Motor and vehicle

Abstract

The invention relates to the technical field of vehicles, and provides a motor and a vehicle, the motor comprises a shell assembly, a rotor and an airflow driving member, the shell assembly forms an accommodating cavity, a liquid cooling channel and an airflow channel, the accommodating cavity communicates with the airflow channel, and a liquid medium in the liquid cooling channel and airflow in the airflow channel can perform heat exchange; at least part of the rotor is rotatably arranged in the accommodating cavity; the airflow driving part is connected with the rotor, the airflow driving part and the rotor rotate synchronously, and the airflow driving part drives airflow to sequentially flow through the containing cavity and the airflow channel. According to the motor, the airflow driving part and the rotor rotate synchronously, the airflow driving part drives the airflow to flow into the airflow channel through the containing cavity, the liquid medium in the liquid cooling channel exchanges heat with the airflow in the airflow channel, and the cooled airflow flows into the containing cavity again and takes away heat; and the cold air flow is heated again and continuously flows to the air flow channel, so that the rotor is cooled, and the heat dissipation effect is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to an electric motor and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicles, range extenders are widely used. To improve the power of range extender motors and reduce failure rates, addressing the issue of internal motor overheating has been a crucial research direction in motor technology development. Traditional motors can cool the stator, but cannot further cool the internal rotor. When the internal heat load exceeds the limits of the rotor material, the motor power cannot be further increased. Summary of the Invention

[0003] This application provides an electric motor and a vehicle capable of cooling the rotor.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a motor, the motor comprising: The housing assembly forms a receiving cavity, a liquid cooling channel, and an airflow channel. The receiving cavity is connected to the airflow channel, and the liquid medium in the liquid cooling channel and the airflow in the airflow channel can exchange heat. A rotor, at least a portion of which is rotatably disposed within the receiving cavity; An airflow drive is connected to the rotor. The airflow drive and the rotor rotate synchronously. The airflow drive drives the airflow to flow sequentially through the receiving cavity and the airflow channel.

[0005] According to the above technical means, during motor operation, the airflow drive component and the rotor rotate synchronously. The airflow drive component drives the airflow through the receiving cavity into the airflow channel. Furthermore, the liquid medium in the liquid cooling channel exchanges heat with the airflow in the airflow channel. The cooled airflow then flows back into the receiving cavity, carrying away heat, thereby cooling the rotor and improving heat dissipation. The airflow drive component can drive the airflow, improving the airflow efficiency.

[0006] In some embodiments, the motor includes: A switching valve is disposed in the airflow channel. The switching valve opens the airflow channel to allow airflow to circulate between the receiving cavity and the airflow channel; the switching valve closes the airflow channel to cut off the receiving cavity and the airflow channel.

[0007] In some embodiments, the switching valve includes: Valve core; An elastic element is connected to the valve core. The airflow and the elastic element together drive the valve core to move, thereby opening or closing the airflow passage.

[0008] In some embodiments, the housing assembly includes: A venting element forms a connecting section and a bypass section, the connecting section extending radially and the bypass section extending axially and communicating with the connecting section, the valve core being radially slidably disposed within the connecting section to open or close the bypass section.

[0009] In some embodiments, at least a portion of the airflow channel is disposed on the radially outer side of the liquid cooling channel, and at least a portion of the receiving cavity is disposed on the radially inner side of the liquid cooling channel.

[0010] In some embodiments, the rotor is sleeved on the radially outer side of the airflow drive.

[0011] In some embodiments, the airflow drive includes: Support section; A support ring is sleeved on the outer periphery of the support portion, and the rotor is sleeved on the outer periphery of the support ring; Multiple blades are arranged at circumferential intervals along the support portion, and the blades connect the support portion and the support ring.

[0012] In some embodiments, the housing assembly includes: A circumferential shell assembly having a front opening and a rear opening in the axial direction, the circumferential shell assembly forming the liquid cooling channel and the airflow channel; Front cover; The rear end cover is rotatably connected to the airflow drive component. The front end cover seals and closes the front opening, and the rear end cover seals and closes the rear opening, together defining the receiving cavity.

[0013] In some embodiments, the front end cap includes: A first air guide section is located within the receiving cavity, and the first air guide section is a truncated cone with its tip pointing towards the airflow drive member.

[0014] In some embodiments, the front end cap includes: The second air guide is located inside the receiving cavity and surrounds the first air guide, and the second air guide forms an air guide groove.

[0015] In some embodiments, the circumferential shell assembly includes: Inner shell; An intermediate shell is fitted over the inner shell, and the intermediate shell and the inner shell together define at least a portion of the liquid cooling channel; An outer shell is fitted over the intermediate shell, and the outer shell and the intermediate shell together define at least a portion of the airflow passage.

[0016] In some embodiments, the outer peripheral surface of the inner shell forms a first groove that opens radially outward, and the intermediate shell closes the first groove opening radially outward to collectively define at least a portion of the liquid cooling channel.

[0017] In some embodiments, the first groove extends spirally to form a plurality of segments spaced apart along the axial direction, the width of the flow-through section of the first groove along the axial direction is a, the wall thickness of two adjacent segments along the axial direction is b, the number of turns of the segments is n, and the length of the overlap between the stator of the motor and the first groove in the axial direction is L, wherein n×a+b≥L.

[0018] In some embodiments, the outer shell forms an inlet and an outlet, and the intermediate shell forms a first through hole and a second through hole. The first through hole connects the inlet and the beginning of the first groove, and the second through hole connects the outlet and the end of the first groove.

[0019] In some embodiments, the outer peripheral surface of the intermediate shell forms a second groove that opens radially outward, and the outer shell closes the radially outward opening of the second groove to collectively define at least a portion of the airflow passage.

[0020] Another embodiment of this application provides a vehicle, the vehicle comprising: The motor described in any of the above items; An engine, wherein the crankshaft of the engine is connected to the airflow drive component of the electric motor.

[0021] The motor provided in this application embodiment, on the one hand, in the motor's operating state, the heat generated by the rotor's rotation is transferred to the airflow. The airflow drive component rotates synchronously with the rotor, driving the airflow through the receiving cavity into the airflow channel. Furthermore, the liquid medium in the liquid-cooled channel exchanges heat with the airflow in the airflow channel. The cooled airflow then flows back into the receiving cavity, carrying away heat. The cooled airflow then reheats and continues to flow into the airflow channel, thus cycling to achieve rotor cooling and improve heat dissipation. On the other hand, the synchronous rotation of the rotor and the airflow drive component enables the airflow to be driven, improving the airflow efficiency. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a motor in some embodiments of this application, wherein the arrows indicate the direction of airflow; Figure 2 This is another partial cross-sectional view of the motor in some embodiments of this application; Figure 3 This is a schematic diagram of the circumferential shell assembly in some embodiments of this application; Figure 4This is a schematic diagram of the inner shell structure in some embodiments of this application, wherein the arrows indicate the flow direction of the liquid medium; Figure 5 This is a schematic diagram of the intermediate shell structure in some embodiments of this application, wherein the arrows indicate the direction of airflow; Figure 6 This is a schematic diagram of the airflow drive component in some embodiments of this application; Figure 7 This is a schematic diagram of the front cover structure in some embodiments of this application, wherein the arrows indicate the direction of airflow.

[0023] Wherein, 1-shell assembly; 11-circumferential shell assembly; 111-inner shell; 1110-liquid cooling channel; 1111-first groove; 112-intermediate shell; 1120-airflow channel; 1120a-inlet; 1120b-outlet; 1121-first through hole; 1122-second through hole; 1123-second groove; 113-outer shell; 1131-water inlet; 1132-water outlet; 12-front end cover; 121-first air guide; 122-second air guide; 13-rear end cover; 2-Rotor; 3-Airflow drive component; 31-Support part; 311-Mounting hole; 32-Support ring; 33-Blade; 4-Switch valve; 41-Valve core; 42-Elastic component; 43-First tube body; 5-Stator; 6-First seal; 7-Second tube body; 8-Second seal; 9-Crankshaft; 10-Sealing ring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, embodiments of the technical solutions of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of this application more clearly, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0026] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0027] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that combinations can be made in any suitable manner without contradiction; for example, different combinations of specific technical features / embodiments can form different implementations. To avoid unnecessary repetition, the various possible combinations of specific technical features / embodiments in this application will not be described separately.

[0028] It should be noted that in this application, "multiple" includes two or more.

[0029] This application provides an embodiment of a motor; please refer to [link / reference]. Figures 1 to 7 The motor includes a housing assembly 1, a rotor 2, and an airflow drive 3. The housing assembly 1 forms a receiving cavity, a liquid cooling channel 1110, and an airflow channel 1120. The receiving cavity is connected to the airflow channel 1120, and the liquid medium in the liquid cooling channel 1110 and the airflow in the airflow channel 1120 can exchange heat. At least a portion of the rotor 2 is rotatably disposed in the receiving cavity. The airflow drive 3 is connected to the rotor 2, and the airflow drive 3 and the rotor 2 rotate synchronously. The airflow drive 3 drives the airflow to flow through the receiving cavity and the airflow channel 1120 in sequence.

[0030] For example, the rotor 2 may be partially disposed within the receiving cavity, or the rotor 2 may be entirely disposed within the receiving cavity.

[0031] Both the rotor 2 and the airflow drive 3 are rotatable relative to the housing assembly 1, and the airflow drive 3 is used to drive the airflow.

[0032] It is understood that the airflow within the receiving cavity and the airflow channel 1120 is the same. The type of airflow is not limited; for example, the airflow medium includes, but is not limited to, air.

[0033] The type of liquid medium is not limited; for example, liquid media include, but are not limited to, water or oil.

[0034] The liquid cooling channel 1110 and the airflow channel 1120 are independent of each other. That is to say, the liquid cooling channel 1110 and the airflow channel 1120 are isolated from each other. The liquid medium in the liquid cooling channel 1110 will not enter the airflow channel 1120, and the airflow in the airflow channel 1120 will not enter the liquid cooling channel 1110.

[0035] The liquid cooling channel 1110 and the receiving cavity are independent of each other. That is to say, the liquid cooling channel 1110 and the receiving cavity are isolated from each other. The liquid medium in the liquid cooling channel 1110 will not enter the receiving cavity, and the airflow in the receiving cavity will not enter the liquid cooling channel 1110.

[0036] In related technologies, the motor includes a housing and a rotor body disposed within the housing. The rotor body is arranged around a rotor shaft, which is arranged to extend through the housing. Cooling air enters the rotor body axially, passes through the air passage of the rotor body, and then leaves the rotor body axially. With this design, the housing needs to be kept in contact with the external environment. The rotor body experiences system energy loss under low heat load conditions, which reduces motor efficiency.

[0037] In some embodiments, the receiving cavity and the airflow channel 1120 of this application constitute a closed circulation path. That is, neither the receiving cavity nor the airflow channel 1120 is connected to the external environment. For example, the hot airflow generated by the rotation of the rotor 2 flows into the airflow channel 1120 through the receiving cavity. Furthermore, the liquid medium in the liquid cooling channel 1110 exchanges heat with the airflow in the airflow channel 1120. The liquid medium absorbs the heat of the airflow, and the cooled airflow flows into the receiving cavity from the airflow channel 1120, carrying away the heat. The cold airflow becomes hot, and then the hot airflow continues to flow into the airflow channel 1120. This cycle is repeated to achieve the cooling of the rotor 2 and improve the heat dissipation effect.

[0038] In some embodiments, the motor further includes a stator 5, which is connected to the housing assembly 1. Specifically, the stator 5 is disposed within the receiving cavity and fixed to the circumferential surface of the receiving cavity.

[0039] The rotor 2 is fixedly connected to the airflow drive 3. For example, the rotor 2 and the airflow drive 3 can be detachably connected or non-detachably connected, etc.

[0040] In some embodiments, the rotor 2 is interference-fitted with the airflow drive 3, so that the rotor 2 and the airflow drive 3 can rotate synchronously, and the airflow drive 3 can contact the airflow and drive the airflow to flow.

[0041] The motor provided in this application embodiment, on the one hand, in the motor's operating state, the heat generated by the rotation of the rotor 2 is transferred to the airflow. The airflow drive component 3 rotates synchronously with the rotor 2, driving the airflow through the receiving cavity into the airflow channel 1120. Furthermore, the liquid medium in the liquid cooling channel 1110 exchanges heat with the airflow in the airflow channel 1120. The cooled airflow then flows back into the receiving cavity, carrying away heat. The cooled airflow then becomes hot again and continues to flow into the airflow channel 1120, thus cycling to cool the rotor 2 and improve heat dissipation. On the other hand, the synchronous rotation of the rotor 2 and the airflow drive component 3, with the airflow drive component 3 driving the airflow, improves the airflow efficiency.

[0042] In some embodiments, please refer to Figure 1 The motor includes a switching valve 4, which is disposed in the airflow channel 1120. The switching valve 4 opens the airflow channel 1120 to allow airflow to circulate between the receiving cavity and the airflow channel 1120; the switching valve 4 closes the airflow channel 1120 to cut off the receiving cavity and the airflow channel 1120.

[0043] Here, the switching valve 4 can open or close the airflow channel 1120 according to the pressure in the airflow channel 1120. When the speed of the rotor 2 is lower than the threshold, the switching valve 4 can be closed, the cooling cycle is disconnected, the airflow resistance loss is reduced, the energy consumption of the entire system is reduced, and the motor efficiency is improved. When the speed of the rotor 2 reaches the threshold or above, the heat load is high, and the switching valve 4 can be opened, the cooling cycle is started, the motor heat load is reduced, and the motor power is improved.

[0044] For example, when the rotor 2 speed is below the threshold, such as at low to medium speed, the pressure in the airflow channel 1120 is small, and cooling is not required. The switching valve 4 is in the closed state, and the receiving cavity and the airflow channel 1120 are cut off. When the rotor 2 speed increases to or above the threshold, such as at medium to high speed, the rotor 2 load increases, and cooling is required to improve motor efficiency. The switching valve 4 is in the open state, the airflow channel 1120 is opened, and the airflow circulates between the receiving cavity and the airflow channel 1120, absorbing heat through the liquid medium to improve the heat dissipation effect.

[0045] In some embodiments, the switching valve 4 can be an electrically controlled valve, and the control device controls the closing of the switching valve 4 according to the pressure in the airflow channel 1120.

[0046] In some embodiments, the airflow drives the switching valve 4 to open or close the airflow passage 1120. That is, the switching valve 4 can be a pneumatic valve.

[0047] For example, when the rotor 2 speed is below the threshold, such as at low to medium speed, the thrust of the airflow drive 3 is small, the pressure in the airflow channel 1120 is small, and there is no need for cooling. The switch valve 4 is in the closed state, and the receiving cavity and the airflow channel 1120 are cut off. When the rotor 2 speed increases to or above the threshold, such as at medium to high speed, the rotor 2 load increases, and cooling is required to improve motor efficiency. The thrust of the airflow drive 3 increases, and the pressure in the airflow channel 1120 continuously increases, which can push the switch valve 4 to switch to the open state. The switch valve 4 opens the airflow channel 1120, and the cold airflow flows into the receiving cavity from the airflow channel 1120 and takes away the heat. The cold airflow becomes hot, and then the hot airflow continues to flow into the airflow channel 1120. This cycle is repeated to achieve the cooling of the rotor 2 and improve the heat dissipation effect.

[0048] Here, the switching valve 4 can open or close according to the pressure change of the airflow. For example, when the pressure of the airflow channel 1120 reaches the threshold, it will automatically open, and when the pressure of the airflow channel 1120 drops below the threshold, it will automatically close. In this way, the airflow channel 1120 and the receiving cavity can be cut off and connected. The switching valve 4 can selectively guide the flow channel to achieve the purpose of cooling the rotor 2 without external control equipment. The structure is simple.

[0049] In some embodiments, please refer to Figure 1 The switching valve 4 includes a valve core 41 and an elastic element 42. The elastic element 42 is connected to the valve core 41. The airflow and the elastic element 42 together drive the valve core 41 to move, so as to open or close the airflow passage 1120.

[0050] For example, when the pressure in the airflow channel 1120 reaches a threshold, the airflow drives the valve core 41 to move and causes the elastic element 42 to undergo elastic deformation to open the airflow channel 1120. When the pressure in the airflow channel 1120 drops below the threshold, the elastic element 42 restores its elastic deformation to drive the valve core 41 back to its initial position to close the airflow channel 1120, thus achieving cooling of the internal rotor 2 of the motor without the need for external control equipment.

[0051] The type of elastic element 42 is not limited. For example, elastic element 42 includes, but is not limited to, springs, such as tension springs or compression springs.

[0052] In some embodiments, housing assembly 1 includes a vent forming a connecting section and a bypass section, the connecting section extending radially and the bypass section extending axially and communicating with the connecting section, and valve core 41 being radially slidably disposed within the connecting section to open or close the bypass section.

[0053] It is understandable that both the connecting section and the bypass section are part of the airflow channel 1120.

[0054] Under the combined action of airflow and elastic element 42, valve core 41 reciprocates linearly in the radial direction, thereby blocking or avoiding the ports of bypass section and connecting section.

[0055] Valve core 41 blocks the ports of the bypass section and the connecting section to close the bypass section, thereby closing the airflow passage 1120.

[0056] Valve core 41 avoids the ports of the bypass section and the connecting section to open the bypass section, thereby opening the airflow passage 1120.

[0057] In some embodiments, the elastic element 42 may be disposed at the end of the valve core 41 that is radially away from the rotor 2. The elastic element 42 may be a compression spring.

[0058] For example, when the pressure in the airflow channel 1120 reaches the threshold, the airflow drives the valve core 41 to slide radially away from the rotor 2 and press against the elastic element 42. The valve core 41 avoids the ports of the bypass section and the connecting section. At this time, the bypass section is opened, and the airflow flows from the connecting section to the bypass section, and then enters the receiving cavity to cool the rotor 2. As cold airflow continuously enters the receiving cavity and takes away the heat, the hot airflow in the airflow channel 1120 exchanges heat with the liquid medium to become cold airflow. This cycle is repeated to achieve heat dissipation and cooling. When the pressure in the airflow channel 1120 drops below the threshold, the elastic element 42 restores its elastic deformation to drive the valve core 41 to slide radially towards the rotor 2, blocking the ports of the bypass section and the connecting section to close the bypass section, thereby closing the airflow channel 1120.

[0059] In some embodiments, please refer to Figure 1 The switching valve 4 includes a first tube 43, a valve core 41 and an elastic element 42, both of which are disposed inside the first tube 43. The first tube 43 is connected to the housing assembly 1.

[0060] In some embodiments, the first end of the first tube 43 is inserted into the connecting section, and the opening of the first end of the first tube 43 is connected to the connecting section, while the second end of the first tube 43 is closed.

[0061] In some embodiments, the first tube 43 is hermetically inserted into the connecting section. Exemplarily, the gap between the first tube 43 and the connecting section is sealed by a first seal 6.

[0062] For example, the first sealing element 6 is sleeved on the outside of the first end of the first tube body 43, and the first sealing element 6 seals against the wall of the connecting section.

[0063] The shape of the first seal 6 is not limited; for example, the first seal 6 can be a sealing ring.

[0064] The number of first seals 6 is unlimited; there can be one or more first seals 6. Multiple first seals 6 can be distributed radially at intervals.

[0065] It should be noted that, unless otherwise stated, in the embodiments of this application, the axial direction refers to the direction of the rotation axis of the rotor 2, the radial direction is the direction perpendicular to the axial direction, and the circumferential direction is the circumferential direction around the axial direction.

[0066] In some embodiments, please refer to Figures 1 to 2 At least a portion of the airflow channel 1120 is disposed on the radially outer side of the liquid cooling channel 1110, and at least a portion of the receiving cavity is disposed on the radially inner side of the liquid cooling channel 1110.

[0067] For example, a portion of the airflow channel 1120 is disposed on the radial outer side of the liquid cooling channel 1110, and another portion of the airflow channel 1120 is disposed on one side of the axial direction of the liquid cooling channel 1110.

[0068] For example, the airflow channel 1120 may be entirely located on the radial outer side of the liquid cooling channel 1110.

[0069] For example, a portion of the receiving cavity is disposed on the radial inner side of the liquid cooling channel 1110, and another portion of the receiving cavity is disposed on one side of the axial direction of the liquid cooling channel 1110.

[0070] For example, the receiving cavity may be entirely located on the radial inner side of the liquid cooling channel 1110.

[0071] In this embodiment, at least a portion of the airflow channel 1120 is disposed on the radially outer side of the liquid cooling channel 1110, and at least a portion of the receiving cavity is disposed on the radially inner side of the liquid cooling channel 1110. This increases the heat dissipation area of ​​the liquid cooling channel 1110 and improves the heat dissipation effect.

[0072] In related technologies, the rotor body forms an air channel by stacking, but the air channel is axial. The rotation of the rotor body causes shearing of the airflow, affecting the axial flow of air.

[0073] In some embodiments, please refer to Figure 1 The rotor 2 is mounted on the radial outer side of the airflow drive component 3.

[0074] For example, the rotor 2 is interference-fitted with the airflow drive 3.

[0075] In this embodiment, the rotor 2 is sleeved on the radial outer side of the airflow drive component 3, and the stator 5 can surround the outer periphery of the rotor 2 to avoid the airflow drive component 3 interfering with the cooperation between the rotor 2 and the stator 5. It can also reduce the shearing of the airflow axial flow by the rotation of the rotor 2 and improve the airflow efficiency.

[0076] In some embodiments, please refer to Figure 1 and Figure 6 The airflow drive component 3 includes a support part 31, a support ring 32 and multiple blades 33. The support ring 32 is sleeved on the outer periphery of the support part 31, and the rotor 2 is sleeved on the outer periphery of the support ring 32. The multiple blades 33 are arranged at intervals along the circumference of the support part 31, and the blades 33 connect the support part 31 and the support ring 32.

[0077] For example, the support part 31 provides the main support for the airflow drive 3. When the rotor 2 rotates, the support ring 32 contacts the rotor 2 to prevent the blades 33 from directly contacting the rotor 2. Multiple blades 33 can directly drive the airflow. The blades 33 can also be used to support the support ring 32 and the support part 31.

[0078] The shape of the support ring 32 is not limited; for example, the support ring 32 is generally annular.

[0079] The shape of the support portion 31 is not limited; for example, the support portion 31 is generally cylindrical.

[0080] The number of blades 33 can be set according to requirements. For example, eight blades 33 are evenly spaced along the axial direction in the support part 31. Of course, more or fewer blades 33 can be set, which will not be elaborated in this application.

[0081] The shape of the blade 33 is not limited. For example, the blade 33 can be generally square block-shaped, or it can be other fan blade shapes that can drive the airflow axially.

[0082] In this embodiment, the airflow drive 3 can drive the airflow to flow axially through the blades 33.

[0083] In some embodiments, please refer to Figures 1 to 2 The housing assembly 1 includes a circumferential housing group 11, a front cover 12, and a rear cover 13. The circumferential housing group 11 has a front opening and a rear opening in the axial direction, forming a liquid cooling channel 1110 and an airflow channel 1120. The airflow drive 3 is rotatably connected to the rear cover 13. The front cover 12 seals and closes the front opening, and the rear cover 13 seals and closes the rear opening, so as to jointly define the receiving cavity.

[0084] The airflow drive 3 can rotate relative to the rear end cover 13. For example, the airflow drive 3 can be rotatably connected to the rear end cover 13 via a rotary bearing.

[0085] In some embodiments, the rear end cover 13 and the circumferential shell assembly 11 can be fixedly connected. For example, a detachable connection or a non-detachable connection can be used. Detachable connections include, but are not limited to, stud connections or bolt connections. Taking the bolt connection between the circumferential shell assembly 11 and the rear end cover 13 as an example, this improves the ease of disassembly and installation of the rear end cover 13 and the circumferential shell assembly 11.

[0086] In some embodiments, the front cover 12 and the circumferential shell assembly 11 can be fixedly connected. For example, a detachable connection or a non-detachable connection can be used. Detachable connections include, but are not limited to, stud connections or bolt connections. Taking the bolt connection between the circumferential shell assembly 11 and the front cover 12 as an example, this improves the ease of disassembly and installation of the front cover 12 and the circumferential shell assembly 11.

[0087] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 7 The front cover 12 includes a first air guide 121, which is located in the receiving cavity. The first air guide 121 is a truncated cone with its tip pointing towards the airflow drive member 3.

[0088] For example, the airflow drive 3 drives the airflow to flow axially towards the front end cover 12, and the airflow diffuses to the circumferential edge under the guidance of the first air guide 121.

[0089] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 7 The front cover 12 includes a second air guide 122, which is located inside the receiving cavity and surrounds the first air guide 121. The second air guide 122 forms an air guide groove.

[0090] Here, the airflow diffuses to the circumferential edge under the guidance of the first air guide 121, and then enters the air guide groove, where the airflow is guided to flow along a set trajectory.

[0091] In some embodiments, the air guide groove extends spirally, which can buffer large airflows.

[0092] In some embodiments, the rotation direction of the air guide groove is consistent with the rotation direction of the rotor 2, so that the airflow can be guided to enter the inlet 1120a of the airflow channel 1120.

[0093] In some embodiments, the tail end of the air guide trough is connected to the airflow channel 1120 via an inlet 1120a. Exemplarily, with a plane perpendicular to the axial direction as the projection plane, the projection of the tail end opening of the air guide trough lies within the projection range of the inlet 1120a of the airflow channel 1120. Guided by the air guide trough, the airflow enters the inlet 1120a of the airflow channel 1120 from the tail end opening of the air guide trough.

[0094] For example, the first air guide 121 guides the airflow to diffuse radially to the air guide groove, and the airflow is gathered and guided through the air guide groove to enter the inlet 1120a of the airflow channel 1120 from the tail end opening of the air guide groove, thereby improving the heat dissipation efficiency.

[0095] The shape of the inlet 1120a is not limited. For example, the shape of the inlet 1120a can be fan-shaped, and the width of the inlet 1120a on the side facing the air guide groove is greater than the width of the inlet 1120a on the side away from the air guide groove.

[0096] In some embodiments, please refer to Figures 1 to 5 The circumferential shell assembly 11 includes an inner shell 111, an intermediate shell 112, and an outer shell 113. The intermediate shell 112 is fitted outside the inner shell 111, and the intermediate shell 112 and the inner shell 111 together define at least a portion of the liquid cooling channel 1110. The outer shell 113 is fitted outside the intermediate shell 112, and the outer shell 113 and the intermediate shell 112 together define at least a portion of the airflow channel 1120.

[0097] In some embodiments, the stator 5 is fixed to the inner circumferential surface of the inner shell 111. For example, the inner circumferential surface of the inner shell 111 and the outer circumferential surface of the stator 5 are interference-fitted to improve the stability of the motor structure.

[0098] In some embodiments, the inner circumferential surface of the intermediate shell 112 and the outer circumferential surface of the inner shell 111 are fitted with a clearance, and the end face fit gap is connected by stir welding to ensure the airtightness of the liquid cooling channel 1110.

[0099] In some embodiments, the position of the airflow channel 1120 formed on the outer peripheral surface of the intermediate shell 112 at least partially overlaps with the position of the liquid cooling channel 1110 formed on the outer peripheral surface of the inner shell 111, which can make full use of the heat dissipation area of ​​the liquid cooling channel 1110, resulting in a larger cooling area and stronger cooling airflow capability.

[0100] In some embodiments, the inner circumferential surface of the outer shell 113 is interference-fitted with the outer circumferential surface of the intermediate shell 112 to ensure reliable connection.

[0101] In this embodiment, a liquid cooling channel 1110 and an airflow channel 1120 are formed by the combination of an inner shell 111, an intermediate shell 112, and an outer shell 113. This increases the heat dissipation area of ​​the liquid cooling channel 1110 and reduces the processing difficulty of the inner shell 111, the intermediate shell 112, and the outer shell 113. The inner shell 111, the intermediate shell 112, and the outer shell 113 can be manufactured separately. This facilitates the installation and disassembly of the shell assembly 1. If there is local damage, only the damaged part needs to be replaced, thus saving costs.

[0102] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4 The outer peripheral surface of the inner shell 111 forms a first groove 1111 that opens radially outward, and the intermediate shell 112 closes the first groove 1111 that opens radially outward, so as to collectively define at least a portion of the liquid cooling channel 1110.

[0103] For example, the intermediate shell 112 and the inner shell 111 are both sidewalls of the liquid cooling channel 1110. The intermediate shell 112 closes the radially outward opening of the first groove 1111, and the space between the intermediate shell 112 and the first groove 1111 is at least a portion of the liquid cooling channel 1110. The first groove 1111 is located radially outward of the receiving cavity, and the airflow in the receiving cavity can exchange heat with the liquid medium in the first groove 1111 through the inner shell 111.

[0104] In some embodiments, the first groove 1111 may extend spirally to increase the flow path of the liquid medium and improve the cooling effect.

[0105] In some embodiments, the first end and the last end of the first groove 1111 are isolated. That is, the first end and the last end of the first groove 1111 are not connected. The liquid medium can enter from the first end of the first groove 1111, flow along the first groove 1111, and then exit from the last end of the first groove 1111.

[0106] The liquid cooling channel 1110 is not connected to the receiving cavity. In some embodiments, neither the beginning nor the end of the first groove 1111 penetrates the front and rear faces of the inner shell 111 in the axial direction.

[0107] The first groove 1111 contains a liquid medium for cooling the airflow in the airflow channel 1120.

[0108] In some embodiments, the first groove 1111 extends spirally to form a plurality of segments spaced apart along the axial direction. The width of the flow-through section of the first groove 1111 along the axial direction is a, the wall thickness of two adjacent segments along the axial direction is b, the number of turns of the segments is n, and the length of the overlapping part of the stator 5 of the motor and the first groove 1111 in the axial direction is L, where n×a+b≥L.

[0109] For example, n×a+b≥L increases the heat dissipation area of ​​the liquid cooling channel 1110 in the housing assembly 1, improving the cooling effect on the airflow and thus improving the heat dissipation effect.

[0110] In some embodiments, the flow-through cross-section of the first groove 1111 is rectangular in shape, and the radial depth of the flow-through cross-section of the first groove 1111 is c, where a is approximately 6 times c.

[0111] In some embodiments, the second groove 1123 extends spirally to form a plurality of segments spaced apart along the axial direction. The width of the flow section of the second groove 1123 along the axial direction is d, the wall thickness of two adjacent segments along the axial direction is e, the number of turns of the segments is m, and the length of the overlapping part of the stator 5 of the motor and the second groove 1123 in the axial direction is P, where m×d+e≥P.

[0112] For example, m×d+e≥P increases the flow area of ​​airflow within the airflow channel 1120, thereby improving the heat dissipation effect.

[0113] In some embodiments, the flow-through cross-section of the second groove 1123 is rectangular in shape, and the radial depth of the flow-through cross-section of the second groove 1123 is f, where d is approximately 6 times f.

[0114] There is no limit to the number of laps in a segment; for example, a segment can have two or more laps.

[0115] Here, a complete circle around the axis is defined as a segment, and two incomplete arc segments near the beginning and end are counted together as a segment.

[0116] In some embodiments, please refer to Figures 1 to 5 The outer shell 113 forms an inlet 1131 and an outlet 1132, and the middle shell 112 forms a first through hole 1121 and a second through hole 1122. The first through hole 1121 connects the inlet 1131 and the beginning of the first groove 1111, and the second through hole 1122 connects the outlet 1132 and the end of the first groove 1111.

[0117] In some embodiments, please refer to Figures 2 to 5 The motor includes a second tube 7, which is installed at the water inlet 1131. Specifically, the second tube 7 passes through the water inlet 1131 and the first through hole 1121, and extends to the first end of the first groove 1111. Both ends of the second tube 7 are open to facilitate the connection of an external water inlet pipe, thereby allowing external liquid media to enter the liquid cooling channel 1110 through the water inlet pipe and the second tube 7.

[0118] In some embodiments, please refer to Figures 2 to 5 The second tube 7 is sealed and inserted into the inlet 1131 and the first through hole 1121. Exemplarily, the second seal 8 seals the gap between the surface of the second tube 7 and the inlet 1131, and seals the gap between the surface of the second tube 7 and the first through hole 1121.

[0119] In some embodiments, the motor includes a third tube body installed at the outlet 1132. Specifically, the third tube body passes through the outlet 1132 and the second through hole 1122, and extends to the tail end of the first groove 1111. Both opposite ends of the third tube body are open to facilitate the connection of an external drain pipe, thereby enabling the liquid medium in the liquid cooling channel 1110 to be discharged to the outside of the motor through the third tube body and the drain pipe.

[0120] In some embodiments, the third tube is hermetically inserted into the outlet 1132 and the second through hole 1122. Exemplarily, the gap between the surfaces of the third tube and the outlet 1132, and the gap between the surfaces of the third tube and the second through hole 1122 are sealed by a third seal.

[0121] In some embodiments, the centerline of the inlet 1131 coincides with the centerline of the first through hole 1121.

[0122] In some embodiments, the rotation axis of the rotor 2 extends horizontally, with the horizontal plane as the projection plane, and the projection of the first through hole 1121 is located within the projection range of the water inlet 1131.

[0123] In some embodiments, the centerline of the outlet 1132 coincides with the centerline of the second through hole 1122.

[0124] In some embodiments, the rotation axis of rotor 2 extends horizontally, with the horizontal plane as the projection plane, and the projection of the second through hole 1122 is located within the projection range of the outlet 1132.

[0125] The shape of the second seal 8 is not limited; for example, the second seal 8 can be a sealing ring.

[0126] The number of second seals 8 is not limited; exemplarily, there may be one or more second seals 8. Multiple second seals 8 are distributed radially at intervals.

[0127] The shape of the third seal is not limited; for example, the second seal 8 can be a sealing ring.

[0128] The number of third seals is not limited; for example, there may be one or more second seals 8. Multiple second seals 8 are distributed radially at intervals.

[0129] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 5 The outer peripheral surface of the intermediate shell 112 forms a second groove 1123 that opens radially outward, and the outer shell 113 closes the second groove 1123 that opens radially outward, so as to collectively define at least a portion of the airflow passage 1120.

[0130] For example, the intermediate shell 112 and the outer shell 113 are both sidewalls of the airflow channel 1120. The outer shell 113 closes the radially outward opening of the second groove 1123, and the space between the outer shell 113 and the second groove 1123 is at least a portion of the airflow channel 1120. The second groove 1123 is located radially outward of the liquid flow channel, and the liquid medium in the liquid flow channel can exchange heat with the airflow in the second groove 1123 through the intermediate shell 112.

[0131] In some embodiments, the second groove 1123 may extend spirally to increase the airflow path and improve the cooling effect.

[0132] In some embodiments, the first and last ends of the second groove 1123 are isolated. That is, the first and last ends of the second groove 1123 are not connected. Airflow can enter from the first end of the second groove 1123, flow along the second groove 1123, and then exit from the last end of the second groove 1123.

[0133] In some embodiments, the first end of the second groove 1123 penetrates the front end face of the intermediate shell 112 in the axial direction, and the first end of the second groove 1123 communicates with the receiving cavity.

[0134] In some embodiments, the tail end of the second groove 1123 does not penetrate the axial rear end face of the intermediate shell 112. The tail end of the second groove 1123 does not directly connect to the receiving cavity.

[0135] In some embodiments, the first through hole 1121 may be located at the tail end of the second groove 1123.

[0136] In some embodiments, the second through hole 1122 may be located at the beginning of the second groove 1123.

[0137] In some embodiments, the vent is located approximately on one side of the line connecting the inlet 1131 and the outlet 1132, so that the vent, the inlet 1131 and the outlet 1132 are roughly triangularly distributed and intersect to form a T-shape.

[0138] In some embodiments, the airflow direction in the airflow channel 1120 is opposite to the flow direction of the liquid medium in the liquid cooling channel 1110. Specifically, the flow direction of the liquid medium in the first groove 1111 is opposite to the flow direction of the airflow in the second groove 1123. Airflow enters airflow channel 1120 from inlet 1120a and exits airflow channel 1120 from outlet 1120b. The flow direction of the liquid medium is opposite to that of the airflow, i.e., it flows in the opposite direction. Specifically, the liquid medium flows into liquid cooling channel 1110 through the first through hole 1121, which can be located at the tail end of the second groove 1123. The airflow from outlet 1120b first contacts the liquid medium at inlet 1131. The liquid medium flows out of liquid cooling channel 1110 through the second through hole 1122, which can be located at the head end of the second groove 1123. The airflow from inlet 1120a first contacts the liquid medium at outlet 1132, which can increase the temperature difference between airflow channel 1120 and liquid cooling channel 1110. As liquid medium continuously flows in from inlet 1131, the hot airflow becomes cold, improving heat exchange efficiency.

[0139] In some embodiments, the first groove 1111 may at least partially overlap with the second groove 1123. In this way, the airflow channel 1120 may be arranged to at least partially overlap with the liquid cooling channel 1110, which can make full use of the heat dissipation area of ​​the liquid cooling channel 1110, resulting in a larger cooling area and stronger cooling airflow capability.

[0140] Another embodiment of this application provides a vehicle; please refer to [link / reference]. Figure 1 The vehicle includes a motor and an engine provided in any embodiment of this application, wherein the crankshaft 9 of the engine is connected to the airflow drive component 3 of the motor.

[0141] Here, the crankshaft 9 of the engine drives the airflow drive component 3 to rotate the rotor 2, and the motor is a range extender motor. For example, after the engine starts, the motor switches to generator mode, converting mechanical energy into electrical energy, which is then rectified or inverted by the controller to supply the drive motor or charge the power battery.

[0142] In some embodiments, please refer to Figure 1 and Figure 6 The crankshaft 9 is fixedly connected to the support portion 31, for example, it can be a detachable connection or a non-detachable connection. Exemplarily, the support portion 31 is provided with multiple mounting holes 311, and fasteners pass through the crankshaft 9 of the engine and the mounting holes 311, connecting the crankshaft 9 to the support portion 31. Specifically, the fasteners include, but are not limited to, bolts or screws, etc., thus facilitating the installation and removal of the crankshaft 9 and the airflow drive component 3. The crankshaft 9 of the engine drives the airflow drive component 3 and the rotor 2 to rotate together, thereby driving the blades 33 to direct the airflow direction towards the front cover 12.

[0143] In some embodiments, please refer to Figure 1 The rear end cover 13 forms an assembly hole, and a sealing ring 10 is provided between the engine crankshaft 9 and the assembly hole. The crankshaft 9 rotates relative to the rear end cover 13, and the sealing ring 10 achieves a seal between the crankshaft 9 and the rear end cover 13.

[0144] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. An electric motor, characterized in that, The motor includes: The housing assembly forms a receiving cavity, a liquid cooling channel, and an airflow channel. The receiving cavity is connected to the airflow channel, and the liquid medium in the liquid cooling channel and the airflow in the airflow channel can exchange heat. A rotor, at least a portion of which is rotatably disposed within the receiving cavity; An airflow drive is connected to the rotor. The airflow drive and the rotor rotate synchronously. The airflow drive drives the airflow to flow sequentially through the receiving cavity and the airflow channel.

2. The motor according to claim 1, characterized in that, The motor includes: A switching valve is disposed in the airflow channel. The switching valve opens the airflow channel to allow airflow to circulate between the receiving cavity and the airflow channel; the switching valve closes the airflow channel to cut off the receiving cavity and the airflow channel.

3. The motor according to claim 2, characterized in that, The switching valve includes: Valve core; An elastic element is connected to the valve core. The airflow and the elastic element together drive the valve core to move, thereby opening or closing the airflow passage.

4. The motor according to claim 3, characterized in that, The housing assembly includes: A venting element forms a connecting section and a bypass section, the connecting section extending radially and the bypass section extending axially and communicating with the connecting section, the valve core being radially slidably disposed within the connecting section to open or close the bypass section.

5. The motor according to claim 1, characterized in that, At least a portion of the airflow channel is disposed on the radially outer side of the liquid cooling channel, and at least a portion of the receiving cavity is disposed on the radially inner side of the liquid cooling channel.

6. The motor according to claim 1, characterized in that, The rotor is sleeved on the radially outer side of the airflow drive component.

7. The motor according to claim 6, characterized in that, The airflow driving component includes: Support section; A support ring is sleeved on the outer periphery of the support portion, and the rotor is sleeved on the outer periphery of the support ring; Multiple blades are arranged at circumferential intervals along the support portion, and the blades connect the support portion and the support ring.

8. The motor according to claim 1, characterized in that, The housing assembly includes: A circumferential shell assembly having a front opening and a rear opening in the axial direction, the circumferential shell assembly forming the liquid cooling channel and the airflow channel; Front cover; The rear end cover is rotatably connected to the airflow drive component. The front end cover seals and closes the front opening, and the rear end cover seals and closes the rear opening, together defining the receiving cavity.

9. The motor according to claim 8, characterized in that, The front end cover includes: A first air guide section is located within the receiving cavity, and the first air guide section is a truncated cone with its tip pointing towards the airflow drive member.

10. The motor according to claim 9, characterized in that, The front end cover includes: The second air guide is located inside the receiving cavity and surrounds the first air guide, and the second air guide forms an air guide groove.

11. The motor according to claim 9, characterized in that, The circumferential shell assembly includes: Inner shell; An intermediate shell is fitted over the inner shell, and the intermediate shell and the inner shell together define at least a portion of the liquid cooling channel; An outer shell is fitted over the intermediate shell, and the outer shell and the intermediate shell together define at least a portion of the airflow passage.

12. The motor according to claim 11, characterized in that, The outer peripheral surface of the inner shell forms a first groove that opens radially outward, and the intermediate shell closes the opening of the first groove radially outward, together defining at least a portion of the liquid cooling channel.

13. The motor according to claim 12, characterized in that, The first groove extends spirally to form a plurality of segments spaced apart along the axial direction. The width of the flow-through section of the first groove along the axial direction is a, the wall thickness of two adjacent segments along the axial direction is b, the number of turns of the segments is n, and the length of the overlapping part of the stator of the motor and the first groove in the axial direction is L, where n×a+b≥L.

14. The motor according to claim 12, characterized in that, The outer shell forms an inlet and an outlet, and the middle shell forms a first through hole and a second through hole. The first through hole connects the inlet and the beginning of the first groove, and the second through hole connects the outlet and the end of the first groove.

15. The motor according to claim 11, characterized in that, The outer peripheral surface of the intermediate shell forms a second groove that opens radially outward, and the outer shell closes the second groove opening radially outward to collectively define at least a portion of the airflow passage.

16. A vehicle, characterized in that, The vehicles include: The motor according to any one of claims 1 to 15; An engine, wherein the crankshaft of the engine is connected to the airflow drive component of the electric motor.

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