Device for feeding fluid for the spraying of picks in a shearing drum

(42) Date of commencement of the patent: 15. 2.1991 (45) Date of issue: 25. 9.1991

<td>(56) Documents:</td><td>(73) Patent owner:</td>

<td>DE-OS 3631202 EP-PS0180573</td><td>VOEST-ALPIfC MASCHINENBAU SOCIETY MBH A-4020 LINZ, UPPER AUSTRIA (AT).</td>

<td></td><td>(72) Inventor:</td>

<td></td><td>EBNER BERNHARD DIPL.ING. KNITTELFELD, STEIERMARK (AT). KRASSNITZER OTTO ING. ZELTWEG, STEIERMARK (AT). SCHÖFFMANN FRANZ DIPL.ING. ZELTWEG, STEIERMARK (AT). ZITZ ALFRED ING. ZELTWEG, STEIERMARK (AT).</td>

(54) DEVICE FOR DELIVERING FLUID FOR THE SUPERVISION OF CHISELS IN A CUTTING ROLLER (57) In a device for supplying fluid, in particular cooling water for the spraying of chisels, into the interior of a cutting roller (5), whose rotary drive has at least one gear reduction stage in the interior of the hollow cutting roller, the fluid lines (46) are guided into the axial area of ​​the cutting roller (5) via a component (22) which is stationary and rigidly connected to the carrier (3) of the cutting roller (5), wherein the gear is arranged concentrically to the axis and at least one axial fluid line (46) is guided to at least one lateral end face and opens into at least one distributor.

CD

<img file="AT393296B_D0001.tif" />

AT 393,296

MB 0073313

AT393 296B

The invention relates to a device for supplying fluid, in particular cooling water for the spraying of chisels, in the interior of a cutting roller whose rotary drive has at least one gear reduction stage in the interior of the hollow cutting roller

For the so-called internal spraying of chisels is in connection with rotating mounted cutting heads, which, in contrast to cutting rollers, are characterized by a considerably shorter construction in the axial direction and, unlike cutting rollers, can be mounted close to their axis of rotation, already known, in cases, in which reduction gear or stages of such a reduction gear are arranged in the hollow cutting head itself, to carry out the water supply via axial channels, as this, for example, EP-PS 180 573 can be removed. In a modified embodiment of cutting heads according to DE-OS 36 31 202, it is provided that in the interior of the cutting head provided annular spaces are acted upon in directly adjacent to the boom arm Breich of the cutting head via rotary unions with hydraulic fluid.

In Schrämwalzen takes place over the axial length of the roller usually at several points a storage, the storage is usually done on a larger diameter and close to the shell of the roll It is known to form such Schrämwalzen hollow, and it is further known within such Schrämwalzen stages of a reduction gear to be able to keep the diameter of the drive shafts smaller. In most drive designs, however, there is no possibility of an axial supply of fluid and therefore it is not readily possible for Schrämwalzen a spraying of the chisel even about arranged in the interior of the cutting roller supply lines.

In cutting rollers, it is also known to extend lateral areas of the cutting rollers by hydraulically driven, extendable components in the axial direction, so that there is a roll broadening. For the hydraulic drive of such Schrämwalzenverbreiterungen fluid medium must also be supplied and since the drives of such Walzenverbreiterungen be offset with the cutting roller in rotation, rotary feedthroughs for the supply of fluid are required. If, as is common in known drive devices, a continuous shaft is used as the transmission output shaft use, the rotary feedthrough always be made only outside the axial range and thus on a larger radius, resulting in sealing problems.

The invention now relates to a device of the type mentioned above and aims at in an arrangement, in which at least one gear reduction stage is arranged in the interior of the hollow cutting roller to simplify the seal for fluid supply lines and to provide an internal spray, with which also between the bearing points of a cutting roller remaining central areas of a cutting roller can be acted upon with fluid for spraying chisels, without this an excessive sealing effort is required. To achieve this object, the device according to the invention essentially consists in that the fluid lines are guided via a stationary and rigidly connected to the carrier of the cutting roller component in the axial region of the cutting roller, that the gear is arranged concentrically to the axis and that at least one axial fluid line is guided to at least one lateral end face and opens into at least one distributor in order to provide the possibility of an axial passage of the fluid lines, hiebei a gear design is assumed as they were in principle already used in cutting heads. Such transmission designs provide a rigid support for idler gears, allowing simple fluid delivery via such a rigid support. In a single-stage reduction of the output takes place in such Zwischenrädergetrieben with rigid support of the intermediate wheels on the ring gear of the transmission, in a simple way, such intermediate gears with rigid carrier of the intermediate gears can be combined with downstream planetary gears, which still allow an axial passage of the fluid lines , Essential for the safe and simple sealing is hiebei, that the fluid lines are guided via a stationary and rigidly connected to the carrier of the cutting roller component in the axial region of the cutting roller, and that at least one axial fluid conduit is led to at least one lateral face and terminates in at least one manifold. The array of manifolds in or on the face of such a roller facilitates accessibility of the seals and such seals are only peripherally rigidly connected to the rigid member axial fluid line required. Since such fluid lines must have only small diameter, a secure seal can be achieved here easily. Starting from such manifolds, fluid can then be channeled, for example, to the jetting nozzles or to other assemblies, such as drive units for roughing mill crushers, where the further channels can be readily arranged in components which co-rotate with the roller. However, the distributor near the lateral end face can also be equipped as a device for intermittent spraying in a manner known in cutting heads, wherein the distributor can intermittently interrupt the fluid flow for the purpose of obtaining fluid pulses at the nozzles, and it is further readily possible to provide a so-called sector control. with which it is to be ensured that only the parts of the cutting roller facing the working face are supplied with fluid. For chisel cooling, it is known to use as the fluid water or water-air mixtures, with any media, such as those used for chisel cooling or dust control, can also be used in the present case. A structurally simple embodiment of a transmission which has such an axial passage in the interior of a hollow cutting roller

-2AT393 296B is shown below.

Advantageously, the inventive construction is made such that the axial fluid line has at least two separate channels. A stationary and rigidly connected to the carrier of the cutting roller fluid line can be connected to the difference of rotating lines without significant sealing problems with the rigid component and it can by the measure that a plurality of such channels is provided, also a differentiated control of individual units inside the Cutting roller and a differentiated control of the spraying be set from the outside.

About such a rotationally fixed to the rigid part connected axial fluid conduit having a plurality of channels, Even complicated manifolds without significant sealing problems can be connected near the end faces of the cutting roller. and it is the education so taken advantage of that a distributor for the fluid is arranged in a manner known per se close to the lateral end faces and that at least one distributor with the middle, between carrier-arranged regions of the roller co-rotating lines are connected to nozzles in these areas of the roller. In particular, via such co-rotating with the roller lines a simple feeding of central areas of the roller is possible, so that even the remaining between the bearings middle region of a roller can be equipped with a Innenbedüsung in a simple manner. In the distributor contained wear parts can be made easily accessible due to the arrangement near the end faces of the roller for maintenance and it can od in the inventive arrangement also by simple exchange of slotted discs. like. changed the respectively desired pulse frequency for a pulse control.

Different functions can also be controlled by means of multi-channel axial fluid lines and it is advantageous if the design is such that nozzles are connected to the axial fluid lines with chisels and / or control drives for roller extensions. In principle, different media can be transported in the individual channels of the fluid lines, but the drive for roller extensions can also be readily controlled with the same fluid used for spraying the bits.

A particularly advantageous embodiment of such a rigid equipped with separate channels fluid line can be realized in that the fluid line is designed as a multi-walled tube which is rigidly connected to the stationary component and their separate rooms are connected to separate leads or leads. The feeding of such designed as a multi-walled pipe fluid line is still in the stationary fixed or stationary part and therefore there are no sealing problems in this feed, as they would occur at relatively rotating parts. The distributor itself can, as already mentioned, be designed in a manner known per se as a sector or impulse control, wherein a suitable for Schrämköpfe impulse control and a corresponding sector control for cutting heads, for example, the earlier application A1097 / 88 can be removed. Such sector controls are particularly suitable for high pressures and thus high pulse pressure peaks.

In principle, it is possible in the formation of the fluid line with two channels to switch them so that the pressure line for the supply of fluid to the nozzles connected to the working space of a cylinder-piston unit for the operation of a Schrämwalzenverbreiterung and that of this working space opposite cylinder chamber with a connected separate derivation. In this way, whenever the spraying of the bit is activated, at the same time fluid under pressure supplied to the drive for the Schiämwalzenverbreiterung so that simultaneously with the spraying a lateral extension movement is initiated. The second channel of the fluid line is in this case required to retract the roller broadening for the procedure of the cutting machine, and it must be connected for this purpose only connected to the second Zylindenaum derivative with a pressure source, whereupon the original Druckmittelzufuhrungsleitung is switched as a derivative , However, such a circuit can be changed outside of the rotating roller and thus from the machine itself. More complex controls can naturally be realized, if valve arrangements are provided or a plurality of separate channels is provided in the fluid line, which is possible with regard to the stationary fluid line but also without appreciable sealing problems is beneficial hiebei the training made so in that at least one fluid line is connected to a valve arrangement for acting on drives of a cutting roller widening, whereby the number of required ducts can be minimized.

A supply of fluid under pressure to the nozzles of the chisel in the central region of the roller, as it remains, for example between bearings on the cantilever arm, can be achieved in that returned to the central region of the roller with the roller co-rotating lines in one with the middle Part of the roller connected annular collecting duct member open. The annular collecting channel component allows hiebei the use of simple tubes inside the hollow cutting roller and high reliability is given by the possibility of supporting such collection channel components on the axial fluid line. In order to prevent vibrations in the pipes, a plurality of such supports can be provided over the axial length of the axial stationary fluid line, wherein in particular for the collecting channel component training is advantageously made so that the

-3AT393 296B

Collecting channel component is rotatably mounted on the axial stationary fluid line.

The invention will be explained in more detail with reference to embodiments schematically illustrated in the drawing. In this show Fig. 1 a schematic side view of a Walzenschrämmaschine; FIG. 2 a plan view in the direction of the arrow (Π) of FIG. 1 on the extension arm of the Walzenschrämmaschine; FIG. 3 an enlarged view of a arranged inside the hollow cutting roller reduction gear for the implementation or Supply of axial fluid lines in the interior of a hollow cutting roller, Fig. 4 a schematic representation of the arrangement of nozzles on the mantle of a cutting roller and provided therefor lines in the interior of the roller; FIG. 5 an enlarged view of a distributor near the front side of a cutting roller with the possibility of impingement of drives, such as a drive for the lateral widening of the roller and Fig. 6 a simplified design of a manifold, for which only a fluid supply line is required, since only a spraying takes place, wherein the spraying is done by intermittently pressurizing the individual nozzles of each of the working face facing sector on the surface of the cutting roller

In Fig. 1 a traveling on a crawler chassis (1) cutting machine (2) is shown wherein on a support arm (3) in the direction of the double arrow (4) höhenverschwenkbar a rotatably mounted cutting roller (5) is arranged. The drive motor for the rotary drive of the cutting roller (5) is schematically indicated by (6), wherein the motor shaft is axially parallel to the drive shaft (7) and via a first gear (8) connected to this drive shaft (7) The drive shaft (7) opens in the field there^- Carrier of the roller (5) in the interior of the cutting roller (5), as will be explained in more detail below.

In the illustration according to FIG. 1, the drum shredding machine (2) also has a loading device (9) formed by a ramp, and a height-adjustable conveyor (10) is schematically indicated at the rear end of the machine.

In the illustration of FIG. 2 it can be seen that the cutting roller (5) on the support arm (3) is mounted, wherein the mounting of the support arm is schematically indicated by (11) inside the support arm (3) is in turn the drive motor (6) and the transmission (8) arranged and the motion transmission via a single common drive shaft (7) into the interior of the cutting roller (5). The cutting roller (5) has in this case inner regions which lie within the bearing (11) and lateral regions projecting beyond the bearing (11), which may, for example, include a schematically indicated roll widening (12). The pivoting of the Schrämarmes (3) via the with (13) indicated, substantially horizontal pivot axis.

The gear for driving the cutting roller is shown in FIG. 3 clarified. In Fig. 3 the common drive shaft is again denoted by (7) and equipped with a bevel gear (14). In the interior of the cutting roller (5) a first bevel gear (15) is rotatably mounted, wherein the bearing is schematically denoted by (16) and is supported in a rigid housing part. The first bevel gear (15) mounted in this way in the interior of the cutting roller (5) has an internal toothing (17) into which cantilever stub shafts (18 and 19) dip. The two stub shafts (18,19) are substantially identical, with the further below for the stub shaft (18) described, further gear reduction in an analogous manner and symmetrically hiezu for the not shown further embodiment following the stub shaft (19) validity The stub shaft (18) has at its free end a sun gear toothing (20), which meshes with the toothing of intermediate wheels (21). The intermediate wheels (21) are rotatably mounted on a rigid support (22), wherein the rigid support (22) with the rigid housing part (23), for example by a screw (24) is connected to the rigid support (22) with the intermediate wheels (21) is surrounded by a ring gear (25), which ring gear (25) in turn rotatably connected to the sun gear (26) of a subsequent planetary gear train is connected. The compound of the ring gear (25) with the sun gear (26) via a toothing (27), which is separated by a circumferential groove (28) from the outer toothing of the sun gear (26) The flanks of the outer toothing of the sun gear (26) engage with the teeth of Planetenrädem (29) and the carrier of these planet gears (29) is integral with the driven part (30) of the gear of the cutting roller connected, wherein externally the Schrämwalzengrundkörper by means of spline connection rotatably connected to the driven part (30) and the inner roller parts with the same output member (30) are rotatably connected via a compound formed for example by a square. The output part of this cutting roller (30) is hollow in its interior, wherein the extending in the axial direction cavity is schematically indicated by (31). The planetary gears (29) are mounted on bearings (32) in the driven part (30) of the cutting roller (5), wherein the driven part (30) thus directly forms the carrier of the planet gears (29). The outer wall of the cutting drum (5) connected to the stripping section (30) has the same as in FIG. 3 not set chisel, which can be brought into engagement with the degraded material and the outer contour is indicated by dashed lines. Now to transmit the rotational movement of the sun gear (26) on the output member (30) of the planetary gears (29), is still another ring gear required, wherein this further ring gear (33) is non-rotatably connected to the carrier (22) of the intermediate wheels The stationary and non-rotatably connected to the carrier of the intermediate gears ring gear is externally covered by a to the output member (30) associated Schrämwalzenteil (34) so that also in this area chisels can be arranged, which can be set in rotation together with the driven part (30) of the cutting roller. The cutting roller

-4AT393 296B can be supported in the region of the driven part (30) via bearings (35) on a part of the bearing (11) of the support arm (3), wherein the wall part (34) of the cutting roller (5), which via a screw (36 ) is connected to the output part (30) of the cutting roller, is supported by bearings (37) on the transmission housing. With (38) is still schematically the bearing of the drive shaft (7) on the support arm (3) indicated.

With such a construction of the reduction gear, the possibility is created to guide lines (39) through the rigid support (22), which open into an area close to the axis (40). If, as shown in FIG. 3 shown, the axial portion of the driven part (30), which also forms the carrier of the planet gears (29) has an axial opening (41), there is an open connection between the supply of the lines (39) in the near-axis region (40) and the hollow interior (31) of the cutting roller, so that here with a small sealing effort any lines, such as fluid lines or electrical lines can be led out of the gear housing. The interior of the gear housing is denoted by (42) and can be filled in a conventional manner with lubricating oil, wherein due to the relatively small surfaces to be sealed in the axial aperture (41) of the driven part (30) of the planetary gears (29) here Gasket effort is significantly reduced.

An axial securing of the planet gears (29) against displacement in the axial direction can be achieved by a securing ring (43) which is connected by screws (44) to the output part (30) of the cutting roller (5), wherein the distance between the driven part ( 30) and the axial lock washer (43) is adjusted with pipe sections.

The fluid supply lines (39) open in the near-axis region (40) in a in the rigid part (22) inserted bushing (45), to which in the embodiment of FIG. 3 an axially disposed fluid line (46) connects, which is rigidly connected to the bushing (45), wherein the fluid line (46) is designed as a multi-walled tube, which has a central channel (47) and a further channel surrounding this central channel (47) (48) for the supply of fluid in two separate lines to in the region of the lateral end faces of the roller (5) arranged distributors, as shown in FIG. 5 and 6 are described in more detail. Between the rotatable base body (30) and the non-rotatably mounted fluid line (46) lying on a small radius seals (49) are sufficient.

In Fig. 4 in turn, only one half of the cutting roller (5) is shown, wherein the support arm or the storage again with (3 or 11) is designated. Through the central and fixed fluid line (46) passes a fluid to a in Figs. 5 and 6 distributors (50) shown in detail in the region of the end face (51) of the cutting roller and from this distributor (50) lead substantially radial bores (52) arranged in the region of the shell of the cutting roller distribution holes (53) which in the schematically indicated chisel (54) allow spraying of, for example, cooling water via nozzles not shown, as indicated by (55). In addition to the connection holes (52 and 53) for spraying the chisels on the external cutting edge parts, lead from the distributor (50) axially extending lines (56) to an annular collecting channel member (57), which is rotatably mounted about the axial stationary fluid line (46), wherein substantially radial bores (58) lead from the collecting channel component to further distribution bores (59) in the inner region of the cutting roller, which in turn make it possible, via nozzles not shown, to spray the bits in the inner sections of the cutting roller. The lines (56) are distributed uniformly over the circumference, wherein, for example, for an impulse and / or sector control carried out with the distributor (50), eight lines (56) can be provided to target only partial areas of the peripheral surface even in the inner sliding roller areas To apply fluid to the cutting rollers.

In Fig. 5 is shown enlarged axial fixed line (46), which in turn shows the central channel (47) and the surrounding this channel ring line (48). This ring line (48) opens via a bore (60) in the feed region (61) of the stationarily arranged distributor (50), as shown for example in FIG. 6 is shown in more detail, wherein according to the schematically indicated distributor disc (62), which may be formed analogously to the training of the earlier application A 1097/88, fluid from the line (48) in turn in the supply lines (52) for spraying the outer Schrämwalzenteile than also in the axial feed lines (56) for spraying the inner Schrämwalzenteile, as shown in FIG. 4 is shown lead. Furthermore, a line (63) via a valve assembly (64) in a working space (65) of a schematically indicated cylinder-piston unit (66), which is used as a drive for a Schrämwalzenverbreiterung. After a pressure relief of the line (63), the cylinder piston unit (66) by supplying fluid into the second working space (67) in turn be brought into its original position, wherein the supply of fluid under pressure in the second working space (67) via a further valve arrangement by feeding fluid from the axial channel (47) of the stationary axial conduit (46). The transition from the fixed housing part (69) connected to the stationary fluid line (46) into the rotatable component (70) connected to the rotating main body of the cutting roller takes place in a manner known per se via a rotary feedthrough (71) with a small diameter.

FIG. 6 shows in more detail the distributor (50) which is arranged at the end of the end face, wherein in this illustrated embodiment a cutting roller widening is dispensed with. The supply line into the fixed access area (61) of the slide can be either the supply line (60), as shown in Fig. 5, or directly from the stationary axial fluid line (46) may be formed, wherein in this

-5AT393 296B

Embodiment then only a fluid line is provided for spraying.

The in Fig. 6 shown distributor corresponds to the formation of a distributor for a pulse and sector control, as used for example for Schrämköpfe and is described in the earlier application of the Applicant A1097 / 88 About the stationary and non-rotatably mounted part of the distributor passes through a distributor disc ( 72) via the line (60 or 46) supplied to the lines (52) to the outer Schrämwalzenteilen and in the axial direction of the cutting roller extending lines (56) which allow spraying of the central portions of the cutting roller, as shown in FIG. 4 is indicated

The impulse and sector control is carried out in such a way in that the stationary disk (72) of the distributor has radial slots (73) at its circumference and that a further disk (74), likewise with radial slots (75), is provided immediately behind the disk (72), wherein the second disc (74) is connected to the rotatable part (70) of the base body of the cutting roller. The rotation of the part (70) with the disc (74) causes the slots (73 and 75) to be mutually crossed over, whereby a pulse control is achieved. The subsequent sector control is carried out in such a way that the slots (73) in the fixed disc (72) of the distributor extend only over a certain circumferential angle, so that only over a limited peripheral area a connection between the supply line (60) over the space ( 76) through the slots (73 or 75) of the discs in the rotatable part (70) arranged bores (52) is made possible. In this way, intermittent and sector-controlled spraying of the internal parts of the cutting roller takes place only via the corresponding lines (56) assigned to the limited circumferential area.