Device for pressing the sealing material obturating the split between relative mouving parts, for example a rotative drum installation.

p0001The invention relates to an apparatus for pressing a gap between two relatively moving parts sealing gasket material - for example, in a rotary drum system - consisting of two or more inserted in the fixed part of the seal elements axially mounted against on the rotating part opposite surface are pressed.

p0002A preferred application of the above device is the sealing of rotary kilns, for example, rotary drum plants.

p0003Here, the torque tubes against the stationary inlet and outlet structures must be sealed, as a rule in the rotary tube is present a deviating from the atmospheric pressure, or an incorrect air intake must be avoided in the rotary tube or gas discharge into the atmosphere.

p0004Such seals are known, and are placed, for example, by the company Burgmann, Wolfratshausen, in the trade. With this construction, the sealing is carried out so that, be lodged with two relatively moving parts in the fixed part of the sealing elements, in particular a packing cord, which by means of a plurality of segment-like metal strips and spring elements against the rotating, connected to the rotating tube counter surface - a circular disc - are pressed.

p0005This resilient pressing is necessary to compensate for inaccuracies in the concentricity or the flatness of the mating surface. These inaccuracies are due to the large dimensions of such rotating drum equipment or temperature effects, triggered by procedural necessities, and have the effect that the distance between the fixed part and the rotating counter surface around an average moves back and forth. The required close nestling the packing cord on the opposite surface is the more exact, the greater the number of spring elements. These spring elements must be adjustable by means of screws, to compensate for the decline in the wear of the packing cord pressing force.

p0006The drawback of this seal however, lies in the type of pressing the packing cord on the opposite surface by means of a plurality of segment-like sheet metal strip and readjustable spring elements. This type of seal is complicated in its construction, the replacement of the packing cord is complicated and the constant adjustment of the spring elements is maintenance intensive.

p0007It was therefore the task of pressing the sealing elements, in such a way in particular the packing cord, that a completely uniform over the circumference of contact pressure is created, regardless of inaccuracies in the counter surface and temperature effects, while avoiding the disadvantages mentioned above.

p0008This object is achieved in that the pressing of the sealing elements by means of a pressurized hose.

p0009Further features of the invention according to the invention are the subject matter of the dependent claim.

p0010Various embodiments of the invention with the essential inventive features are shown in the drawing and will be described in more detail below.

p00111 shows a rotary tube 1, to which the annular mating surface 2 of the sealing construction is welded. In the fixed part 3 of the seal structure, which is connected via a flexible or rigid fastener 4, depending on the design of the seal with the stationary inlet and outlet structure 5 of the rotary drum system, the packing cord 6 is inserted. The pressurized hose 7 is also arranged behind the packing cord in the stationary part of the seal structure, that over the entire packing cord length evenly distributed contact pressure presses the packing cord on the orbiting with the rotary tube counter surface. The ruling in the hose pressure is usually by means of a fluid, such as compressed air or water is generated. All inaccuracies as described disadvantage of the counter-surface, which have a movement of the packing cord to the sequence are taken part of the hose. Declining by the wear of the packing cord pressing force can be detected on the pressure present in the tubing fluid, and are corrected by refilling compressed air during operation.

p0012The constant pressure can be automated by means of a pressure reservoir and the appropriate equipment with measurement and control devices. Furthermore, it may be useful to use the fluid for heat exchange, in which it is constantly passed through the tube. Another variation is that the hose can be endless or finally procure.

p0013Ultimately, the sealing of two relatively moving parts by means of the inventive device for pressing the sealing gasket material is clearly improved.

p0014It goes without saying that the device according to the invention is not limited to the embodiments described above, but may be varied constructively in the context of the inventive features.

p0015Such other possible embodiments are described below, for example.

p00162 shows a construction in which the circular mating surface is replaced by a Slid on the rotary tube sleeve 2 which is welded to the rotating tube to form a unit.

p0017Figure 3 and 3a shows a construction in which two or more tubes in succession to increase the elasticity are arranged. Here, a hose, as shown in Figure 3, are inserted unfilled, and only then, if it requires the emaciated packing cord - to be acted upon by pressure - according to figure 3a.

p0018Via the pressure of the fluid during operation, the contact pressure can be increased or decreased, depending on the requirements of the operation. It is also possible under certain operating conditions, such as to protect the packing cord completely take away the pressure of the fluid, for example, startup and shutdown or trial runs of the rotary drum system and to make the seal at a given time by feeding pressure becomes active again.

p0019In certain cases it may be advantageous to lift the packing cord of the opposite surface, which may be accomplished by venting and applying a vacuum to the tube.

p0020The immediate use of another assembled at rest packing cord for wear or destruction of the first packing cord is possible with the embodiment of the invention of FIG. 4. It can be made active by feeding pressure on the limp hose the reserve packing cord without interrupting this pack cord.

p0021Another variation of the embodiment is that, for example, part 3 - is connected to the rotary tube 1, so packing cord 6 and tube 7 rotate with the rotary tube 1, and the mating surface 2 is designed stationary - according to Embodiment FIG. 1