Motor, power assembly and vehicle

Abstract

The invention discloses a motor, a power assembly and a vehicle, the motor is provided with a first outer flow channel and an inner flow channel, the motor further comprises a shell, a stator iron core, a first collector ring and a second collector ring, a liquid inlet is formed in the shell, and the stator iron core is provided with the inner flow channel. The winding is arranged on the stator core and is provided with a first winding part and a second winding part. A first confluence space is formed in the first collector ring, and the first winding part is contained in the first confluence space. A second confluence space is formed in the second confluence ring, the second winding part is contained in the second confluence space, the first outer flow channel extends in the axial direction of the stator iron core, and the liquid inlet communicates with the first confluence space through the first outer flow channel. According to the technical scheme of the invention, the motor is provided with the first outer flow channel and the inner flow channel, so that the cooling of the shell and the stator core is considered while the winding cooling is completed, and the cooling effect of the cooling liquid on the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation, and in particular to a motor, a power assembly and a vehicle. Background Art

[0002] The motor generates a lot of heat during operation, which will affect the normal use of the motor. In order to dissipate the heat of the motor winding, in the relevant technology, a slip ring is installed on both sides of the stator core of the motor, and the end of the winding is set inside the slip ring. When the coolant flows into the slip ring from the liquid inlet of the motor, the coolant can be collected in the slip ring and infiltrate the end of the winding inside the slip ring, thereby reducing the temperature of the motor winding.

[0003] However, this heat dissipation method can only dissipate heat for the windings, but lacks effective heat dissipation means for the stator core and motor housing where heat is also accumulated. Summary of the invention

[0004] The purpose of the present invention is to provide a motor, a powertrain and a vehicle, aiming to solve the problem of unbalanced flow of motor coolant in the related art.

[0005] To achieve the purpose of the present invention, in a first aspect, the present invention provides a motor, the motor comprising:

[0006] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the first outer flow channel;

[0007] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and the inner flow channel is disposed in the stator core and passes through the first end face and the second end face;

[0008] A winding, arranged on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0009] a first collector ring, arranged in the installation cavity, the first collector ring forming a first collector space, the first winding portion being accommodated in the first collector space, the first outer flow channel extending along the axial direction of the stator core, the liquid inlet being connected to the first collector space via the first outer flow channel;

[0010] The second slip ring is arranged in the installation cavity. The second slip ring forms a second slip space. The second winding portion is accommodated in the second slip space.

[0011] In a possible implementation manner, the housing and the outer circumferential surface of the stator core are arranged to form the first outer flow channel.

[0012] In a possible implementation, the shell forms the first outer flow channel, and the first outer flow channel and the installation cavity are spaced apart.

[0013] In a possible implementation, the liquid inlet is connected to the second confluence space via the first outer flow channel.

[0014] In a possible implementation, the liquid inlet is connected to a middle portion of the first outer flow channel.

[0015] In a possible implementation, the distance between the liquid inlet and the side of the first slip ring facing the liquid inlet is A, the distance between the liquid inlet and the side of the second slip ring facing the liquid inlet is B, and A=B.

[0016] In a possible implementation, the first outer flow channel is connected to a first position of the first confluence space; the inner flow channel is connected to a second position of the first confluence space;

[0017] The first position and the second position are spaced apart along the circumferential direction of the first confluence space, and an arc connecting the first position and the second position along the circumferential direction of the first confluence space is C, and 8π / 9≤C≤8π / 7.

[0018] In a possible implementation, the second confluence space is provided with a liquid outlet, the liquid outlet is connected to a third position of the second confluence space, and the inner flow channel is connected to a fourth position of the second confluence space;

[0019] The third position and the fourth position are spaced apart along the circumferential direction of the second confluence space, and the arc of a line connecting the third position and the fourth position along the circumferential direction of the second confluence space is D, and 8π / 9≤D≤8π / 7.

[0020] In a possible implementation, the stator core is provided with a plurality of inner flow channels, and the inner flow channels are arranged at intervals along the circumference of the stator core.

[0021] In a possible implementation, the outer surface of the stator core has a second outer flow channel recessed along the radial direction of the stator core; the second outer flow channel is connected to the liquid inlet.

[0022] In a possible implementation manner, the second outer flow channel is extended along the circumferential direction of the stator core.

[0023] In a possible implementation, the outer surface of the stator core has a third outer flow channel recessed in the radial direction of the stator core, and the second outer flow channel is connected to the first confluence space through the third outer flow channel; and / or

[0024] The second outer flow channel is connected to the second confluence space through the third outer flow channel.

[0025] In a second aspect, the present invention provides a power assembly, the power assembly comprising a motor, the motor comprising:

[0026] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the first outer flow channel;

[0027] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and the inner flow channel is disposed in the stator core and passes through the first end face and the second end face;

[0028] A winding, arranged on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0029] a first collector ring, arranged in the installation cavity, the first collector ring forming a first collector space, the first winding portion being accommodated in the first collector space, the first outer flow channel extending along the axial direction of the stator core, the liquid inlet being connected to the first collector space via the first outer flow channel;

[0030] The second slip ring is arranged in the installation cavity. The second slip ring forms a second slip space. The second winding portion is accommodated in the second slip space.

[0031] In a third aspect, the present invention provides a vehicle, the vehicle comprising a powertrain, the powertrain comprising a motor, the motor comprising:

[0032] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the first outer flow channel;

[0033] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and the inner flow channel is disposed in the stator core and passes through the first end face and the second end face;

[0034] A winding, arranged on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0035] a first collector ring, arranged in the installation cavity, the first collector ring forming a first collector space, the first winding portion being accommodated in the first collector space, the first outer flow channel extending along the axial direction of the stator core, the liquid inlet being connected to the first collector space via the first outer flow channel;

[0036] The second slip ring is arranged in the installation cavity. The second slip ring forms a second slip space. The second winding portion is accommodated in the second slip space.

[0037] The technical solution of the present invention is to set a first outer flow channel and an inner flow channel in the motor, wherein the first outer flow channel is formed by the shell or the shell and the stator core, and the inner flow channel is formed by the stator core. The coolant can flow into the first confluence space through the liquid inlet and the first outer flow channel, and flow into the second confluence space through the inner flow channel, thereby completing the cooling of the first winding part and the second winding part in the first confluence space and the second confluence space. At the same time, when the coolant flows through the first outer flow channel and the inner flow channel, the coolant can contact the shell and the stator core constituting the first outer flow channel and the inner flow channel, and take away the heat on the surface of the shell and the stator core, thereby achieving the cooling of the shell and the stator core. In this way, while completing the cooling of the winding, the cooling of the shell and the stator core is also taken into account, thereby improving the cooling effect of the coolant on the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A cross-sectional view of an embodiment of a motor provided by the present application;

[0040] Figure 2 for Figure 1 A schematic structural diagram of a second embodiment of the first outer flow channel;

[0041] Figure 3 for Figure 1 A schematic structural diagram of a third embodiment of the first outer flow channel;

[0042] Figure 4 for Figure 1 A schematic diagram of the positions of the first outer flow channel and the inner flow channel at the first confluence ring;

[0043] Figure 5 for Figure 1 Schematic diagram of the location of the inner flow channel and the liquid outlet at the second confluence ring;

[0044] Figure 6 for Figure 1 A schematic diagram of the flow of the coolant in the inner flow channel according to another embodiment;

[0045] Figure 7 for Figure 1Schematic diagram of the flow of the cooling liquid in the second outer flow channel;

[0046] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the stator core;

[0047] Fig. 9 for Figure 1 A schematic structural diagram of another embodiment of the stator core;

[0048] Fig.10 for Figure 1 Schematic diagram of the flow of coolant in the third outer flow channel.

[0049] Description of reference numerals:

[0050] 100-motor;

[0051] 1-housing, 11-installation cavity, 12-liquid inlet;

[0052] 2- stator core;

[0053] 3-winding, 31-first winding portion, 32-second winding portion;

[0054] 4-first conduit ring, 41-first conduit space;

[0055] 5-second confluence ring, 51-second confluence space, 52-liquid outlet;

[0056] 6-Inner flow channel;

[0057] 7- first outer flow channel;

[0058] 8-second outer flow channel, 81-protrusion, 811-first protrusion, 812-second protrusion;

[0059] 9- The third external flow channel. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0062] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0063] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0064] The present invention provides a vehicle, which can be a fuel vehicle, an electric vehicle, or a hybrid vehicle. The vehicle can be a car, a truck, or a forklift, which is not limited by the present invention.

[0065] The vehicle includes a vehicle body, wheels, and a power assembly. The vehicle body serves as a supporting frame of the vehicle and is used to support and connect various parts of the vehicle. The wheels are rotatably connected to the vehicle, and the number of wheels can be set to two, three, or four, which is not limited in the present invention.

[0066] The powertrain is housed in the vehicle body and is connected to the wheels through axles. The powertrain is used to drive the wheels to rotate, thereby driving the vehicle to move. The powertrain includes a motor and a reducer. The motor is the power source of the powertrain and is used to provide power for the rotation of the wheels. The reducer is connected between the motor and the wheels. The reducer is used to control the torque of the motor acting on the wheels, thereby controlling the wheel speed and ultimately controlling the vehicle's travel speed.

[0067] The vehicle further includes a cooling device, which includes a hydraulic pump, a radiator, and a pipeline. The hydraulic pump, the radiator, and the motor are interconnected through the pipeline. A coolant flows in the pipeline, and the coolant may be cooling water or cooling oil, which is not limited in the present invention. The coolant may circulate between the motor and the radiator under the drive of the hydraulic pump, thereby realizing a cooling cycle for the motor.

[0068] Please refer to Figure 1 and Figure 2 The motor 100 includes a housing 1, a rotor (not shown) and a stator. The housing 1 is used as a supporting frame of the motor 100 to support and connect the various parts of the motor 100. The housing 1 can be rectangular, square, or other regular or irregular shapes, which is not limited by the present invention. The housing 1 is formed with a mounting cavity 11.

[0069] The stator is arranged in the installation cavity 11, and the stator includes a stator core 2 and a winding 3. The stator core 2 is fixedly connected to the cavity wall of the installation cavity 11, and the stator core 2 has a first end face and a second end face that are arranged opposite to each other. Stator slots are arranged in the stator core 2, and the winding 3 is installed in the stator slots. The winding 3 has a first winding portion 31 protruding from the first end face and a second winding portion 32 protruding from the second end face. The winding 3 is connected to an external circuit through the first winding portion 31 and the second winding portion 32 to convert the electrical energy of the external circuit into magnetic energy and generate a first magnetic field.

[0070] The rotor is rotatably arranged in the stator core 2, and the rotor includes a rotating shaft and a permanent magnet. The rotating shaft is rotatably arranged in the installation cavity 11, and at least one end of the rotating shaft protrudes outside the housing 1 to be connected to the reducer. The permanent magnet is sleeved on the rotating shaft, and the permanent magnet is used to generate a second magnetic field that can interact with the first magnetic field, thereby driving the rotating shaft to rotate.

[0071] During operation of the motor 100, the winding 3 of the motor 100, especially the first winding part 31 and the second winding part 32 of the winding 3 connected to the external circuit, generates a large amount of heat, which may affect the normal use of the motor 100. To cool the motor 100, the housing 1 of the motor 100 is provided with a liquid inlet 12, which is connected to the mounting cavity 11.

[0072] The motor 100 also includes a first slip ring 4 and a second slip ring 5. The first slip ring 4 is arranged on one side of the first end face of the stator core 2, and the second slip ring 5 is arranged on one side of the second end face of the stator core 2. The area between the first slip ring 4 and the first end face forms a first slip space 41, and the area between the second slip ring 5 and the second end face forms a second slip space 51. The first winding portion 31 is arranged in the first slip space 41, and the second winding portion 32 is arranged in the second slip space 51.

[0073] In the related art, a liquid inlet 12 is provided on the first confluence space 41 and the second confluence space 51, and the cooling liquid can enter the first confluence space 41 and the second confluence space 51 through the liquid inlet 12, thereby completing the immersion cooling of the first winding part 31 and the second winding part 32 in the first confluence space 41 and the second confluence space 51.

[0074] However, this heat dissipation method can only dissipate heat for the windings, but lacks effective heat dissipation means for the stator core 2 where heat is also accumulated.

[0075] To solve the above problems, in the present invention, the motor 100 also has a first outer flow channel 7 and an inner flow channel 6. The inner flow channel 6 is arranged on the stator core 2 and passes through the first end face and the second end face. The first outer flow channel 7 extends along the axial direction of the stator core 2, and the liquid inlet 12 is connected to the first confluence space 41 via the first outer flow channel 7.

[0076] The technical solution of the present invention is to set a first outer flow channel 7 and an inner flow channel 6 in the motor 100, wherein the first outer flow channel 7 is formed by the housing 1 or the housing 1 and the stator core 2, and the inner flow channel 6 is formed by the stator core 2. The coolant can flow into the first confluence space 41 through the liquid inlet 12 and the first outer flow channel 7, and flow into the second confluence space 51 through the inner flow channel 6, thereby completing the cooling of the first winding part 31 and the second winding part 32 in the first confluence space 41 and the second confluence space 51. At the same time, when the coolant flows through the first outer flow channel 7 and the inner flow channel 6, the coolant can contact the housing 1 and the stator core 2 constituting the first outer flow channel 7 and the inner flow channel 6, and take away the heat on the surface of the housing 1 and the stator core 2, thereby achieving the cooling of the housing 1 and the stator core 2. In this way, while completing the cooling of the winding, the cooling of the housing 1 and the stator core 2 is also taken into account, thereby improving the cooling effect of the coolant on the motor 100.

[0077] Hereinafter, the cooling channel of the motor 100 of the present invention will be described in detail with reference to the accompanying drawings.

[0078] Please refer to Figure 1 and Figure 2 The motor 100 has a liquid inlet 12, a first confluence space 41 and a second confluence space 51. The liquid inlet 12 is formed on the housing 1. One end of the liquid inlet 12 is connected to the hydraulic pump, and the other end is connected to the mounting cavity 11. The coolant can flow into the motor 100 from the liquid inlet 12.

[0079] The first confluence space 41 is formed between the first confluence ring 4 and the first end face, and the second confluence space 51 is formed between the second confluence ring 5 and the second end face. The first confluence space 41 accommodates the first winding portion 31, and the second confluence space 51 accommodates the second winding portion 32. The coolant can flow into the first confluence space 41 and the second confluence space 51 from the liquid inlet 12. The first confluence space 41 and the second confluence space 51 are used to converge the coolant, thereby increasing the contact area between the coolant and the first winding portion 31 and the second winding portion 32, extending the contact time between the coolant and the first winding portion 31 and the second winding portion 32, and improving the cooling effect of the coolant on the first winding portion 31 and the second winding portion 32.

[0080] The motor 100 also has a first outer flow channel 7, which is connected between the liquid inlet 12 and the first confluence space 41. The coolant can flow into the first confluence space 41 through the liquid inlet 12 and the first outer flow channel 7. At the same time, when the coolant flows through the first outer flow channel 7, the coolant can contact the shell 1 or the stator core 2 constituting the first outer flow channel 7, thereby taking away the heat of the shell 1 and the stator core 2.

[0081] There are many ways for the motor 100 to form the first outer flow channel 7. Figure 1In one embodiment of the present invention, the stator core 2 is spaced apart from the cavity wall of the installation cavity 11, and the outer peripheral surface of the stator core 2 and the inner wall surface of the installation cavity 11 of the housing 1 are arranged to form a first outer flow channel 7. In this way, on the one hand, the stator core 2 is spaced apart from the cavity wall of the installation cavity 11, which can reduce the difficulty of installing the stator core 2 and the installation cavity 11 and improve the assembly efficiency of the stator core 2 and the housing 1. On the other hand, when the coolant flows from the first outer flow channel 7 into the first confluence space 41, the coolant can contact the housing 1 and the stator core 2 at the same time, and take away the heat of the housing 1 and the stator core 2 at the same time, thereby improving the heat dissipation efficiency of the coolant for the motor 100.

[0082] Please refer to Figure 2 In another embodiment of the present invention, the first outer flow channel 7 can also be formed by the shell 1 alone. Specifically, in this embodiment, the shell 1 has an interlayer, which constitutes the first outer flow channel 7, and the first outer flow channel 7 and the installation cavity 11 are arranged at intervals. In this way, on the one hand, since the first outer flow channel 7 and the installation cavity 11 are arranged at intervals, an independent heat dissipation channel is formed. This means that when the coolant flows through the first outer flow channel 7, it can focus on the heat dissipation of the shell 1 without being disturbed by other components in the installation cavity 11, thereby improving the heat dissipation efficiency of the shell 1. On the other hand, since there is no need to set a gap between the shell 1 and the stator core 2 to form the first outer flow channel 7, under this structure, the inner wall surface of the shell 1 and the stator core 2 can be completely fitted, thereby reducing the structural weakening caused by the gap or void between the stator core 2 and the shell 1, thereby enhancing the structural strength of the shell 1. At the same time, the fitting arrangement of the shell 1 and the stator core 2 also reduces the thermal resistance between the shell 1 and the stator core 2 in disguised form. The heat generated by the stator core 2 can be transferred to the housing 1 more effectively and quickly dissipated through the coolant in the first outer flow channel 7, thereby improving the heat dissipation performance of the motor 100.

[0083] Please refer to Figure 3 In one embodiment of the present invention, the liquid inlet 12 is connected to the second confluence space 51 through the first outer flow channel 7. When the coolant flows into the installation cavity 11 from the liquid inlet 12, part of the coolant will flow into the first confluence space 41 through the first outer flow channel 7 on one side, and the other part of the coolant will flow into the second confluence space 51 through the first outer flow channel 7 on the other side. This part of the coolant will be mixed with the high-temperature coolant in the second confluence space 51, so as to further reduce the temperature difference between the first confluence space 41 and the second confluence space 51, and improve the uniformity of the coolant heat dissipation for the winding 3.

[0084] When the first outer flow channel 7 is connected with the first confluence space 41 and the second confluence space 51, the liquid inlet 12 is arranged in the middle of the first outer flow channel 7. It should be noted that the middle refers to that the distance between the axis of the liquid inlet 12 and the side of the first confluence ring 4 facing the liquid inlet 12 is A, and the distance between the axis of the liquid inlet 12 and the side of the second confluence ring 5 facing the liquid inlet 12 is B. When the absolute value of AB is 0≤|AB|≤2mm, the liquid inlet 12 is arranged in the middle of the first outer flow channel 7. At this time, the coolant flow rate of the coolant flowing from the liquid inlet 12 into the first confluence space 41 and the second confluence space 51 remains relatively balanced, so as to reduce the temperature difference of the coolant in the first confluence space 41 and the second confluence space 51, and improve the uniformity of the heat dissipation of the coolant to the winding 3. In particular, when A=B, the temperature difference of the coolant in the first confluence space 41 and the second confluence space 51 is the smallest, and the heat dissipation uniformity of the winding 3 is the best.

[0085] The motor 100 also has an inner flow channel 6, which is arranged in the stator core 2 and passes through the first end face and the second end face. The coolant in the first confluence space 41 can flow to the second confluence space 51 through the inner flow channel 6. The arrangement of the inner flow channel 6, on the one hand, can increase the contact area between the coolant and the stator core 2. When the coolant flows to the second confluence space 51 through the inner flow channel 6, the coolant can contact the stator core 2 constituting the inner flow channel 6 and take away the heat of the stator core 2, thereby improving the heat dissipation effect of the coolant on the stator core 2. On the other hand, when the coolant flows from the liquid inlet 12 through the first outer flow channel 7 to the first confluence space 41 and the second confluence space 51 respectively, since the liquid inlet 12 is arranged in the middle of the first outer flow channel 7, under ideal conditions, the coolant is usually evenly divided into the first confluence space and the second confluence space. However, in actual operation, due to the limitations of the processing accuracy of the motor 100 or the assembly accuracy of the motor 100 and the pipeline, the coolant cannot be evenly distributed into the first confluence space 41 and the second confluence space 51 after flowing out of the liquid inlet 12. This also leads to differences in the flow rate of the coolant between different confluence rings, thereby affecting the uniformity of the coolant cooling the stator of the motor 100 and affecting the cooling effect of the coolant.

[0086] The inner flow channel 6 is provided so that the first confluence space 41 and the second confluence space 51 are interconnected, and the coolant in the first confluence space 41 can flow into the second confluence space 51 through the inner flow channel 6, and the coolant in the second confluence space 51 can also flow back into the first confluence space 41 through the inner flow channel 6. In this way, the coolant flow rates of the first confluence space 41 and the second confluence space 51 are balanced, the heat dissipation uniformity of the coolant for the first winding portion 31 and the second winding portion 32 is improved, and the heat dissipation effect of the coolant is improved.

[0087] The inner flow channel 6 may be provided with one or more channels, and the present invention does not limit this. Figure 4In one embodiment of the present invention, the inner flow channel 6 is provided as one, and the first outer flow channel 7 is connected to the first position of the first confluence space 41; the inner flow channel 6 is connected to the second position of the first confluence space 41, the first position and the second position are arranged at intervals along the circumference of the first confluence space 41, and the arc of the first position and the second position connected along the circumference of the first confluence space 41 is C, 8π / 9≤C≤8π / 7. The connecting position of the first outer flow channel 7 and the first confluence space 41 is arranged diagonally or nearly diagonally to the connecting position of the inner flow channel 6 and the first confluence space 41, so that after the coolant flows into the first confluence space 41 from the first outer flow channel 7, the coolant needs to flow through the entire first confluence space 41 before it can flow into the second confluence space 51 from the inner flow channel 6. In this way, the residence time of the coolant in the first confluence space 41 is increased, and the cooling effect of the coolant on the first winding portion 31 is improved.

[0088] Please refer to Figure 5 Correspondingly, in order to further improve the cooling effect of the coolant on the winding 3, the motor 100 is also provided with a liquid outlet 52, and the coolant can flow out of the second confluence ring 5 from the liquid outlet 52. The liquid outlet 52 is connected to the third position of the second confluence space 51, and the inner flow channel 6 is connected to the fourth position of the second confluence space 51. The third position and the fourth position are arranged at intervals along the circumference of the second confluence space 51, and the arc of the line connecting the third position and the fourth position along the circumference of the second confluence space 51 is D, 8π / 9≤D≤8π / 7. The connection position of the inner flow channel 6 and the second confluence space 51 is diagonally or nearly diagonally arranged with the connection position of the liquid outlet 52 and the second confluence space 51, so that after the coolant flows into the second confluence space 51 from the inner flow channel 6, the coolant needs to flow through the entire second confluence space 51 before it can flow out of the second confluence space 51 from the liquid outlet 52. In this way, the residence time of the coolant in the second confluence space 51 is increased, thereby improving the cooling effect of the coolant on the second winding portion 32 .

[0089] Please refer to Figure 6 It can be understood that in other embodiments of the present invention, the inner flow channel 6 can also be set to multiple. For details, please refer to Figure 5 In this embodiment, the stator core 2 is provided with a plurality of inner flow channels 6, which are arranged at intervals along the circumference of the stator core 2. The coolant in the first confluence space 41 can flow into the second confluence space 51 along all directions of the stator core 2, so as to increase the flow speed of the coolant to the second confluence space 51, increase the circulation speed of the coolant in the first confluence space 41 and the second confluence space 51, and improve the heat dissipation effect of the coolant on the motor 100. At the same time, the plurality of inner flow channels 6 can also increase the contact area between the coolant and the stator core 2, and improve the heat dissipation effect of the coolant on the stator core 2.

[0090] Please refer to Figure 7The motor 100 also has a second outer flow channel 8, which is formed between the stator core 2 and the wall of the mounting cavity 11. The second outer flow channel 8 is connected to the liquid inlet 12. The coolant can flow into the second outer flow channel 8 through the liquid inlet 12 and the first outer flow channel 7. The second outer flow channel 8 can be formed by the stator core 2 being recessed toward the side of the cavity wall away from the mounting cavity 11, or by the cavity wall of the mounting cavity 11 being recessed toward the side away from the stator core 2, and the present invention does not limit this. In one embodiment of the present invention, the outer peripheral surface of the stator core 2 is recessed inward to form a groove, and the groove and the cavity wall of the mounting cavity 11 are surrounded to form the second outer flow channel 8. With such a configuration, on the one hand, it is possible to avoid providing a groove on the housing 1, which affects the supporting strength of the housing 1. On the other hand, the groove can increase the contact area between the coolant and the stator core 2, thereby improving the cooling effect of the coolant on the stator core 2.

[0091] Please refer to Figure 8 In one embodiment of the present invention, the groove is extended along the circumference of the stator core 2, so that the coolant can flow along the entire circumference of the stator core 2, thereby increasing the contact area between the coolant and the stator core 2 and improving the cooling effect of the coolant on the stator core 2.

[0092] Please refer to Fig. 9 A protrusion 81 is provided in the groove, and the protrusion 81 is used to divert the coolant flowing in the second outer flow channel 8, so as to increase the disturbance of the coolant in the second outer flow channel 8, form turbulence in the coolant in the second outer flow channel 8, increase the contact area between the coolant and the stator core 2, and improve the heat dissipation effect of the coolant on the stator core 2.

[0093] In one embodiment of the present invention, the protrusion 81 includes a first protrusion 811 and a second protrusion 812, and the first protrusion 811 and the second protrusion 812 are staggered along the axial direction of the stator core 2. The staggered first protrusion 811 and the second protrusion 812 can more effectively destroy the laminar flow state of the coolant flow, so that more complex turbulence is generated in the coolant, thereby enhancing the rate and efficiency of heat transfer of the coolant.

[0094] Please refer to Fig.10The motor 100 also has a third outer flow channel 9, which is formed by the side of the stator core 2 facing away from the first outer flow channel 7 and the cavity wall of the installation cavity 11. The third outer flow channel 9 can be formed by the outer peripheral surface of the stator core 2 and the cavity wall of the installation cavity 11, or by the concave surface of the stator core 2 after being concave in the radial direction and the cavity wall of the installation cavity 11. The present invention does not limit this. The second outer flow channel 8 is connected to the first confluence space 41 through the third outer flow channel 9. The coolant can flow into the first confluence space 41 through the liquid inlet 12, the first outer flow channel 7, the second outer flow channel 8, and the third outer flow channel 9. In this way, while further increasing the contact area between the coolant and the stator core 2, the cooling circulation of the coolant in the second outer flow channel 8 and the first confluence space 41 is realized.

[0095] The second outer flow channel 8 can also be connected to the second confluence space 51 through the third outer flow channel 9, and the coolant can flow into the second confluence space 51 through the liquid inlet 12, the first outer flow channel 7, the second outer flow channel 8, and the third outer flow channel 9. In this way, the cooling circulation of the coolant in the second outer flow channel 8 and the first confluence space 41 can also be realized.

[0096] It can be understood that in other possible embodiments of the present invention, the second external flow channel 8 can also be connected to the first confluence space 41 and the second confluence space 51 at the same time through the third external flow channel 9, so as to balance the coolant flow rate of the first confluence space 41 and the second confluence space 51, reduce the coolant temperature difference between the first confluence space 41 and the second confluence space 51, improve the cooling uniformity of the coolant on the first winding portion 31 and the second winding portion 32, and improve the cooling effect of the coolant on the motor 100.

[0097] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0098] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A motor, characterized in that: The motor has a first outer flow channel and an inner flow channel, and the motor further comprises: A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the first outer flow channel; A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and the inner flow channel is disposed in the stator core and passes through the first end face and the second end face; A winding, arranged on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface; a first collector ring, arranged in the installation cavity, the first collector ring forming a first collector space, the first winding portion being accommodated in the first collector space, the first outer flow channel extending along the axial direction of the stator core, the liquid inlet being connected to the first collector space via the first outer flow channel; The second slip ring is arranged in the installation cavity. The second slip ring forms a second slip space. The second winding portion is accommodated in the second slip space.

2. The motor according to claim 1, characterized in that The housing and the outer peripheral surface of the stator core are arranged to form the first outer flow channel.

3. The motor according to claim 1, characterized in that The shell forms the first outer flow channel, and the first outer flow channel and the installation cavity are spaced apart.

4. The motor according to claim 1, characterized in that The liquid inlet is connected to the second confluence space via the first outer flow channel.

5. The motor according to claim 1, characterized in that The liquid inlet is connected to the middle portion of the first outer flow channel.

6. The motor according to claim 5, characterized in that The distance between the liquid inlet and the side of the first slip ring facing the liquid inlet is A, and the distance between the liquid inlet and the side of the second slip ring facing the liquid inlet is B, and A=B.

7. The motor according to claim 1, characterized in that The first outer flow channel is connected to a first position of the first confluence space; the inner flow channel is connected to a second position of the first confluence space; The first position and the second position are spaced apart along the circumferential direction of the first confluence space, and an arc connecting the first position and the second position along the circumferential direction of the first confluence space is C, and 8π / 9≤C≤8π / 7.

8. The motor according to claim 7, characterized in that The second confluence space is provided with a liquid outlet, the liquid outlet is connected to the third position of the second confluence space, and the inner flow channel is connected to the fourth position of the second confluence space; The third position and the fourth position are spaced apart along the circumferential direction of the second confluence space, and the arc of a line connecting the third position and the fourth position along the circumferential direction of the second confluence space is D, and 8π / 9≤D≤8π / 7.

9. The motor according to claim 1, characterized in that The stator core is provided with a plurality of inner flow channels, and the inner flow channels are arranged at intervals along the circumferential direction of the stator core.

10. The motor according to claim 1, characterized in that The outer surface of the stator core has a second outer flow channel recessed along the radial direction of the stator core; the second outer flow channel is connected to the liquid inlet.

11. The motor according to claim 10, characterized in that The second outer flow channel is extended along the circumferential direction of the stator core.

12. The motor according to claim 11, characterized in that The outer surface of the stator core has a third outer flow channel recessed in the radial direction of the stator core, and the second outer flow channel is connected to the first confluence space through the third outer flow channel; and / or The second outer flow channel is connected to the second confluence space through the third outer flow channel.

13. A powertrain, characterized in that: Comprising a motor as described in any one of claims 1-12.

14. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 13.

Images