Permanent magnet motor self-circulation vacuum pressure paint dipping tool

Abstract

The utility model discloses a self-circulation vacuum pressure paint dipping tool for a permanent magnet motor, and relates to the technical field of motor manufacturing. Comprising a paint dipping tool seat, the lower portion of the outer wall of the paint dipping tool seat is provided with a circle of supporting plate, the supporting plate is connected with the bottom of a motor shell, and paint inlet and return through holes are formed in the supporting plate; the paint dipping tool top cover is provided with an inner ring fastening hole and an outer ring fastening hole, the inner ring fastening hole is connected with the top plate of the paint dipping tool seat through a fastening bolt, and the outer ring fastening hole is connected with the top of the motor shell through a fastening bolt; and the paint storage tank is connected with the paint inlet and return through hole. The tool is used for sealing the motor shell so as to form a closed cavity, and vacuum pumping and pressure paint dipping are achieved without depending on a vacuum tank. According to the tool, the size of a closed space is greatly reduced, the utilization rate of insulating paint is increased, deformation of the motor shell in the paint dipping process is avoided, and the whole process of automatic vacuumizing, pressurizing, pressure maintaining and paint returning of the motor shell can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a self-circulating vacuum pressure dipping paint tool for a permanent magnet motor. Background Art

[0002] Vacuum pressure dipping is a process that applies insulating paint to the surface of the stator coil and penetrates into the internal gaps under vacuum and pressure. Compared with general dipping technology, the main advantages are uniform and dense paint film, strong adhesion, and better insulation performance of the coil after dipping. The vacuum tank is the main equipment for vacuuming, painting, and pressure dipping of the stator coil.

[0003] The existing dipping method is to put the stator part into a vacuum tank, evacuate the stator coil and perform pressure dipping in the vacuum tank. For high-power motors, the shell size is relatively large. When the size of the shell with winding exceeds the space of the vacuum tank, the vacuum pressure dipping process cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a permanent magnet motor self-circulation vacuum pressure dipping tooling, which uses the tooling to seal the motor housing, greatly reducing the size of the enclosed space, increasing the utilization rate of the insulating paint, avoiding deformation of the motor housing during the dipping process, and achieving vacuum extraction and pressure dipping without relying on a vacuum tank.

[0005] To achieve the above purpose, the present application proposes a permanent magnet motor self-circulation vacuum pressure impregnation tooling, comprising:

[0006] The paint dipping fixture seat has a circle of support plates at the lower part of its outer wall, which is connected to the bottom of the motor housing and has paint inlet and outlet holes;

[0007] The top cover of the paint dipping tool has an inner ring fastening hole and an outer ring fastening hole, wherein the inner ring fastening hole is connected to the top plate of the paint dipping tool seat through a fastening bolt, and the outer ring fastening hole is connected to the top of the motor housing through a fastening bolt;

[0008] The paint storage tank is connected to the paint inlet and return holes.

[0009] Furthermore, a three-way pipeline is welded on the top cover of the paint dipping tooling for installing a vacuum pressure gauge and a pressure relief valve.

[0010] Furthermore, a multi-way pipeline is welded on the top cover of the paint dipping tooling for installing a safety valve, an air compressor and a buffer tank, and the buffer tank is connected to a vacuum pump.

[0011] Furthermore, a closed cavity is formed between the paint dipping tool seat, the paint dipping tool top cover and the motor housing, and the motor stator is placed in the closed cavity.

[0012] Furthermore, a bottom sealing groove is formed on the support plate, and a bottom sealing strip is placed in the bottom sealing groove to achieve sealing between the paint dipping fixture seat and the motor housing.

[0013] Furthermore, a first top sealing groove and a second top sealing groove are formed on the top cover of the painting tooling, and a first top sealing strip is placed in the first top sealing groove to achieve sealing between the top cover of the painting tooling and the motor housing; a second top sealing strip is placed in the second top sealing groove to achieve sealing between the top cover of the painting tooling and the painting tooling seat.

[0014] Furthermore, the paint storage tank is connected to the paint inlet and return through hole through a paint inlet and return pipeline, and a paint inlet and return valve is provided on the paint inlet and return pipeline.

[0015] Furthermore, a pressure valve is provided between the air compressor and the multi-way pipeline.

[0016] Furthermore, a vacuum valve is provided between the buffer tank and the multi-way pipeline.

[0017] Furthermore, a reinforcing angle plate is provided between the top plate and the inner wall of the paint dipping fixture seat; and a reinforcing plate is provided on the inner wall of the paint dipping fixture seat.

[0018] Compared with the prior art, the above technical solution adopted by the utility model has the advantages that the motor housing is sealed by the tooling to form a closed cavity, and vacuuming and pressure dipping are achieved without relying on a vacuum tank. The tooling greatly reduces the size of the closed space, increases the utilization rate of the insulating paint, avoids deformation of the motor housing during the dipping process, and can realize the entire process of self-vacuuming, pressurizing, maintaining pressure, and repainting of the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the permanent magnet motor self-circulation vacuum pressure dipping paint tooling;

[0020] Figure 2 It is a partial cross-sectional view of the permanent magnet motor self-circulation vacuum pressure dipping paint fixture;

[0021] Figure 3 This is an enlarged schematic diagram of the sealing part of the top cover of the varnishing tooling;

[0022] Figure 4 This is a partial enlarged view of the paint dipping fixture seat;

[0023] Among them: 1. stator, 2. motor housing, 3. top cover of paint dipping tooling, 4. paint dipping tooling seat, 51. vacuum pressure gauge, 52. pressure relief valve, 6. safety valve, 71. paint storage tank, 72. paint inlet and return valve, 81. air compressor, 82. pressurizing valve, 91. vacuum pump, 92. buffer tank, 93. vacuum valve. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0027] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Please refer to 1- Figure 4 This embodiment provides a permanent magnet motor self-circulation vacuum pressure impregnation tooling, including:

[0030] The paint dipping fixture seat is a hollow structure used to reduce the paint dipping space; a circle of support plates is provided at the lower part of its outer wall, the support plate has fastening holes, is connected to the bottom of the motor housing through fastening bolts, and has paint inlet and return holes 44; a three-way pipeline and a multi-way pipeline are welded on the top cover of the paint dipping fixture, wherein the three-way pipeline is used to install a vacuum pressure gauge and a pressure relief valve, and the multi-way pipeline is used to install a safety valve, an air compressor and a buffer tank, and the buffer tank is connected to the vacuum pump.

[0031] The top cover of the paint dipping tool has an inner ring fastening hole 33 and an outer ring fastening hole 34, wherein the inner ring fastening hole 33 is connected to the top plate of the paint dipping tool seat through fastening bolts, and the outer ring fastening hole 34 is connected to the top of the motor housing through fastening bolts;

[0032] The paint storage tank is connected to the paint inlet and return through hole through a paint inlet and return pipeline, and a paint inlet and return valve is provided on the paint inlet and return pipeline;

[0033] A closed cavity is formed between the paint dipping tool seat, the paint dipping tool top cover and the motor housing, and the motor stator is placed in the closed cavity in the same environment as the vacuum tank; and it can ensure that the motor housing does not deform during the vacuum and pressurization process. In order to seal the cavity, a bottom sealing groove is opened on the support plate, and a bottom sealing strip is placed in the bottom sealing groove to achieve the sealing between the paint dipping tool seat and the motor housing; a first top sealing groove 31 and a second top sealing groove 32 are opened on the paint dipping tool top cover, and a first top sealing strip is placed in the first top sealing groove 31 to achieve the sealing between the paint dipping tool top cover and the motor housing; a second top sealing strip is placed in the second top sealing groove 32 to achieve the sealing between the paint dipping tool top cover and the paint dipping tool seat.

[0034] As a preferred implementation provided in this embodiment, a reinforcing angle plate 42 is provided between the top plate and the inner wall of the varnishing fixture seat; a reinforcing plate 41 is provided on the inner wall of the varnishing fixture seat to increase the strength of the inner cylinder of the varnishing fixture seat and prevent the motor housing and fixture from being deformed during vacuuming and pressurizing.

[0035] The effect of this implementation is that the permanent magnet motor self-circulation vacuum pressure dipping tooling solves the problem of insufficient vacuum tank capacity, can ensure that large motors do not deform during vacuum dipping, and save insulating paint materials; pipelines and valves are connected to achieve self-circulation vacuuming and pressurization.

[0036] The above-mentioned tooling is used in the following way: sealing strips are placed on the bottom sealing groove 43 of the paint dipping tooling seat 4 and the first top sealing groove 31 and the second top sealing groove 32 of the paint dipping tooling top cover 3, and then the motor housing 1 is connected and fixed to the paint dipping tooling seat 4 by fastening bolts. Then the motor housing is turned over, and the paint dipping tooling top cover is connected to the motor housing 1 and the paint dipping tooling seat 4 respectively through the inner ring fastening holes 33 and the outer ring fastening holes 34. After all the fastening bolts are tightened, the paint inlet and return valve 72, the pressure relief valve 52, and the pressurizing valve 82 are closed, and the vacuum valve 93 is opened to start vacuuming the closed cavity, and the value change of the vacuum pressure gauge 51 is checked to check whether the seal is good, until the vacuuming is completed. Close the vacuum valve 93, open the paint inlet and return valve, and the insulating paint starts to flow from the paint storage tank 71 to the closed cavity until the paint delivery is completed. Close the paint inlet and return valve 72, open the pressure valve 82, use the air compressor 81 to pressurize the space inside the motor housing 1, and observe the value change of the pressure gauge 51 until the pressure meets the requirements. Close the pressure valve 82 and start to maintain the pressure until the paint dipping is completed. Open the paint inlet and return valve 72 and the pressure relief valve 52 to withdraw the insulating paint in the closed cavity to complete the entire paint dipping process.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: include: The paint dipping fixture seat has a circle of support plates at the lower part of its outer wall, which is connected to the bottom of the motor housing and has paint inlet and outlet holes; The top cover of the paint dipping tool has an inner ring fastening hole and an outer ring fastening hole, wherein the inner ring fastening hole is connected to the top plate of the paint dipping tool seat through a fastening bolt, and the outer ring fastening hole is connected to the top of the motor housing through a fastening bolt; The paint storage tank is connected to the paint inlet and return holes.

2. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: A three-way pipeline is welded on the top cover of the paint dipping tooling for installing a vacuum pressure gauge and a pressure relief valve.

3. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: The top cover of the paint dipping tool is welded with multi-way pipelines for installing a safety valve, an air compressor and a buffer tank, and the buffer tank is connected to a vacuum pump.

4. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: A closed cavity is formed between the paint dipping tool seat, the paint dipping tool top cover and the motor housing, and the motor stator is placed in the closed cavity.

5. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: The support plate is provided with a bottom sealing groove, in which a bottom sealing strip is placed for achieving sealing between the paint dipping fixture seat and the motor housing.

6. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: A first top sealing groove and a second top sealing groove are formed on the top cover of the painting tooling. A first top sealing strip is placed in the first top sealing groove to achieve sealing between the top cover of the painting tooling and the motor housing; a second top sealing strip is placed in the second top sealing groove to achieve sealing between the top cover of the painting tooling and the painting tooling seat.

7. According to claim 1, a permanent magnet motor self-circulation vacuum pressure impregnation tooling, characterized in that: The paint storage tank is connected with the paint inlet and return through hole through a paint inlet and return pipeline, and a paint inlet and return valve is arranged on the paint inlet and return pipeline.

8. According to claim 3, a permanent magnet motor self-circulation vacuum pressure impregnation tooling is characterized in that: A pressurizing valve is arranged between the air compressor and the multi-way pipeline.

9. A permanent magnet motor self-circulation vacuum pressure impregnation tooling according to claim 3, characterized in that: A vacuum valve is provided between the buffer tank and the multi-way pipeline.

10. The permanent magnet motor self-circulation vacuum pressure impregnation tooling according to claim 1, characterized in that: A reinforcing angle plate is provided between the top plate and the inner wall of the paint dipping fixture seat; a reinforcing plate is provided on the inner wall of the paint dipping fixture seat.

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