Coil varnishing equipment for motor production

Abstract

The present invention relates to the field of motor technology, and in particular to a coil varnishing equipment for motor production, comprising a paint bucket, a plurality of jacks are provided in the bottom of the paint bucket along the circumferential direction, an outer cylinder is coaxially installed in each jack, a conical cover is coaxially fixed to the top of the outer cylinder, an inner cylinder is coaxially fixed in the outer cylinder, and a plurality of drainage pipes connected to the inner part of the outer cylinder are provided in the circumferential direction at the lower part of the outer cylinder; a filter is provided between the top of the inner cylinder and the conical cover, and the two ends of the filter are respectively coaxially rotatably connected to the conical cover and the inner cylinder, a liquid outlet is provided through the conical cover in the filter, and a plurality of liquid inlets are provided through the conical cover outside the filter. The present invention provides a plurality of outer cylinders, conical covers and other structures at the bottom of the paint bucket, so that the insulating paint at the bottom can flow upward in a ring shape, and the flowing insulating paint can impact the coils distributed in a ring shape on the stator, so that the speed at which the insulating paint penetrates into the gap of the coil winding is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a coil varnish dipping device for motor production. Background Art

[0002] During the production of motors, the coils need to be dipped in paint. Coil dipping refers to dipping the stator with the coils into a specific insulating paint to improve its insulation performance and durability. This process is designed to form a uniform insulating layer inside and outside the stator to prevent leakage, short circuit or other electrical faults during the operation of the motor. The more common coil dipping equipment currently available mainly includes a paint bucket. After pouring the insulating paint into the paint bucket, the stator is placed vertically in the paint bucket with one end of the coil winding facing up. The paint surface should be more than 200mm above the stator so that the insulating paint can completely penetrate into the pores and gaps of the coil winding in the stator. This process is slow and inefficient because it relies solely on the natural penetration of the insulating paint. Therefore, it is necessary to design a coil dipping equipment that can speed up the penetration of the insulating paint. An existing method is to directly add an insulating paint stirring structure in the paint bucket to stir the insulating paint, improve its fluidity, and impact the coil winding to increase the penetration speed of the insulating paint; this method is not effective, mainly because some windings on the stator are usually placed inside the stator, and the stirred insulating paint mostly directly impacts the outer surface of the stator, and only a small amount of insulating paint impacts the coil winding, and the stirring method mainly relies on components such as the stirring shaft. During the stirring process, some bubbles may be generated, resulting in the penetration of the insulating paint being hindered; in addition, in the process of immersing the stator into the paint bucket, a small amount of impurities on the stator will also enter the paint bucket. These impurities will be deposited at the bottom of the paint bucket during the immersion process. Directly stirring the insulating paint will cause these impurities to be continuously lifted up and attached to the coil along with the insulating paint. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcoming of slow natural penetration speed of insulating varnish in the prior art, and to propose a coil varnish dipping device for motor production.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A coil varnish dipping device for motor production is designed, comprising a paint bucket, wherein a plurality of outer cylinders are installed circumferentially through the bottom of the paint bucket, a conical cover is coaxially fixed to the top end of the outer cylinder, an inner cylinder is coaxially fixed in the outer cylinder, and the bottom end of the outer cylinder is sealed; a filter is arranged between the top end of the inner cylinder and the conical cover, the filter is in the shape of a conical cylinder, and the two ends of the filter are respectively coaxially rotatably connected to the conical cover and the inner cylinder, a liquid outlet is penetrated on the conical cover inside the filter, and a plurality of liquid inlets are penetrated on the conical cover outside the filter, and a one-way valve is installed on each of the liquid inlets.

[0006] A piston is coaxially telescopically installed in the inner cylinder, and both the piston and the filter are transmission-connected with the driving device, so that the piston can synchronously drive the piston to telescope and the filter to rotate.

[0007] Preferably, the driving device includes a plurality of first magnetic blocks, a plurality of electromagnets, a rotating shaft, and a transmission mechanism. A first magnetic block is fixed on each of the pistons. A rotating shaft is coaxially installed under the paint bucket, and a plurality of electromagnets are arranged around the rotating shaft. The electromagnets and the first magnetic blocks are arranged in a one-to-one correspondence, and the electromagnets and the first magnetic blocks attract each other. The piston is connected to the filter through a transmission mechanism.

[0008] Preferably, the transmission mechanism comprises a plurality of inclined tie rods, and a plurality of inclined tie rods are arranged between the piston and the filter around the central axis thereof, and both ends of the inclined tie rods are universally connected to the piston and the filter through a universal connector respectively.

[0009] Preferably, a plurality of cleaners are arranged on the outer surface of the filter around its central axis, the cleaners are arranged parallel to the sides of the filter as a whole, and the cleaners are fixedly connected to the inner cylinder.

[0010] Preferably, the cleaner comprises two vortex tubes, the cross-section of the vortex tubes is vortex-shaped, the two vortex tubes are parallel and symmetrical to each other, the two vortex tubes are fixedly connected, and the vortex inlets of the two vortex tubes are arranged in contact with the filter surface.

[0011] Preferably, a circular ring is coaxially arranged in the paint bucket above the conical cover, an annular cavity is coaxially opened in the circular ring, a plurality of through holes connected to the annular cavity are opened on the top of the circular ring, a plurality of conduits connected to the annular cavity are circumferentially arranged on the bottom of the circular ring, the conduits are arranged in a one-to-one correspondence with the conical cover, and the conduits are connected to the liquid outlets on the corresponding conical covers.

[0012] Preferably, a plurality of stator support plates are fixed in the paint bucket above the circular ring along the circumferential direction.

[0013] Preferably, a plurality of conical rings are arranged on the inner wall of the outer cylinder and the outer wall of the inner cylinder at intervals along the height direction, and the small-mouth ends of the conical rings are arranged toward the conical cover.

[0014] The present invention provides a coil varnishing device for motor production, which has the following beneficial effects:

[0015] By arranging a plurality of outer cylinders and conical covers at the bottom of the paint bucket that are distributed in an annular shape and can spray insulating paint upward, after the stator is placed in the paint bucket, the insulating paint at the bottom can flow upward in an annular shape, and the flowing insulating paint can directly impact the coils distributed in an annular shape on the corresponding stator, so that the speed at which the insulating paint penetrates into the gap of the coil winding is greatly improved, and since the insulating paint is sprayed out in the outer cylinder by means of a piston, few bubbles are generated, which will not hinder the penetration of the insulating paint;

[0016] By arranging a filtering structure consisting of an inner cylinder, a filter, a cleaner, etc. in an outer cylinder, on the one hand, the bottom insulating paint sucked in can be filtered through the filter and then sprayed onto the coil winding to prevent a small amount of impurities mixed in the paint bucket from being sprayed onto the coil winding; on the other hand, the rotatable filter driven by the piston is combined with the cleaner, and the two vortex tubes in the cleaner can be used to scoop up the impurities intercepted on the surface of the filter, and with the help of the vortex structure of the vortex tube, the scooped impurities can be introduced into the gap between the inner cylinder and the outer cylinder, thereby realizing automatic filtration of impurities in the paint and greatly improving the quality of the paint dipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a side structural schematic diagram of a coil varnishing equipment for motor production proposed by the present invention;

[0018] Figure 2 This is a schematic diagram of the top view of a coil varnishing device for motor production proposed by the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of a paint bucket of a coil varnishing equipment for motor production proposed by the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a driving device of a coil varnishing equipment for motor production proposed by the present invention;

[0021] Figure 5 This is a schematic diagram of the outer cylinder structure of a coil varnishing equipment for motor production proposed by the present invention;

[0022] Figure 6 This is a schematic diagram of the bottom structure of the outer cylinder of a coil varnishing equipment for motor production proposed by the present invention;

[0023] Figure 7 This is a schematic diagram of the internal structure of the outer cylinder and inner cylinder of a coil varnishing equipment for motor production proposed by the present invention;

[0024] Figure 8 A schematic diagram of the filter position of a coil varnishing equipment for motor production proposed by the present invention;

[0025] Fig. 9A schematic diagram of the position of a remover of a coil varnishing equipment for motor production proposed by the present invention;

[0026] Fig.10 A schematic diagram of the structure of a remover for a coil varnish dipping device for motor production proposed by the present invention;

[0027] Fig.11 A schematic diagram of the three-dimensional structure of a remover of a coil varnishing equipment for motor production proposed by the present invention;

[0028] Fig.12 A schematic diagram of the working principle of a remover of a coil varnishing equipment for motor production proposed by the present invention;

[0029] Fig.13 Schematic diagram of the state of a one-way valve of a coil varnishing equipment for motor production proposed by the present invention Figure 1 ;

[0030] Fig.14 Schematic diagram of the state of a one-way valve of a coil varnishing equipment for motor production proposed by the present invention Figure 2 ;

[0031] Fig.15 This is a schematic diagram of the internal structure of a circular ring of a coil varnishing equipment for motor production proposed by the present invention;

[0032] Fig.16 The present invention is a schematic diagram of the inclined rod structure of a coil varnishing equipment for motor production proposed by the present invention.

[0033] In the figure: 1. paint bucket; 2. socket; 3. outer cylinder; 4. conical cover; 5. inner cylinder; 6. drain pipe; 7. filter; 8. liquid outlet; 9. liquid inlet; 10. one-way valve; 11. piston; 12. first magnetic block; 13. electromagnet; 14. rotating shaft; 15. inclined rod; 16. remover; 17. circular ring; 18. through hole; 19. conduit; 20. stator support plate; 21. conical ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Reference Figure 1-8, 13-16, a coil varnishing equipment for motor production, comprising a paint bucket 1, a plurality of jacks 2 are circumferentially penetrated at the bottom of the paint bucket 1, an outer cylinder 3 is coaxially installed in each jack 2, a conical cover 4 is coaxially fixed to the top of the outer cylinder 3, an inner cylinder 5 is coaxially fixed in the outer cylinder 3, the bottom end of the outer cylinder 3 is sealed, a plurality of drain pipes 6 connected to the inside of the outer cylinder 3 are circumferentially arranged at the lower part of the outer cylinder 3, a sealing cover is installed on the drain pipe 6, when the sealing cover is opened, impurities between the inner cylinder 5 and the outer cylinder 3 will be discharged through the drain pipe 6; the top of the inner cylinder 5 is connected to the conical cover 4 A filter 7 is arranged between the conical cover 4, and the filter 7 is in the shape of a cone. The two ends of the filter 7 are respectively connected to the conical cover 4 and the inner cylinder 5 coaxially. A liquid outlet 8 is opened through the conical cover 4 inside the filter 7, and a plurality of liquid inlets 9 are opened through the conical cover 4 outside the filter 7. A one-way valve 10 is installed on each liquid inlet 9. The one-way valve 10 is used to prevent the liquid in the conical cover 4 from flowing out from the liquid inlet 9; the one-way valve 10 includes a diaphragm, which is arranged on the inner side of the liquid inlet 9, the diaphragm covers the liquid inlet 9, and the lower end of the diaphragm is fixedly connected to the conical cover 4. As shown in the attached Figure 13-14 As shown, when the external liquid flows into the conical cover 4 through the liquid inlet 9, the liquid will push open the diaphragm, and the upper end of the diaphragm will tilt inward, so that the liquid inlet 9 is opened, otherwise the diaphragm will adhere to and cover the liquid inlet 9. A one-way valve is installed at the liquid outlet 8, and the one-way valve is used to prevent the insulating paint from being sucked back into the conical cover 4.

[0036] A piston 11 is coaxially telescopically installed in the inner cylinder 5, and the piston 11 and the filter 7 are both transmission-connected with the driving device, so that the piston 11 can synchronously drive the piston 11 to telescope and the filter 7 to rotate.

[0037] The driving device includes a plurality of first magnetic blocks 12, a plurality of electromagnets 13, a rotating shaft 14, and a transmission mechanism. A first magnetic block 12 is fixed on each piston 11. A rotating shaft 14 is coaxially installed under the paint bucket 1. A plurality of electromagnets 13 are arranged around the rotating shaft 14. The electromagnets 13 and the first magnetic blocks 12 are arranged one by one, and the electromagnets 13 and the first magnetic blocks 12 attract each other. The piston 11 is connected to the filter 7 through the transmission mechanism. The rotating shaft 14 is driven by a motor. When the rotating shaft 14 rotates, the rotating shaft 14 synchronously drives the plurality of electromagnets 13 to make circular motion. Whenever an electromagnet 13 moves below the first magnetic block 12, the magnetic force between the two causes the first magnetic block 12 to drive the piston 11 to move downward.

[0038] The transmission mechanism includes a plurality of inclined tie rods 15, and a plurality of inclined tie rods 15 are arranged around the central axis of the piston 11 and the filter 7. The two ends of the inclined tie rods 15 are universally connected to the piston 11 and the filter 7 through a universal connector. When the piston 11 performs telescopic movement, the upper and lower ends of the inclined tie rods 15 are staggered, so that the piston 11 will synchronously pull the filter 7 to rotate through the plurality of inclined tie rods 15.

[0039] A circular ring 17 is coaxially arranged in the paint bucket 1 above the conical cover 4, and an annular cavity is coaxially arranged in the circular ring 17. A plurality of through holes 18 communicating with the annular cavity are arranged at the top of the circular ring 17, and a plurality of conduits 19 communicating with the annular cavity are circumferentially arranged at the bottom of the circular ring 17. The conduits 19 are arranged one by one corresponding to the conical cover 4, and the conduits 19 are connected to the liquid outlets 8 on the corresponding conical cover 4. The liquid sprayed from the conical cover 4 is further collected through the annular cavity in the circular ring 17, and finally sprayed to the stator in an annular shape and uniformly through the through holes 18 on the circular ring 17, so as to better cover the coils on the stator.

[0040] A plurality of stator support plates 20 are fixed circumferentially in the paint bucket 1 above the circular ring 17. After the stator is placed in the paint bucket 1, the stator bottom end and the circular ring 17 can be kept at a distance due to the support of the stator support plates 20.

[0041] A plurality of conical rings 21 are arranged at intervals along the height direction on the inner wall of the outer cylinder 3 and the outer wall of the inner cylinder 5, and the small ends of the conical rings 21 are arranged toward the conical cover 4. By arranging the conical rings 21, after impurities fall between the outer cylinder 3 and the inner cylinder 5, the conical rings 21 can be used to prevent the impurities that fall to the bottom from flowing back upward with the liquid, so that the impurities can be stably retained in the bottom space of the area between the outer cylinder 3 and the inner cylinder 5.

[0042] Example 2: Reference Figure 9-12 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that a plurality of cleaners 16 are arranged around the axis of the outer surface of the filter 7, and the cleaners 16 are arranged parallel to the sides of the filter 7 as a whole. The cleaners 16 are fixedly connected to the inner tube 5, and the cleaners 16 are used to remove impurities attached to the surface of the filter 7 when the filter 7 rotates.

[0043] The cleaner 16 includes two vortex tubes, the cross section of the vortex tubes is vortex-shaped, the two vortex tubes are parallel and symmetrical to each other, the two vortex tubes are fixedly connected, and the vortex inlets of the two vortex tubes are arranged in contact with the surface of the filter 7. Fig.12 As shown, when the filter 7 rotates, since the vortex tube is fixed, no matter whether the filter 7 rotates forward or reverse, the impurities attached to the surface of the filter 7 will be generated at the vortex inlet of the vortex tube, and follow the external liquid into the vortex tube. Since the vortex tube is vortex-shaped, the liquid carries the impurities and enters the center of the vortex tube in a spiral shape. Since the entire remover 16 is arranged parallel to the side of the filter 7, the vortex tube is inclined. The liquid entering the center of the vortex tube will flow downward along the vortex tube under the action of gravity, and finally flow to the area between the inner tube 5 and the outer tube 3, so as to prevent the scooped impurities from reattaching to the surface of the filter 7. The upper end of the vortex tube is sealed, so that the liquid in the vortex tube can only flow downward through the lower end opening of the vortex tube.

[0044] The overall workflow of the present invention is as follows:

[0045] After pouring the insulating paint into the paint bucket 1, the stator with the coil installed is vertically placed into the paint bucket 1, so that the insulating paint submerges the stator, and then stands for a period of time; then the rotating shaft 14 is started, and the rotating shaft 14 drives the multiple electromagnets 13 to make circular motions. Whenever an electromagnet 13 is aligned with a first magnetic block 12, the first magnetic block 12 will drive the piston 11 to move downward under the action of magnetic force. When the piston 11 moves downward, the one-way valve 10 at the liquid inlet 9 on the conical cover 4 opens, which will make the insulating paint in the paint bucket 1 enter the conical cover 4 from the liquid inlet 9, and enter the inside of the filter 7 after being filtered by the filter 7; when the electromagnetic When the iron 13 is offset from the first magnetic block 12, the piston 11 automatically resets upward. At this time, the one-way valve 10 at the liquid inlet 9 on the conical cover 4 is closed, and the piston 11 squeezes the insulating paint in the filter 7 toward the liquid outlet 8 on the conical cover 4. The insulating paint is input into the ring 17 at a relatively fast speed through the liquid outlet 8, and finally sprayed to the bottom of the stator through the multiple through holes 18 on the ring 17. The insulating paint sprayed from the through holes 18 at a relatively fast speed impacts the coil on the stator, so that the insulating paint can quickly fill the gap in the coil, and quickly bring the bubbles in the coil to the top of the paint bucket 1, which greatly improves the paint dipping effect.

[0046] In the above process, when the piston 11 moves downward and the insulating paint at the bottom of the paint bucket 1 is sucked in through the liquid inlet 9, some impurities at the bottom of the paint bucket 1 may be sucked into the conical cover 4. At this time, the filter 7 intercepts the impurities, and the intercepted impurities adhere to the filter 7; when the piston 11 moves upward, most of the insulating paint in the filter 7 will be squeezed toward the liquid outlet, and part of the insulating paint will rebound toward the filter 7, forming a reverse flow of insulating paint. At this time, since the one-way valve on the liquid inlet 9 is closed, this insulating paint will flow toward the area between the inner cylinder 5 and the outer cylinder 3 below. At the same time, the impurities attached to the surface of the filter 7 rotating under the drive of the piston 11 will be shoveled away by the remover 16; as shown in the attached Fig.12As shown, when the filter 7 rotates, since the vortex tube of the cleaner 16 is fixed, no matter whether the filter 7 rotates forward or reversely, the vortex inlet of the vortex tube will scoop up the impurities attached to the surface of the filter 7 and make it follow the external liquid into the vortex tube. Since the vortex tube is vortex-shaped, the liquid carries the impurities into the center of the vortex tube in a spiral shape, and the vortex tube is inclined and sealed at the upper end. The liquid entering the center of the vortex tube will flow downward along the vortex tube under the action of gravity. In this way, when the piston 11 moves upward, the insulating paint flowing out of the filter 7 in the reverse direction also flows toward the area between the inner cylinder 5 and the outer cylinder 3 below. The two liquids merge in the same direction and finally flow downward to the area between the inner cylinder 5 and the outer cylinder 3. In this way, the scooped impurities can be prevented from being re-attached to the surface of the filter 7; finally, the operator only needs to open the drain pipe 6 regularly to discharge the impurities gathered at the bottom between the inner cylinder 5 and the outer cylinder 3, thereby realizing the self-cleaning of the filter 7.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coil varnishing device for motor production, comprising a varnishing bucket (1), characterized in that: A plurality of outer cylinders (3) are installed through the bottom of the paint bucket (1) along the circumferential direction, a conical cover (4) is coaxially fixed to the top of the outer cylinder (3), an inner cylinder (5) is coaxially fixed in the outer cylinder (3), and the bottom end of the outer cylinder (3) is sealed; a filter (7) is arranged between the top of the inner cylinder (5) and the conical cover (4), the filter (7) is in the shape of a conical cylinder, and the two ends of the filter (7) are respectively coaxially rotatably connected to the conical cover (4) and the inner cylinder (5); a liquid outlet (8) is opened through the conical cover (4) inside the filter (7), and a plurality of liquid inlets (9) are opened through the conical cover (4) outside the filter (7), and each of the liquid inlets (9) is installed with a one-way valve (10); a piston (11) is coaxially telescopically installed in the inner cylinder (5), and the piston (11) and the filter (7) are both transmission-connected to a driving device, so that the piston (11) can synchronously drive the piston (11) to telescope and the filter (7) to rotate; A plurality of scavengers (16) are arranged on the outer surface of the filter (7) around its central axis. The scavengers (16) are arranged as a whole parallel to the side of the filter (7). The scavengers (16) are fixedly connected to the inner cylinder (5). The scavengers (16) include two vortex tubes. The cross-section of the vortex tubes is vortex-shaped. The upper ends of the two vortex tubes are sealed. The two vortex tubes are parallel and symmetrical to each other. The two vortex tubes are fixedly connected, and the vortex inlets of the two vortex tubes are arranged in contact with the surface of the filter (7).

2. The coil varnishing equipment for motor production according to claim 1, characterized in that: The driving device comprises a plurality of first magnetic blocks (12), a plurality of electromagnets (13), a rotating shaft (14), and a transmission mechanism. A first magnetic block (12) is fixed to each of the pistons (11). A rotating shaft (14) is coaxially rotatably mounted below the paint bucket (1). A plurality of electromagnets (13) are arranged around the rotating shaft (14). The electromagnets (13) and the first magnetic blocks (12) are arranged in a one-to-one correspondence. The electromagnets (13) and the first magnetic blocks (12) attract each other. The pistons (11) are connected to the filter (7) via the transmission mechanism.

3. The coil varnishing equipment for motor production according to claim 2, characterized in that: The transmission mechanism comprises a plurality of inclined tie rods (15), wherein the plurality of inclined tie rods (15) are arranged between the piston (11) and the filter (7) around their central axes, and the two ends of the inclined tie rods (15) are universally connected to the piston (11) and the filter (7) via a universal connector.

4. The coil varnishing equipment for motor production according to claim 1, characterized in that: A circular ring (17) is coaxially arranged in the paint bucket (1) above the conical cover (4), an annular cavity is coaxially provided in the circular ring (17), a plurality of through holes (18) communicating with the annular cavity are provided at the top of the circular ring (17), a plurality of conduits (19) communicating with the annular cavity are circumferentially arranged at the bottom of the circular ring (17), the conduits (19) being arranged in one-to-one correspondence with the conical cover (4), and the conduits (19) are connected to the liquid outlets (8) on the corresponding conical covers (4).

5. The coil varnishing equipment for motor production according to claim 4, characterized in that: A plurality of stator support plates (20) are fixed in the paint bucket (1) above the circular ring (17) along the circumferential direction.

6. The coil varnishing equipment for motor production according to claim 1, characterized in that: A plurality of conical rings (21) are arranged at intervals along the height direction on the inner wall of the outer cylinder (3) and the outer wall of the inner cylinder (5), and the small openings of the conical rings (21) are arranged toward the conical cover (4).

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