Composite oil cooling structure for permanent magnet motor
Patent Information
- Application Number
- CN202522288898.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-29
AI Technical Summary
首先，现有的油冷结构在进行电机冷却时，冷却油通过某一部位注入，冷却油分布不均，冷却油需要慢慢扩散至电机各个部位，影响冷却效率；
1、本实用新型中，电机工作时，冷却油输入喷淋环中，随着冷却油的加注，冷却油逐渐扩散至其他的喷淋环与输送管中，随着冷却油的流动，喷淋环内壁的喷头将冷却油喷出，喷出的油液落在壳体内部的转子、定子等部件上，对定子、转子等部件进行冷却与润滑，将定子与转子等部件工作产生的热量带走，由于喷淋环等距分布，喷头喷淋的冷却油能同时附着于定子、转子等部件的不同部位，同时浸润所有部件，润滑冷却更加均匀，能够快速进行降温冷却，同时，由于冷却油在输送管之间流动，且输送管分布于壳体内部，在冷却油流动过程中，会将扩散至壳体的热量吸收，从而对壳体进行降温，相比于传统电机油冷结构，通过喷淋冷却与流动冷却相结合，喷淋冷却吸收定子、转子等部件直接产生的热量，流动冷却吸收扩散的热量，二者相互配合，能够快速对电机内部元件进行冷却，电机冷却降温效果更佳。
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Figure CN224909248U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of permanent magnet motor technology, and in particular to a composite oil-cooling structure for permanent magnet motors. Background Technology
[0002] A permanent magnet motor is a type of motor that converts electrical energy into mechanical energy by generating a constant magnetic field through permanent magnets. Its core components consist of a stator and a rotor. The stator includes windings (AC type) or permanent magnets (DC type), while the rotor is equipped with permanent magnets or excitation coils (traditional type). Permanent magnets generate torque through the interaction of electromagnetic induction and current. Permanent magnet motors are widely used in industrial automation for high-precision servo systems and robots; in transportation for electric vehicles and wind turbines; and in home appliances for high-efficiency equipment such as air conditioners and refrigerators. Because permanent magnet motors generate high temperatures during operation, heat dissipation is necessary to prevent motor failure. Current motor cooling methods mainly include oil cooling and water cooling. Compared to water cooling, oil cooling allows the cooling oil to directly contact the internal components of the motor, resulting in better cooling performance.
[0003] However, the existing oil-cooled structure for electric motors has certain shortcomings: First, in the existing oil-cooling structure, when cooling the motor, the cooling oil is injected through a certain part, resulting in uneven distribution of the cooling oil. The cooling oil needs to slowly diffuse to all parts of the motor, which affects the cooling efficiency. Secondly, the existing oil-cooling structure can only dissipate heat by the flow of cooling oil inside the motor, which takes a long time. During this process, the heat will gradually diffuse to the motor housing, while the cooling oil will accumulate at the bottom of the motor housing due to gravity, resulting in poor heat dissipation and cooling effect on other parts of the motor housing. Utility Model Content
[0004] The purpose of this application is to provide a composite oil-cooling structure for permanent magnet motors to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this application provides the following technical solution: a composite oil-cooling structure for a permanent magnet motor, comprising a housing, wherein a cooling component and a recovery component are disposed inside the housing, both the cooling component and the recovery component are adapted to the housing, and the cooling component and the recovery component are staggered, with the ends of the cooling component and the recovery component being at the same horizontal plane as the inner wall of the housing, the cooling component comprising mounting grooves equally spaced inside the housing, each mounting groove having a spray ring mounted on its inner wall, the spray ring having nozzles equally spaced on its inner wall, the nozzles being mounted inside the spray ring, the ends of the nozzles being at the same horizontal plane as the inner wall of the spray ring, and each spray ring having a conveying pipe equally spaced between the spray rings, the length of the conveying pipe being less than the length of the housing, and the conveying pipe being arranged in a ring on the outer wall of the spray ring.
[0006] Preferably, an oil inlet pipe is provided at the middle position of the top of the outer wall of the housing, and the end of the oil inlet pipe is connected to one of the spray rings.
[0007] Preferably, the recycling component includes recycling pipes equidistantly arranged on the inner wall of the bottom of the housing, the recycling pipes being staggered with the spray ring, and each recycling pipe having a collecting pipe connected to its end, the collecting pipe being adapted to the conveying pipe.
[0008] Preferably, the bottom of the collecting pipe is provided with a return oil pipe that penetrates the shell, the outer wall of the inlet pipe is equipped with a one-way inlet valve, and the return oil pipe is equipped with a one-way outlet valve.
[0009] Preferably, a shell cover and a shell bottom are respectively installed at both ends of the shell, and the shell cover and the shell bottom are adapted to the shell. The outer wall of the shell cover is provided with a transmission hole adapted to it.
[0010] Preferably, the outer wall of the shell cover and the shell bottom near the shell is provided with a sealing gasket, the sealing gasket is adapted to the shell cover and the shell bottom respectively, and the sealing gasket is made of corrosion-resistant silicone material.
[0011] In summary, the technical effects and advantages of this utility model are as follows: 1. In this utility model, when the motor is working, cooling oil is input into the spray ring. As the cooling oil is added, it gradually diffuses to other spray rings and the delivery pipe. With the flow of the cooling oil, the nozzles on the inner wall of the spray rings spray out the cooling oil. The sprayed oil falls onto the rotor, stator, and other components inside the housing, cooling and lubricating them, and carrying away the heat generated by the stator and rotor during operation. Because the spray rings are evenly distributed, the cooling oil sprayed by the nozzles can simultaneously adhere to different parts of the stator and rotor, thus simultaneously wetting all components. The components are lubricated and cooled more evenly, enabling rapid cooling. Simultaneously, because the cooling oil flows between the delivery pipes, which are distributed inside the housing, the oil absorbs heat diffused into the housing during its flow, thus cooling the housing. Compared to traditional motor oil-cooling structures, this combination of spray cooling and flow cooling—where spray cooling absorbs heat directly generated by components such as the stator and rotor, and flow cooling absorbs diffused heat—works together to rapidly cool the internal components of the motor, resulting in superior cooling performance.
[0012] 2. In this utility model, when the motor is oil-cooled, the oil inlet pipe feeds the oil into the spray ring for spray cooling. The used cooling oil is collected in the recovery pipe at the bottom of the housing 1. The collection pipe discharges the oil collected in the recovery pipe through the return pipe, thereby completing the replacement of the cooling oil. The oil inlet pipe and the return pipe work together to realize the circulation of the oil, which facilitates the heat dissipation of the oil. The housing cover and the housing bottom cooperate to seal the housing. The sealing gasket seals the connection between the housing, the housing cover and the housing bottom to improve airtightness and prevent oil leakage. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the main body's external structure in an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of the shell in an embodiment of this application; Figure 3 This is a schematic diagram of the cooling component structure in an embodiment of this application; Figure 4 This is a schematic diagram of the recycling component structure in an embodiment of this application.
[0015] In the diagram: 1. Shell; 2. Spray ring; 3. Nozzle; 4. Delivery pipe; 5. Oil inlet pipe; 6. Recovery pipe; 7. Collection pipe; 8. Return pipe; 9. One-way oil inlet valve; 10. One-way oil outlet valve; 11. Shell cover; 12. Shell bottom; 13. Sealing gasket. Detailed Implementation
[0016] 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.
[0017] Example: Reference Figure 1-4The composite oil-cooling structure for a permanent magnet motor shown includes a housing 1. A cooling component and a recovery component are disposed inside the housing 1. Both the cooling component and the recovery component are adapted to the housing 1 and are arranged alternately. The ends of both the cooling component and the recovery component are at the same horizontal plane as the inner wall of the housing 1. The cooling component includes mounting grooves evenly spaced inside the housing 1. Spray rings 2 are installed on the inner walls of the mounting grooves. Spray nozzles 3 are evenly distributed on the inner walls of the spray rings 2. The nozzles 3 are installed inside the spray rings 2, and their ends are at the same horizontal plane as the inner wall of the spray rings 2. Equally distributed conveying pipes 4 are arranged between the spray rings 2. The length of the conveying pipes 4 is less than the length of the housing 1, and the conveying pipes 4 are arranged in a ring on the outer wall of the spray rings 2.
[0018] With the above structure: when the motor is working, cooling oil is input into the spray ring 2. As the cooling oil is added, it gradually diffuses to the other spray rings 2 and the delivery pipe 4. With the flow of the cooling oil, the nozzles 3 on the inner wall of the spray ring 2 spray out the cooling oil. The sprayed oil falls onto the rotor, stator, and other components inside the housing 1, cooling and lubricating them, and carrying away the heat generated by the stator and rotor during operation. Because the spray rings 2 are evenly distributed, the cooling oil sprayed by the nozzles 3 can simultaneously adhere to different parts of the stator and rotor, thus simultaneously wetting them. With certain components, lubrication and cooling are more uniform, enabling rapid cooling. Simultaneously, because the cooling oil flows between the delivery pipes 4, which are distributed inside the housing 1, the cooling oil absorbs the heat diffused to the housing 1 during its flow, thereby cooling the housing 1. Compared to the traditional motor oil cooling structure, this design combines spray cooling and flow cooling. Spray cooling absorbs the heat directly generated by components such as the stator and rotor, while flow cooling absorbs the diffused heat. The two work together to quickly cool the internal components of the motor, resulting in a better motor cooling effect.
[0019] like Figure 3 As shown, an oil inlet pipe 5 is provided at the middle position of the top of the outer wall of the housing 1. The end of the oil inlet pipe 5 is connected to one of the spray rings 2. The recovery component includes recovery pipes 6 arranged at equal intervals on the inner wall of the bottom of the housing 1. The recovery pipes 6 and the spray rings 2 are staggered. The end of each recovery pipe 6 is connected to a collection pipe 7. The collection pipe 7 is adapted to the delivery pipe 4. The bottom of the collection pipe 7 is provided with a return oil pipe 8 that penetrates the housing 1. A one-way oil inlet valve 9 is installed on the outer wall of the oil inlet pipe 5, and a one-way oil outlet valve 10 is installed on the return oil pipe 8. When the motor is oil-cooled, the oil inlet pipe 5 inputs the oil into the spray rings 2 for spray cooling. The used cooling oil is collected at the bottom of the housing 1 through the recovery pipe 6. The collection pipe 7 discharges the oil collected by the recovery pipe 6 through the return oil pipe 8, thereby completing the replacement of the cooling oil. The oil inlet pipe 5 and the return oil pipe 8 cooperate to realize the circulation of the oil, which facilitates the cooling of the oil.
[0020] like Figure 1As shown, a cover 11 and a bottom 12 are respectively installed at both ends of the housing 1. The cover 11 and the bottom 12 are adapted to the housing 1. The outer wall of the cover 11 has a transmission hole adapted to it. A sealing gasket 13 is provided on the outer wall of the cover 11 and the bottom 12 near the housing 1. The sealing gasket 13 is adapted to the cover 11 and the bottom 12 respectively. The sealing gasket 13 is made of corrosion-resistant silicone. The cover 11 and the bottom 12 cooperate to seal the housing 1. The sealing gasket 13 seals the connection between the housing 1, the cover 11 and the bottom 12 to improve air tightness and prevent oil leakage.
[0021] The working principle of this practical application is as follows: When the motor is working, cooling oil is fed into the spray ring 2. As the cooling oil is added, it gradually diffuses into the other spray rings 2 and the delivery pipe 4. With the flow of the cooling oil, the nozzles 3 on the inner wall of the spray ring 2 spray out the cooling oil. The sprayed oil falls onto the rotor, stator, and other components inside the housing 1, cooling and lubricating them and carrying away the heat generated by the stator and rotor during operation. Because the spray rings 2 are evenly distributed, the cooling oil sprayed by the nozzles 3 can simultaneously adhere to different parts of the electronic and rotor components, thus simultaneously wetting all components. The lubrication and cooling are more uniform, enabling rapid cooling. At the same time, since the cooling oil flows between the delivery pipes 4 and the delivery pipes 4 are distributed inside the housing 1, the cooling oil absorbs the heat diffused to the housing 1 during the flow process, thereby cooling the housing 1. Compared with the traditional motor oil cooling structure, the combination of spray cooling and flow cooling allows the spray cooling to absorb the heat directly generated by components such as the stator and rotor, while the flow cooling absorbs the diffused heat. The two work together to quickly cool the internal components of the motor, resulting in a better motor cooling effect. When the motor is oil-cooled, the oil inlet pipe 5 feeds oil into the spray ring 2 for spray cooling. The used cooling oil is collected in the metal recovery pipe 6 at the bottom of the housing 1. The collection pipe 7 discharges the oil collected in the recovery pipe 6 through the return pipe 8, thus completing the replacement of the cooling oil. The oil inlet pipe 5 and the return pipe 8 work together to realize the circulation of the oil, which facilitates the heat dissipation of the oil. The housing cover 11 and the housing bottom 12 cooperate to seal the housing 1. The sealing gasket 13 seals the connection between the housing 1, the housing cover 11, and the housing bottom 12 to improve airtightness and prevent oil leakage.
[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A composite oil-cooling structure for a permanent magnet motor, comprising a housing (1), characterized in that: The housing (1) is provided with a cooling component and a recycling component. The cooling component and the recycling component are adapted to the housing (1). The cooling component and the recycling component are arranged alternately. The ends of the cooling component and the recycling component are at the same level as the inner wall of the housing (1). The cooling component includes mounting grooves that are opened at equal intervals inside the housing (1). Spray rings (2) are installed on the inner wall of the mounting grooves. Spray nozzles (3) are arranged at equal intervals on the inner wall of the spray rings (2). The nozzles (3) are installed inside the spray rings (2). The ends of the nozzles (3) are at the same level as the inner wall of the spray rings (2). Conveying pipes (4) are arranged at equal intervals between the spray rings (2). The length of the conveying pipes (4) is less than the length of the housing (1). The conveying pipes (4) are arranged in a ring on the outer wall of the spray rings (2).
2. The composite oil-cooling structure for a permanent magnet motor according to claim 1, characterized in that: An oil inlet pipe (5) is provided at the middle position of the top of the outer wall of the housing (1), and the end of the oil inlet pipe (5) is connected to one of the spray rings (2).
3. The composite oil-cooling structure for a permanent magnet motor according to claim 2, characterized in that: The recycling assembly includes recycling pipes (6) that are equidistantly arranged on the inner wall of the bottom of the housing (1). The recycling pipes (6) are staggered with the spray ring (2). The ends of the recycling pipes (6) are connected to a collection pipe (7). The collection pipe (7) is adapted to the conveying pipe (4).
4. The composite oil-cooling structure for a permanent magnet motor according to claim 3, characterized in that: The bottom of the collecting pipe (7) is provided with a return oil pipe (8) that penetrates the housing (1), the outer wall of the inlet pipe (5) is equipped with a one-way inlet valve (9), and the return oil pipe (8) is equipped with a one-way outlet valve (10).
5. The composite oil-cooling structure for a permanent magnet motor according to claim 1, characterized in that: The shell (1) is equipped with a shell cover (11) and a shell bottom (12) at both ends. The shell cover (11) and the shell bottom (12) are adapted to the shell (1). The outer wall of the shell cover (11) is provided with a transmission hole adapted to it.
6. The composite oil-cooling structure for a permanent magnet motor according to claim 5, characterized in that: The outer wall of the shell cover (11) and the shell bottom (12) near the shell (1) is provided with a sealing gasket (13). The sealing gasket (13) is adapted to the shell cover (11) and the shell bottom (12) respectively. The sealing gasket (13) is made of corrosion-resistant silicone material.