CN214390727U

CN214390727U - Powder spraying device for heat exchanger production

Info

Publication number: CN214390727U
Application number: CN202022252996.9U
Authority: CN
Inventors: 张宇
Original assignee: Zibo Baofeng Heat Exchange Equipment Co ltd
Current assignee: Zibo Baofeng Heat Exchange Equipment Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-10-15
Anticipated expiration: 2030-10-10

Abstract

The utility model relates to the technical field of heat exchanger production, in particular to a powder spraying device for heat exchanger production, which comprises a spraying box, wherein the spraying box is internally provided with a spraying cavity, the top end of the spraying box is fixedly connected with a transmission box, the transmission box is internally provided with a transmission cavity, the powder spraying device also comprises a transmission shaft, a rotating sleeve, a driven shaft, a left working shaft and a right working shaft, the top end and the bottom end of the transmission cavity are symmetrically provided with middle through holes, a middle bearing is arranged inside the middle through holes, both ends of the circumferential outer wall of the transmission shaft are connected with the inner diameter of the middle bearing, the bottom end of the transmission cavity is fixedly connected with a transmission motor, the output shaft of the transmission motor is fixedly connected with a driving bevel gear, the circumferential outer wall of the transmission shaft is fixedly connected with a driven bevel gear, the problem that most spraying effects are poor is solved, the heat exchanger has dead corners and is not easy to spray in place, and powder is more serious when spraying, thereby being not beneficial to the problem that workers hang or take down the heat exchanger.

Description

Powder spraying device for heat exchanger production

Technical Field

The utility model relates to a heat exchanger production technical field specifically is a powder spray device for heat exchanger production.

Background

As is known, a powder spray device for heat exchanger production is one kind and is used for the heat exchanger production in-process, to its surface auxiliary device that dusts and color, and it has obtained extensive use in the field that the heat exchanger was dusted, and the powder spray device of current heat exchanger production usefulness discovers in use that the effect of most spraying is relatively poor, and the heat exchanger has the dead angle and is difficult for spraying to target in place to when the spraying, the powder flies upward comparatively seriously, thereby is unfavorable for the workman to hang or take off the heat exchanger.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a powder spray device for heat exchanger production has solved the effect of most spraying relatively poor, and the heat exchanger has the difficult spraying in dead angle to target in place to when the spraying, the powder flies upward comparatively seriously, thereby is unfavorable for the workman to hang or take off the problem of heat exchanger.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a powder spraying device for heat exchanger production comprises a spraying box, wherein a spraying cavity is arranged inside the spraying box, a transmission box is fixedly connected to the top end of the spraying box, a transmission cavity is arranged inside the transmission box, the powder spraying device further comprises a transmission shaft, a rotating sleeve, a driven shaft, a left working shaft and a right working shaft, middle through holes are symmetrically formed in the top end and the bottom end of the transmission cavity, a middle bearing is arranged inside the middle through holes, two ends of the circumferential outer wall of the transmission shaft are connected with the inner diameter of the middle bearing, the bottom end of the transmission cavity is fixedly connected with a transmission motor, an output shaft of the transmission motor is fixedly connected with a driving bevel gear, a driven bevel gear is fixedly connected to the circumferential outer wall of the transmission shaft, a rotating through hole is formed in the top end of the spraying cavity, a rotating bearing is arranged inside the rotating through hole, and the circumferential outer wall of the rotating sleeve is connected with the inner diameter of the rotating bearing, and the inner wall of the rotating sleeve is fixedly connected with a fixed bearing, the circumferential outer wall of the driven shaft is connected with the inner diameter of the fixed bearing, the bottom of the rotating sleeve is fixedly connected with a rotating box, a working chamber is arranged in the rotating box, two groups of working through holes are symmetrically arranged at the top end and the bottom end of the working chamber, the number of the working through holes in each group is two, the two working through holes in each group are bilaterally symmetrical, a working bearing is arranged in each working through hole, the two ends of the circumferential outer wall of the left working shaft are connected with the inner diameter of the working bearing positioned on the left side, the bottom end of the left working shaft extends to the lower side of the working chamber through the working bearing, the two ends of the circumferential outer wall of the right working shaft are connected with the inner diameter of the working bearing positioned on the right side, and the bottom end of the right working shaft extends to the lower side of the working chamber through the working bearing, the bottom end of the left working shaft and the bottom end of the right working shaft are both fixedly connected with a fixed plate, the front end of the fixed plate is provided with a fixed groove, the top end and the bottom end of the working chamber are symmetrically provided with stabilizing through holes, stabilizing bearings are arranged inside the stabilizing through holes, the bottom end of the driven shaft extends to the lower side of the rotating box through the stabilizing bearings, the circumferential outer wall of the driven shaft is fixedly connected with a rotating driving gear, the circumferential outer wall of the left working shaft and the circumferential outer wall of the right working shaft are both fixedly connected with a rotating driven gear, the circumferential outer wall of the rotating sleeve is fixedly connected with a lower rotating driven gear, the circumferential outer wall of the driven shaft is fixedly connected with an upper rotating driven gear, the circumferential upper side and the lower side of the transmission shaft are respectively fixedly connected with an upper rotating driving gear and a lower rotating driving gear, and the left end of the spraying chamber is fixedly connected with a cylinder without a piston rod, the right end of the piston rod-free cylinder is fixedly connected with a powder spray head, the left end of the spraying cavity is provided with a powder port, the left end of the spraying box is fixedly connected with a spraying platform, the top end of the spraying platform is fixedly connected with a powder box, the top end of the powder box is fixedly connected with a spraying powder pump, the outlet of the spraying powder pump is communicated with the powder port, the powder port is communicated with the spray head through a spiral hose, the bottom end of the spraying cavity is fixedly connected with a water tank, the right end of the water tank is communicated with a water supply pipe, the right end of the spraying cavity is provided with a water supply through hole, the right end of the water supply pipe extends to the outer side of the spraying cavity through the water supply through hole, the right end of the spraying box is fixedly connected with a driving platform, the top end of the driving platform is fixedly connected with a water pump, and the right end of the water supply pipe is communicated with the inlet of the water pump, the right-hand member of spraying cavity is provided with the water inlet, the export of water pump with the water inlet intercommunication, the right-hand member of spraying cavity is provided with the water curtain board, the top of water curtain board is provided with the ponding pond, the left end in ponding pond sets up a plurality of discharge orifices, the front end of spraying case is connected with the chamber door through hinge joint.

Preferably, a handle is arranged at the front end of the box door.

Preferably, the front end of the box door is provided with an observation window.

Preferably, the front end of the box door is provided with a fixing through hole, and a door lock is arranged in the fixing through hole.

Preferably, the driving bevel gear and the driven bevel gear are both spiral bevel gears.

Preferably, the stabilizing bearing and the working bearing are both bearings with sealing rings.

(III) advantageous effects

Compared with the prior art, the utility model provides a powder spray device for heat exchanger production possesses following beneficial effect:

the powder spraying device for heat exchanger production is characterized in that a transmission motor is arranged, the transmission motor is started, the transmission motor rotates to drive a driving bevel gear to rotate, the driving bevel gear drives a driven bevel gear to rotate, the driven bevel gear drives a transmission shaft to rotate, the transmission shaft drives a lower rotating driving gear to rotate, the lower rotating driving gear drives a lower rotating driven gear to rotate, the lower rotating driven gear drives a rotating sleeve to rotate, the rotating sleeve drives a rotating box to rotate, the transmission shaft drives an upper rotating driving gear to rotate, the upper rotating driving gear drives an upper rotating driven gear to rotate, the upper rotating driven gear drives a driven shaft to rotate, the driven shaft drives a rotating driving gear to rotate, the rotating driving gear drives a rotating driven gear to rotate, the rotating driven gear drives a left working shaft and a right working shaft to rotate, thereby driving a fixing plate to rotate, and when a powder spray nozzle works, the surface that makes the heat exchanger can both be sprayed, start the spraying powder pump, powder in the powder case supplies with the powder shower nozzle through the spraying powder pump, carry out the spraying to the heat exchanger through the powder shower nozzle, start the water pump, water in the water tank passes through the water pump and supplies to the ponding pond in, when the liquid level reaches certain height in the ponding pond, water flows to the water curtain board by the discharge orifice on the surface, flow to the water tank in by the surface of water curtain board again, thereby reach the mesh that carries out the dust fall to the spraying cavity, wherein it reciprocates to be convenient for no piston rod cylinder drive powder shower nozzle through setting up the spiral hose.

Drawings

FIG. 1 is a schematic sectional view of the structure of the present invention;

FIG. 2 is a schematic view of the structure of the present invention;

fig. 3 is a schematic top view of the structural fixing plate of the present invention.

In the figure: 1. a spraying box; 2. a spray chamber; 3. a transmission case; 4. a transmission chamber; 5. a drive shaft; 6. Rotating the sleeve; 7. a driven shaft; 8. a left working shaft; 9. a right working shaft; 10. a middle bearing; 11. a drive motor; 12. a driving bevel gear; 13. a driven bevel gear; 14. a rotating bearing; 15. fixing the bearing; 16. a rotating box; 17. a working chamber; 18. a working bearing; 19. a fixing plate; 20. fixing the groove; 21. stabilizing the bearing; 22. rotating the drive gear; 23. rotating the driven gear; 24. a lower rotation driven gear; 25. the driven gear is rotated upwards; 26. rotating the driving gear upwards; 27. a lower rotation driving gear; 28. A piston rod-free cylinder; 29. a powder spray head; 30. a spraying platform; 31. a powder box; 32. spraying a powder pump; 33. a spiral hose; 34. a water tank; 35. a drive platform; 36. a water pump; 37. a water curtain plate; 38. A water accumulation pool; 39. a water flowing hole; 40. a box door; 41. a handle; 42. an observation window; 43. a door lock is provided.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a powder spraying device for heat exchanger production comprises a spraying box 1, a spraying chamber 2 is arranged inside the spraying box 1, a transmission box 3 is fixedly connected to the top end of the spraying box 1, a transmission chamber 4 is arranged inside the transmission box 3, a transmission shaft 5, a rotating sleeve 6, a driven shaft 7, a left working shaft 8 and a right working shaft 9 are further included, middle through holes are symmetrically arranged at the top end and the bottom end of the transmission chamber 4, a middle bearing 10 is arranged inside the middle through hole, two ends of the circumferential outer wall of the transmission shaft 5 are connected with the inner diameter of the middle bearing 10, a transmission motor 11 is fixedly connected to the bottom end of the transmission chamber 4, a driving bevel gear 12 is fixedly connected to the output shaft of the transmission motor 11, a driven bevel gear 13 is fixedly connected to the circumferential outer wall of the transmission shaft 5, a rotating through hole is arranged at the top end of the spraying chamber 2, a rotating bearing 14 is arranged inside the rotating through hole, the circumference outer wall of the rotating sleeve 6 is connected with the inner diameter of a rotating bearing 14, the inner wall of the rotating sleeve 6 is fixedly connected with a fixed bearing 15, the circumference outer wall of the driven shaft 7 is connected with the inner diameter of the fixed bearing 15, the bottom end of the rotating sleeve 6 is fixedly connected with a rotating box 16, the rotating box 16 is internally provided with a working chamber 17, the top end and the bottom end of the working chamber 17 are symmetrically provided with two groups of working through holes, the number of each group of working through holes is two, the two working through holes in each group of working through holes are bilaterally symmetrical, the working through holes are internally provided with working bearings 18, the two ends of the circumference outer wall of the left working shaft 8 are connected with the inner diameter of the working bearing 18 positioned on the left side, the bottom end of the left working shaft 8 extends to the lower side of the working chamber 17 through the working bearings 18, the two ends of the circumference outer wall of the right working shaft 9 are connected with the inner diameter of the working bearing 18 positioned on the right side, and the bottom end of the right working shaft 9 extends to the lower side of the working chamber 17 through the working bearings 18, the bottom end of the left working shaft 8 and the bottom end of the right working shaft 9 are fixedly connected with a fixing plate 19, the front end of the fixing plate 19 is provided with a fixing groove 20, the top end and the bottom end of the working chamber 17 are symmetrically provided with stabilizing through holes, stabilizing bearings 21 are arranged inside the stabilizing through holes, the bottom end of the driven shaft 7 extends to the lower side of the rotating box 16 through the stabilizing bearings 21, the circumferential outer wall of the driven shaft 7 is fixedly connected with a rotating driving gear 22, the circumferential outer wall of the left working shaft 8 and the circumferential outer wall of the right working shaft 9 are both fixedly connected with a rotating driven gear 23, the circumferential outer wall of the rotating sleeve 6 is fixedly connected with a lower rotating driven gear 24, the circumferential outer wall of the driven shaft 7 is fixedly connected with an upper rotating driven gear 25, the circumferential upper side and the lower side of the driving shaft 5 are respectively fixedly connected with an upper rotating driving gear 26 and a lower rotating driving gear 27, and the left end of the spraying chamber 2 is fixedly connected with a piston-rod-free cylinder 28, the right end of the piston-rod-free cylinder 28 is fixedly connected with a powder spray head 29, the left end of the spraying chamber 2 is provided with a powder port, the left end of the spraying box 1 is fixedly connected with a spraying platform 30, the top end of the spraying platform 30 is fixedly connected with a powder box 31, the top end of the powder box 31 is fixedly connected with a spraying powder pump 32, the outlet of the spraying powder pump 32 is communicated with the powder port, the powder port is communicated with the spray head through a spiral hose 33, the bottom end of the spraying chamber 2 is fixedly connected with a water box 34, the right end of the water box 34 is communicated with a water supply pipe, the right end of the spraying chamber 2 is provided with a water supply through hole, the right end of the water supply pipe extends to the outer side of the spraying chamber 2 through the water supply through hole, the right end of the spraying box 1 is fixedly connected with a driving platform 35, the top end of the driving platform 35 is fixedly connected with a water pump 36, the right end of the water supply pipe is communicated with the inlet of the water pump 36, and the right end of the spraying chamber 2 is provided with a water inlet, the outlet of the water pump 36 is communicated with the water inlet, the right end of the spraying chamber 2 is provided with a water curtain plate 37, the top end of the water curtain plate 37 is provided with a water accumulating tank 38, the left end of the water accumulating tank 38 is provided with a plurality of water flowing holes 39, the front end of the spraying tank 1 is hinged with a tank door 40 through hinges, the transmission motor 11 is provided with a transmission motor 11, the transmission motor 11 is selected from a motor with the model of Y100L-2, the transmission motor 11 is energized with working voltage, the transmission motor 11 rotates to drive the driving bevel gear 12 to rotate, the driving bevel gear 12 drives the driven bevel gear 13 to rotate, the driven bevel gear 13 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the lower rotation driving gear 27 to rotate, the lower rotation driving gear 27 drives the lower rotation driven gear 24 to rotate, the lower rotation driven gear 24 drives the rotation sleeve 6 to rotate, the rotation sleeve 6 drives the rotation box 16 to rotate, and the transmission shaft 5 drives the upper rotation driving gear 26 to rotate, the upper rotation driving gear 26 drives the upper rotation driven gear 25 to rotate, the upper rotation driven gear 25 drives the driven shaft 7 to rotate, the driven shaft 7 drives the rotation driving gear 22 to rotate, the rotation driving gear 22 drives the rotation driven gear 23 to rotate, the rotation driven gear 23 drives the left working shaft 8 and the right working shaft 9 to rotate, so as to drive the fixing plate 19 to rotate, when the powder spray head 29 works, the surface of the heat exchanger can be sprayed, the powder spray pump 32 is started, the powder in the powder box 31 is supplied to the powder spray head 29 through the powder spray pump 32, the heat exchanger is sprayed through the powder spray head 29, the water pump 36 is started, the water in the water box 34 is supplied to the water collecting tank 38 through the water pump 36, when the liquid level in the water collecting tank 38 reaches a certain height, the water flows onto the surface of the water curtain plate 37 through the water flowing holes 39 and then flows into the water box 34 through the surface of the water curtain plate 37, thereby reach the mesh of carrying out the dust fall to spraying chamber 2, wherein it reciprocates to be convenient for no piston rod cylinder 28 to drive powder shower nozzle 29 through setting up the spiral hose 33, and the external world disposes complete set pneumatic means, the front end of chamber door 40 is provided with handle 41, be convenient for open and close chamber door 40, the front end of chamber door 40 is provided with observation window 42, be convenient for observe the spraying state of heat exchanger, the front end of chamber door 40 is provided with fixing hole, fixing hole's inside is provided with lock 43, be convenient for fix chamber door 40, prevent the dust diffusion, initiative bevel gear 12 and driven bevel gear 13 are spiral bevel gear, improve the transmission moment of torsion, reduce the transmission noise, stabilizing bearing 21 and working bearing 18 and being the bearing of taking the sealing washer, prevent that external foreign matter from getting into the inside of bearing, thereby damage the bearing.

When the heat exchanger is used, firstly, the box door 40 is opened, the heat exchanger is hung on the fixing plate 19, then the box door 40 is closed, the transmission motor 11 is started, the transmission motor 11 rotates to drive the driving bevel gear 12 to rotate, the driving bevel gear 12 drives the driven bevel gear 13 to rotate, the driven bevel gear 13 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the lower rotation driving gear 27 to rotate, the lower rotation driving gear 27 drives the lower rotation driven gear 24 to rotate, the lower rotation driven gear 24 drives the rotation sleeve 6 to rotate, the rotation sleeve 6 drives the rotation box 16 to rotate, the transmission shaft 5 drives the upper rotation driving gear 26 to rotate, the upper rotation driving gear 26 drives the upper rotation driven gear 25 to rotate, the upper rotation driven gear 25 drives the driven shaft 7 to rotate, the driven shaft 7 drives the rotation driving gear 22 to rotate, the rotation driving gear 22 drives the rotation driven gear 23 to rotate, and the rotation driven gear 23 drives the left working shaft 8 and the right working shaft 9 to rotate, thereby driving the fixed plate 19 to rotate, the fixed plate 19 drives the heat exchanger to rotate, then the spraying powder pump 32 is started, the powder in the powder box 31 is supplied to the powder spray head 29 through the spraying powder pump 32, the heat exchanger is sprayed through the powder spray head 29, the action of the piston rod-free cylinder 28 is controlled, the piston rod-free cylinder 28 drives the dust spray head to reciprocate up and down, finally the water pump 36 is started, the water in the water tank 34 is supplied to the water accumulation tank 38 through the water pump 36, when the liquid level in the water accumulation tank 38 reaches a certain height, the water flows to the surface of the water curtain plate 37 through the water flowing holes 39 and then flows to the water tank 34 through the surface of the water curtain plate 37, and therefore the purpose of dust reduction of the spraying chamber 2 is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a powder spray device for heat exchanger production, includes spraying case (1), and the inside of spraying case (1) is provided with spraying chamber (2) to the top fixedly connected with transmission case (3) of spraying case (1), the inside of transmission case (3) is provided with transmission chamber (4), its characterized in that: the spraying device is characterized by further comprising a transmission shaft (5), a rotating sleeve (6), a driven shaft (7), a left working shaft (8) and a right working shaft (9), wherein middle through holes are symmetrically formed in the top end and the bottom end of the transmission chamber (4), a middle bearing (10) is arranged inside the middle through holes, two ends of the circumferential outer wall of the transmission shaft (5) are connected with the inner diameter of the middle bearing (10), the bottom end of the transmission chamber (4) is fixedly connected with a transmission motor (11), an output shaft of the transmission motor (11) is fixedly connected with a driving bevel gear (12), a driven bevel gear (13) is fixedly connected with the circumferential outer wall of the transmission shaft (5), the top end of the spraying chamber (2) is provided with a rotating through hole, a rotating bearing (14) is arranged inside the rotating through hole, and the circumferential outer wall of the rotating sleeve (6) is connected with the inner diameter of the rotating bearing (14), and the inner wall of the rotating sleeve (6) is fixedly connected with a fixed bearing (15), the circumference outer wall of the driven shaft (7) is connected with the inner diameter of the fixed bearing (15), the bottom end of the rotating sleeve (6) is fixedly connected with a rotating box (16), the inside of the rotating box (16) is provided with a working chamber (17), the top end and the bottom end of the working chamber (17) are symmetrically provided with two groups of working through holes, the number of the working through holes in each group is two, the two working through holes in each group of working through holes are bilaterally symmetrical, the inside of the working through holes is provided with a working bearing (18), the circumference outer wall two ends of the left working shaft (8) are connected with the inner diameter of the working bearing (18) positioned on the left side, the bottom end of the left working shaft (8) passes through the working bearing (18) and extends to the lower side of the working chamber (17), the circumference outer wall two ends of the right working shaft (9) are connected with the inner diameter of the working bearing (18) positioned on the right side, and the bottom of the right working shaft (9) is extended to the lower side of the working chamber (17) through the working bearing (18), the bottom of the left working shaft (8) and the bottom of the right working shaft (9) are fixedly connected with a fixing plate (19), the front end of the fixing plate (19) is provided with a fixing groove (20), the top end and the bottom end of the working chamber (17) are symmetrically provided with stabilizing through holes, stabilizing bearings (21) are arranged inside the stabilizing through holes, the bottom end of the driven shaft (7) is extended to the lower side of the rotating box (16) through the stabilizing bearings (21), the outer wall of the circumference of the driven shaft (7) is fixedly connected with a rotating driving gear (22), the outer wall of the circumference of the left working shaft (8) and the outer wall of the circumference of the right working shaft (9) are fixedly connected with a rotating driven gear (23), the outer wall of the rotating sleeve (6) is fixedly connected with a lower rotating driven gear (24), the circumference outer wall fixedly connected with of driven shaft (7) rotates driven gear (25) last, the circumference upside and the downside of transmission shaft (5) rotate driving gear (26) and lower rotation driving gear (27) respectively fixedly connected with, the left end fixedly connected with of spraying chamber (2) does not have piston rod cylinder (28), the right-hand member fixedly connected with powder shower nozzle (29) of no piston rod cylinder (28), the left end of spraying chamber (2) sets up the powder mouth, the left end fixedly connected with of spraying case (1) sprays platform (30), the top fixedly connected with powder case (31) of spraying platform (30), the top fixedly connected with of powder case (31) sprays powder pump (32), the export of spraying powder pump (32) with the powder mouth intercommunication, the powder mouth with the shower nozzle passes through spiral hose (33) intercommunication, the bottom end of the spraying cavity (2) is fixedly connected with a water tank (34), the right end of the water tank (34) is communicated with a water supply pipe, the right end of the spraying cavity (2) is provided with a water supply through hole, the right end of the water supply pipe extends to the outer side of the spraying cavity (2) through the water supply through hole, the right end of the spraying box (1) is fixedly connected with a driving platform (35), the top end of the driving platform (35) is fixedly connected with a water pump (36), the right end of the water supply pipe is communicated with an inlet of the water pump (36), the right end of the spraying cavity (2) is provided with a water inlet, an outlet of the water pump (36) is communicated with the water inlet, the right end of the spraying cavity (2) is provided with a water curtain plate (37), the top end of the water curtain plate (37) is provided with a water accumulating tank (38), and the left end of the water accumulating tank (38) is provided with a plurality of water discharge holes (39), the front end of the spraying box (1) is hinged with a box door (40) through a hinge.

2. A powder injection device for heat exchanger production as claimed in claim 1, wherein: the front end of the box door (40) is provided with a handle (41).

3. A powder injection device for heat exchanger production as claimed in claim 2, wherein: the front end of the box door (40) is provided with an observation window (42).

4. A powder injection device for heat exchanger production as claimed in claim 3, wherein: the front end of the box door (40) is provided with a fixing through hole, and a door lock (43) is arranged in the fixing through hole.

5. A powder spraying device for heat exchanger production according to claim 4, characterized in that: the driving bevel gear (12) and the driven bevel gear (13) are both spiral bevel gears.

6. A powder spraying device for heat exchanger production according to claim 5, characterized in that: the stabilizing bearing (21) and the working bearing (18) are both bearings with sealing rings.