Motor cooling structure, motor and vehicle

Abstract

The present disclosure relates to a motor cooling structure, a motor and a vehicle, the motor cooling structure comprising: a stator core, a plurality of through holes being formed in the stator core and extending along the axial direction of the stator core, the plurality of through holes being distributed along the circumferential direction of the stator core; and a shell being sealingly arranged at both ends of the stator core, the shell being provided with a cavity, the cavity being in communication with the plurality of through holes to form a cooling channel, the cooling channel being provided with an inlet and an outlet. The present disclosure forms the cooling channel by forming the through holes in the stator core and the shells at both ends of the stator core, and the cooling liquid enters from the inlet and is discharged from the outlet to form a circulation, which is assisted by the structure of the stator core and the shell to form a complete cooling structure. After the cooling channel is filled with the cooling liquid, only a fixed flow of the cooling liquid is needed to ensure that the cooling system can circulate normally, and the heat dissipation effect of the motor system will not change, which is simple, easy to use and cost-saving.

Description

Technical Field

[0001] This disclosure relates to the field of motor cooling technology, specifically to a motor cooling structure, a motor, and a vehicle. Background Technology

[0002] In related technologies, motors in new energy vehicles generally use oil pipe spray cooling. This requires the oil pipes to be arranged at the ends of the windings, and the direction of the fuel injector orifices to be designed according to the motor's arrangement on the vehicle to control the oil flow. When the motor is in different postures (the vehicle is pitching or tilting), the cooling effect will be greatly reduced. Even if the flow control of the oil pump is increased and a variable flow method is used, it will still bring complexity and instability to the control system. Utility Model Content

[0003] The purpose of this disclosure is to provide an electric motor cooling structure, an electric motor, and a vehicle that can solve the aforementioned technical problems.

[0004] To achieve the above objectives, this disclosure provides a motor cooling structure, comprising: a stator core, wherein a plurality of through holes extending along the axial direction of the stator core are provided inside the stator core, and the plurality of through holes are distributed circumferentially along the stator core; and a housing having an opening at the center and matching the end of the stator core, the housing being sealed at both ends of the stator core, the housing having a cavity inside, the cavity communicating with the plurality of through holes to form a cooling channel, and the cooling channel having an inlet and an outlet.

[0005] Optionally, the stator core includes a yoke and teeth disposed inside the yoke, and the through hole is disposed inside the yoke.

[0006] Optionally, the through hole is provided on the portion of the yoke that is opposite to the tooth.

[0007] Optionally, the housing includes a first housing and a second housing disposed opposite to the first housing, the liquid inlet is disposed on the first housing, and the liquid outlet is disposed on the second housing.

[0008] Optionally, both the liquid inlet and the liquid outlet are provided with multiple inlets and outlets.

[0009] Optionally, at least the first housing and the second housing may have a flow divider inside the first housing to allow coolant to flow evenly into the plurality of through holes.

[0010] Optionally, the flow divider is constructed as a flow divider rib, which extends along the axial direction of the housing and is spaced apart along the circumferential direction of the housing, and a flow guiding channel corresponding to the through hole is formed between two adjacent flow dividers.

[0011] Optionally, the end of the diverting rib facing away from the stator core has a gap with the inner wall of the first housing to form a collecting cavity, and the liquid inlet communicates with the collecting cavity.

[0012] A second object of this disclosure is to provide an electric motor, including the aforementioned motor cooling structure.

[0013] A third object of this disclosure is to provide a vehicle comprising the aforementioned electric motor.

[0014] The above technical solution involves opening through holes in the stator core to form cooling channels with the shells at both ends of the stator core. Coolant enters from the inlet and exits from the outlet to form a circulation. With the help of the stator core's own structure and the shells, a complete cooling structure is formed. After the cooling channels are filled with coolant, only a fixed flow rate of coolant is needed to ensure that the cooling system can circulate normally. The heat dissipation effect of the motor system will not change. It is simple to use and saves costs.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the motor cooling structure in this disclosure;

[0018] Figure 2 This is a schematic diagram of the motor cooling structure in this disclosure, wherein the stator core is a perspective view;

[0019] Figure 3 This is a perspective view of the first housing in this disclosure;

[0020] Figure 4 This is a side view of the stator core in this disclosure.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Stator core; 101. Through hole; 102. Yoke; 103. Tooth; 2. Housing; 21. First housing; 211. Liquid inlet; 22. Second housing; 221. Liquid outlet; 23. Cavity; 231. Collecting cavity; 3. Diverter; 4. Flow guide channel. Detailed Implementation

[0023] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0024] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0025] like Figure 1-4 As shown, this disclosure provides a motor cooling structure, including: a stator core 1, with a plurality of through holes 101 extending along the axial direction of the stator core 1, the plurality of through holes 101 being distributed circumferentially along the stator core 1; and a housing 2, having an opening at the center and matching the end of the stator core 1, the housing 2 being sealed at both ends of the stator core 1, the housing 2 having a cavity 23 inside, the cavity 23 being connected to the plurality of through holes 101 to form a cooling channel, the cooling channel having an inlet 211 and an outlet 221.

[0026] Through the above technical solution, a through hole 101 is opened in the stator core 1, forming a cooling channel with the housing 2 at both ends of the stator core 1. For example, the housing 2 and the stator core 1 can be connected by crimping. The coolant enters from the inlet 211 and exits from the outlet 221 to form a circulation. The coolant is oil. With the help of the structure of the stator core 1 itself and the housing 2, a complete cooling structure is formed. After the cooling channel is filled with coolant, only a fixed flow rate of coolant is needed to ensure that the cooling system can circulate normally. The heat dissipation effect of the motor system will not change. It is simple to use and saves costs.

[0027] As an optional implementation method, such as Figure 4 As shown, the stator core 1 includes a yoke 102 and teeth 103 disposed inside the yoke 102. A through hole 101 is disposed within the yoke 102. This placement within the yoke 102 facilitates machining, and the yoke 102 has high strength, thus not affecting motor performance. The through hole 101 can be formed in one step during tooth machining. Of course, in other embodiments, the through hole 101 can also be disposed inside the teeth 103.

[0028] Optionally, such as Figure 4 As shown, the through hole 101 is provided on the part of the yoke 102 that is opposite to the tooth 103, because the part of the yoke 102 that is opposite to the tooth 103 has greater strength, thus avoiding affecting the performance of the stator core 1 itself.

[0029] As an optional implementation method, such as Figure 1-2As shown, the housing 2 includes a first housing 21 and a second housing 22 disposed opposite to the first housing 21. The first housing 21 and the second housing 22 are respectively disposed at both ends of the stator core 1. The liquid inlet 211 is disposed on the first housing 21 and the liquid outlet 221 is disposed on the second housing 22. Since the housing 2 is connected to several through holes 101, it can be ensured that all coolant can enter the through holes 101 and be discharged uniformly from the liquid outlet 221. The liquid inlet 211 and the liquid outlet 221 are disposed opposite to each other to avoid the coolant path being repeated and to ensure the maximum cooling effect.

[0030] Optionally, such as Figure 2 As shown, multiple liquid inlets 211 and liquid outlets 221 are provided to ensure the liquid inlet and outlet speeds and enhance the cooling effect.

[0031] Optionally, such as Figure 1 and Figure 3 As shown, at least one of the first housing 21 and the second housing 22 has a flow divider 3 inside the first housing 21 to allow the coolant to flow evenly into a plurality of through holes 101. The flow divider 3 is used to equalize the flow and ensure that the coolant can flow evenly into each through hole 101. Of course, the flow divider 3 can also be set in the second housing 22, which is convenient for processing and installation, and there is no need to distinguish between the inlet end and the outlet end.

[0032] Among them, such as Figure 1 and Figure 3 As shown, the flow divider 3 is constructed as a flow divider rib. The flow divider rib extends along the axial direction of the housing 2 and is spaced apart along the circumferential direction of the housing 2. A flow guide channel 4 corresponding to the through hole 101 is formed between two adjacent flow divider ribs. The number of flow divider ribs is determined according to the number of through holes 101. A flow guide channel 4 extending in the same direction as the through hole 101 is formed between two flow divider ribs. The flow divider rib can guide the coolant into the through hole, ensuring that the coolant can flow into the through hole 101 evenly to achieve the heat dissipation effect.

[0033] Optionally, such as Figure 1 As shown, there is a gap between the end of the flow divider away from the stator core 1 and the inner wall of the first housing 21 to form a collecting cavity 231. The liquid inlet 211 is connected to the collecting cavity 231. The coolant entering through the liquid inlet 211 is first concentrated in the collecting cavity 231 and then flows evenly into the guide channel 4. If the collecting cavity 231 is not provided, the coolant will only enter a certain guide channel 4 alone and cannot be evenly distributed.

[0034] The second objective of this disclosure is to provide an electric motor, including the aforementioned motor cooling structure, which, with the aid of the stator core 1 itself and the housing 2, ensures that the cooling system can circulate normally, so that the heat dissipation effect of the motor system will not change. It is simple to use and saves costs.

[0035] A third objective of this disclosure is to provide a vehicle comprising the aforementioned motor, for example, an electric vehicle, wherein the motor is a permanent magnet synchronous motor, which has advantages such as high power density, light weight and small size, making it widely used in electric vehicles.

[0036] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0038] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A motor cooling structure, characterized in that, include: A stator core, wherein a plurality of through holes extending along the axial direction of the stator core are provided inside the stator core, and the plurality of through holes are distributed along the circumference of the stator core; as well as The housing has an opening at the center that matches the end of the stator core. The housing is sealed at both ends of the stator core. The housing has a cavity inside, which is connected to several through holes to form a cooling channel. The cooling channel has an inlet and an outlet.

2. The motor cooling structure according to claim 1, characterized in that, The stator core includes a yoke and teeth disposed inside the yoke, and the through hole is disposed inside the yoke.

3. The motor cooling structure according to claim 2, characterized in that, The through hole is provided on the portion of the yoke that is opposite to the tooth.

4. The motor cooling structure according to claim 1, characterized in that, The housing includes a first housing and a second housing disposed opposite to the first housing, the liquid inlet is disposed on the first housing, and the liquid outlet is disposed on the second housing.

5. The motor cooling structure according to claim 4, characterized in that, Both the liquid inlet and the liquid outlet are provided with multiple ports.

6. The motor cooling structure according to claim 4, characterized in that, At least the first housing and the second housing are provided with a flow divider so that the coolant can flow evenly into the plurality of through holes.

7. The motor cooling structure according to claim 6, characterized in that, The flow divider is constructed as a flow divider rib, which extends along the axial direction of the housing and is spaced apart along the circumferential direction of the housing. A flow guiding channel corresponding to the through hole is formed between two adjacent flow dividers.

8. The motor cooling structure according to claim 7, characterized in that, The end of the diverting rib facing away from the stator core has a gap with the inner wall of the first housing to form a collecting cavity, and the liquid inlet communicates with the collecting cavity.

9. An electric motor, characterized in that, include: The motor cooling structure according to any one of claims 1-8.

10. A vehicle, characterized in that, include: The motor according to claim 9.

Images