High-voltage motor stator composite insulation structure

Abstract

The utility model relates to the technical field of high-voltage motors, and provides a composite insulation structure of a high-voltage motor stator, which comprises an aluminum nitride ceramic sleeve sleeved outside the high-voltage motor stator and a liquid cooling assembly used for cooling the stator. The liquid cooling assembly further comprises a refrigeration part used for cooling the cooling liquid returning to the liquid storage tank. A high-voltage motor stator is integrally wrapped through the aluminum nitride ceramic sleeve to achieve a good insulation effect, heat generated by the stator is conducted through the aluminum nitride ceramic sleeve, cooling liquid is pumped into the flow dividing piece through the circulating pump to form liquid cooling circulation, and the cooling liquid flows through the first flow channel to form liquid cooling circulation. Heat conducted by the aluminum nitride ceramic sleeve is absorbed and carried, so that the effect of cooling the stator is achieved, the stator can be efficiently cooled while the insulating property is good, and long-term safe and stable operation of the high-voltage motor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage motor technology, specifically a composite insulation structure for a high-voltage motor stator. Background Technology

[0002] As a core component of high-voltage motors, the insulation performance of the stator directly affects the motor's operational stability and safety. Currently, stator insulation is typically achieved by wrapping the stator with a cylindrical insulation layer, such as using an epoxy fiberglass sleeve for overall coverage. While this method can provide insulation, the overall coverage hinders heat exchange between the stator and the surrounding environment, making it difficult for the heat generated by the stator to dissipate quickly. This leads to an increase in stator temperature, which not only affects insulation performance and accelerates the aging of insulation materials, shortening the motor's lifespan, but may also cause motor malfunctions or even safety accidents.

[0003] Therefore, this utility model proposes a composite insulation structure for a high-voltage motor stator to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a composite insulation structure for a high-voltage motor stator to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A composite insulation structure for a high-voltage motor stator includes an aluminum nitride ceramic sleeve fitted around the outside of the high-voltage motor stator and a liquid cooling assembly for cooling the stator. The inner and outer walls of the aluminum nitride ceramic sleeve are fitted together. The liquid cooling assembly includes a liquid storage tank located outside the high-voltage motor housing, containing coolant. The aluminum nitride ceramic sleeve has a flow divider and a flow merger at both ends. The sleeve wall has multiple first flow channels evenly distributed circumferentially, with both ends connected to the flow divider and the flow merger. The bottom of the liquid storage tank has a circulating pump for pumping coolant into the flow divider. The flow merger is also connected to the liquid storage tank. The liquid cooling assembly further includes a refrigeration component for cooling the coolant returning to the liquid storage tank.

[0007] In one alternative embodiment: the refrigeration component includes a cooling conductor disposed in a liquid storage tank and a cooler disposed outside the liquid storage tank. The cold end of the cooler is connected to the cooling conductor. The cooling conductor is provided with a second flow channel evenly distributed on it. The liquid storage tanks are connected to each other through a return pipe, and the end of the return pipe connected to the liquid storage tank is located above the cooling conductor.

[0008] In one alternative: a spray plate is provided in the liquid storage tank above the cooling conductor, spray heads are evenly distributed on the bottom side of the spray plate, the end of the return pipe away from the manifold is connected to the spray plate, and fins are evenly distributed on the inner wall of the second flow channel.

[0009] In one alternative: the aluminum nitride ceramic sleeve is further provided with insulating plates at both ends for covering the ends of the stator winding coils.

[0010] In one alternative: an adhesive layer is further provided between the inner wall of the aluminum nitride ceramic sleeve and the outer wall of the stator, the adhesive layer being made of a silicone rubber-based composite material.

[0011] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows:

[0012] 1. Aluminum nitride ceramic sleeves have excellent insulation and thermal conductivity. By using aluminum nitride ceramic sleeves to encase the stator of the high-voltage motor, a good insulation effect is achieved. The heat generated by the stator is conducted through the aluminum nitride ceramic sleeves, and the coolant is pumped into the distribution component by the circulation pump. Then, the coolant is distributed into each of the first flow channels, and then collected in the manifold before returning to the storage tank. The cooling component cools the returning coolant, thus forming a liquid cooling cycle. During the flow of the coolant through the first flow channel, it absorbs and carries away the heat conducted by the aluminum nitride ceramic sleeves, thereby playing a role in heat dissipation and cooling of the stator. It has good insulation and can efficiently dissipate heat from the stator, ensuring the long-term safe and stable operation of the high-voltage motor.

[0013] 2. By setting the bonding layer to press against the outer wall of the stator, when the stator vibrates, the bonding layer can adapt to its vibration and always remain in contact with the outer wall of the stator, avoiding gaps that would affect the conduction of heat from the stator to the aluminum nitride ceramic sleeve, thus ensuring efficient heat conduction between the aluminum nitride ceramic sleeve and the stator.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2This is an exploded view of the aluminum nitride ceramic sleeve, insulating plate, busbar, and shunt in this embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the cooling component in an embodiment of the present invention.

[0019] Figure reference numerals: 1-High voltage motor stator, 2-Aluminum nitride ceramic sleeve, 3-Liquid cooling assembly, 301-Liquid storage tank, 302-Manifold, 303-Diverter, 304-Return pipe, 305-Spray plate, 306-Spray head, 307-Cooling component, 308-Refrigerator, 309-Coolant, 310-Circulating pump, 311-Inlet pipe, 312-First flow channel, 313-Second flow channel, 314-Fins, 4-Insulating plate, 5-Adhesive layer. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Please see Figure 1 and Figure 2 A composite insulation structure for a high-voltage motor stator includes an aluminum nitride ceramic sleeve 2 fitted outside the high-voltage motor stator and a liquid cooling assembly 3 for cooling and heat dissipation of the stator. The inner wall of the aluminum nitride ceramic sleeve 2 is fitted to the outer wall of the stator. The liquid cooling assembly 3 includes a liquid storage tank 301 located outside the high-voltage motor housing. The liquid storage tank 301 contains coolant 309. The aluminum nitride ceramic sleeve 2 has a flow divider 303 and a flow collector 302 at both ends. The wall of the aluminum nitride ceramic sleeve 2 is uniformly provided with multiple first flow channels 312 at both ends connected to the flow divider 303 and the flow collector 302. The bottom of the liquid storage tank 301 is provided with a circulation pump 310 for pumping coolant 309 into the flow divider 303. The flow collector 302 is also connected to the liquid storage tank 301. The liquid cooling assembly 3 also includes a refrigeration component for cooling the coolant 309 returning to the liquid storage tank 301.

[0022] The aluminum nitride ceramic sleeve 2 has good insulation and thermal conductivity. The aluminum nitride ceramic sleeve 2 provides excellent insulation by encasing the high-voltage motor stator. The heat generated by the stator is conducted through the aluminum nitride ceramic sleeve 2 and pumped into the distribution component 303 by the circulation pump 310. The coolant 309 is then distributed into each of the first flow channels 312, and then collected in the manifold 302 before returning to the storage tank 301. The cooling component cools the returning coolant 309, thus forming a liquid cooling cycle. As the coolant 309 flows through the first flow channel 312, it absorbs and carries away the heat conducted by the aluminum nitride ceramic sleeve 2, thereby achieving the effect of cooling the stator. It has good insulation and can efficiently dissipate heat from the stator, ensuring the long-term safe and stable operation of the high-voltage motor.

[0023] Furthermore, the aluminum nitride ceramic sleeve 2 is also provided with insulating plates 4 at both ends for covering the ends of the stator winding coils.

[0024] Please see Figure 1 and Figure 3 In one embodiment of the present invention, the refrigeration component includes a cooling conductor 307 disposed in a liquid storage tank 301 and a cooler 308 disposed outside the liquid storage tank 301. The cold end of the cooler 308 (preferably, the cooler 308 is a semiconductor cooler) is connected to the cooling conductor 307. A second flow channel 313 is evenly distributed on the cooling conductor 307. The liquid storage tank 301 is connected to the liquid storage tank 301 through a return pipe 304, and one end of the return pipe 304 connected to the liquid storage tank 301 is located above the cooling conductor 307. The circulating pump 310 is connected to the flow divider 303 through an inlet pipe 311.

[0025] In this embodiment, the coolant 309 returns to the storage tank 301 through the return pipe 304 and falls above the cooling conductor 307. The coolant 308 falling onto the cooling conductor 307 flows downward through the second flow channel 313 and collects at the bottom of the storage tank 301. The cooling conductor 307 is in a low-temperature state under the action of the cooler 308. When the coolant 309 comes into contact with the cooling conductor 307, the heat in the coolant 309 is quickly absorbed, thereby cooling the coolant 309 and ensuring the liquid cooling effect. The cooling conductor 307 is made of metal materials, such as copper or aluminum, to give it good thermal conductivity.

[0026] Furthermore, in this embodiment, the coolant 309 is silicone oil, which has good insulation properties, thereby ensuring the insulation performance of the aluminum nitride ceramic sleeve 2.

[0027] Based on the previous embodiment, please refer to Figure 3In one embodiment of the present invention, a spray plate 305 is provided in the liquid storage tank 301 above the cooling conductor 307, and spray heads 306 are evenly distributed on the bottom side of the spray plate 305. The end of the return pipe 304 away from the manifold 302 is connected to the spray plate 305, and fins 314 are evenly distributed on the inner wall of the second flow channel 313.

[0028] In this embodiment, the returned coolant 309 is concentrated in the spray plate 305 and then sprayed out through the spray head 306. The sprayed coolant 309 is evenly distributed in droplets on the cooling conductor 307, and then flows along the second flow channel 313 to the bottom of the liquid storage tank 301. The downward flowing coolant 309 will hit the fins 314 and be continuously dispersed, so that the coolant 309 is in full contact with the cooling conductor 307 and the fins 314, prolonging the heat exchange time and thus ensuring the cooling effect of the coolant 309.

[0029] Please see Figure 1 and Figure 2 In one embodiment of this utility model, an adhesive layer 5 is further provided between the inner wall of the aluminum nitride ceramic sleeve 2 and the outer wall of the stator. The adhesive layer 5 is made of silicone rubber-based composite material (such as SiC fiber silicone rubber or BN filled silicone rubber). Since the stator of the high-voltage motor will vibrate due to electromagnetic excitation, structural resonance, etc. when it is working, by setting the adhesive layer 5 to press against the outer wall of the stator (silicone rubber-based composite material has insulation, thermal conductivity and a certain elasticity), when the stator vibrates, the adhesive layer 5 can adapt to its vibration and always remain in contact with the outer wall of the stator, avoiding gaps that would affect the conduction of heat from the stator to the aluminum nitride ceramic sleeve 2, and ensuring efficient heat conduction between the aluminum nitride ceramic sleeve 2 and the stator.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high voltage electric machine stator composite insulation structure, characterized by, The application relates to a high-voltage motor cooling device, which comprises an aluminum nitride ceramic sleeve (2) sleeved on the outside of a high-voltage motor stator and a liquid cooling assembly (3) for cooling the stator, the inner wall of the aluminum nitride ceramic sleeve (2) is attached to the (001) outer wall, the liquid cooling assembly (3) comprises a liquid storage tank (301) arranged on the outside of a high-voltage motor shell, the liquid storage tank (301) is provided with cooling liquid (309), the two ends of the aluminum nitride ceramic sleeve (2) are respectively provided with a shunt (303) and a converging member (302), a plurality of first flow channels (312) are uniformly arranged on the circumference of the cylinder wall of the aluminum nitride ceramic sleeve (2) and are respectively communicated with the shunt (303) and the converging member (302), the bottom of the liquid storage tank (301) is provided with a circulating pump (310) for pumping the cooling liquid (309) into the shunt (303), the converging member (302) is also communicated with the liquid storage tank (301), and the liquid cooling assembly (3) further comprises refrigeration components for cooling the cooling liquid (309) returned into the liquid storage tank (301).

2. The high voltage machine stator composite insulation structure of claim 1, wherein, The refrigeration components comprise a cold guide (307) arranged in the liquid storage tank (301) and a refrigerator (308) arranged on the outside of the liquid storage tank (301), the cold end of the refrigerator (308) is connected with the cold guide (307), the cold guide (307) is uniformly provided with second flow channels (313), the liquid storage tank (301) is communicated with the liquid storage tank (301) through a return liquid pipe (304), and one end of the return liquid pipe (304) communicated with the liquid storage tank (301) is located above the cold guide (307).

3. The high voltage machine stator composite insulation structure of claim 2, wherein, The liquid storage tank (301) is provided with a spraying disc (305) above the cold guide (307), the bottom side of the spraying disc (305) is uniformly provided with spraying heads (306), one end of the return liquid pipe (304) away from the converging member (302) is communicated with the spraying disc (305), and the inner wall of the second flow channel (313) is also uniformly provided with fins (314).

4. The high voltage machine stator composite insulation structure of claim 1, wherein, The two ends of the aluminum nitride ceramic sleeve (2) are also provided with insulating plates (4) for covering the end portions of stator winding coils.

5. The high voltage machine stator composite insulation structure of claim 1, wherein, The inner wall of the aluminum nitride ceramic sleeve (2) and the outer wall of the stator are also provided with an attachment layer (5), and the attachment layer (5) is made of a silicon rubber-based composite material.

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