CN215452623U - Motor, heat conduction structure for motor heat dissipation and automobile - Google Patents

Abstract

The application provides a motor, includes: casing, stator, winding and heat conduction structure. The stator is cylindrical and is fixed on the inner side of the shell, an opening is formed in the end portion of the stator along the axial direction, and a clamping groove is formed in the inner wall of the stator. The winding comprises a winding middle part embedded in the stator clamping groove and a winding end part extending from the winding middle part to the outer side of the stator through the opening of the stator. The heat conduction structure comprises a first annular heat conduction pipe, a second annular heat conduction pipe and at least two connecting pipes, the first annular heat conduction pipe is arranged in an annular space of the second annular heat conduction pipe and is communicated with the second annular heat conduction pipe through the at least two connecting pipes, the first annular heat conduction pipe surrounds the end portion of the winding and can conduct heat with the end portion of the winding, and the second annular heat conduction pipe is fixedly connected with the shell and can conduct heat. The application also provides a heat conduction structure and car for the motor heat dissipation. The application provides a motor, through setting up the first annular heat pipe that encircles winding tip and increase heat radiating area.

Description

Motor, heat conduction structure for motor heat dissipation and automobile

Technical Field

The application relates to the technical field of motors, in particular to a motor, a heat conduction structure for motor heat dissipation and an automobile.

Background

When the motor works, current needs to be introduced into the winding to drive the motor to run, so that the winding can generate a large amount of heat, and in order to not influence the power density of the motor, the winding needs to be radiated.

In the existing motor, the heat dissipation process of the winding is to conduct heat to the stator through the contact with the stator, and the stator conducts the heat to the shell and dissipates through the shell. However, the winding and the stator are filled with an insulating material, and are not in direct contact, so that heat of the winding is not easy to dissipate by conducting to the stator, and particularly, the winding end portion extending out of the stator is not in contact with the stator due to the fact that the winding end portion extends out of the stator relative to other portions of the winding, which are in contact with the stator through the insulating material, so that heat is not easy to dissipate, and the temperature of the winding end portion relative to other portions of the winding is higher, and therefore, an effective heat dissipation mode needs to be provided for the winding end portion.

However, the heat conduction structure in the prior art is difficult to lead out the heat at the end of the winding, and the utilization rate of the heat conduction pipe is low.

Disclosure of Invention

For solving above-mentioned technical problem, this application provides a motor, be used for radiating heat conduction structure of motor and car, through setting up the first annular heat pipe that encircles winding overhang, the area of contact of increase heat pipe and winding overhang, and increase heat radiating area to promote winding overhang's radiating effect.

The present application provides in a first aspect an electric machine comprising: casing, stator, winding and heat conduction structure. The stator is cylindric, is fixed in the inboard of casing, the stator has the opening along axial tip, the inner wall of stator is provided with the draw-in groove. The winding comprises a winding middle part and a winding end part, the winding middle part is embedded in a clamping groove of the stator, and the winding end part extends from the winding middle part to the outer side of the stator through an opening of the stator. The heat conducting structure comprises a first annular heat conducting pipe, a second annular heat conducting pipe and at least two connecting pipes, wherein the outer diameter of the first annular heat conducting pipe is smaller than the inner diameter of the second annular heat conducting pipe, the first annular heat conducting pipe is arranged in the annular space of the second annular heat conducting pipe, the first annular heat conducting pipe is communicated with the second annular heat conducting pipe through the at least two connecting pipes, the at least two connecting pipes are arranged between the first annular heat conducting pipe and the second annular heat conducting pipe, the first annular heat conducting pipe surrounds the winding end part and can conduct heat with the winding end part, the second annular heat conducting pipe is fixedly connected with the shell and can conduct heat, and the first annular heat conducting pipe is used for conducting the heat generated by the winding end part to the second annular heat conducting pipe through the connecting pipes and conducting the heat to the shell through the second annular heat conducting pipe, to dissipate heat.

This application second aspect provides a heat conduction structure for motor heat dissipation, heat conduction structure includes: the first annular heat pipe, the second annular heat pipe and at least two connecting pipes. The external diameter of first annular heat pipe is less than the internal diameter of second annular heat pipe, first annular heat pipe sets up in the annular space of second annular heat pipe, just first annular heat pipe passes through two at least connecting pipes with second annular heat pipe intercommunication, two at least connecting pipes are in between first annular heat pipe and the second annular heat pipe, first annular heat pipe encircle in the winding tip of motor and with the winding tip can carry out heat-conduction, the second annular heat pipe with the casing fixed connection of motor just can carry out heat-conduction, first annular heat pipe be used for with the heat that the winding tip produced passes through the connecting pipe conduction extremely second annular heat pipe, and pass through second annular heat pipe conduction extremely the casing is in order to dispel the heat.

A third aspect of the present application provides an automobile including the aforementioned motor or the aforementioned heat conductive structure.

The application provides a motor, through set up encircle in winding head's first annular heat pipe, first annular heat pipe will the heat conduction that winding head produced extremely second annular heat pipe passes through second annular heat pipe conduction extremely the casing and dispel the heat, can increase the area of contact of heat pipe and winding head, and increase heat radiating area, thereby can promote winding head's radiating effect and the power density of motor.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and obviously, the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of a motor provided in an embodiment of the present application.

Fig. 2 is a side view of a motor provided in an embodiment of the present application.

Fig. 3 is a cross-sectional view of a heat conducting structure of a motor according to an embodiment of the present application.

Fig. 4 is a partial cross-sectional view of a positional relationship of a heat conducting structure, a winding, a stator, and a housing according to an embodiment of the present application.

Fig. 5 is a block diagram of an automobile according to an embodiment of the present application.

Reference numerals:

motor 100

Housing 10

Stator 20

Winding 30

Winding head 31

Heat conducting structure 40

First annular heat conduction pipe 41

Second annular heat conducting pipe 42

Connecting pipe 43

Fluid communication tube 431

Vapor communicating tube 432

Liquid inlet 11

Liquid outlet 12

First cooling liquid 44

Rotor 50

Rotating shaft 60

Magnetic shield 70

First magnetic shield 71

Second magnetic shield 72

Bearing 80

First bearing 81

Second bearing 82

End cap 90

First end cap 91

Second end cap 92

Automobile 200

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

In the description of the present application, the terms "first", "second", etc. are used for distinguishing different objects and not for describing a particular order, and further, the terms "upper", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present application.

Throughout the description of the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally attached; they may be connected directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

For purposes of clarity, the various features in the various drawings of the present application are not drawn to scale. Moreover, certain well-known elements may not be shown in the figures.

Referring to fig. 1 and fig. 2 together, fig. 1 is a cross-sectional view of a motor 100 according to an embodiment of the present disclosure, and fig. 2 is a side view of the motor 100 according to the embodiment of the present disclosure. As shown in fig. 1 and 2, the motor 100 includes: a housing 10, a stator 20, windings 30, and a thermally conductive structure 40. The stator 20 is cylindrical, the stator 20 is fixed to the inner side of the housing 10, an axial end 21 of the stator 20 has an opening, and a slot is formed in the inner wall of the stator. The winding 30 includes a winding middle portion embedded in the slot of the stator 20, and a winding end portion 31 extending from the winding middle portion to the outside of the stator 20 through the opening of the stator 20. The heat conducting structure 40 comprises a first annular heat conducting pipe 41, a second annular heat conducting pipe 42 and at least two connecting pipes 43, the outer diameter of the first annular heat conducting pipe 41 is smaller than the inner diameter of the second annular heat conducting pipe 42, the first annular heat conducting pipe 41 is disposed in the annular space of the second annular heat conducting pipe 42, the first annular heat conducting pipe 41 is communicated with the second annular heat conducting pipe 42 through the at least two connecting pipes 43, the at least two connecting pipes 43 are interposed between the first annular heat conducting pipe 41 and the second annular heat conducting pipe 42, the first annular heat conducting pipe 41 surrounds the winding end 31 and is heat-conductive with the winding end 31, the second annular heat conducting pipe 42 is fixedly connected with the housing 10 and is heat-conductive, the first annular heat conducting pipe 41 is used for conducting the heat generated by the winding end 31 to the second annular heat conducting pipe 42 through the connecting pipes 43, and is conducted to the housing 10 through the second annular heat conductive pipe 42 for heat dissipation.

The motor 100 provided in this embodiment is provided with the first annular heat pipe 41 surrounding the winding end 31, the first annular heat pipe 41 conducts the heat generated by the winding end 31 to the second annular heat pipe 42, and conducts the heat to the housing 10 through the second annular heat pipe 42 for heat dissipation, so as to increase the contact area between the heat pipes and the winding end 31, and increase the heat dissipation area, thereby improving the heat dissipation effect of the winding end 31 and the power density of the motor 100.

The first annular heat pipe 41, the second annular heat pipe 42 and the at least two connecting pipes 43 may be made of metal, such as copper, aluminum, stainless steel, silver, etc.

Wherein, as shown in fig. 1, in some embodiments, the stator 20 has openings at both opposite ends in the axial direction, the winding 30 includes two winding end portions 31, the two winding end portions 31 extend from the winding center to the outside of the stator 20 through openings at opposite ends of the stator 20, the motor 100 includes two sets of heat conducting structures 40, two first annular heat conducting pipes 41 of the two sets of heat conducting structures 40 respectively surround the two winding end portions 31 and respectively conduct heat with the two winding end portions 31, the two second annular heat conducting pipes 42 of the two sets of heat conducting structures 40 are respectively fixedly connected with the housing 10, and both can conduct heat with the casing 10, and the two sets of heat conducting structures 40 conduct heat generated by the two winding end portions 31 to the casing 10 and radiate the heat through the casing 10. The two sets of heat conducting structures 40 have the same structure, and the following describes a set of heat conducting structures 40 in detail.

Referring to fig. 3, fig. 3 is a cross-sectional view of a heat conducting structure 40 of a motor 100 according to an embodiment of the present disclosure. As shown in fig. 3, in some embodiments, the first annular heat conductive pipe 41 and the second annular heat conductive pipe 42 contain a first coolant 44, the at least two connection pipes 43 include a fluid connection pipe 431 and a vapor connection pipe 432 respectively located at two opposite sides of the first annular heat conductive pipe 41, the first coolant 44 in the first annular heat conductive pipe 41 is configured to absorb heat generated by the winding end 31 and vaporize into vapor, the vapor connection pipe 432 is configured to enable the vapor to enter the second annular heat conductive pipe 42 from the first annular heat conductive pipe 41, so that the vapor is condensed into liquid by heat exchange between the second annular heat conductive pipe 42 and the housing 10, the liquid flows back to the second annular heat conductive pipe 42, the fluid connection pipe 431 is configured to enable a part of the first coolant 44 of the second annular heat conductive pipe 42 to enter the first annular heat conductive pipe 41 from the second annular heat conductive pipe 42, so that the liquid level of the first cooling liquid 44 of the first annular heat conduction pipe 41 and the liquid level of the second annular heat conduction pipe 42 are kept flush, wherein the heat exchange between the casing 10 and the second annular heat conduction pipe 42 is performed to transfer the heat to the casing 10 and dissipate the heat through the casing 10.

The first cooling liquid 44 may be a substance having a low boiling point, for example, an organic halogenated alkane such as trichlorofluoromethane. In other embodiments, the first cooling fluid 44 may be water.

The first coolant 44 in the first annular heat pipe 41 absorbs the heat generated by the winding end 31 and evaporates into steam, the housing 10 cools the steam through the second annular heat pipe 42, so that the steam condenses into liquid and flows back to the second annular heat pipe 42 under the action of gravity, and a part of the first coolant 44 in the second annular heat pipe 42 enters the first annular heat pipe 41 through the fluid communication pipe 431, so that the first annular heat pipe 41 is flush with the liquid level of the first coolant 44 in the second annular heat pipe 42, and thus, the first coolant 44 is always contained in the first annular heat pipe 41, and can be used for continuously absorbing the heat generated by the winding end 31 and continuously conducting the heat to the second annular heat pipe 42 through the steam communication pipe 432.

Referring to fig. 4, fig. 4 is a partial cross-sectional view of the position relationship of the heat conducting structure 40, the winding 30, the stator 20 and the housing 10. As shown in fig. 4, in some embodiments, the first annular heat conducting pipe 41 is embedded in the winding end 31 and located inside the winding end 31, so that the outer surface of the first annular heat conducting pipe 41 is in contact with the winding end 31 and can conduct heat, the first annular heat conducting pipe 41 is fully and effectively utilized to dissipate heat, the contact area with the winding end 31 is increased, and the heat dissipation area is increased.

In other embodiments, the first annular heat conducting pipe 41 is sleeved on the winding end 31 and located on the outer surface of the winding end 31, so that the outer surface of the side of the first annular heat conducting pipe 41 away from the second annular heat conducting pipe 42 is in contact with the winding end 31 and can conduct heat, the contact area with the winding end 31 is increased, and the heat dissipation area is increased.

In some embodiments, the first annular heat conducting pipe 41 and the winding end 31 are filled with an insulating heat conducting material, so that there is no gap between the first annular heat conducting pipe 41 and the winding end 31 to facilitate the conduction of heat generated by the winding end 31 to the first annular heat conducting pipe 41, and the insulating heat conducting material can reduce the thermal resistance between the first annular heat conducting pipe 41 and the winding end 31 to facilitate the conduction of heat.

The insulating and heat conducting material can be insulating and heat conducting paint, such as epoxy resin, alkyd resin, silicone resin, and the like. The winding end 31 and the first annular heat pipe 41 surrounding the winding end 31 can be immersed in a liquid insulating and heat conducting paint, and then the insulating and heat conducting paint is solidified by air drying or baking, so that the first annular heat pipe 41 and the winding end 31 are relatively fixed and have no gap therebetween, and the heat generated by the winding end 31 can be continuously conducted to the first annular heat pipe 41, thereby facilitating the first annular heat pipe 41 to stably, efficiently and rapidly conduct the heat to the second annular heat pipe 42, and in addition, the winding end 31 and the first annular heat pipe 41 are wrapped by the insulating and heat conducting paint, thereby preventing the winding end 31 and the first annular heat pipe 41 from being mechanically damaged, Atmospheric or chemical corrosion.

Referring to fig. 2 again, as shown in fig. 2, in some embodiments, a cooling channel is disposed inside the housing 10, the cooling channel is used for flowing a second cooling liquid to cool the second annular heat conducting pipe 42, a liquid inlet 11 and a liquid outlet 12 are disposed outside the housing 10, the liquid inlet 11 and the liquid outlet 12 are respectively fixedly connected to two ends of the cooling channel, the second cooling liquid flows into the cooling channel from the liquid inlet 11 and flows out from the liquid outlet 12, so that the second cooling liquid guides heat conducted to the housing 10 out of the housing 10.

In some embodiments, the liquid inlet 11 and the liquid outlet 12 are respectively communicated with an auxiliary cooling device, the auxiliary cooling device includes a storage portion containing a second cooling liquid, and a refrigeration assembly, the refrigeration assembly is used for maintaining the temperature of the second cooling liquid in the storage portion to be a constant temperature, the constant temperature is lower than the working temperature of the winding end portion 31, wherein the second cooling liquid flows into the liquid inlet 11 from the storage portion and flows into the cooling channel through the liquid inlet 11, the second cooling liquid absorbs the heat conducted to the shell 10 and flows out from the liquid outlet 12 and then flows into the storage portion, the refrigeration assembly cools the second cooling liquid absorbing the heat and makes the temperature of the second cooling liquid to be a constant temperature, and by maintaining the temperature of the second cooling liquid in the storage portion to be a constant temperature and lower than the working temperature of the winding end portion 31, so that the temperature of the second cooling liquid flowing into the cooling channel from the liquid inlet 11 is always lower than the operating temperature of the winding overhang 31, so that the second cooling liquid circulating in the cooling channel can continuously absorb heat conducted to the housing 10 and conduct the heat to the storage. When the first annular heat conductive pipe 41 and the second annular heat conductive pipe 42 contain the first coolant 44, the constant temperature of the second coolant in the storage portion is lower than the boiling point of the first coolant 44 in the first annular heat conductive pipe 41 and the second annular heat conductive pipe 42, so that, when the first coolant 44 absorbs heat and is vaporized into vapor entering the second annular heat conductive pipe 42, the second coolant having a temperature lower than the boiling point of the first coolant 44 is heat-exchanged with the vapor, so that the vapor is condensed into liquid and flows back into the second annular heat conductive pipe 42.

Wherein the composition of the second cooling fluid is the same as or different from the composition of the first cooling fluid 44. In some embodiments, the composition of the second cooling fluid is water.

In some embodiments, the inner wall of the housing 10 is provided with a groove, the groove is disposed near the cooling channel, and the second annular heat conducting pipe 42 is embedded in the groove to be fixedly connected with the housing 10 and can conduct heat.

By placing the groove close to the cooling channel, the second annular heat conducting pipe 42 embedded in the groove is close to the cooling channel, thereby facilitating the second cooling liquid in the cooling channel to sufficiently and quickly absorb the heat conducted to the second annular heat conducting pipe 42 and conduct the heat out of the housing 10.

In some embodiments, the outer wall of the second annular heat conducting pipe 42 is stacked with a heat conducting layer, and when the second annular heat conducting pipe 42 is embedded in the groove of the inner wall of the casing 10, the heat conducting layer is located between the outer wall of the second annular heat conducting pipe 42 and the inner wall of the casing 10, so as to reduce the thermal resistance between the second annular heat conducting pipe 42 and the casing 10, and facilitate the conduction of the heat generated by the winding end 31 to the casing 10 through the second annular heat conducting pipe 42.

The material of the heat conduction layer can be heat conduction silicone grease, boron nitride, graphene, carbon fiber, ceramic and the like.

A heat conduction layer is laminated on the outer wall of the second annular heat conduction pipe 42, and a heat conduction silicone grease layer can be formed by coating heat conduction silicone grease on the outer wall of the second annular heat conduction pipe 42; alternatively, a boron nitride layer may be formed by attaching boron nitride to the outer wall of the second annular heat conductive pipe 42 by a dry spray, wet coating, or the like; alternatively, a graphene thermal conductive film may be adhered to an outer wall of the second annular thermal conductive pipe 42 to form a graphene thermal conductive layer.

Referring again to fig. 1 and 2, as shown in fig. 1 and 2, in some embodiments, the motor 100 further includes: rotor 50, rotating shaft 60, magnetic shield 70, bearing 80 and end cover 90. The rotor 50 is inserted into the stator 20 along an axial direction of the stator 20, and a gap exists between the rotor 50 and the stator 20, wherein the winding 30 is located between the stator 20 and the rotor 50. The rotating shaft 60 penetrates through the rotor 50 along the axial direction of the stator 20 and is circumferentially fixed with the rotor 50, and the rotating shaft 60 drives the rotor 50 to rotate through the rotation of the rotating shaft 60. The magnetic isolation plate 70 is sleeved on the rotating shaft 60 and circumferentially fixed with the rotating shaft 60, and the magnetic isolation plate 70 is fixedly connected with the rotor 50. The bearing 80 is sleeved on the rotating shaft 60 and fixed to the rotating shaft 60 in the circumferential direction. The end cover 90 is fixed to the inner side of the housing 10, and the bearing 80 and the end cover 90 are fixedly connected at least in the extending direction of the rotating shaft 60, so that the rotating shaft 60 is fixedly connected to the housing 10 at least in the extending direction of the rotating shaft 60.

As shown in fig. 1, in some embodiments, the end cap 90 includes a first end cap 91 and a second end cap 92, the bearing 80 includes a first bearing 81 and a second bearing 82, the rotating shaft 60 includes a first end and a second end opposite to each other along the extending direction of the rotating shaft 60, the first bearing 81 is sleeved on the first end of the rotating shaft 60 and circumferentially fixed to the first end, the second bearing 82 is sleeved on the second end of the rotating shaft 60 and circumferentially fixed to the second end, the first end cap 91 and the second end cap 92 are respectively fixed to the inner side of the housing 10, the first bearing 81 and the first end cap 91 are fixedly connected at least in the extending direction of the rotating shaft 60, so that the first end of the rotating shaft 60 is fixedly connected to the housing 10 at least in the extending direction of the rotating shaft 60, the second bearing 82 and the second end cap 92 are fixedly connected at least in the extending direction of the rotating shaft 60, so that the second end of the rotating shaft 60 is fixedly connected to the housing 10 at least in the extending direction of the rotating shaft 60.

As shown in fig. 1, in some embodiments, the magnetic isolation plate 70 includes a first magnetic isolation plate 71 and a second magnetic isolation plate 72, and the first magnetic isolation plate 71 and the second magnetic isolation plate 72 are respectively sleeved on the first end and the second end of the rotating shaft 60 and respectively fixed to two opposite ends of the rotor 50 along the extending direction of the rotor 50.

Referring to fig. 2 again, fig. 2 is a cross-sectional view of a heat conducting structure 40 for dissipating heat of a motor according to an embodiment of the present disclosure. The heat conductive structure 40 is applied to the motor 100. As shown in fig. 2, and also as previously described, the thermally conductive structure 40 includes: a first annular heat conductive pipe 41, a second annular heat conductive pipe 42, and at least two connection pipes 43. The outer diameter of the first annular heat pipe 41 is smaller than the inner diameter of the second annular heat pipe 42, the first annular heat pipe 41 is disposed in the annular space of the second annular heat pipe 42, and the first annular heat pipe 41 is communicated with the second annular heat pipe 42 through the at least two connecting pipes 43, the at least two connecting pipes 43 are disposed between the first annular heat pipe 41 and the second annular heat pipe 42, the first annular heat pipe 41 surrounds the winding end 31 of the motor 100 and can conduct heat with the winding end 31, the second annular heat pipe 42 is fixedly connected with the housing 10 of the motor 100 and can conduct heat, the first annular heat pipe 41 is used for conducting the heat generated by the winding end 31 to the second annular heat pipe 42 through the connecting pipes 43 and conducting the heat to the housing 10 through the second annular heat pipe 42, to dissipate heat.

In the heat conducting structure 40 provided in this embodiment, the first annular heat conducting pipe 41 is disposed around the winding end 31 of the motor 100, so as to increase the contact area between the heat conducting pipe and the winding end 31 and increase the heat dissipation area, thereby improving the heat dissipation effect.

Wherein, in some embodiments, the first annular heat conductive pipe 41 and the second annular heat conductive pipe 42 contain the first cooling liquid 44, the at least two connection pipes 43 include a fluid connection pipe 431 and a vapor connection pipe 432 respectively located at two opposite sides of the first annular heat conductive pipe 41, the first cooling liquid 44 in the first annular heat conductive pipe 41 is used for absorbing heat generated by the winding end 31 and volatilizing to form vapor, the vapor connection pipe 432 is used for enabling the vapor to enter the second annular heat conductive pipe 42 from the first annular heat conductive pipe 41, so that the vapor is condensed into liquid through heat exchange between the second annular heat conductive pipe 42 and the housing 10, the liquid is returned to the second annular heat conductive pipe 42, the fluid connection pipe 431 is used for enabling part of the first cooling liquid 44 of the second annular heat conductive pipe 42 to enter the first annular heat conductive pipe 41 from the second annular heat conductive pipe 42, so that the liquid level of the first cooling liquid 44 of the first annular heat conduction pipe 41 and the liquid level of the second annular heat conduction pipe 42 are kept flush, wherein the heat exchange between the casing 10 and the second annular heat conduction pipe 42 is performed to transfer the heat to the casing 10 and dissipate the heat through the casing 10.

The first cooling liquid 44 in the first annular heat conduction pipe 41 absorbs the heat generated by the winding end 31 and is vaporized into steam, the shell 10 cools the steam through the second annular heat conduction pipe 42, so that the steam is condensed into liquid and flows back to the second annular heat conduction pipe 42 under the action of gravity, while part of the first cooling liquid 44 in the second annular heat conduction pipe 432 enters the first annular heat conduction pipe 41 through the fluid communication pipe 431, so that the liquid level of the first cooling liquid 44 of the first annular heat conduction pipe 41 and the liquid level of the second cooling liquid 44 of the second annular heat conduction pipe 42 are kept flush, therefore, the first cooling liquid 44 is always contained in the first annular heat conduction pipe 41, which can be used for continuously absorbing the heat generated by the winding end 31 and conducting the heat to the second annular heat conduction pipe 42 through the steam communication pipe 432, wherein the processes of heat absorption and cooling can be circulated, therefore, heat can be continuously dissipated from the winding end 31 of the motor 100 when the motor 100 is in operation, and the power density and the operating efficiency of the motor 100 are improved.

Referring to fig. 5, fig. 5 is a block diagram of an automobile 200 according to an embodiment of the present disclosure. As shown in fig. 5, the automobile 200 includes the electric machine 100 provided in any one of the foregoing embodiments or the heat conducting structure 40 for an electric machine in any one of the foregoing embodiments.

The motor 100 of the car 200 that this application embodiment provided is provided with surround in the first annular heat pipe 41 of the winding end 31 of motor 100, first annular heat pipe 41 will the heat conduction that winding end 31 produced extremely the second annular heat pipe 42 and through the second annular heat pipe 42 conduct extremely the casing 10, thereby do the heat dissipation of winding end 31, wherein, through with first annular heat pipe 41 surround in winding end 31, can increase heat radiating area, thereby promote the radiating effect.

The foregoing is an implementation of the embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiments of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims (10)

1. An electric machine, characterized in that the electric machine comprises:

a housing;

the stator is cylindrical and is fixed on the inner side of the shell, an opening is formed in the end part of the stator along the axial direction, and a clamping groove is formed in the inner wall of the stator;

the winding comprises a winding middle part and a winding end part, the winding middle part is embedded in a clamping groove of the stator, and the winding end part extends from the winding middle part to the outer side of the stator through an opening of the stator; and

a heat conduction structure, including a first annular heat conduction pipe, a second annular heat conduction pipe and at least two connection pipes, wherein the outer diameter of the first annular heat conduction pipe is smaller than the inner diameter of the second annular heat conduction pipe, the first annular heat conduction pipe is disposed in the annular space of the second annular heat conduction pipe, and the first annular heat conduction pipe is communicated with the second annular heat conduction pipe through the at least two connection pipes, the at least two connection pipes are interposed between the first annular heat conduction pipe and the second annular heat conduction pipe, the first annular heat conduction pipe surrounds the winding end and can conduct heat with the winding end, the second annular heat conduction pipe is fixedly connected with the housing and can conduct heat, the first annular heat conduction pipe is used for conducting the heat generated by the winding end to the second annular heat conduction pipe through the connection pipes and conducting the heat to the housing through the second annular heat conduction pipe, to dissipate heat.

2. The electric machine according to claim 1, wherein the first and second annular heat conductive pipes contain a first coolant therein, the at least two connection pipes include a fluid connection pipe and a vapor connection pipe respectively located on opposite sides of the first annular heat conductive pipe, the first coolant in the first annular heat conductive pipe is configured to absorb heat generated at the winding end and vaporize into vapor, the vapor connection pipe is configured to allow the vapor to enter the second annular heat conductive pipe from the first annular heat conductive pipe and to be condensed into liquid by heat exchange with the housing through the second annular heat conductive pipe, the liquid flows back to the second annular heat conductive pipe, and the fluid connection pipe is configured to allow a part of the first coolant of the second annular heat conductive pipe to enter the first annular heat conductive pipe from the second annular heat conductive pipe, and the liquid level of the first cooling liquid of the first annular heat conduction pipe and the liquid level of the first cooling liquid of the second annular heat conduction pipe are kept flush, wherein the shell and the second annular heat conduction pipe exchange heat to conduct heat to the shell and dissipate the heat through the shell.

3. The electric machine according to claim 1, wherein the first annular heat conductive pipe is buried in the winding end portion inside the winding end portion.

4. The electric machine of claim 1 wherein the first annular heat conducting tube is sleeved over the winding overhang on an outer surface of the winding overhang.

5. The electric machine of claim 3 or 4, wherein the first annular heat conducting pipe and the winding end are filled with insulating heat conducting material, so that no gap is formed between the first annular heat conducting pipe and the winding end to facilitate heat generated by the winding end to be conducted to the first annular heat conducting pipe.

6. The electric machine according to claim 1, wherein a cooling channel is disposed inside the housing, the cooling channel is used for circulating a second cooling liquid to cool the second annular heat conducting pipe, a liquid inlet and a liquid outlet are disposed outside the housing, the liquid inlet and the liquid outlet are respectively fixedly connected to two ends of the cooling channel, the second cooling liquid flows into the cooling channel from the liquid inlet and flows out from the liquid outlet, so that the second cooling liquid guides heat conducted to the housing out of the housing.

7. The electric machine of claim 6 wherein said housing has a recess in an inner wall thereof, said recess being disposed adjacent to said cooling channel, said second annular heat conducting tube being embedded in said recess and being fixedly connected to said housing and thermally conductive.

8. The electric machine according to claim 7, wherein the outer wall of the second annular heat conducting pipe is stacked to form a heat conducting layer, and when the second annular heat conducting pipe is embedded in the groove of the inner wall of the housing, the heat conducting layer is located between the outer wall of the second annular heat conducting pipe and the inner wall of the housing, so as to reduce the thermal resistance between the second annular heat conducting pipe and the housing, and facilitate the conduction of heat generated by the winding end to the housing through the second annular heat conducting pipe.

9. A heat conduction structure for heat dissipation of a motor, the heat conduction structure comprising:

the first annular heat pipe, the second annular heat pipe and at least two connecting pipes;

the external diameter of first annular heat pipe is less than the internal diameter of second annular heat pipe, first annular heat pipe sets up in the annular space of second annular heat pipe, just first annular heat pipe passes through two at least connecting pipes with second annular heat pipe intercommunication, two at least connecting pipes are in between first annular heat pipe and the second annular heat pipe, first annular heat pipe encircle in the winding tip of motor and with the winding tip can carry out heat-conduction, the second annular heat pipe with the casing fixed connection of motor just can carry out heat-conduction, first annular heat pipe be used for with the heat that the winding tip produced passes through the connecting pipe conduction extremely second annular heat pipe, and pass through second annular heat pipe conduction extremely the casing is in order to dispel the heat.

10. An automobile, characterized in that the automobile comprises an electric machine according to any one of claims 1 to 8 or a heat conducting structure for heat dissipation of an electric machine according to claim 9.

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