Insulating paint dipping device for motor stator winding

Abstract

The invention discloses a motor stator winding insulating paint dipping device, and belongs to the field of motor stator winding processing. A motor stator winding insulating paint dipping device comprises a paint dipping tank and further comprises a vacuum pipe arranged on one side of the paint dipping tank; the controller is fixedly arranged on one side of the paint dipping tank; the sealing cover is arranged on the upper side of the paint dipping tank, and the sealing cover is connected with the paint dipping tank in a sealing manner; the lifting plate is arranged in the paint dipping tank in a sliding manner; the hydraulic cylinder is fixedly arranged on the sealing cover, and the output end of the hydraulic cylinder is connected with a lifting plate; according to the invention, paint dipping operation is carried out in a mode of alternate cooperation of soaking and pouring, so that small bubbles immersed in insulating paint in the stator winding can be conveniently broken and separated out, and the bubbles in the insulating paint can be removed, thereby effectively improving the paint dipping effect and paint dipping efficiency of the stator winding.

Description

Technical Field

[0001] The invention relates to the technical field of motor stator winding processing, in particular to a motor stator winding insulating varnish dipping device. Background Art

[0002] In the field of motor manufacturing, the insulation treatment of the stator winding is a key link in ensuring the performance and service life of the motor. The insulating varnish dipping process can effectively prevent the winding short circuit and improve the motor's corona resistance by forming a dense insulating layer on the surface of the stator winding. It plays a decisive role in the safety and stability of the motor operation. As the motor industry develops towards high power density and high reliability, higher requirements are placed on the quality of the stator winding dipping.

[0003] Traditional motor stator winding insulation paint dipping methods mostly use normal pressure immersion or simple paint dripping operation. During the normal pressure immersion process, due to the air resistance formed in the stator winding gap, the insulating paint is difficult to fully penetrate deep into the winding, resulting in incomplete immersion and prone to insulation weak points. In addition, the immersion method will cause more bubbles in the insulating paint, and the bubbles may re-enter the stator winding, affecting its immersion effect and efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a motor stator winding insulating varnish dipping device that can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A device for dipping a motor stator winding in insulating varnish comprises: a dipping tank, and also comprises: a vacuum tube, arranged on one side of the dipping tank; a controller, fixedly arranged on one side of the dipping tank; a sealing cover, arranged on the upper side of the dipping tank, and the sealing cover is sealed and connected to the dipping tank; a lifting plate, slidably arranged in the dipping tank; a hydraulic cylinder, fixedly arranged on the sealing cover, and the output end of the hydraulic cylinder is connected to the lifting plate; a plurality of placement racks, arranged on the upper side of the lifting plate, and the placement racks are used to place the motor stator; a fixing assembly, arranged on the placement rack, and the fixing assembly is used to fix the motor stator; a central shaft, fixedly arranged on the placement rack, and a liquid storage hopper is provided at the upper end of the central shaft, and a mounting shaft corresponding to the central shaft is provided at the lower end of the liquid storage hopper; a plurality of liquid outlet pipes, circumferentially arranged around the liquid storage hopper.

[0006] In order to facilitate the pouring of the stator winding and the discharge of bubbles inside the insulating varnish, a guide platform is fixedly connected to the outer side of the liquid storage hopper, and the guide platform corresponds to the liquid outlet pipe.

[0007] In order to facilitate the rotation of the lifting plate and allow the insulating paint to better enter the stator winding gap, preferably, a mounting sleeve is fixedly connected between the lifting plate and the hydraulic cylinder, a first motor is fixedly connected inside the mounting sleeve, and the output end of the first motor is fixedly connected to the lifting plate.

[0008] In order to facilitate the rotation of the motor stator, the lifting plate is further provided with a plurality of mounting slots, a supporting plate is provided in the mounting slot, a rotating plate is rotatably provided on the upper side of the supporting plate, the rotating plate is fixedly connected to the placement frame, a DD hollow motor is fixedly connected in the supporting plate, and the output end of the DD hollow motor is fixedly connected to the rotating plate.

[0009] In order to facilitate the removal of bubbles in the insulating varnish, further, a first frustum is fixedly connected to the lower end of the rotating plate, and a plurality of communication openings are circumferentially arranged on the rotating plate, and the communication openings correspond to the first frustum.

[0010] In order to facilitate the flow of insulating varnish from the lower side to the side of the stator winding, the supporting plate is further arranged concentrically with the mounting groove, and the diameter of the supporting plate is smaller than the diameter of the mounting groove. A first sealing plate is symmetrically fixedly connected between the mounting groove and the supporting plate. A rotating shaft is symmetrically fixedly connected on both sides of the supporting plate, and the rotating shaft is rotatably arranged in the mounting groove. A damper corresponding to the rotating shaft is arranged in the mounting groove, and a plurality of tension springs are circumferentially fixedly connected between the supporting plate and the mounting groove.

[0011] In order to facilitate the penetration of insulating paint into the stator winding gap, an outer barrel body is further provided on the outside of the central axis, a second sealing sheet is symmetrically fixedly connected between the outer barrel body and the central axis, a vibration motor is fixedly connected to the central axis, and the output end of the vibration motor is connected to the outer barrel body.

[0012] Preferably, the fixing assembly includes a plurality of connecting arms fixedly connected to the placement rack, and the connecting arms are fixedly connected to electric telescopic rods.

[0013] In order to increase the pressure of the insulating paint on the stator winding, the inner wall of the paint dipping tank is further provided with a barrel wall, a transition surface and a sealing surface in sequence. When the lifting plate contacts the sealing surface, the lifting plate is sealed and slidably connected with the sealing surface.

[0014] In order to facilitate the detection of the paint dipping condition of the stator winding, an air pressure sensor is further fixedly connected inside the sealing cover.

[0015] Compared with the prior art, the present invention provides a device for impregnating motor stator windings with insulating varnish, which has the following beneficial effects: 1. The motor stator winding insulating paint dipping device first controls the hydraulic cylinder to start through the controller, and the hydraulic cylinder drives the lifting plate to descend, and the stator is completely immersed in the insulating paint for dipping. After the specified dipping time, the hydraulic cylinder drives the lifting plate to rise, so that the stator is away from the insulating paint liquid surface. At this time, under vacuum conditions, it is convenient for small bubbles immersed in the insulating paint inside the stator winding to burst and precipitate, thereby effectively improving its dipping effect. At the same time, when the lifting plate moves upward, the insulating paint inside the liquid storage hopper flows out through the liquid outlet pipe and is guided by the guide table to be poured on the stator winding. On the one hand, it is convenient for the insulating paint to be immersed in the stator winding gap. On the other hand, the insulating paint flowing on the guide table is in a thin layer state, and combined with the vacuum condition, the bubbles inside the insulating paint are burst, thereby effectively improving the subsequent dipping effect.

[0016] 2. The motor stator winding insulating varnish dipping device controls the DD hollow motor to start through the controller. The DD hollow motor drives the rotating plate to rotate. Since the rotating plate is fixedly connected to the placement frame, the motor stator on the placement frame will also rotate accordingly. At this time, the stator winding on the stator can be evenly pressed into contact with the insulating varnish, thereby improving the uniformity of its dipping.

[0017] 3. The motor stator winding insulating varnish dipping device, when the lifting plate rotates, the supporting plate on which the motor stator is placed tilts its end outward under the action of centrifugal force. At this time, the motor stator is also in a tilted state, thereby facilitating the insulating varnish in the stator winding gap to flow from bottom to top, filling the internal gap and discharging bubbles from the upper end. On the one hand, it effectively improves the stator winding dipping effect, and on the other hand, it facilitates the discharge of bubbles inside the stator winding gap.

[0018] The parts not involved in this device are the same as those in the prior art or can be implemented using the prior art. The present invention uses an alternating method of immersion and pouring to perform the paint dipping operation, which facilitates the rupture and precipitation of small bubbles immersed in the insulating paint inside the stator winding, and can remove the bubbles in the insulating paint, thereby effectively improving the paint dipping effect and paint dipping efficiency of the stator winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a motor stator winding insulation varnish dipping device proposed by the present invention; Figure 2 This is a cross-sectional schematic diagram of a device for dipping motor stator windings into insulating varnish according to the present invention; Figure 3 The present invention proposes a motor stator winding insulation paint dipping device Figure 2 A magnified schematic diagram of point A in the middle; Figure 4 This is a structural schematic diagram of a lifting plate in a motor stator winding insulation varnish dipping device proposed by the present invention; Figure 5 This is a partial structural diagram of a motor stator winding insulation varnish dipping device proposed by the present invention; Figure 6 This is a schematic diagram of the expanded structure of the liquid storage hopper, rotating plate, bearing plate, central axis, outer barrel and first cone in the motor stator winding insulation varnish dipping device proposed by the present invention; Figure 7 The present invention proposes a motor stator winding insulation paint dipping device Figure 6 Enlarged schematic diagram of point B in the middle.

[0020] In the figure: 1. Paint dipping tank; 101. Controller; 102. Vacuum tube; 103. Sealing surface; 104. Transition surface; 105. Barrel wall; 2. Sealing cover; 201. Air pressure sensor; 202. Hydraulic cylinder; 203. Mounting sleeve; 204. First motor; 3. Lifting plate; 301. Mounting slot; 4. Loading plate; 401. First sealing plate; 402. DD hollow motor; 403. Rotating shaft; 404. Tension spring; 405. Rotating plate; 406. First cone; 407. Placement rack; 408. Connecting port; 409. Connecting arm; 410. Electric telescopic rod; 5. Central axis; 501. Outer barrel; 502. Second sealing plate; 503. Vibrating motor; 504. Liquid storage hopper; 505. Mounting axis; 506. Liquid outlet pipe; 507. Guide platform. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Reference Figure 1-Figure 7 , a motor stator winding insulating paint dipping device, comprising: a paint dipping tank 1, and also comprising: a vacuum tube 102, arranged on one side of the paint dipping tank 1; a controller 101, fixedly arranged on one side of the paint dipping tank 1; a sealing cover 2, arranged on the upper side of the paint dipping tank 1, and the sealing cover 2 is sealed and connected to the paint dipping tank 1; a lifting plate 3, slidingly arranged in the paint dipping tank 1; a hydraulic cylinder 202, fixedly arranged on the sealing cover 2, and the output end of the hydraulic cylinder 202 is connected to the lifting plate 3; a plurality of placement racks 407, arranged on the upper side of the lifting plate 3, and the placement racks 407 are used to place the motor stator; a fixing component, arranged on the placement rack 407, and the fixing component is used to fix the motor stator; a central shaft 5, fixedly arranged on the placement rack 407, and a liquid storage bucket 504 is provided at the upper end of the central shaft 5, and a mounting shaft 505 corresponding to the central shaft 5 is provided at the lower end of the liquid storage bucket 504; a plurality of liquid outlet pipes 506, which are circumferentially opened around the liquid storage bucket 504.

[0023] The outer side of the liquid storage hopper 504 is fixedly connected with a guide platform 507 , which corresponds to the liquid outlet pipe 506 .

[0024] When the motor stator winding is dipped in insulating paint, the motor stator with the winding is placed on the placement rack 407, and then the liquid storage hopper 504 with the guide platform 507 is installed on the central shaft 5. The stator is fixed by the fixing assembly, and then the sealing cover 2 is covered. The controller 101 controls the operation of the external vacuum pump, and the vacuum pump vacuums the dip tank 1 through the vacuum tube 102. The stator winding on the stator is dipped in the insulating paint pre-added in the dip tank 1. In actual operation, the hydraulic cylinder 202 is first controlled by the controller 101 to start, and the hydraulic cylinder 202 drives the lifting plate 3 to descend, so that the stator is completely immersed in the insulating paint for dipping. After the specified time of immersion, the lifting plate 3 is driven to rise by the hydraulic cylinder 202, so that the stator is away from the insulating paint liquid surface. At this time, under vacuum conditions, it is convenient for small bubbles immersed in the insulating paint inside the stator winding to burst and precipitate, thereby effectively improving its immersion effect. At the same time, when the lifting plate 3 moves upward, the insulating paint inside the liquid storage bucket 504 flows out through the liquid outlet pipe 506 and is guided by the guide platform 507 to be poured on the stator winding. On the one hand, it is convenient for the insulating paint to be immersed in the gap of the stator winding. On the other hand, the insulating paint flowing on the guide platform 507 is in a thin layer state. Combined with the vacuum condition, the bubbles inside the insulating paint are burst, thereby effectively improving the subsequent immersion effect.

[0025] After a specified time has passed since the lifting plate 3 was raised, the hydraulic cylinder 202 drives the lifting plate 3 to move downward again to perform a cyclic varnishing operation, thereby effectively improving the varnishing quality.

[0026] Example 2: Reference Figure 1-Figure 7 , a motor stator winding insulating varnish dipping device is basically the same as Example 1, further, a mounting sleeve 203 is fixedly connected between the lifting plate 3 and the hydraulic cylinder 202, a first motor 204 is fixedly connected inside the mounting sleeve 203, and the output end of the first motor 204 is fixedly connected to the lifting plate 3.

[0027] The controller 101 controls the first motor 204 to start, and the first motor 204 drives the lifting plate 3 to rotate, so that the motor stator placed on the lifting plate 3 also rotates. At this time, the rotating stator can increase the pressure of contact with the insulating paint, making it easier for the insulating paint to penetrate into the gaps of the motor stator windings, thereby effectively improving the paint immersion effect of the stator windings and preventing gaps inside them from being unpainted.

[0028] A plurality of mounting grooves 301 are provided on the lifting plate 3, a supporting plate 4 is provided in the mounting groove 301, a rotating plate 405 is rotatably provided on the upper side of the supporting plate 4, the rotating plate 405 is fixedly connected to the placement rack 407, a DD hollow motor 402 is fixedly connected in the supporting plate 4, and the output end of the DD hollow motor 402 is fixedly connected to the rotating plate 405.

[0029] The controller 101 controls the DD hollow motor 402 to start, and the DD hollow motor 402 drives the rotating plate 405 to rotate. Since the rotating plate 405 is fixedly connected to the placement rack 407, the motor stator on the placement rack 407 will also rotate accordingly. At this time, the stator winding on the stator can be evenly pressed into contact with the insulating paint, thereby improving the uniformity of its paint immersion.

[0030] The lower end of the rotating plate 405 is fixedly connected to a first frustum 406 . A plurality of communication openings 408 are circumferentially provided on the rotating plate 405 , and the communication openings 408 correspond to the first frustum 406 .

[0031] Part of the insulating varnish on the lifting plate 3 and the rotating plate 405 will flow onto the first cone 406 through the connecting port 408. The inclined surface of the first cone 406 will guide the insulating varnish to disperse and flow around, making the insulating varnish in a thin layer state, thereby effectively improving the effect of removing bubbles in the insulating varnish.

[0032] Example 3: Reference Figure 1-Figure 7 , a device for impregnating a motor stator winding with insulating varnish, which is basically the same as Example 1, further comprising: a supporting plate 4 and a mounting groove 301 are arranged concentrically, and the diameter of the supporting plate 4 is smaller than the diameter of the mounting groove 301; a first sealing sheet 401 is symmetrically fixedly connected between the mounting groove 301 and the supporting plate 4; a rotating shaft 403 is symmetrically fixedly connected on both sides of the supporting plate 4, and the rotating shaft 403 is rotatably arranged in the mounting groove 301; a damper corresponding to the rotating shaft 403 is arranged in the mounting groove 301; a plurality of tension springs 404 are circumferentially fixedly connected between the supporting plate 4 and the mounting groove 301.

[0033] When the lifting plate 3 rotates, the supporting plate 4 on which the motor stator is placed tilts its end outward under the action of centrifugal force. At this time, the motor stator is also tilted, which facilitates the insulating paint in the stator winding gap to flow from bottom to top, filling the internal gap and discharging the bubbles from the upper end. On the one hand, it effectively improves the effect of stator winding varnish dipping, and on the other hand, it facilitates the discharge of bubbles inside the stator winding gap.

[0034] Example 4: Reference Figure 1-Figure 7, a motor stator winding insulating varnish dipping device is basically the same as Example 1, and further, an outer barrel body 501 is provided on the outside of the central shaft 5, a second sealing sheet 502 is symmetrically fixedly connected between the outer barrel body 501 and the central shaft 5, a vibration motor 503 is fixedly connected to the central shaft 5, and the output end of the vibration motor 503 is connected to the outer barrel body 501.

[0035] The controller 101 controls the vibration motor 503 to start, and the vibration motor 503 drives the outer barrel 501 to vibrate. The vibration of the outer barrel 501 facilitates the insulating varnish to better penetrate into the gap of the stator winding, thereby improving the filling effect of the insulating varnish.

[0036] Example 5: Reference Figure 1-Figure 7 A device for dipping insulating varnish into motor stator windings is basically the same as that in Example 1, and further, the fixing assembly includes a plurality of connecting arms 409 fixedly connected to a placement rack 407, and an electric telescopic rod 410 is fixedly connected to the connecting arm 409.

[0037] When the motor stator is placed on the placement rack 407, the controller 101 controls the electric telescopic rod 410 to extend, and the end of the electric telescopic rod 410 presses against the motor stator to fix it on the placement rack 407. On the one hand, it can ensure the concentricity of the motor stator and the central axis 5, which is convenient for subsequent paint dipping operations, and on the other hand, it can prevent the motor stator from shifting during the paint dipping process.

[0038] The inner wall of the paint dipping tank 1 is sequentially provided with a barrel wall 105 , a transition surface 104 and a sealing surface 103 . When the lifting plate 3 contacts the sealing surface 103 , the lifting plate 3 and the sealing surface 103 are sealed and slidably connected.

[0039] When the lifting plate 3 descends to contact the sealing surface 103, a relatively sealed space is formed. At this time, the insulating paint at the bottom of the paint dipping tank 1 is sprayed toward the center of the motor stator through the connecting port 408 under the action of pressure. At this time, the sprayed insulating paint has a certain pressure, which facilitates the insulating paint to penetrate into the gap of the stator winding. By coordinating multiple paint dipping methods, the paint dipping efficiency is effectively improved.

[0040] An air pressure sensor 201 is fixedly connected inside the sealing cover 2 .

[0041] The air pressure sensor 201 monitors the air pressure in the paint immersion tank 1 in real time and transmits the air pressure data to the controller 101. The controller 101 determines the vacuum degree in the paint immersion tank 1 based on the air pressure data. Each time the lifting plate 3 rises to the specified position and before it descends, the controller 101 analyzes the air pressure data in this process. When the vacuum degree decreases by more than the set value, the paint immersion cycle operation continues. When the vacuum degree decreases by less than the set value, it proves that the gap in the motor stator winding meets the standard. At this time, the lifting plate 3 is no longer driven to descend, and the paint immersion operation is completed. Then, the excess insulating paint is allowed to drip naturally, and finally it is dried.

[0042] In practical applications, in order to maintain the fluidity of the insulating varnish, a heating wire may be provided on the inner wall of the varnish dipping tank 1 to heat the varnish so as to maintain the varnish within a specified temperature range.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for impregnating motor stator windings with insulating varnish, comprising: The paint dipping tank (1) is characterized in that it further comprises: A vacuum tube (102) is provided on one side of the paint dipping tank (1); A controller (101) is fixedly arranged on one side of the paint dipping tank (1); A sealing cover (2) is arranged on the upper side of the paint dipping tank (1), and the sealing cover (2) is sealedly connected to the paint dipping tank (1); A lifting plate (3) is slidably arranged in the paint dipping tank (1); A hydraulic cylinder (202) is fixedly arranged on the sealing cover (2), and an output end of the hydraulic cylinder (202) is connected to the lifting plate (3); A plurality of placement racks (407) are arranged on the upper side of the lifting plate (3), and the placement racks (407) are used to place motor stators; A fixing component is arranged on the placement rack (407), and the fixing component is used to fix the motor stator; A central shaft (5) is fixedly arranged on the placement frame (407), and a liquid storage hopper (504) is provided at the upper end of the central shaft (5), and a mounting shaft (505) corresponding to the central shaft (5) is provided at the lower end of the liquid storage hopper (504); A plurality of liquid outlet pipes (506) are arranged in a circular pattern around the liquid storage hopper (504).

2. The device for impregnating motor stator windings with insulating varnish according to claim 1, characterized in that: A guide platform (507) is fixedly connected to the outside of the liquid storage hopper (504), and the guide platform (507) corresponds to the liquid outlet pipe (506).

3. The device for impregnating motor stator winding with insulating varnish according to claim 1, characterized in that: A mounting sleeve (203) is fixedly connected between the lifting plate (3) and the hydraulic cylinder (202), a first motor (204) is fixedly connected inside the mounting sleeve (203), and an output end of the first motor (204) is fixedly connected to the lifting plate (3).

4. The device for impregnating motor stator windings with insulating varnish according to claim 3, characterized in that: The lifting plate (3) is provided with a plurality of mounting grooves (301), a supporting plate (4) is provided in the mounting grooves (301), a rotating plate (405) is rotatably provided on the upper side of the supporting plate (4), the rotating plate (405) is fixedly connected to the placement frame (407), a DD hollow motor (402) is fixedly connected in the supporting plate (4), and an output end of the DD hollow motor (402) is fixedly connected to the rotating plate (405).

5. The device for impregnating motor stator windings with insulating varnish according to claim 4, characterized in that: The lower end of the rotating plate (405) is fixedly connected to a first frustum (406), and a plurality of communication openings (408) are circumferentially arranged on the rotating plate (405), and the communication openings (408) correspond to the first frustum (406).

6. The device for impregnating motor stator windings with insulating varnish according to claim 4, characterized in that: The bearing plate (4) is concentrically arranged with the mounting groove (301), and the diameter of the bearing plate (4) is smaller than the diameter of the mounting groove (301). A first sealing sheet (401) is symmetrically fixedly connected between the mounting groove (301) and the bearing plate (4). Rotating shafts (403) are symmetrically fixedly connected on both sides of the bearing plate (4), and the rotating shafts (403) are rotatably arranged in the mounting groove (301). A damper corresponding to the rotating shaft (403) is arranged in the mounting groove (301). A plurality of tension springs (404) are circumferentially fixedly connected between the bearing plate (4) and the mounting groove (301).

7. The device for impregnating motor stator windings with insulating varnish according to claim 1, characterized in that: An outer barrel (501) is provided on the outside of the central shaft (5), a second sealing sheet (502) is symmetrically fixedly connected between the outer barrel (501) and the central shaft (5), a vibration motor (503) is fixedly connected to the central shaft (5), and an output end of the vibration motor (503) is connected to the outer barrel (501).

8. The device for impregnating motor stator windings with insulating varnish according to claim 1, characterized in that: The fixing assembly comprises a plurality of connecting arms (409) fixedly connected to the placement frame (407), and an electric telescopic rod (410) is fixedly connected to the connecting arms (409).

9. The device for impregnating motor stator windings with insulating varnish according to claim 5, characterized in that: The inner wall of the paint dipping tank (1) is provided with a barrel wall (105), a transition surface (104) and a sealing surface (103) in sequence. When the lifting plate (3) contacts the sealing surface (103), the lifting plate (3) and the sealing surface (103) are sealed and slidably connected.

10. The device for impregnating motor stator windings with insulating varnish according to claim 1, characterized in that: An air pressure sensor (201) is fixedly connected inside the sealing cover (2).

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