be reduced.

【0095】

In (2) of the present invention, the tip of the shaft is fixed to the rotating shaft in the hollow shaft of the rotating shaft, and the other end is connected to the motor via a coupler that absorbs vibration. The vibration of the shaft is transmitted to the shaft, but the vibration generated in the shaft is absorbed by the coupler and is not transmitted from the coupler to the motor side. Therefore, even if vibration accompanied by translational motion is transmitted from the rotating shaft to the shaft, this translational motion is absorbed as the displacement of the coupler and the displacement is not transmitted to the motor side, so that the problem caused by the translation of the drive shaft of the motor is solved. To.

【0096】

In (3) of the present invention, since the couplers are provided at two locations, the connection portion with the rotating shaft and the motor side, the vibration transmitted from the rotating shaft to the shaft is reliably absorbed by the two couplers. Vibration to the motor side is reliably blocked, improving reliability.

【0097】

In (4) of the present invention, a first joint or coupler is connected to one end of the shaft, the first joint or coupler is fixed to the rotating shaft, and the other of the shaft is second. A joint or coupler is connected, and a coupler that absorbs vibration is connected between the second joint or coupler and the motor. Therefore, when the rotation axis is tilted, both joints or couplers flex freely. , Absorbs the tilt between the coupler and the motor, and does not transmit the tilt of the shaft to the drive shaft of the motor. Further, when the rotating shaft performs a translational motion, even if the translation of the rotating shaft is transmitted to the coupler via two joints or a coupler, the translation is absorbed by the displacement of the coupler, and the motor beyond the coupler. It does not affect the drive shaft. By the action of these joints, couplers, and couplers, the gap fluctuation between the rotor and the stator of the motor is suppressed to a small value, and the reliability of the motor is improved.

【0098】

In (5) of the present invention, a coupler is fixed to the rotating shaft, and a coupler is further added to the configuration of the invention of (4) above. Therefore, the rotational force of the motor is transmitted to the rotating shaft via the coupler, the second joint or coupler, the first joint or coupler, and the additional coupler, and the vibration accompanying the inclination of the rotating shaft is absorbed to some extent by the additional coupler. However, it is absorbed by bending at the first and second joints or couplers, vibrations with translation are absorbed by the additional coupler, and translations not absorbed by this coupler are completely absorbed by the coupler on the motor side. Therefore, the motor is not affected by the vibration caused by the inclination or translation of the rotating shaft.

【0099】

In (6) of the present invention, the coupler on the motor side is removed to form a simplified configuration for connecting the motor to the second joint or coupler, and in (7) of the present invention, the first joint or coupler is used. Although the configuration is simplified by removing it, vibration accompanied by tilting or translation of the rotating shaft can be prevented to some extent even with such a configuration.

【0100】

In (8) of the present invention, the two connecting bodies of the coupler are connected to each other via a vibration absorbing material or a vibration damping material made of an elastic material, a low-resilience material, or the like. Then, the two connecting bodies are a permanent magnet and an elastic member, or a vibration absorbing material or a vibration damping material made of a low-resilience material or the like, and in (10) of the present invention, an elastic connecting body in which a gas or a fluid is sealed. Since each of them is configured, the proper coupler configuration can be selected from these and the drive shaft of the rotating device can be easily realized, and the shaft is tilted or translated to the drive shaft of the motor. Vibration can be reliably blocked.

【0101】

In (11) of the present invention, the tip of the shaft is connected to the rotating shaft via a detachable joint or coupler in the hollow shaft of the rotating shaft, and the other end is connected to the motor. When one motor suddenly stops for some reason, the joint or coupler operates by the signal of the sudden stop of the motor, the joint or coupler disconnects from the rotating shaft and breaks the connection, and the rotating shaft is not restrained from the shaft. You will be able to rotate freely. As a result, the rotating body composed of the rotating shaft and the box can continue to rotate due to the inertial force, so that the box is not suddenly stopped from rotating, and sudden impact and vibration are avoided.

【0102】

In the invention of the present invention (12), in the invention of the above (11), since the shaft is further connected to the motor via a joint or a coupler that absorbs vibration, the rotating shaft is not sufficiently vibration-controlled by the magnetic bearing. Even if vibrations accompanied by translation or inclination occur, these vibrations can be absorbed by the joint or coupler on the motor side.

【0103】

In (13) of the present invention, the joint or coupler at the tip of the shaft is provided with a protrusion and engages with the engaging groove on the rotating shaft side to connect, and when the motor suddenly stops, the shaft retracts with an actuator to form a joint. Alternatively, the protrusion of the coupler and the engaging groove on the rotating shaft side are separated from each other, and the rotating shaft freely rotates by inertial force, so that an impact due to a sudden stop of the motor can be avoided.

【0104】

In (14) of the present invention, the joint or coupler at the tip of the shaft is provided with a protrusion, engages with the engaging groove on the rotating shaft side to connect, and when the motor suddenly stops, the motor retracts with an actuator outside the casing. As a result, the shaft also retracts, the protrusion of the joint or coupler and the engaging groove on the rotating shaft side are separated, and the rotating shaft freely rotates due to inertial force, avoiding the impact caused by the sudden stop of the motor. it can.

【0105】

In (15) of the present invention, the rotating shaft and the joint or the coupler are rotated by the pin urged by the spring on the joint or the coupler side engaging with the contact groove on the rotating shaft side. When the motor suddenly stops, the rotating shaft rotates with the pin by inertial force, but since the shaft is stopped, the pin slides in the contact groove of the rotating shaft by this rotational force and resists the urging force of the spring. The wall surface of the contact groove pushes it back into the hole of the joint or coupler and pushes it out of the contact groove, so that the rotation shaft can continue to rotate as it is. As a result, the rotating shaft can continue to rotate by removing the binding force with the joint or the coupler, so that the box does not suddenly stop rotating, and sudden impact and vibration can be avoided.

【0106】

In (16) of the present invention, the drive shaft of the rotating device is an acceleration adding device used on the ground or in space, various rotation separating devices, a device including a rotating drive unit such as a fan, a compressor, a pump, a robot, an engine, and the like. It is used for bearings of rotating equipment such as turbines, compressors, and motors, and constitutes a magnetic bearing vibration damping mechanism, which enables vibration damping of rotating shafts in a wide range of fields.

[Simple explanation of drawings]

[Figure 1]

The drive shaft of the rotating apparatus according to the first embodiment of the present invention is shown, (a) is a side view of the inside of the apparatus, and (b) is a sectional view of AA in (a).

[Figure 2]

A coupler according to the first embodiment of the present invention is shown, (a) is a side view, and (b) is a BB sectional view in (a).

[Fig. 3]

An application example of the coupler according to the first embodiment of the present invention is shown, (a) is a side view, (b) is a CC sectional view in (a), and (c) is a DD sectional view in (a).

[Fig. 4]

Other application examples of the coupler according to the first embodiment of the present invention are shown, (a) is a side view, and (b) is an EE sectional view in (a).

[Fig. 5]

It is a partial side view which shows the drive shaft of the rotating apparatus which concerns on 2nd Embodiment of this invention.

[Fig. 6]

A drive shaft of a rotating device according to a third embodiment of the present invention is shown, (a) is a side view of the inside of the device, and (b) is a sectional view of FF in (a).

[Fig. 7]

It is a side view which shows the connection part of the rotary shaft and a joint or a coupler which concerns on 3rd Embodiment of this invention.

[Fig. 8]

It is a side view which shows the connection part of the rotating shaft and a shaft which concerns on 4th Embodiment of this invention.

[Fig. 9]

It is a side view which shows the connection part of the rotating shaft and the shaft which concerns on 5th Embodiment of this invention.

[Fig. 10]

It is a side view which shows the connection part of the rotating shaft and the shaft which concerns on 6th Embodiment of this invention.

[Fig. 11]

In the figure explaining the operation of the drive shaft of the rotating apparatus which concerns on 3rd Embodiment of this invention, (a) shows the state at the time of tilting of a rotating shaft, and (b) shows the state at the time of translational movement.

[Fig. 12]

A drive shaft of a rotating device according to a seventh embodiment of the present invention is shown, (a) is an internal side view, and (b) is an HH sectional view in (a).

[Fig. 13]

The drive shaft according to the seventh embodiment of the present invention is shown, (a) is a side view of a state in which a joint or a coupler and a rotating shaft are connected, (b) is a JJ sectional view in (a), and (c) is a detachment. A side view of this state, (d) is a cross-sectional view of KK in (c).

[Fig. 14]

The drive shaft of the rotating apparatus according to the eighth embodiment of the present invention is shown, (a) is a side view in a state where the joint or coupler and the rotating shaft are connected, (b) is a side view in a detached state, and (c). Is the LL sectional view in (b).

[Fig. 15]

The drive shaft of the rotating device according to the ninth embodiment of the present invention is shown, (a) is a side view, (b) is a cross-sectional view of MM in (a), (c) is a cross-sectional view of NN in (b), ( d) is a cross-sectional view of PP in (a).

[Fig. 16]

The detached state of the safety device according to the ninth embodiment of the present invention is shown, and (a), (b), (c), and (d) are diagrams showing the action of the pin detaching and the rotating shaft rotating. is there.

[Fig. 17]

A rotating device according to the prior art of the present invention is shown, (a) is an internal side view, (b) is a QQ arrow view in (a), and (c) is an RR sectional view in (a).

[Fig. 18]

It is a control system diagram of the rotating apparatus shown in FIG.

[Fig. 19]

It is a top view of a rotary experimental device in space.

[Explanation of symbols]

10 casing 11,12 Magnetic bearing 31 Upper fixing material 32 Lower fixing material 34 motor 40 axis of rotation 41 shaft 42 coupler 43 Elastic connector 45a, 45b Permanent magnet 46 elastic ring 47 Elastic body 50 connections 63a, 63b joint or coupler 64 joints or couplers 65 Engagement groove 66,70 actuator 66a, 70a rod 66b protrusion 68 Support Bracket 69 holes 71 pin 71a, 74b Inclined surface 72,74 Engagement holes 73 Spring 73a Vertical plane 164 gas or fluid