Vacuum paint dipping device for hollow conductor stator

Abstract

The invention discloses a hollow conductor stator vacuum paint dipping device which comprises a paint dipping box and a vacuum unit, a circulating conveying chain is arranged in the paint dipping box, placing frames for placing stators are arranged on the conveying chain at intervals in the conveying direction of the conveying chain, a driving source for driving the conveying chain to move is arranged on the paint dipping box, and an air shower box is arranged on one side in the paint dipping box. A drying box is arranged on the other side in the paint dipping box, the conveying chain sequentially passes through the air shower box, the paint liquid and the drying box, and a communicating pipe for communicating the drying box with the air shower box is arranged between the drying box and the air shower box. The stators are firstly and sequentially subjected to air shower dust removal, paint dipping insulation and drying through conveying of the conveying chain, continuous paint dipping of all the stators is achieved, the device is suitable for large-scale continuous insulation paint dipping treatment of the stators, front and rear stators on the conveying chain can be synchronously subjected to air shower, paint dipping and drying, the waiting time is saved, and the production efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stator, in particular to a kind of hollow conductor stator vacuum paint device. BACKGROUND

[0002] Hollow conductor stator refers to the stator of motor whose winding is wound by hollow structure conductor, and its core feature is to realize the flow of cooling medium by using the hollow channel in conductor, thereby efficiently taking away the heat generated by stator winding during operation, which is suitable for high power density, high heat electric field.

[0003] In the actual production link of hollow conductor stator, after completing winding, insulation treatment is carried out, mainly through the way of vacuum paint, the environment of negative pressure is used to make insulating paint fully penetrate winding gap, so as to form uniform, bubble-free insulating paint film, thereby strengthening the insulation reliability, heat dissipation efficiency and structural stability of coil.

[0004] The vacuum paint equipment at present mainly includes paint dipping tank and vacuum pump, the paint dipping tank is vacuumized by vacuum pump, vertically lifting lifting platform is arranged in the paint dipping tank, the stator whose winding is completed is placed on the lifting platform in actual use, the stator is immersed in the paint liquid in the paint dipping tank by lowering the lifting platform, the lifting platform is raised after completion, and the subsequent stator needs to be naturally air-dried or moved to drying device for drying, which is troublesome and affects production efficiency, and the production efficiency is not high, which needs to be further improved. SUMMARY

[0005] In order to further improve production efficiency, the present application provides a kind of hollow conductor stator vacuum paint device.

[0006] The present application provides a kind of hollow conductor stator vacuum paint device, adopts the following technical scheme: A kind of hollow conductor stator vacuum paint device, including paint dipping tank and vacuum unit, the paint dipping tank has circulating conveying chain, the conveying chain is spaced apart and is used to place the placing rack for stator along its conveying direction, the paint dipping tank is provided with driving source for driving conveying chain to move, one side in the paint dipping tank is provided with air shower box, the other side in the paint dipping tank is provided with drying box, the conveying chain passes through air shower box, paint liquid and drying box in sequence, the drying box and air shower box are provided with the communication pipe for communicating each other.

[0007] Optionally, the drying box and the paint liquid have a spacing to form a draining area, the inner wall of the paint dipping tank is provided with a convex portion for abutting the placing rack at the corresponding draining area, the height of the convex portion gradually decreases from the center to both sides and forms an arc surface for abutting, the convex portion abuts the placing rack to make it in an inclined state, and the placing rack has a positioning groove for placing the stator at the bottom.

[0008] Optionally, the convex part is horizontally slidably connected to the paint dipping box, the inner wall of the paint dipping box is provided with a sliding groove for the horizontal sliding of the convex part, a reset spring for driving the convex part to move inward is arranged in the sliding groove, and a push rod for pushing the convex part to move outward is arranged in the sliding groove.

[0009] Optionally, the communication pipe is provided with a fan, the fan is used for driving the hot air flow in the drying box to the air shower box, and one end of the communication pipe in communication with the drying box is provided with a stop valve.

[0010] Optionally, the communication pipe is a square tube, and the top wall of the communication pipe is used for abutting against the bottom wall of the placing rack to support the placing rack.

[0011] Optionally, the inner wall of the air shower box is provided with a plurality of air shower nozzles which are uniformly distributed, and the air inlet ends of the air shower nozzles are in communication with the communication pipe.

[0012] Optionally, the top and bottom of the air shower box are provided with a first through groove penetrating through, the first through groove is used for the passing of the placing rack and the stator, the air shower box is provided with a cover plate corresponding to the first through groove, the cover plate is symmetrically arranged and used for closing the first through groove, one side of the cover plate is hinged to the air shower box, the other side of the cover plate has a gap for avoiding the conveying chain, one side of the cover plate has a rotating shaft for hinging, and the air shower box is provided with an opening and closing motor for driving the rotating shaft to rotate.

[0013] Optionally, the inner wall of the cover plate away from the rotating shaft is detachably connected with a dust collection box, and the dust collection box is provided with a dust collection opening for the entry of dust and impurities.

[0014] Optionally, one side of the air shower box is connected with a return pipe, one end of the return pipe is in communication with the inside of the air shower box, and the other end of the return pipe is in communication with the drying box.

[0015] Optionally, the top of the paint dipping box is provided with an opening, and the opening is provided with a top plate used for closing the opening, and one side of the top plate is hinged to the paint dipping box.

[0016] In summary, the present application has at least one of the following beneficial technical effects: 1. By placing the stators to be dipped in paint one by one on the placing racks of the conveying chain, the conveying of the conveying chain makes the stators first pass through the air shower box for air showering to remove dust and impurities on the stators and the coil windings, and then the stators are conveyed to be dipped in paint to realize paint dipping, the paint dipping box is vacuumized during paint dipping, and after paint dipping is completed, the stators are conveyed to the drying box for drying, thereby realizing the continuous paint dipping of the stators, being suitable for the batch continuous insulation paint dipping treatment of the stators, and the front and rear stators on the conveying chain can be synchronously subjected to air showering, paint dipping and drying, thereby saving the waiting time and effectively improving the production efficiency. 2. The design of the connecting pipe allows the hot air in the drying box to be circulated into the air shower box. In this way, while the stator is being air-dried and dust-removed in the air shower box, the residual heat of the hot air keeps the air shower box at a certain temperature. This not only removes moisture from the stator, but also allows the air in the gaps inside the stator windings to expand and be expelled by heat. This effectively removes the air in the stator windings before impregnation, ensuring the quality and effect of the subsequent impregnation. Moreover, it achieves energy recycling and realizes the goal of energy saving. 3. The hot air in the air shower box can be circulated back to the drying box through the return pipe for use, further realizing heat recovery and utilization, and further achieving the goal of energy saving; 4. After the stator is impregnated with paint, it is transported to the drying area for drying. During this process, excess paint on the stator drips back into the impregnation tank. At the same time, due to the contact of the protrusions, the placement rack and the stator are tilted during the drying process. Gravity allows the residual air and excess paint inside the stator to flow out along the gaps, reducing the possibility of internal air trapping. The degree of protrusion of the protrusions can be adjusted according to actual needs, thereby achieving the adjustment of the stator tilt angle and providing better applicability and adjustability. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of an embodiment of this application.

[0018] Figure 2 This is a structural diagram of the air shower box in the embodiments of this application.

[0019] Figure 3 This is a top view of the conveyor chain and connecting shaft in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Impregnation tank; 2. Vacuum unit; 3. Opening; 4. Top plate; 5. Paint liquid; 6. Sprocket; 7. Conveyor chain; 8. Connecting shaft; 9. Stator; 10. Placement rack; 11. Air shower box; 12. Drying box; 13. Air shower nozzle; 14. First through groove; 15. Cover plate; 16. Rotating shaft; 17. Draining area; 18. Protrusion; 19. Slide groove; 20. Return spring; 21. Push rod; 22. Operating end; 23. Through port; 24. Flip plate; 25. Connecting pipe; 26. Fan; 27. Shut-off valve; 28. Return pipe; 29. ​​Dust collection box; 30. Mounting groove; 31. Dust collection port; 32. Base frame; 33. Side frame; 34. Top frame; 35. Through hole; 36. Positioning groove. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0022] A vacuum impregnation device for a hollow conductor stator, such as Figure 1As shown, including the paint box 1 and vacuum unit 2, vacuum unit 2 using a vacuum pump for the paint box 1 is vacuumized, the top of the paint box 1 has an opening 3 and is provided with a top plate 4, the top plate 4 is used to close the opening 3, one side of the top plate 4 is hinged on the top of the paint box 1, and in actual use, when the stator 9 needs to be taken out, the top plate 4 is turned over and opened.

[0023] As shown in Figure 1 and Figure 3 The bottom of the paint box 1 has a paint liquid 5, and the four corners of the paint box 1 are rotatably provided with a sprocket 6, each sprocket 6 is connected by a closed loop and end-to-end conveying chain 7, two conveying chains 7 are arranged in front of and behind the conveying chain 7 in the embodiment, and a connecting shaft 8 is arranged between the two conveying chains 7 to connect them, both ends of the connecting shaft 8 are rotatably connected to the conveying chain 7, and a placing rack 10 for placing the stator 9 is hung on the connecting shaft 8, the placing rack 10 is in a drooping state under the action of its own gravity; In other embodiments, the conveying chain 7 can also be provided with one, and one end of the connecting shaft 8 is rotatably connected to the conveying chain 7; The sprocket 6 is provided with a driving source for driving it to rotate, and the driving source can adopt a driving motor. The bottom of the conveying chain 7 passes through the paint liquid 5, and the stator 9 to be dipped is placed on each placing rack 10. In this way, the driving source drives the sprocket 6 to rotate and then drives the conveying chain 7 to move, so that the placing rack 10 and the stator 9 are conveyed together, and when conveyed to the bottom, they are immersed in the paint liquid 5. Then the inside of the paint box 1 is vacuumized to realize the dipping in the vacuum environment, and the placing rack 10 after dipping is circulated to the opening 3 for taking out, which is suitable for batch dipping processing of multiple stators 9.

[0024] As shown in Figure 1 The inside of the paint box 1 is provided with an air shower box 11 on one side and a drying box 12 on the other side, and the conveying path of the conveying chain 7 passes through the air shower box 11 and the drying box 12. The stator 9 will first pass through the air shower box 11 for dust removal during conveying, and then be immersed in the paint liquid 5, and then enter the drying box 12 for drying. That is, the stator 9 on the placing rack 10 realizes multi-process treatment with the conveying of the conveying chain 7, realizes the multifunctionality of the paint box 1, and the front and rear stators 9 on the conveying chain 7 can be synchronized for air shower, dipping and drying, saving waiting time and effectively improving production efficiency.

[0025] As shown in Figure 1 and Figure 2As shown, the opposite sides of the air shower box 11 are provided with a plurality of air shower nozzles 13, the top and top of the air shower box 11 are provided with a first through slot 14 for placing the rack 10 and the stator 9, the air shower box 11 is provided with a cover plate 15 corresponding to the first through slot 14, the cover plate 15 at each first through slot 14 is symmetrically arranged, one side of the cover plate 15 is hinged to the air shower box 11 by means of a rotating shaft 16, the cover plate 15 is used to close the first through slot 14, so as to ensure that the air shower box 11 is in a relatively closed environment during the air shower, avoiding the direct falling of dust and impurities blown during the air shower into the paint 5 at the bottom; the side away from the hinge of the cover plate 15 has a gap for avoiding the conveying chain 7, the conveying of the conveying chain 7 passes through the air shower box 11, the opening and closing of the cover plate 15 can be driven to rotate by the opening and closing motor, realizing the opening and closing of the cover plate 15, in other embodiments, a reset torsional spring can also be arranged at the hinge of the cover plate 15, when the rack 10 is conveyed to abut the cover plate 15, it will drive it to flip open, after the conveying rack passes, the cover plate 15 will recover to the closed state under the reset action of the reset torsional spring, realizing the automatic opening and closing of the cover plate 15.

[0026] As shown in the figure, Figure 1 The drying box 12 and the paint 5 have a spacing and form a draining area 17, the stator 9 after being immersed in the paint is conveyed to the draining area 17 for draining, the paint 5 on the stator 9 and the rack 10 can drop to the bottom of the paint immersion tank 1 under the action of gravity, and the paint 5 is drained before being dried, realizing the recycling of the excess paint 5 and reducing the waste of the paint 5.

[0027] As shown in the figure, Figure 1 The inner wall of the paint immersion tank 1 corresponding to the draining area 17 is provided with a convex portion 18 for abutting the rack 10, the convex portion 18 drives the rack 10 to be in an inclined hanging state after abutting the rack 10, when the rack 10 is conveyed to the draining area 17 by the conveying chain 7, the convex portion 18 abuts the rack 10 to make it and the stator 9 in an inclined state, the residual air and excess paint 5 in the stator 9 are made to flow out along the gap by gravity, reducing the internal air pressure; the convex height of the convex portion 18 in this embodiment gradually decreases from the middle to the two ends and forms an arc surface for abutting, so that the effect of gradual transition can be achieved when abutting, reducing the sharp shaking of the rack 10 when passing through the convex portion 18, and also preventing the rack 10 from directly impacting the inner wall of the paint immersion tank 1.

[0028] As shown in the figure, Figure 1As shown, the convex part 18 is horizontally slidably connected on the inner wall of the paint dipping box 1, a sliding groove 19 is formed on the inner wall of the paint dipping box 1, the convex part 18 is horizontally slidably connected in the sliding groove 19, a reset spring 20 is arranged in the sliding groove 19 to drive the convex part 18 to reset, one end of the reset spring 20 is fixed with the convex part 18, and the other end is fixed with the inner wall of the sliding groove 19, a push rod 21 is arranged in the sliding groove 19, one end of the push rod 21 abuts against the convex part 18, and the other end is arranged outside the paint dipping box 1 to form an operating end 22, the push rod 21 is threadedly connected on the paint dipping box 1, so that the operating end 22 is rotated to move the end of the push rod 21 forward and backward to adjust, and then the reset action of the reset spring 20 is combined to adjust the convex part 18 on the inner wall of the paint dipping box 1, so as to adjust the inclination angle of the stator 9, and better applicability and adjustability are achieved.

[0029] As shown in the figure, Figure 1 The top and bottom of the drying box 12 are also provided with through openings 23 for the placing racks 10 to pass through, and the through openings 23 are also provided with flaps 24 to close the through openings 23, the structure of the flaps 24 is the same as that of the cover plate 15, the flaps 24 are also symmetrically arranged at the through openings 23, and one side of the flaps 24 is hinged on the drying box 12, so that when the through openings 23 are opened, the placing racks 10 on the conveying chain 7 can enter the drying box 12, and the through openings 23 are closed by the flaps 24 before drying, so as to ensure that the heat in the drying box 12 is not leaked, and the heat loss and waste are reduced, the inner wall of the drying box 12 is provided with a plurality of electric heating wires, and the electric heating wires are used for drying and heating.

[0030] As shown in the figure, Figure 1As shown, a communication pipe 25 connecting the drying box 12 and the air shower box 11 is arranged between the drying box 12 and the air shower box 11, the communication pipe 25 is a square pipe and is arranged on the upper end of the side wall of the drying box 12 and the air shower box 11, the top wall of the communication pipe 25 is a plane and is used to abut against the placing rack 10 to assist in supporting the placing rack 10, so that when the placing rack 10 is conveyed to the conveying chain 7 of the top horizontal section, the stress of the conveying chain 7 is effectively reduced, the phenomenon of sagging of the conveying chain 7 is prevented, and the placing rack 10 has better stability when the stator 9 is initially placed, and the phenomenon that the placing rack 10 shakes to cause the stator 9 to be not placed well is avoided; one end of the communication pipe 25 communicates with the inside of the drying box 12, and the other end communicates with the air shower chamber, and a fan 26 is arranged on the communication pipe 25, the fan 26 conveys the heat in the drying box 12 to the air shower box 11, so that good recycling of heat can be realized, after the drying box 12 completes the drying of one stator 9, the fan 26 is started to convey the heat in the drying box 12 to the air shower box 11 for continuous use, so as to prevent the opening of the upper flap 24 of the subsequent drying box 12 from causing a large amount of heat to be discharged to the outside to cause waste; and when the heat is circulated to the air shower box 11 for use, the air shower box 11 has a certain temperature, which can not only remove the moisture on the stator 9, but also make the air in the internal gap of the stator 9 winding expand and discharge, effectively discharging the air in the stator 9 winding before painting, ensuring the quality and effect of subsequent painting, and achieving the recycling of energy and the purpose of energy saving; and the air inlet end of the air shower nozzle 13 on the air shower box 11 communicates with the communication pipe 25, that is, the gas sprayed by the air shower nozzle 13 also has a certain temperature, which can realize the preliminary drying effect before the stator 9 is painted; a stop valve 27 is arranged on the end of the communication pipe 25 close to the drying box 12, and the stop valve 27 is used to realize the opening and closing of the communication pipe 25.

[0031] As shown in the drawings, Figure 1 A reflux pipe 28 is connected to one side of the air shower box 11, one end of the reflux pipe 28 communicates with the inside of the air shower box 11, and the other end communicates with the drying box 12, and a fan 26 is also arranged on the reflux pipe 28, which is used to convey heat from the air shower box 11 to the drying box 12, so that the hot air in the air shower box 11 can finally be circulated to the drying box 12 for use, further realizing the recycling of heat and the purpose of energy saving; that is, before the air shower box 11 completes the air shower and the cover plate 15 needs to be opened, the internal heat is sucked away through the reflux pipe 28 and conveyed to the drying box 12 for recycling.

[0032] As shown in the drawings, Figure 2As shown, the dust collection box 29 is arranged on the inner wall of the cover plate 15 at the bottom of the air shower box 11. The dust collection box 29 is detachably arranged on the side of the cover plate 15 away from the hinge. The dust collection box 29 can be fixed on the cover plate 15 by clamping or screw connection. An installation groove 30 is arranged on the cover plate 15 for installing the dust collection box 29. The side of the dust collection box 29 facing the hinge direction of the cover plate 15 is provided with a dust collection port 31. The dust collection port 31 is in communication with the inside of the dust collection box 29. In the process of air showering, dust and impurities will fall on the cover plate 15 at the bottom. When the cover plate 15 is subsequently opened by turning down, the cover plate 15 is turned from horizontal to inclined downward, or even the cover plate 15 is in a vertical downward state after turning. In this way, the dust and impurities on the surface of the cover plate 15 will fall under the action of gravity and enter the dust collection box 29 through the dust collection port 31 during the turning down of the cover plate 15, realizing automatic collection of dust and impurities. On the one hand, it prevents the dust and impurities inside the cover plate 15 from directly falling into the paint 5 below when the cover plate 15 is turned down and opened. On the other hand, the dust and impurities are collected in the dust collection box 29, which can effectively prevent the dust and impurities from being raised again during the subsequent air showering of the air shower box 11, reducing the dust raising phenomenon in the air shower box 11.

[0033] As shown in the figure, Figure 2 The placing rack 10 includes a bottom frame 32, a side frame 33, and a top frame 34. A plurality of vertical through holes 35 are formed in the bottom frame 32. The through holes 35 are mainly used for liquid leakage. The paint 5 remaining on the placing rack 10 and the stator 9 can fall back through the through holes 35 in time. A positioning groove 36 for placing the stator 9 is arranged on the bottom wall of the bottom frame 32. The positioning groove 36 serves as a horizontal limiting and positioning function, improving the stability of the stator 9. The side frame 33 is fixedly arranged or integrally arranged with the bottom frame 32. The top frame 34 is detachably connected with the side frame 33. The side frame 33 includes a plurality of vertical rods which are circumferentially and intermittently distributed. In this embodiment, the top frame 34 and the side frame 33 are connected by screw connection. In other embodiments, screw connection can also be used for detachable connection. The vertical height of the placing rack 10 can be adjusted by rotating the top frame 34. The stator 9 is placed in the positioning groove 36 after the top frame 34 is raised before placing. Then the top frame 34 is lowered to abut against the top wall of the stator 9, so that the stator 9 is stably placed in the placing rack 10.

[0034] The working principle of the embodiment of the present application is as follows: first, the stator 9 is placed on the placing rack 10 on the conveying chain 7. Then the conveying chain 7 drives the stator 9 on the placing rack 10 to be conveyed into the air shower box 11 for air showering and dust removal. Subsequently, the stator 9 is conveyed to the bottom of the paint dipping box 1 for paint dipping. After the paint dipping is completed, the stator 9 is conveyed to the draining area 17 for draining. After draining, the stator 9 is conveyed into the drying box 12 for drying. Finally, the stator 9 is conveyed back to the opening 3 of the paint dipping box 1 and taken out.

[0035] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A device for vacuum impregnation of a hollow conductor stator, characterized in that: The application relates to a paint dipping box (1) and a vacuum unit (2), the paint dipping box (1) is internally provided with a circulating conveying chain (7), the conveying chain (7) is provided with placing racks (10) for placing stators (9) at intervals along the conveying direction of the conveying chain (7), the paint dipping box (1) is provided with a driving source for driving the conveying chain (7) to move, one side of the paint dipping box (1) is provided with an air shower box (11), and the other side of the paint dipping box (1) is provided with a drying box (12), the conveying chain (7) sequentially passes through the air shower box (11), paint (5) and the drying box (12), and a communication pipe (25) for communicating the drying box (12) and the air shower box (11) is arranged between the drying box (12) and the air shower box (11).

2. A device for vacuum impregnation of a hollow conductor stator according to claim 1, characterized in that: The drying box (12) and the paint (5) are spaced apart to form a draining area (17), the inner wall of the paint dipping box (1) is provided with a convex part (18) for abutting against the placing rack (10) at the position corresponding to the draining area (17), the height of the convex part (18) gradually decreases from the center to the two sides and forms an arc surface for abutting, the convex part (18) abuts against the placing rack (10) to make the placing rack (10) in an inclined state, and the bottom of the placing rack (10) is provided with a positioning groove (36) for placing the stator (9).

3. A device for vacuum impregnation of a hollow conductor stator according to claim 2, characterized in that: The convex part (18) is horizontally slidably connected to the paint dipping box (1), the inner wall of the paint dipping box (1) is provided with a sliding groove (19) for horizontal sliding of the convex part (18), the sliding groove (19) is provided with a reset spring (20) for driving the convex part (18) to move inward and reset, the sliding groove (19) is provided with a push rod (21) for pushing the convex part (18) to move outward, the push rod (21) is screw-connected to the paint dipping box (1), one end of the push rod (21) abuts against the convex part (18), and the other end of the push rod (21) penetrates through the paint dipping box (1) to form an operation end (22).

4. The apparatus for coating a hollow conductor stator according to claim 1, wherein: The communication pipe (25) is provided with a fan (26), the fan (26) is used for driving hot air in the drying box (12) to flow into the air shower box (11), and one end of the communication pipe (25) in communication with the drying box (12) is provided with a stop valve (27).

5. A device for vacuum impregnation of a hollow conductor stator according to claim 4, characterized in that: The communication pipe (25) is a square pipe, and the top wall of the communication pipe (25) is used for abutting against the bottom wall of the placing rack (10) to support the placing rack (10).

6. A device for vacuum impregnation of a hollow conductor stator according to claim 4, characterized in that: The inner wall of the air shower box (11) is provided with a plurality of uniformly distributed air shower nozzles (13), and the air inlet ends of the air shower nozzles (13) are in communication with the communication pipe (25).

7. A device for vacuum impregnation of a hollow conductor stator according to claim 1 or 6, characterized in that: The top and bottom of the air shower box (11) are provided with first through grooves (14) penetrating through, the first through grooves (14) are used for the placing rack (10) and the stator (9) to pass through, the air shower box (11) is provided with cover plates (15) at the positions corresponding to the first through grooves (14), the cover plates (15) are symmetrically arranged and used for closing the first through grooves (14), one side of the cover plate (15) is hinged to the air shower box (11), the other side of the cover plate (15) is provided with a gap for avoiding the conveying chain (7), one side of the cover plate (15) is provided with a rotating shaft (16) for hinging, and the air shower box (11) is provided with an opening and closing motor for driving the rotating shaft (16) to rotate.

8. A device for vacuum impregnation of a hollow conductor stator according to claim 7, characterized in that: The dust collecting box (29) is detachably connected to the inner wall of the cover plate (15) away from the rotating shaft (16), and the dust collecting box (29) is provided with a dust collecting opening (31) for dust and impurities to enter.

9. A device for vacuum impregnation of a hollow conductor stator according to claim 6, characterized in that: One side of the air shower box (11) is connected with a backflow pipe (28), one end of the backflow pipe (28) is communicated with the inside of the air shower box (11), and the other end is communicated with the drying box (12).

10. The apparatus according to claim 1, wherein: The top of the paint dipping box (1) is provided with an opening (3), and a top plate (4) is arranged at the opening (3) and used for closing the opening (3), and one side of the top plate (4) is hinged to the paint dipping box (1).

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