A protective tooling for impregnating oil-cooled flat wire motors in new energy applications

Abstract

This utility model discloses a protective fixture for impregnating a new energy flat wire oil-cooled motor. It includes a motor stator winding, a lower pressure plate at the bottom of the stator winding, an impregnation bracket at the bottom of the lower pressure plate, a sealing barrel around the stator winding, a lower sealing gasket between the bottom of the sealing barrel and the lower pressure plate, and an upper pressure plate at the top of the stator winding, with an upper sealing gasket between the top of the sealing barrel and the upper pressure plate. By using the upper and lower sealing gaskets, this fixture, when fully immersed in insulating varnish, forms a completely reliable sealed cavity on the stator's outer surface, effectively preventing the entry of insulating varnish. This ensures that no insulating varnish penetrates during the impregnation process, and the stator's outer surface remains clean after curing. This avoids oil cooling blockage and the need for subsequent polishing of the insulating varnish on the stator's oil circuit area, protecting the stator and ensuring that motor performance is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of oil-cooled motor technology, and specifically relates to a protective tooling for impregnating oil-cooled motors of new energy flat wires. Background Technology

[0002] Common oil-cooled flat-wire motors for new energy heavy-duty trucks have numerous oil passages designed on the outer surface of the stator to ensure that the heat generated by the windings during motor operation can be cooled by the cooling oil. Currently, traditional stator insulation treatment methods include varnish impregnation and varnish dripping. Varnish impregnation requires the entire stator to be immersed in insulating varnish, which cannot guarantee that the outer surface of the stator will not be blocked by the varnish penetration. To prevent such blockages, most manufacturers use varnish dripping. However, due to factors such as equipment investment and motor performance requirements, many oil-cooled flat-wire motors still require varnish impregnation (the stator core is completely immersed in insulating varnish) for insulation treatment. This method inevitably results in insulating varnish adhering to the outer surface. Current treatment methods involve wiping with a thinner after impregnation or manually polishing after curing, but this presents the following problems:

[0003] 1. After wiping the insulating varnish, the stator surface is uneven, making it impossible to guarantee that all surfaces are wiped, thus compromising the wiping effect;

[0004] 2. If the thinner hardens after wiping or hardens directly without wiping, some oil passages will be blocked, requiring grinding. Since manual grinding cannot control the amount of grinding, it will cause varying degrees of damage to the stator surface, affecting the later motor performance or insulation capacity.

[0005] 3. The grinding process is inefficient, becoming a bottleneck process in the production of oil-cooled flat wire motors.

[0006] Therefore, it is necessary to design a protective tooling for impregnating oil-cooled flat-wire motors for new energy applications. Utility Model Content

[0007] The main purpose of this utility model is to provide a protective tooling for impregnating oil-cooled flat wire motors in new energy applications. This tooling solves the problem that when impregnating the stator of a new energy flat wire motor, insulating varnish accumulates on the stator surface after the varnish has cured, causing partial blockage of the oil cooling channels on the stator surface. The grinding method is inefficient and can damage the stator core, thus affecting the performance of the oil-cooled flat wire motor.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a protective tool for impregnating a new energy flat wire oil-cooled motor, including a motor stator winding, a lower pressure plate at the bottom of the motor stator winding, an impregnation bracket at the bottom of the lower pressure plate, a sealing barrel around the motor stator winding, a lower sealing gasket between the bottom of the sealing barrel and the lower pressure plate, an upper pressure plate at the top of the motor stator winding, and an upper sealing gasket between the top of the sealing barrel and the upper pressure plate.

[0009] Furthermore, the lower pressure plate is fixedly connected to the impregnation bracket by bolts.

[0010] Furthermore, the sealing barrel and the lower sealing gasket are fixedly connected to the lower pressure plate by the lower pressure plate fixing bolts.

[0011] Furthermore, the sealing barrel and the upper sealing gasket are fixedly connected to the upper pressure plate by the upper pressure plate fixing bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This fixture has a lower pressure plate at the bottom of the motor stator winding. The bottom of the lower pressure plate is fixedly connected to the varnish impregnation bracket. The bottom of the fixture is completely fixed, making it very convenient to clamp the stator during varnish impregnation. The clamping can be completed quickly by simply removing and installing the upper pressure plate. The clamping requirements are low.

[0014] 2. This fixture, by setting upper and lower sealing gaskets, has a large deformation range, avoiding the problem of poor end face sealing performance and gaps caused by the influence of component manufacturing tolerances when using O-rings, which allows insulating varnish to seep into the outer surface of the stator.

[0015] 3. This tooling can effectively seal the surface during impregnation, avoiding the need for later polishing of the insulating varnish on the oil circuit area of ​​the stator, thus protecting the stator and ensuring that the motor performance is not affected. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a protective tool for impregnating a new energy flat wire oil-cooled motor.

[0017] In the diagram: 1. Motor stator winding; 2. Upper pressure plate; 3. Upper sealing gasket; 4. Sealing barrel; 5. Lower sealing gasket; 6. Lower pressure plate; 7. Lower pressure plate fixing bolts; 8. Upper pressure plate fixing bolts; 9. Stator core. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1 This utility model discloses a protective fixture for impregnating a new energy flat wire oil-cooled motor, including a motor stator winding 1, a lower pressure plate 6 at the bottom of the motor stator winding 1, and an impregnation bracket at the bottom of the lower pressure plate 6. Specifically, the lower pressure plate 6 is fixed to the impregnation bracket by bolts, which facilitates the subsequent impregnation and hoisting.

[0020] Furthermore, a sealing barrel 4 is provided around the stator winding 1 of the motor. A lower sealing gasket 5 is provided between the bottom of the sealing barrel 4 and the lower pressure plate 6. The bottom of the sealing barrel 4 and the lower sealing gasket 5 are fixedly connected to the lower pressure plate 6 by the lower pressure plate fixing bolts 7. They will not be disassembled later. After being fixed by the lower pressure plate fixing bolts 7, the sealing barrel 4 and the lower pressure plate 6 are squeezed against each other, causing the lower sealing gasket 5 to deform, thus playing a sealing and protective role.

[0021] Furthermore, an upper pressure plate 2 is provided on the top of the motor stator winding 1, and an upper sealing gasket 3 is provided between the top of the sealing barrel 4 and the upper pressure plate 2. The top of the sealing barrel 4 and the upper sealing gasket 3 are fixedly connected to the upper pressure plate 2 by the upper pressure plate fixing bolts 8.

[0022] The implementation principle of this utility model is as follows: When the stator core 9 is hoisted into the fixture, the bottom end face of the stator core 9 contacts the lower sealing gasket 5, and the top end face of the stator core 9 contacts the upper sealing gasket 3. Due to manufacturing tolerance differences, there is a certain height difference between the top end face of the stator core 9 and the top end face of the sealing barrel 4, making them approximately flush. After the upper sealing gasket 3 is compressed and deformed, it generates deformation to compensate for the height difference between the top surfaces of the stator core 9 and the sealing barrel 4, thereby achieving a seal. A completely sealed space is formed between the outer circle of the stator core 9 and the inner circle of the sealing barrel 4. When the entire fixture is completely immersed in the insulating varnish, the outer surface of the stator forms a completely reliable sealed cavity, which effectively prevents the entry of insulating varnish, ensuring that no insulating varnish penetrates during the varnishing process. After curing, the outer surface of the stator remains clean, avoiding oil cooling blockage and the need for subsequent polishing of the insulating varnish on the oil circuit area of ​​the stator surface. This protects the stator and ensures that the motor performance is not affected.

[0023] This fixture has a lower pressure plate 6 at the bottom of the motor stator winding 1. The bottom of the lower pressure plate 6 is fixedly connected to the varnish impregnation bracket, and the bottom of the fixture is completely fixed. The stator is very easy to clamp during varnish impregnation. The clamping can be completed quickly by simply removing and installing the upper pressure plate 2. The clamping requirements are low.

[0024] This fixture, by setting an upper sealing gasket 3 and a lower sealing gasket 6, with the thickness of the upper sealing gasket 3 and the lower sealing gasket 6 set according to the actual situation, avoids the problem of poor end face sealing performance and gaps caused by the influence of component manufacturing tolerances when using O-rings, which allows insulating varnish to penetrate into the outer surface of the stator.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective tooling for impregnating a new energy flat wire oil-cooled motor, characterized in that: It includes a motor stator winding (1), a lower pressure plate (6) is provided at the bottom of the motor stator winding (1), an impregnation bracket is provided at the bottom of the lower pressure plate (6), a sealing barrel (4) is provided around the motor stator winding (1), a lower sealing gasket (5) is provided between the bottom of the sealing barrel (4) and the lower pressure plate (6), an upper pressure plate (2) is provided at the top of the motor stator winding (1), and an upper sealing gasket (3) is provided between the top of the sealing barrel (4) and the upper pressure plate (2).

2. The protective tooling for impregnating a new energy flat wire oil-cooled motor according to claim 1, characterized in that: The lower pressure plate (6) is fixedly connected to the paint impregnation bracket by bolts.

3. The protective tooling for impregnating a new energy flat wire oil-cooled motor according to claim 1, characterized in that: The sealing barrel (4) and the lower sealing gasket (5) are fixedly connected to the lower pressure plate (6) by the lower pressure plate fixing bolts (7).

4. The protective tooling for impregnation of a new energy flat wire oil-cooled motor according to claim 1, characterized in that: The sealing barrel (4) and the upper sealing gasket (3) are fixedly connected to the upper pressure plate (2) by the upper pressure plate fixing bolts (8).

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