Motor cooling circulation device and motor cooling system

Abstract

This invention provides a motor cooling circulation device and a motor cooling system. The motor cooling system includes a motor and a motor cooling circulation device, which is connected to the motor and provides a cooling medium to it. The motor cooling circulation device includes an oil pan assembly, a pump body, a heat exchanger, and a constant temperature chamber. The oil pan assembly, pump body, heat exchanger, and motor are sequentially connected via a delivery pipeline. The oil pan assembly is fixed to the bottom of the motor and stores all the cooling medium in the motor and the delivery pipeline. The constant temperature chamber has a containment space in which the oil pan assembly, pump body, heat exchanger, and motor are all placed. This device eliminates the need for a bulky oil tank. Even if the pump body fails, the cooling medium inside the motor can still smoothly enter the oil pan assembly, avoiding the risk of additional motor failure due to oil accumulation causing the oil level to exceed the rotor. Furthermore, by placing all components in the circulation pipeline within the constant temperature chamber, the device controls the cooling medium inside the motor to reach a specified temperature, ensuring the safety and reliability of the entire system.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and in particular to a motor cooling circulation device and a motor cooling system. Background Technology

[0002] As the power density requirements of electric drive systems for new energy vehicles continue to rise, the technological advantages of oil-cooled motors are becoming increasingly apparent. Especially for multi-functional electric drive assemblies, the application of oil-cooled motors is becoming more and more widespread. In reliability verification of motor components and durability verification tests of motor cooling pipes, it is necessary to connect the motor to a motor cooling circulation device, which then provides the motor with a circulating cooling medium.

[0003] However, there are many shortcomings when conducting reliability and durability tests on the motor. First, the motor in the all-in-one electric drive assembly only has inlet and outlet ports on the end caps, and the motor itself does not have a corresponding complete sealed housing, making it inconvenient to test and verify the cooling pipes inside the motor.

[0004] Secondly, existing motor cooling circulation units have complex structures, numerous parts, and high costs. Furthermore, they are prone to system stability issues, leading to malfunctions and failures unrelated to product verification. To precisely control the flow rate of the cooling medium entering the motor and ensure the liquid level inside the motor does not exceed the air gap between the stator and rotor, the motor cooling circulation unit requires a large heat exchange storage tank and two pumps in the pipeline. One pump controls the oil inflow to the motor, while the other ensures sufficient and timely oil extraction during motor discharge. The large size of the storage tank and the presence of two pumps, along with the complexity of pump control, result in high costs for both the motor cooling circulation unit and its control system, leading to poor economic efficiency. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a motor cooling circulation device and a motor cooling system. This device eliminates the need for a bulky oil tank. Even if the pump fails, the cooling medium inside the motor can still smoothly enter the oil pan assembly, avoiding the risk of additional motor failure due to oil accumulation causing the oil level to exceed the rotor. Furthermore, the device places all components in the circulation pipeline in a constant temperature chamber to control the cooling medium inside the motor to reach a specified temperature, preventing the cooling medium temperature from exceeding the standard and ensuring the safety and reliability of the entire system.

[0006] To achieve the above objectives, this utility model provides a motor cooling circulation device for supplying cooling medium to a motor. The device includes an oil pan assembly, a pump body, a heat exchanger, and a constant temperature chamber. The oil pan assembly, pump body, heat exchanger, and motor are sequentially connected via a delivery pipeline. The oil pan assembly is fixed to the bottom of the motor and stores all the cooling medium within the motor and the delivery pipeline. The constant temperature chamber has a containment space in which the oil pan assembly, pump body, heat exchanger, and motor are all placed. The constant temperature chamber exchanges heat with the heat exchanger, thereby controlling the temperature of the cooling medium within the delivery pipeline.

[0007] Optionally, the motor is an oil-cooled motor, and the pump body is configured as an electronic oil pump. The electronic oil pump is used to draw cooling oil from the motor and to control the flow rate of cooling oil in the delivery pipeline.

[0008] Optionally, the motor is a water-cooled motor, and the pump body is configured as an electronic water pump, which is used to draw cooling water from the motor.

[0009] Optionally, the oil pan assembly includes an oil pan that is funnel-shaped and is used to fix the oil pan to the outlet of the motor.

[0010] Optionally, the oil pan assembly further includes an oil passage filter disposed within the oil pan and used to filter the cooling medium within the oil pan.

[0011] Optionally, the motor cooling circulation device further includes a pressure regulating valve, which is disposed between the pump body and the heat exchanger and is used to control the pressure of the cooling medium in the delivery pipeline.

[0012] Optionally, the motor cooling circulation device further includes a three-way valve, which is disposed between the heat exchanger and the motor. The first end of the three-way valve is connected to the heat exchanger, the second end of the three-way valve is used to connect to the first inlet of the motor, and the third end of the three-way valve is used to connect to the second inlet of the motor.

[0013] Optionally, the motor cooling circulation device further includes a first flow meter and a second flow meter, wherein the first flow meter is disposed between the first end of the three-way valve and the first inlet of the motor, and the second flow meter is disposed between the second end of the three-way valve and the second inlet of the motor.

[0014] To achieve the above objectives, the present invention also provides a motor cooling system, including a motor and any of the motor cooling circulation devices described in the present invention, wherein the motor cooling circulation device is connected to the motor and is used to provide a cooling medium to the motor.

[0015] Optionally, the motor is used to connect to the oil pan assembly after the inner diameter of the outlet is enlarged.

[0016] This invention provides a motor cooling circulation device and a motor cooling system. The device is suitable for overall motor performance testing, overall motor calibration testing, or overall motor reliability and durability testing. By installing an oil pan assembly at the bottom of the motor, the oil pan assembly replaces the heat exchange oil tank and contains all the cooling medium in the motor and delivery pipeline. The cooling medium inside the motor flows into the oil pan assembly by gravity. On the one hand, even if the pump fails, the cooling medium inside the motor can still smoothly enter the oil pan assembly, preventing the cooling medium from stagnating inside the motor and causing abnormal cooling medium levels that could lead to malfunctions. On the other hand, this invention eliminates the need for a bulky oil tank, reducing the size of the motor cooling circulation device, and only requires one pump, thereby reducing the cost of the device components.

[0017] Furthermore, the device places all components in the entire circulation pipeline within a constant temperature chamber. The heat exchanger dissipates heat from the cooling medium, and the constant temperature chamber exchanges heat with the heat exchanger. This allows the heat exchanger to regulate the temperature of the cooling medium in the circulation pipeline, ultimately controlling the cooling medium inside the motor to reach the specified temperature. This improves the heat exchange rate and temperature rise / fall rate of the cooling medium, reduces the high and low temperature durability cycle time of the motor, and increases the testing efficiency of the motor. At the same time, it also prevents the temperature of the cooling medium from exceeding the limit, ensuring the safety and reliability of the entire system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the motor cooling system in a preferred embodiment of the present invention.

[0019] In the picture:

[0020] Oil pan assembly 1; oil pan 11; outlet 12; pump body 2; heat exchanger 3; constant temperature chamber 4; containment space 41; motor 5; first inlet 51; second inlet 52; delivery pipeline 6; pressure regulating valve 7; three-way valve 8; first flow meter 91; second flow meter 92. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0022] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] As used in this specification, the terms "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and preferred embodiments. Unless otherwise specified, the following embodiments and features can complement or combine with each other.

[0026] Reference Figure 1 As shown, a preferred embodiment of this utility model provides a motor cooling circulation device for supplying cooling medium to a motor. The device includes an oil pan assembly 1, a pump body 2, a heat exchanger 3, and a constant temperature chamber 4. The oil pan assembly 1, pump body 2, heat exchanger 3, and motor 5 are sequentially connected via a delivery pipeline 6. The oil pan assembly 1 is fixed to the bottom of the motor and connected to the outlet 12 (e.g., oil nozzle) of the motor 5. The oil pan assembly 1 stores all the cooling medium in the motor 5 and the delivery pipeline 6. The pump body 2 extracts the cooling medium from the oil pan assembly 1 and delivers it to the inlet of the motor 5. The constant temperature chamber 4 has a receiving space 41, in which the oil pan assembly 1, pump body 2, heat exchanger 3, and motor 5 are all placed. The constant temperature chamber 4 exchanges heat with the heat exchanger 3, thereby controlling the temperature of the cooling medium in the delivery pipeline 6.

[0027] Reference Figure 1As shown, a preferred embodiment of the present invention also provides a motor cooling system, including a motor 5 and any of the motor cooling circulation devices described in the present invention. The motor cooling circulation device is connected to the motor 5 and is used to provide a cooling medium to the motor 5.

[0028] In the existing technology, the motor cooling circulation unit needs to be equipped with a large heat exchange liquid storage tank and two pumps in the pipeline. One pump can control the oil inlet flow of the motor, and the other pump can ensure that the oil is fully and timely pumped out when the motor is discharging oil.

[0029] This application provides a motor cooling circulation device and a motor cooling system. The motor cooling circulation device is applicable to overall motor performance testing, overall motor calibration testing, or overall motor reliability and durability testing. By installing an oil pan assembly 1 at the bottom of the motor 5, the oil pan assembly 1 can replace the heat exchange oil tank and contain all the cooling medium in the motor 5 and the delivery pipeline 6. The cooling medium inside the motor 5 can flow into the oil pan assembly 1 by gravity.

[0030] This configuration offers several advantages. First, even if the pump malfunctions, the cooling medium inside the motor can still smoothly enter the oil pan assembly 1, preventing it from stagnating inside the motor 5 and causing abnormal cooling medium levels that could lead to malfunction. Second, it eliminates the need for a bulky oil tank, reducing the size of the motor cooling circulation system. Only one pump body 2 is required, simplifying the structure, reducing component costs, improving the reliability of the oil circulation system, and lowering the failure rate of the motor 5. Furthermore, controlling a single oil pump is simpler and more operable than controlling two pumps together. In a single-pump system, even if one pump malfunctions, the liquid level inside the motor 5 will not become abnormal, thus avoiding any impact on the test results.

[0031] Furthermore, the device places all components in the entire circulation pipeline within a constant temperature chamber 4. The heat exchanger 3 (e.g., a plate heat exchanger) dissipates heat from the cooling medium, and the constant temperature chamber 4 exchanges heat with the heat exchanger 3. This allows the heat exchanger 3 to regulate the temperature of the cooling medium in the circulation pipeline, ultimately controlling the cooling medium inside the motor to reach the specified temperature. This improves the heat exchange rate and temperature rise / fall rate of the cooling medium, reduces the high and low temperature durability cycle time of the motor 5, and increases the testing efficiency of the motor 5. At the same time, it also prevents the temperature of the cooling medium from exceeding the limit, ensuring the safety and reliability of the entire system.

[0032] It should be noted that the volume of the oil pan assembly 1 must be large enough to accommodate all the cooling medium inside the motor 5 and the delivery pipeline 6, so that the oil pan assembly 1 can store the cooling medium inside the motor 5 and the delivery pipeline 6. This simplifies the structure of the cooling circulation device and saves manufacturing costs.

[0033] In one embodiment, the motor 5 is an oil-cooled motor. In this case, the motor cooling circulation device is applied to the oil-cooled motor. Preferably, the pump body 2 can be set as an electronic oil pump. The electronic oil pump is used to draw cooling oil from the motor 5 and to control the flow rate of cooling oil in the delivery pipeline 6, so as to avoid failures in the test due to the oil level in the motor 5 exceeding the air gap between the motor stator and rotor, resulting in additional torque of the motor.

[0034] Preferably, the electronic oil pump can be an automotive-grade electronic oil pump. The electronic oil pump can adjust the supply of cooling oil in the delivery pipeline by adjusting parameters such as speed, voltage or current, thereby adjusting the flow rate of cooling oil delivered to the motor 5, improving fuel economy and enhancing the safety and reliability of the motor 5 during the test process.

[0035] In another embodiment, the motor is a water-cooled motor. In this case, the motor cooling circulation device is applied to the water-cooled motor. Preferably, the pump body 2 can be set as an electronic water pump. The electronic water pump is used to draw cooling water (e.g., a cooling medium of ethylene glycol and water) from the motor 5 and to deliver the cooling water to the inlet of the water-cooled motor. In actual use, the flow rate of the cooling water in the delivery pipeline 6 can be adjusted by the electronic water pump, thereby controlling the circulation process of the cooling water.

[0036] Continue to refer to Figure 1 The oil pan assembly 1 includes an oil pan 11, which is funnel-shaped. An outlet 12 is provided at the bottom of the oil pan 11. The oil pan 11 is used to fix the motor 5 to the outlet 12. The pump body 2 is connected to the outlet 12 through the delivery pipeline 6, thereby realizing the connection between the pump body 2 and the oil pan 11.

[0037] In a preferred embodiment, the motor 5 is used to connect to the oil pan assembly 1 after the inner diameter of the outlet is enlarged. That is, the outlet 12 at the bottom of the motor 5 can be enlarged so that the cooling medium inside the motor 5 can flow smoothly under gravity and settle in the oil pan 11.

[0038] Preferably, the oil pan assembly 1 further includes an oil passage filter (not shown), which is disposed inside the oil pan 11 and is used to filter the cooling medium inside the oil pan 11 to prevent large particulate impurities in the cooling medium from entering the pump body 2 and to protect the pump body 2 from wear.

[0039] Furthermore, the motor cooling circulation device preferably also includes a pressure regulating valve 7. The pressure regulating valve 7 can be set between the pump body 2 and the heat exchanger 3 and is used to control the pressure of the cooling medium in the delivery pipeline 6. This allows for the adjustment of the pressure of the cooling medium entering the heat exchanger 3, ensuring that the cooling medium enters the heat exchanger 3 at a stable and appropriate pressure. This helps to control the flow rate and volume of the cooling medium in the heat exchanger 3, enabling the heat exchanger 3 to perform heat exchange more efficiently and preventing the heat exchange effect from being affected by excessively high or low pressure.

[0040] This application does not limit the specific location of the pressure regulating valve 7; the pressure regulating valve 7 only needs to be connected in series in the delivery pipeline 6.

[0041] In another embodiment, the pressure regulating valve 7 can also be set between the heat exchanger 3 and the motor 5, thereby adjusting the pressure flowing out of the heat exchanger 3, ensuring the pressure safety in the delivery pipeline 6, helping to maintain the pressure balance of the entire circulation pipeline, and ensuring the normal circulation of the cooling medium in the delivery pipeline 6.

[0042] Continue to refer to Figure 1 As shown, in a specific example, the motor 5 has a stator assembly and a rotor assembly, and has a first inlet 51 communicating with the stator assembly and a second inlet 52 communicating with the rotor assembly. The motor cooling circulation device also includes a three-way valve 8, which is disposed between the heat exchanger 3 and the motor 5. The first end of the three-way valve 8 is connected to the heat exchanger 3, and the second end of the three-way valve 8 is used to connect to the first inlet 51 of the motor 5 (e.g., a first oil inlet). The cooling medium entering the first inlet 51 can cool the stator assembly within the motor 5. Further, the third end of the three-way valve 8 is used to connect to the second inlet 52 of the motor 5 (e.g., a second oil inlet), and the cooling medium entering the second inlet 52 can cool the rotor assembly within the motor 5. The three-way valve 8 is used to divert the cooling medium in the delivery pipeline 6 to deliver the cooling medium to the first inlet 51 and the second inlet 52 respectively.

[0043] In other embodiments, the motor 5 can also be configured as a single motor, and the motor cooling circulation device can also be used to test the overall performance and durability of a single motor without a rotor. In this case, the motor 5 has only one inlet, and it is only necessary to connect the heat exchanger 3 of the motor cooling circulation device to the inlet of the motor 5.

[0044] As a preferred embodiment, the motor cooling circulation device further includes a first flow meter 91 and a second flow meter 92. The first flow meter 91 is disposed between the second end of the three-way valve 8 and the first inlet 51 of the motor 5, and is used to limit the flow rate of the cooling medium entering the first inlet 51 of the motor 5. The second flow meter 92 is disposed between the third end of the three-way valve 8 and the second inlet 52 of the motor 5, and is used to limit the flow rate of the cooling medium entering the second inlet 52 of the motor 5.

[0045] In summary, this utility model provides a motor cooling circulation device and a motor cooling system. This motor cooling circulation device is suitable for overall motor performance testing, overall motor calibration testing, or overall motor reliability and durability testing. By installing an oil pan assembly 1 at the bottom of the motor 5, the oil pan assembly 1 can replace the heat exchange oil tank and contain all the cooling medium in the motor 5 and the delivery pipeline 6. The cooling medium inside the motor 5 can flow into the oil pan assembly 1 by gravity. On the one hand, even if the pump fails, the cooling medium inside the motor can still smoothly enter the oil pan assembly 1, preventing the cooling medium from stagnating inside the motor 5 and causing abnormal cooling medium levels and malfunctions. On the other hand, this utility model eliminates the need for a bulky oil tank device, reducing the size of the motor cooling circulation device, and only requires one pump body 2, thereby reducing the cost of the device components.

[0046] Furthermore, the device places all components in the entire circulation pipeline within a constant temperature chamber 4. The heat exchanger 3 dissipates heat from the cooling medium, and the constant temperature chamber 4 exchanges heat with the heat exchanger 3. This allows the heat exchanger 3 to regulate the temperature of the cooling medium in the circulation pipeline, ultimately controlling the cooling medium inside the motor to reach the specified temperature. This improves the heat exchange rate and temperature rise / fall rate of the cooling medium, reduces the high and low temperature durability cycle time of the motor 5, and increases the testing efficiency of the motor 5. At the same time, it also prevents the temperature of the cooling medium from exceeding the limit, ensuring the safety and reliability of the entire system.

[0047] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model.

Claims

1. An electric machine cooling circulation device for delivering a cooling medium to an electric machine, characterized by The device includes an oil pan assembly, a pump body, a heat exchanger, and a constant temperature chamber. The oil pan assembly, the pump body, the heat exchanger, and the motor are connected sequentially via a delivery pipeline. The oil pan assembly is used to fix the bottom of the motor and to store all the cooling medium in the motor and the delivery pipeline. The constant temperature chamber has a receiving space in which the oil pan assembly, the pump body, the heat exchanger, and the motor are all placed. The constant temperature chamber is used to exchange heat with the heat exchanger, thereby controlling the temperature of the cooling medium in the delivery pipeline.

2. The electric motor cooling circulatory device of claim 1, wherein, The motor is an oil-cooled motor, and the pump body is configured as an electronic oil pump. The electronic oil pump is used to draw cooling oil from the motor and to control the flow rate of cooling oil in the delivery pipeline.

3. The electric motor cooling circulatory device of claim 1, wherein, The motor is a water-cooled motor, and the pump body is configured as an electronic water pump, which is used to draw cooling water from the motor.

4. The electric motor cooling circulatory device of claim 1, wherein, The oil pan assembly includes an oil pan, which is funnel-shaped and used to fix the oil pan to the outlet of the motor.

5. The electric motor cooling circulatory device of claim 4, wherein, The oil pan assembly also includes an oil passage filter, which is disposed inside the oil pan and used to filter the cooling medium inside the oil pan.

6. The electric motor cooling circulatory device of claim 4, wherein, It also includes a pressure regulating valve, which is disposed between the pump body and the heat exchanger and is used to control the pressure of the cooling medium in the delivery pipeline.

7. The electric motor cooling circulatory device according to any one of claims 1 to 6, wherein It also includes a three-way valve, which is disposed between the heat exchanger and the motor. The first end of the three-way valve is connected to the heat exchanger, the second end of the three-way valve is used to connect to the first inlet of the motor, and the third end of the three-way valve is used to connect to the second inlet of the motor.

8. The electric motor cooling circulatory device of claim 7, wherein, It also includes a first flow meter and a second flow meter, wherein the first flow meter is disposed between the first end of the three-way valve and the first inlet of the motor, and the second flow meter is disposed between the second end of the three-way valve and the second inlet of the motor.

9. An electric machine cooling system characterized by, It includes an electric motor and an electric motor cooling circulation device as described in any one of claims 1 to 8, wherein the electric motor cooling circulation device is connected to the electric motor and is used to provide a cooling medium to the electric motor.

10. The motor cooling system of claim 9, wherein, The motor is used to connect to the oil pan assembly after the inner diameter of the outlet is enlarged.

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