CN117895691A - Motor and automobile - Google Patents

Abstract

The application relates to the field of new energy automobiles, and particularly discloses a motor and an automobile, wherein the motor comprises a shell, a rotating shaft, a rotor assembly and a stator assembly; the stator assembly comprises a solidification piece, a plurality of stator iron cores, a plurality of frameworks and a plurality of coils, wherein the solidification piece is fixedly connected with the shell, the frameworks are arranged at intervals along the circumferential direction of the rotating shaft, the stator iron cores are embedded in the frameworks in a one-to-one correspondence manner, and the coils are wound on the outer circumferential surfaces of the frameworks in a one-to-one correspondence manner; the solidifying piece wraps the frameworks and the coils so as to fix the frameworks and the coils, thereby improving the assembly efficiency and precision; the coil is wound on the outer peripheral surface of the corresponding framework along the groove, the opening of the groove is fixedly blocked under the coating of the solidified piece, and a first cooling channel is formed and used for receiving cooling liquid introduced from the outside of the stator assembly to cool the corresponding coil, so that the heat resistance can be reduced, and the heat dissipation efficiency is improved.

Description

Motor and automobile

Technical Field

The invention relates to the field of new energy automobiles, in particular to a motor and an automobile.

Background

In order to cope with the ever-increasing fuel price and the variable international petroleum form, the use of new energy sources, such as electric energy, hydrogen energy and the like, is greatly promoted in China. The new energy automobile develops most rapidly, and the final drive automobile drives a motor regardless of electric energy or hydrogen energy. Compared with the internal combustion engine used by the traditional automobile, the new energy automobile has higher requirements on the motor used by the new energy automobile.

However, the existing new energy motor mainly adopts a conventional radial magnetic flux structure, has heavy weight, large volume, lower power density and torque density compared with an axial magnetic flux motor, and is contradictory with light weight and larger riding space of the whole vehicle. At present, the axial flux motor mainly has the problems of difficult stator core coil fixation, difficult design of a heat dissipation loop, poor NVH performance and the like, so that the axial flux motor cannot be widely applied to passenger vehicles.

Disclosure of Invention

The application provides a motor and an automobile, wherein the motor is coated with a framework and a coil through a solidifying piece and is provided with a first cooling channel for heat dissipation and cooling, so that the problems can be effectively solved, and the motor is beneficial to popularization of wide and economic application of an axial flux motor on a passenger car.

In order to solve the technical problems, the application adopts a technical scheme that: the motor comprises a shell, a rotating shaft, a rotor assembly and a stator assembly; the rotating shaft penetrates through the shell; the rotor component is arranged in the shell and fixedly sleeved on the rotating shaft; the stator component is arranged in the shell, sleeved on the rotating shaft and axially opposite to the rotor component at intervals; the stator assembly comprises a solidification piece, a plurality of stator iron cores, a plurality of frameworks and a plurality of coils, wherein the solidification piece is fixedly connected with the shell, the frameworks are arranged at intervals along the circumferential direction of the rotating shaft, the stator iron cores are embedded in the frameworks in a one-to-one correspondence manner, and the coils are wound on the outer circumferential surfaces of the frameworks in a one-to-one correspondence manner; the curing piece wraps the frameworks and the coils so as to fix the frameworks and the coils; the outer peripheral surface of each framework is provided with a groove with an opening, the coil is wound on the outer peripheral surface of the corresponding framework along the groove, the opening of the groove is fixedly blocked under the coating of the solidifying piece, a first cooling channel is formed in the groove, and the first cooling channel is used for receiving cooling liquid introduced from the outside of the stator assembly to cool the corresponding coil.

The solidifying piece is provided with a second cooling channel and a third cooling channel, each first cooling channel is provided with a liquid inlet and a liquid outlet, the liquid inlets of the first cooling channels are communicated with the second cooling channel at intervals, the liquid outlets of the first cooling channels are communicated with the third cooling channel at intervals, the second cooling channel is used for receiving cooling liquid, and the cooling liquid flows out after sequentially flowing through the second cooling channel, the first cooling channel and the third cooling channel; the second cooling channel and the third cooling channel are used for further cooling the coil.

The second cooling channel and the third cooling channel are annularly arranged and surround the rotating shaft, the second cooling channel is positioned at the periphery of the third cooling channel, and the plurality of coils and the plurality of frameworks are positioned between the second cooling channel and the third cooling channel; the liquid inlets of the first cooling channels are communicated with the second cooling channels along the circumferential direction of the second cooling channels at intervals, and the liquid outlets of the first cooling channels are communicated with the third cooling channels along the circumferential direction of the third cooling channels at intervals.

The solidifying piece comprises an inner ring part and an outer ring part which encircle the rotating shaft, the outer ring part and the inner ring part are coaxially arranged, the inner ring part is arranged between the rotating shaft and a plurality of frameworks, a plurality of frameworks are arranged between the outer ring part and the inner ring part at intervals, a third cooling channel is formed in the inner ring part along the annular direction of the inner ring part, and a second cooling channel is formed in the outer ring part along the annular direction of the outer ring part.

Wherein the solidifying piece is provided with a liquid inlet; the second cooling channel is in an open-loop arrangement, and both ends of the second cooling channel are communicated with the liquid inlet and are used for receiving cooling liquid.

The solidifying piece is formed by filling thermosetting plastic into the shell and solidifying, and the third cooling channel and the second cooling channel are reserved during filling and are formed during solidifying.

The motor comprises a nozzle, the nozzle is arranged in the shell, and the spraying direction of the nozzle faces to the rotor assembly; the nozzle is used for receiving the cooling liquid and spraying the cooling liquid to the rotor assembly for cooling.

The nozzle is arranged on the solidified piece and positioned on at least one side of the solidified piece facing the rotor assembly.

The curing piece comprises an inner ring part and an outer ring part which encircle the rotating shaft, the outer ring part and the inner ring part are coaxially arranged, the inner ring part is positioned between the rotating shaft and a plurality of frameworks, and the frameworks are arranged between the outer ring part and the inner ring part at intervals; wherein the nozzle is arranged at the inner ring part; or the nozzle is arranged on the outer ring part and is positioned at the top of the outer ring part in the height direction of the motor in the use and placement state.

The solidifying piece is provided with a fourth cooling channel which is communicated with the nozzle, and the fourth cooling channel is used for receiving cooling liquid and conveying the cooling liquid to the nozzle.

The number of the rotor assemblies is two, the two rotor assemblies are opposite to each other along the axial direction of the rotating shaft and are arranged at intervals, and the stator assembly is arranged between the two rotor assemblies along the axial direction of the rotating shaft; the number of the nozzles is at least two, two sides of the curing part in the axial direction of the rotating shaft face the two rotor assemblies correspondingly, and at least one nozzle is arranged on each side.

The nozzle is arranged on the top wall of the shell in the height direction of the motor in a use and placement state.

The shell comprises an end cover which is arranged opposite to the rotor component along the axial direction of the rotating shaft, and the nozzle is arranged on the end cover or is arranged between the end cover and the rotor component and is fixed relative to the end cover.

The number of the nozzles is a plurality, and the nozzles are arranged at intervals.

The rotor assembly is provided with a plurality of through holes along the axial direction of the rotating shaft, and a plurality of channels are communicated with the two opposite sides of the rotor assembly along the axial direction of the rotating shaft.

The rotor assembly comprises a rotor iron core and a plurality of magnetic steel blocks which are annularly arranged, the rotor iron core is sleeved on the rotating shaft, a plurality of accommodating grooves are formed in the rotating shaft at intervals, and the magnetic steel blocks are fixedly embedded in the accommodating grooves in a one-to-one correspondence manner; the through holes are formed in the rotor core and/or the magnetic steel blocks.

Wherein the rotor assembly comprises a thermal firmware; the inner ring of the rotor core is provided with a weight removing ring, the rotor core is sleeved on the weight removing ring, and the weight removing ring is sleeved on the rotating shaft; the hot firmware is filled and solidified at the joint of the de-duplication ring, the magnetic steel block and the rotor core in a thermosetting mode so as to fix the rotor core, the magnetic steel block and the de-duplication ring; and a cooling air passage is arranged between the heat firmware and the magnetic steel block and between the heat firmware and the rotor core, the cooling air passage is communicated with the through hole and the outside, and the cooling air passage receives air flow from the through hole and leads the air flow to the outside.

The application also comprises a second technical scheme, and an automobile comprises an automobile body and the motor.

The automobile comprises a cooling component, wherein the cooling component stores cooling liquid and outputs the cooling liquid to cool preset parts in the automobile body; each first cooling passage communicates with the cooling assembly to receive cooling fluid from the cooling assembly.

The application has the beneficial effects that: compared with the prior art, the motor and the automobile provided by the application have the advantages that the stator assembly is filled and fixed through the solidification part, and the stator assembly is connected and fixed to the shell, so that the size of the stator assembly can be reduced, the assembly efficiency and the assembly precision are improved, meanwhile, the corresponding coil is directly cooled through the first cooling channel, the thermal resistance can be reduced, the heat dissipation efficiency is improved, and the running stability and the running reliability of the automobile are further improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a motor according to the present application;

FIG. 2 is a schematic top view of an embodiment of a stator assembly according to the present application;

FIG. 3 is a schematic cross-sectional view of the structure A-A of the embodiment of FIG. 2 of the stator assembly provided by the present application;

FIG. 4 is a schematic exploded view of the stator assembly of the embodiment of FIG. 2 in accordance with the present application;

FIG. 5 is a schematic view of another embodiment of a stator assembly provided by the present application;

FIG. 6 is a schematic structural view of a further embodiment of a stator assembly provided by the present application;

FIG. 7 is a schematic view of an embodiment of a cured part according to the present application;

fig. 8 is a schematic structural view of an embodiment of a rotor core according to the present application;

fig. 9 is a schematic structural diagram of an embodiment of a cooling system provided by the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms "first," "second," and "first," herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "several," "a plurality" means at least two, such as two, three, etc., unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1 in combination, fig. 1 is a schematic structural diagram of an embodiment of a motor according to the present application. In one aspect of the present application, an electric machine 100 is provided, the electric machine 100 comprising a housing 1, a shaft 2, a rotor assembly 3 and a stator assembly 4. The rotating shaft 2 penetrates through the shell 1; the rotor assembly 3 is arranged in the shell 1 and fixedly sleeved on the rotating shaft 2; the stator assembly 4 is arranged in the shell 1, sleeved on the rotating shaft 2, and arranged opposite to the rotor assembly 3 along the axial direction of the rotating shaft at intervals. The stator assembly 4 includes a solidified piece 41, a plurality of stator cores 42, a plurality of bobbins 43, and a plurality of coils 44. Specifically, the curing member 41 is formed by filling thermosetting plastic in the housing 1 and curing, and the curing member 41 is fixedly connected with the housing 1, so that the stator assembly 4 is tightly connected with the housing 1, the stability of the connection between the stator assembly 4 and the housing 1 can be improved, the process is simplified, and the assembly efficiency is improved. The plurality of bobbins 43 are arranged at intervals along the circumferential direction of the rotating shaft 2, the plurality of stator cores 42 are embedded in the plurality of bobbins 43 in a one-to-one correspondence manner, and the plurality of coils 44 are wound on the outer circumferential surfaces of the plurality of bobbins 43 in a one-to-one correspondence manner. The curing member 41 covers the plurality of bobbins 43 and the plurality of coils 44 to fix the plurality of bobbins 43 and the plurality of coils 44, and assembly efficiency and accuracy of the stator assembly 4 can be improved. Specifically, the outer peripheral surface of each skeleton 43 is provided with a groove with an opening, the coil 44 is wound on the outer peripheral surface of the corresponding skeleton 43 along the groove, the opening of the groove is fixedly blocked under the coating of the solidified piece 41, the first cooling channel 45 is formed, the first cooling channel 45 is used for receiving the cooling liquid introduced from the outside of the stator assembly 4 to cool the corresponding coil 44, and the first cooling channel 45 is directly contacted with and cools the coil 44, so that the heat resistance can be reduced, the heat dissipation efficiency can be improved, and the purpose of fully cooling the coil 44 can be realized.

Specifically, the curing member 41 is configured to be formed by filling thermosetting plastic in the housing 1 and curing, so that the stator assembly 4 is tightly connected with the housing 1, the overall rigidity is improved, and the modal and NVH performance are further improved.

Specifically, the motor 100 includes two rotor assemblies 3, which are disposed on opposite sides of the stator assembly 4 along the axial direction of the stator assembly 4, so as to achieve the effects of balancing heat dissipation, improving the efficiency of the motor 100, reducing electromagnetic interference, enhancing structural strength, facilitating maintenance and repair, and the like. The stator assembly 4 is filled and fixed through the curing member 41, on one hand, the curing member 41 is fixedly connected with the shell 1 to fill a gap between the stator assembly 4 and the shell 1, so that the stator assembly 4 is fixed in the shell 1, no auxiliary structure fixing member exists, and the number of structures for fixing the stator assembly 4 is reduced; on the other hand, the stator assembly 4 is formed by filling and curing the curing member 41 once, the curing member 41 coats the fixed framework 43 and the coil 44, no additional auxiliary fixed structural members are needed, the occupied volume of the stator assembly 4 can be reduced, the space utilization rate is improved, and the process is simplified.

Referring to fig. 2-4, fig. 2 is a schematic structural top view of an embodiment of a stator assembly according to the present application, fig. 3 is a schematic structural A-A section of the embodiment of fig. 2 of the stator assembly according to the present application, and fig. 4 is a schematic structural explosion of the embodiment of fig. 2 of the stator assembly according to the present application. Further, a plurality of grooves with openings can be formed in the outer peripheral surface of the framework 43, the plurality of coils 44 are correspondingly plugged with the openings of the plurality of grooves one by one, so that a plurality of first cooling channels 45 are formed, the heat dissipation resistance of the stator core 42 can be reduced after the plurality of first cooling channels 45 are communicated with cooling liquid, the plurality of first cooling channels 45 are correspondingly contacted with and cool inner rings of the plurality of coils 44 one by one, the inner rings of the coils 44 are wound on one side, close to the framework 43, of the coils 44 of the framework 43, the heat dissipation resistance of the coils 44 can be further reduced, the heat dissipation effect and the heat dissipation efficiency are improved, and the purpose of fully cooling each turn of the coils 44 is achieved.

When the motor 100 is used, vibration is inevitably generated, on one hand, the stator assembly 4 can be tightly connected with the shell 1 through the setting of the curing piece 41, and the transmission of the vibration of the rotating shaft 2 to the stator assembly 4 is improved or avoided, so that the stator assembly 4 is out of position; on the other hand, the internal structure of the stator assembly 4 can be fixed by coating the bobbin 43 and the coil 44 with the curing member 41, and the stability of the stator assembly 4 can be improved. Meanwhile, heat is generated by the vibration of the motor 100, the solidifying piece 41 wraps the framework 43 and the coil 44, the openings of the grooves on the framework 43 can be blocked, the first cooling channel 45 is formed by the grooves, the first cooling channel 45 is arranged on the framework 43 and is directly contacted with the inner ring of the coil 44, after receiving the cooling liquid introduced from the outside of the stator assembly 4, the heat resistance of the coil 44 can be reduced, the heat dissipation heat resistance of the stator core 42 can be reduced, and the heat is absorbed, so that the heat dissipation efficiency is improved, and the purpose of fully cooling the coil 44 is realized.

In another embodiment of the present application, each of the first cooling passages 45 may also correspond to a plurality of coils 44, so as to reduce the process requirements and simplify the process. In another embodiment, one coil 44 may also correspond to a plurality of cooling channels 45.

In one embodiment, the curing member 41 may comprise BMC (Bulk Molding Compound, bulk unsaturated polyester) material. In another embodiment, the cured member 41 may also comprise a thermosetting material of similar properties such as SMC (Sheet Molding Compound, sheet-like unsaturated polyester).

Referring to fig. 1 and fig. 5-6, fig. 5 is a schematic structural diagram of another embodiment of a stator assembly according to the present application, and fig. 6 is a schematic structural diagram of another embodiment of a stator assembly according to the present application. In an embodiment of the present application, the solidifying member 41 is provided with a second cooling channel 46 and a third cooling channel 47, each first cooling channel 45 has a liquid inlet 451 and a liquid outlet 452, the liquid inlet 451 of each first cooling channel 45 is communicated with the second cooling channel 46 at intervals, the liquid outlet 452 of each first cooling channel 45 is communicated with the third cooling channel 47 at intervals, the second cooling channel 46 is used for receiving cooling liquid, and the cooling liquid flows through the second cooling channel 46, the first cooling channel 45 and the third cooling channel 47 in sequence and then flows out; the second cooling passage 46 and the third cooling passage 47 serve to further cool the coil 44.

Specifically, the third cooling channel 47 and the second cooling channel 46 are reserved during filling and formed during solidification, and no additional auxiliary fixed structural members are needed, so that the process can be simplified, and the assembly efficiency can be improved.

In a specific embodiment, the structural member for clamping may be preset in the stator assembly 4, and the stator assembly 4 is filled with the curing member 41 and cured by heating, and then the structural member is taken out, and the remaining gaps respectively form the second cooling channel 46 and the third cooling channel 47, so that the coil 44 may be further cooled. In another embodiment, a meltable reserving member may be reserved in the stator assembly 4, after the solidifying member 41 is filled and heated, the solidifying member 41 is solidified and fixes the stator assembly 4, the reserving member is melted by heating, and the generated gaps form the second cooling channel 46 and the third cooling channel 47, respectively. In another embodiment, the second cooling channel 46 and the third cooling channel 47 may also be semi-open and sealed by external components. In other embodiments, the second cooling channel 46 and the third cooling channel 47 may also be formed in combination in the above manner.

Specifically, the second cooling channel 46 is communicated with the outside, and can receive the cooling liquid, after the cooling liquid enters the second cooling channel 46, a part of the cooling liquid can enter the first cooling channel 45 through the liquid inlet 451, and is in direct contact with the inner ring of the coil 44, so that the coil 44 is directly cooled, and meanwhile, another part of the cooling liquid can be in direct contact with the coil 44 and absorb part of heat of the outer ring of the coil 44, so that the coil 44 is further cooled, and the heat dissipation effect is improved. After the cooling liquid absorbs heat in the flowing manner of the first cooling channel 45, the cooling liquid can leave the first cooling channel 45 from the liquid outlet 452 and enter the third cooling channel 47, and the cooling liquid flowing into the third cooling channel 47 can directly contact the coil 44 and absorb the other part of heat of the outer ring of the coil 44, so that the coil 44 is further cooled, and the heat dissipation efficiency is improved.

Further, the second cooling channel 46 and the third cooling channel 47 are annularly arranged and are arranged around the rotating shaft 2, and in a specific embodiment, the second cooling channel 46 may be located at the periphery of the third cooling channel 47. In another embodiment, the second cooling channel 46 may also be located at the inner periphery of the third cooling channel 47. The plurality of coils 44 and the plurality of bobbins 43 are located between the second cooling passage 46 and the third cooling passage 47, and specifically, the coils 44 are wound around the bobbins 43, the outer circumference side of the coils 44 may be in direct contact with the second cooling passage 46, and the inner circumference side of the coils 44 may be in direct contact with the third cooling passage 47. The liquid inlets 451 of the first cooling passages 45 are communicated with the second cooling passage 46 at intervals along the circumferential direction of the second cooling passage 46, and the liquid outlets 452 of the first cooling passages 45 are communicated with the third cooling passage 47 at intervals along the circumferential direction of the third cooling passage 47.

Therefore, when the motor 100 is operated, a part of heat generated by the coil 44 can be absorbed by the cooling liquid in the first cooling channel 45 in direct contact with the inner ring of the coil 44, another part of heat can be absorbed by the cooling liquid in the second cooling channel 46 in contact with the outer ring of the coil 44 near the outer periphery, and another part of heat can be absorbed by the cooling liquid in the third cooling channel 47 in contact with the outer ring of the coil 44 near the inner periphery. In a specific embodiment, the outer ring of the coil 44 may be directly contacted with the second cooling channel 46 and the third cooling channel 47, respectively, so as to reduce the thermal resistance of the coil 44, improve the heat dissipation effect, and achieve the purpose of fully cooling the coil 44. In another embodiment, the solidifying member 41 may be filled between the coil 44 and the second cooling channel 46 and the third cooling channel 47, and the outer ring of the coil 44 may be in indirect contact with the second cooling channel 46 and the third cooling channel 47, respectively, so that the process may be simplified and the assembly efficiency may be improved. In other embodiments, other contact modes between the coil 44 and the second cooling channel 46 and the third cooling channel 47 are also included, and will not be described herein.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a cured member according to an embodiment of the application. Further, the cured member 41 includes an inner ring portion 411 and an outer ring portion 412 surrounding the rotation shaft 2, the outer ring portion 412 and the inner ring portion 411 being coaxially disposed. The inner ring 411 is located between the rotating shaft 2 and the plurality of bobbins 43, and can fix the relative positions of the plurality of bobbins 43 and the rotating shaft 2. The plurality of skeletons 43 are disposed between the outer ring portion 412 and the inner ring portion 411 at intervals, and the positions of the plurality of skeletons 43 can be fixed. The third cooling channel 47 is formed on the inner ring portion 411 along the circumferential direction of the inner ring portion 411, and the second cooling channel 46 is formed on the outer ring portion 412 along the circumferential direction of the outer ring portion 412, so that the volume occupied by the third cooling channel 47 and the second cooling channel 46 can be reduced, and the space utilization rate can be improved.

Specifically, the curing member 41 surrounds the inner ring portion 411 and the outer ring portion 412 of the rotating shaft 2, after the plurality of frameworks 43 are assembled to the stator assembly 4, the relative positions between the frameworks 43 and the rotating shaft 2 and between the plurality of frameworks 43 and the frameworks 43 can be fixed, so that screw-free and glue-free effects are realized, the process is simplified, the fixing effect is improved, meanwhile, an auxiliary fixing structural member is not required to be additionally arranged, the auxiliary parts are simplified, and the purposes of small occupied volume and light weight are realized.

Further, the curing member 41 is provided with a liquid inlet 461; the second cooling channel 46 is disposed in an open loop, and two ends of the second cooling channel 46 are both connected to the liquid inlet 461 for receiving the cooling liquid.

Specifically, the size of the liquid inlet 461 may be determined according to the inner diameter of the second cooling passage 46, and in a specific embodiment, the caliber of the liquid inlet 461 may be equal to the inner diameter of the second cooling passage 46, so as to achieve smooth cooling liquid delivery. In another embodiment, the caliber of the liquid inlet 461 may be larger than the inner diameter of the second cooling channel 46, so as to increase the conveying speed of the cooling liquid and improve or avoid the backflow of the cooling liquid.

In another embodiment of the present application, unlike the above embodiment, the first cooling passages 45 may be provided on the stator core 42, formed by assembling the bobbins 43, and the coils 44 are spaced apart from or fixed to the stator core 42 by an insulating, heat conductive material. In another embodiment, the first cooling passage 45 may also be provided inside the stator core 42. In another embodiment, the first cooling channel 45 may be formed by laying a conduit, which may be closed or semi-open, assembled with the structural member or coil 44.

In another embodiment of the present application, the first cooling channel 45 may also be communicated with the second cooling channel 46 and the third cooling channel 47 through a switching device, unlike the above-described embodiment. The second cooling channel 46 and the third cooling channel 47 can be sealed by corresponding matched parts after the reserved openings are solidified, or can realize functions by pre-paving open or closed pipelines. The open pipeline is required to be sealed through corresponding matched parts in the later period.

In one embodiment of the present application, the stator assembly 4 is provided with a pressure reducing through hole. In one embodiment, the pressure reducing through holes may extend through the stator assembly 4 to a region of low pressure to reduce or balance the pressure differential across the stator assembly 4. In another embodiment, the pressure reducing through holes may also conduct the gap between the two rotor assemblies 3. In other embodiments, the reduction or balancing of the pressure differential across the stator assembly 4 may also be achieved by a combination of the two.

In one embodiment of the present application, the motor 100 includes a nozzle (not shown) disposed in the housing 1, and the injection direction of the nozzle is toward the rotor assembly 3; the nozzle is used for receiving the cooling liquid and spraying the cooling liquid to the rotor assembly 3 for cooling.

Specifically, the nozzle is disposed on the solidifying member 41 and located on at least one side of the solidifying member 41 facing the rotor assembly 3, such that the nozzle can receive the cooling liquid and spray the cooling liquid toward the rotor assembly 3 for cooling.

Further, in an embodiment, a nozzle may be disposed on the inner ring 411 to directly spray the cooling liquid to the rotor assembly 3 for cooling, thereby improving the cooling effect. In another embodiment, the nozzle is disposed at the outer ring portion 412 and is located at the top of the outer ring portion 412 in the height direction of the motor 100 in the in-use placed state, so that gravity can be used to spray the rotor assembly 3, preventing leakage of the cooling liquid, and improving cooling uniformity.

Further, the solidifying member 41 is provided with a fourth cooling passage (not shown) which communicates with the nozzle, and the fourth cooling passage is for receiving the cooling liquid and delivering the cooling liquid to the nozzle.

Further, the fourth cooling passage also communicates with the second cooling passage 46 to deliver cooling fluid to the stator assembly 4 for cooling.

In an embodiment of the present application, unlike the above embodiment, the number of the nozzles is at least two, two sides of the solidifying piece 41 in the axial direction of the rotating shaft 2 face the two rotor assemblies 3 correspondingly, and each side is provided with at least one nozzle, so that the cooling liquid of the rotor assemblies 3 can be sprayed, and the purpose of sufficiently and uniformly cooling the rotor assemblies 3 is achieved.

Specifically, the rotor assembly 3 is provided with a plurality of through holes 31 along the axial direction of the rotating shaft 2, the plurality of through holes 31 are communicated with two opposite sides of the rotor assembly 3 along the axial direction of the rotating shaft 2, and the cooling liquid can reach the rotor assembly 3 through the plurality of through holes 31 and cool the rotor assembly.

Referring to fig. 1 and 8, fig. 8 is a schematic structural diagram of an embodiment of a rotor core according to the present application. Further, the rotor assembly 3 further includes a rotor core 32 and a plurality of magnetic steel blocks 33 that are annularly disposed, the rotor core 32 is sleeved on the rotating shaft 2, and a plurality of accommodating grooves are spaced apart from each other around the rotating shaft 2. Specifically, the rotor core 32 may be formed by punching, and receiving grooves for fixing the magnetic steel blocks 33 may be punched on the core, and the receiving grooves may include shallow grooves and through holes 31. The magnetic steel blocks 33 are fixedly embedded in the accommodating grooves in a one-to-one correspondence manner, and positioning can be realized through riveting or small interference. The through holes 31 may be opened in the rotor core 32 so as to penetrate the rotor core 32; the cooling liquid can be arranged on the surfaces of the rotor iron core 32 or the magnetic steel blocks 33 through the through holes 31 to cool and dissipate heat so as to realize the purpose of sufficiently and uniformly cooling the rotor assembly 3.

In a specific embodiment, the nozzles may be disposed at inner ring positions at two sides of the stator assembly 4 to spray the cooling liquid onto the surface of the magnetic steel block 33, so that the uniform heat dissipation of the surface of the magnetic steel block 33 is achieved by using the centrifugal force of the rotation of the rotor assembly 3, thereby achieving the sufficient uniform cooling of the rotor assembly 3. In another embodiment, the nozzle may be disposed on the shaft of the motor 100 to spray the cooling liquid onto the surface of the magnetic steel block 33, and achieve uniform heat dissipation by using centrifugal force. In another embodiment, the nozzle may be disposed on the top wall of the housing 1 in the height direction of the motor 100 in the in-use state, and the heat dissipation from the surface of the rotor magnet steel block 33 is achieved by using gravity. In other embodiments, a plurality of nozzles may be provided, and the plurality of nozzles may be disposed at intervals from each other, so that uniform heat dissipation on the surface of the magnetic steel block 33 is achieved through the plurality of nozzles.

In an embodiment of the present application, the housing 1 includes end caps 11 disposed opposite to the rotor assembly 3 along the axial direction of the rotating shaft 2, and the end caps 11 may protect both sides of the housing 1 along the axial direction. The nozzle may be disposed on the end cover 11, or may be disposed between the end cover 11 and the rotor assembly 3 and fixed relative to the end cover 11, so as to implement jet cooling of the rotor core 32 and indirectly cool the magnetic steel.

In one embodiment of the application, the rotor assembly 3 includes a thermal fastener 34 for filling the stationary rotor assembly 3. The inner ring of the rotor core 32 is provided with the weight removing ring 35, the rotor core 32 is sleeved on the weight removing ring 35, and the weight removing ring 35 is sleeved on the rotating shaft 2, so that unbalance in the rotating process can be reduced, and the stability is improved. The heat-fixing piece 34 is filled and solidified at the joint of the de-weight ring 35, the magnetic steel block 33 and the rotor core 32 in a thermosetting manner to fix the rotor core 32, the magnetic steel block 33 and the de-weight ring 35. The performance material of the thermal firmware 34 is similar to that of the cured member 41 of the above embodiment, and redundant description thereof is omitted.

Specifically, a cooling air duct (not shown) is provided between the heat-setting member 34 and the magnet steel block 33 and the rotor core 32, the cooling air duct communicating the through-hole 31 with the outside, the cooling air duct receiving an air flow from the through-hole 31 and leading the air flow to the outside. On the one hand, the cooling air passage can directly cool the magnetic steel block 33 through the cold air entering from the outside; on the other hand, the cooling channel can absorb the heat of the magnetic steel block 33 through the cooling liquid, gasify and lead to the outside to cool the magnetic steel block 33, namely, the circulating cold and hot air flow is generated, the heat dissipation effect and the heat dissipation efficiency are improved, and the full and uniform cooling is realized.

In an embodiment of the present application, a nozzle may be further disposed on the stator assembly 4, where the nozzle may include an opening at one end of the fourth cooling channel, and the cooling liquid is sprayed to the magnetic steel blocks 33 of the rotor assembly 3 through the nozzle, so as to further cool the magnetic steel blocks 33.

In an embodiment of the present application, an air gap is disposed between the stator assembly 4 and the rotor assembly 3, and under the condition of determining the electromagnetic performance design, the air gap can be reduced by using a thermosetting filling material, so that a better heat dissipation effect can be achieved, and the performance of the motor 100 is not affected.

In an embodiment of the present application, the motor 100 further includes a bearing 5, which is disposed on the inner ring of the stator assembly 4 and connected to the rotating shaft 2, so as to bear the vibration of the rotating shaft 2, reduce friction, and improve stability.

In another aspect of the present application, an automobile is provided, comprising a body and the motor 100 described above. Specifically, since the automobile includes the motor 100 described in the above embodiment, the motor 100 also has the beneficial effects described above, and will not be described herein.

Further, the automobile includes a cooling assembly that stores a cooling fluid and outputs the cooling fluid to cool a preset part inside the automobile body. Each of the first cooling passages 45 of the above-described embodiments may communicate with a cooling assembly to receive cooling fluid from the cooling assembly.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a cooling system according to an embodiment of the application. Further, the automobile further comprises a cooling system, wherein the cooling system is designed into an independent stator cooling loop, specifically, the cooling liquid flows from the whole automobile cooling loop to the whole automobile radiator, enters the motor 100 controller from the whole automobile radiator, flows from the motor 100 controller to the driving motor 100 stator assembly 4, and returns in the sequence and direction of the driving motor 100 stator assembly 4, the motor 100 controller, the whole automobile radiator and the whole automobile cooling loop. In other embodiments, the sequence of stator cooling circuits may include other schemes, not limited herein.

The stator cooling circuit decouples the stator cooling of the electric machine 100 from the cooling of the bearing or reducer or rotor assembly 3, facilitating targeted selection of the coolant of the stator assembly 4. Meanwhile, the direct connection between the stator cooling loop and the whole vehicle cooling system is realized, and cleaning devices such as an oil pump driving device, an oil-water exchanging device, an oil filter and the like which are arranged for cooling are reduced, so that the occupied volume and the weight are reduced.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims (19)

1. An electric machine, comprising:

A housing (1);

the rotating shaft (2) penetrates through the shell (1);

The rotor assembly (3) is arranged in the shell (1) and fixedly sleeved on the rotating shaft (2);

The stator assembly (4) is arranged in the shell (1), sleeved on the rotating shaft (2), and axially opposite to the rotor assembly (3) and arranged at intervals; the stator assembly (4) comprises a solidification piece (41), a plurality of stator iron cores (42), a plurality of frameworks (43) and a plurality of coils (44), wherein the solidification piece (41) is fixedly connected with the shell (1), the frameworks (43) are arranged at intervals along the circumferential direction of the rotating shaft (2), the stator iron cores (42) are embedded in the frameworks (43) in a one-to-one correspondence manner, and the coils (44) are wound on the outer circumferential surfaces of the frameworks (43) in a one-to-one correspondence manner; the curing member (41) coats the plurality of bobbins (43) and the plurality of coils (44) to fix the plurality of bobbins (43) and the plurality of coils (44);

The outer peripheral surface of each framework (43) is provided with a groove with an opening, the coil (44) is wound on the outer peripheral surface of the corresponding framework (43) along the groove, the opening of the groove is fixedly blocked under the coating of the solidifying piece (41), a first cooling channel (45) is formed in the groove, and the first cooling channel (45) is used for receiving cooling liquid which is introduced from the outside of the stator assembly (4) to cool the corresponding coil (44).

2. An electric machine according to claim 1, characterized in that,

The solidifying piece (41) is provided with a second cooling channel (46) and a third cooling channel (47), each first cooling channel (45) is provided with a liquid inlet (451) and a liquid outlet (452), the liquid inlets (451) of the first cooling channels (45) are communicated with the second cooling channel (46) at intervals, the liquid outlets (452) of the first cooling channels (45) are communicated with the third cooling channel (47) at intervals, the second cooling channels (46) are used for receiving cooling liquid, and the cooling liquid flows through the second cooling channels (46), the first cooling channels (45) and the third cooling channels (47) in sequence and then flows out; the second cooling channel (46) and the third cooling channel (47) are used for further cooling the coil (44).

3. An electric machine according to claim 2, characterized in that,

The second cooling channel (46) and the third cooling channel (47) are annularly arranged and are arranged around the rotating shaft (2), the second cooling channel (46) is positioned at the periphery of the third cooling channel (47), and the plurality of coils (44) and the plurality of frameworks (43) are positioned between the second cooling channel (46) and the third cooling channel (47); the liquid inlets (451) of the first cooling channels (45) are communicated with the second cooling channels (46) along the circumferential interval of the second cooling channels (46), and the liquid outlets (452) of the first cooling channels (45) are communicated with the third cooling channels (47) along the circumferential interval of the third cooling channels (47).

4. The motor of claim 3, wherein the motor is configured to control the motor,

The solidifying piece (41) comprises an inner ring part (411) and an outer ring part (412) which encircle the rotating shaft (2), the outer ring part (412) and the inner ring part (411) are coaxially arranged, the inner ring part (411) is positioned between the rotating shaft (2) and the frameworks (43), the frameworks (43) are arranged between the outer ring part (412) and the inner ring part (411) at intervals, the third cooling channel (47) is formed in the inner ring part (411) along the circumferential direction of the inner ring part (411), and the second cooling channel (46) is formed in the outer ring part (412) along the circumferential direction of the outer ring part (412).

5. The motor of claim 3, wherein the motor is configured to control the motor,

The solidification piece (41) is provided with a liquid inlet (461); the second cooling channel (46) is arranged in an open loop manner, and two ends of the second cooling channel (46) are communicated with the liquid inlet (461) for receiving cooling liquid.

6. The motor of claim 4, wherein the motor is configured to control the motor to drive the motor,

The solidifying piece (41) is arranged to be filled with thermosetting plastic and solidified in the shell (1), and the third cooling channel (47) and the second cooling channel (46) are reserved in filling and are formed in solidifying.

7. An electric machine according to claim 1, characterized in that,

The motor comprises a nozzle, the nozzle is arranged in the shell (1), and the spraying direction of the nozzle faces the rotor assembly (3); the nozzle is used for receiving the cooling liquid and spraying the cooling liquid to the rotor assembly (3) for cooling.

8. The motor of claim 7, wherein the motor is configured to control the motor to drive the motor,

The nozzle is arranged on the solidifying piece (41) and is positioned on at least one side of the solidifying piece (41) facing the rotor assembly (3).

9. The motor of claim 8, wherein the motor is configured to control the motor,

The curing member (41) comprises an inner ring part (411) and an outer ring part (412) which encircle the rotating shaft (2), the outer ring part (412) and the inner ring part (411) are coaxially arranged, the inner ring part (411) is positioned between the rotating shaft (2) and the frameworks (43), and the frameworks (43) are arranged between the outer ring part (412) and the inner ring part (411) at intervals;

wherein the nozzle is provided to the inner ring portion (411); or the nozzle is arranged on the outer ring part (412) and is positioned on the top of the outer ring part (412) in the height direction of the motor in the use and placement state.

10. The motor of claim 8, wherein the motor is configured to control the motor,

The solidifying piece (41) is provided with a fourth cooling channel which is communicated with the nozzle and is used for receiving cooling liquid and conveying the cooling liquid to the nozzle.

11. An electric machine according to any one of claims 8-10, characterized in that,

The number of the rotor assemblies (3) is two, the two rotor assemblies (3) are opposite to each other along the axial direction of the rotating shaft (2) and are arranged at intervals, and the stator assemblies (4) are arranged between the two rotor assemblies (3) along the axial direction of the rotating shaft (2); the number of the nozzles is at least two, two sides of the solidifying piece (41) in the axial direction of the rotating shaft (2) face two rotor assemblies (3) correspondingly, and at least one nozzle is arranged on each side.

12. The motor of claim 7, wherein the motor is configured to control the motor to drive the motor,

The nozzle is arranged on the top wall of the shell (1) in the height direction of the motor in a use and placement state.

13. The motor of claim 7, wherein the motor is configured to control the motor to drive the motor,

The housing (1) comprises an end cover (11) which is arranged opposite to the rotor assembly (3) along the axial direction of the rotating shaft (2), and the nozzle is arranged on the end cover (11) or between the end cover (11) and the rotor assembly (3) and is fixed relative to the end cover (11).

14. The motor of claim 7, wherein the motor is configured to control the motor to drive the motor,

The number of the nozzles is a plurality, and the nozzles are arranged at intervals.

15. An electric machine according to claim 1, characterized in that,

The rotor assembly (3) is provided with a plurality of through holes (31) along the axial direction of the rotating shaft (2), and the through holes (31) are communicated with the rotor assembly (3) along the opposite sides of the axial direction of the rotating shaft (2).

16. The motor of claim 15, wherein the motor is configured to control the motor,

The rotor assembly (3) comprises a rotor iron core (32) and a plurality of magnetic steel blocks (33) which are annularly arranged, the rotor iron core (32) is sleeved on the rotating shaft (2), a plurality of accommodating grooves are formed in a spaced mode around the rotating shaft (2), and the plurality of magnetic steel blocks (33) are fixedly embedded in the plurality of accommodating grooves in a one-to-one correspondence mode; the through holes (31) are formed in the rotor core (32) and/or the magnetic steel blocks (33).

17. The motor of claim 15, wherein the motor is configured to control the motor,

-The rotor assembly (3) comprises a thermal firmware (34); a weight removing ring (35) is arranged on the inner ring of the rotor core (32), the rotor core (32) is sleeved on the weight removing ring (35), and the weight removing ring (35) is sleeved on the rotating shaft (2); the thermosetting piece (34) is filled and cured at the joint of the de-weight ring (35), the magnetic steel block (33) and the rotor core (32) in a thermosetting mode so as to fix the rotor core (32), the magnetic steel block (33) and the de-weight ring (35);

The cooling air passage is arranged between the heat firmware (34) and the magnetic steel block (33) and between the heat firmware and the rotor core (32), and is communicated with the through hole (31) and the outside, and the cooling air passage receives air flow from the through hole (31) and leads the air flow to the outside.

18. An automobile, comprising:

a vehicle body;

the electric machine (100) of any one of claims 1-17, disposed on the vehicle body.

19. The automobile of claim 18, wherein the vehicle is a motor vehicle,

The automobile comprises a cooling assembly, wherein the cooling assembly stores cooling liquid and outputs the cooling liquid to cool preset parts in the automobile body; each of the first cooling passages (45) communicates with the cooling assembly to receive cooling fluid from the cooling assembly.