CN219918635U

CN219918635U - Heat radiation structure and motor

Info

Publication number: CN219918635U
Application number: CN202321228652.1U
Authority: CN
Inventors: 郝大全; 刘潇; 王亮; 张兆宇; 张韶妍
Original assignee: Dalian Zhi Ding Technology Co ltd
Current assignee: Dalian Zhi Ding Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-10-27
Anticipated expiration: 2033-05-18

Abstract

The utility model discloses a heat dissipation structure and a motor, wherein the heat dissipation structure comprises: a windshield disposed between the end cap and the rotor; and the air cavity is communicated with the air guide hole, so that the air entering the air cavity from the external environment flows into the through hole through the air guide hole and is limited to flow into the motor air gap. The utility model provides a heat radiation structure and a motor, which solve the technical problem that impurities easily enter the motor when the existing motor is in air cooling so as to influence the safe operation of the motor.

Description

Heat radiation structure and motor

Technical Field

The utility model relates to the technical field of motor heat dissipation, in particular to a heat dissipation structure and a motor.

Background

The permanent magnet motor has the advantages of high efficiency, high power density and the like, and is widely applied to the fields of industry, aerospace, traffic traction, household use and the like. In the process of working, the permanent magnet motor generally generates certain heat due to factors such as power loss and the like. The existing cooling technology of the high-power low-rotation-speed permanent magnet motor mainly cools the stator and the rotor of the motor in a shell water cooling mode, but with the increase of power, the loss value of the motor is also continuously increased, the effect of the shell water cooling on the stator winding end part and the rotor of the motor is limited, the temperature rise of the end winding and the rotor is higher, and the irreversible demagnetization of the permanent magnet on the rotor is also caused when the temperature rise is serious. Aiming at the problem that the temperature rise of a rotor of a high-power low-rotation-speed permanent magnet motor is difficult to cool, ventilation cooling of the rotor is matched on the basis of water cooling of a stator shell. But is limited by the existing air cooling structure, dust and other impurities easily enter the motor, and further the safety operation of the motor is adversely affected.

Disclosure of Invention

The utility model mainly aims to provide a heat radiation structure and a motor, and aims to solve the technical problems that impurities easily enter the motor during air cooling of the existing motor to influence the safe operation of the motor and the cooling effect is poor.

To achieve the above object, an embodiment of the present utility model provides a heat dissipation structure applied to cooling of a motor, the motor including a housing, a rotor disposed in the housing, a stator sleeved outside the rotor, and an end cover disposed at an end of the housing, the rotor being provided with a through hole extending along an axial direction thereof, the heat dissipation structure including:

a windshield disposed between the end cap and the rotor; a kind of electronic device with high-pressure air-conditioning system

The air cavity is communicated with the air guide hole, so that air entering the air cavity from the external environment flows into the through hole through the air guide hole and is limited to flow into the motor air gap.

Optionally, in an embodiment of the present utility model, two ends of the rotor are provided with one wind shield and one flow guide plate to form two air cavities, one of the two air cavities is an air inlet cavity, and the other of the two air cavities is an air outlet cavity; an air inlet hole is formed in the end cover corresponding to the air inlet cavity, and an air outlet hole is formed in the end cover corresponding to the air outlet cavity; the gas flows through the air inlet hole, the through hole and the air outlet hole in sequence.

Optionally, in an embodiment of the present utility model, the aperture of the air guide hole is smaller than or equal to the aperture of the through hole; and/or the shape of the air guide hole is matched with the shape of the through hole; and/or the number of the air guide holes is smaller than or equal to the number of the through holes.

Optionally, in an embodiment of the present utility model, the baffle is detachably connected to the rotor.

Optionally, in an embodiment of the present utility model, the motor further includes a stator sleeved outside the rotor, and the heat dissipation structure further includes a gas stirring member, where the gas stirring member is connected to the flow guiding plate and rotates synchronously with the flow guiding plate to stir air.

Optionally, in an embodiment of the present utility model, the air stirring member is a spoiler, one end of the spoiler is connected to the deflector, and the other end of the spoiler extends toward the stator to stir air at an end of the stator; or, the gas stirring piece is a stirring piece, one end of the stirring piece is connected with the guide plate, and the other end of the stirring piece extends into the air cavity.

Optionally, in an embodiment of the present utility model, the baffle includes:

the first deflector is arranged at the end part of the rotor;

the first deflector plate and the second deflector plate are arranged at intervals in the direction from the end cover to the rotor, and the second deflector plate extends to the end part of the stator; and

and the connecting sub-board is connected with the first deflector and the second deflector, and the wind shield, the first deflector and the connecting sub-board enclose the air cavity.

Optionally, in an embodiment of the present utility model, the wind shield includes a first sub-cover and a second sub-cover sleeved outside the first sub-cover, and the first sub-cover and the second sub-cover are spaced to form the air cavity in cooperation with the air guide plate.

Optionally, in an embodiment of the present utility model, the first sub-cover includes a first mounting sub-board, and a first ring board and a second ring board disposed on opposite sides of the first mounting sub-board, the first ring board and the second ring board extending in a direction away from each other; the first annular plate is arranged on one side of the rotor, which is away from the stator, and the second annular plate is connected with the end cover.

Optionally, in an embodiment of the present utility model, the second sub-cover includes a second mounting sub-board, and a third ring board and a fourth ring board disposed on opposite sides of the second mounting sub-board, the third ring board and the fourth ring board extending in a direction away from each other, the third ring board being disposed near the stator, the fourth ring board being disposed near the deflector; the second installation sub-board extends towards the direction far away from the fourth annular board and is arranged with the stator at intervals to form an avoidance cavity.

To achieve the above object, an embodiment of the present utility model provides a motor including the above-described heat dissipation structure.

Compared with the prior art, in the technical scheme provided by the utility model, the guide plate is arranged on the rotor, and the air guide hole communicated with the through hole of the rotor is arranged on the guide plate, so that the air flow can be guided into the through hole of the rotor. Because the through holes extend along the axial direction of the rotor, the heat generated by the rotor can be taken away by the air flow in the flowing process of the through holes, so that the heat dissipation of the rotor is realized. And a wind shield is arranged between the guide plate and the end cover, the wind shield, the end cover and the guide plate are matched to form an air cavity communicated with the external environment, and because the air cavity is isolated from the motor air gap, gas directly flows into the through hole of the rotor through the air guide hole after entering the air cavity, and the gas is prevented from flowing towards the motor air gap. That is, the air cavity defines the flow path of the air flow, so that the air flow is prevented from flowing to the air gap of the motor after entering the interior of the motor and directly contacting the permanent magnet and the end part of the stator winding, and the air flow entering the air gap of the motor is further prevented from affecting the safe operation of the motor.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a heat dissipating structure according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a baffle in an embodiment of a heat dissipating structure according to the present utility model;

FIG. 3 is a schematic view of a first sub-enclosure in an embodiment of a heat dissipating structure according to the present utility model;

fig. 4 is a schematic structural diagram of a second sub-cover in an embodiment of the heat dissipation structure of the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				110	Wind shield	111	First sub-cover
1111	First mounting sub-board	1112	First annular plate
				1113	Second annular plate	112	Second sub-cover
1121	Second mounting sub-board	1122	Third annular plate
				1123	Fourth annular plate	120	Deflector plate
122	Second deflector plate	121	First deflector plate
				124	Air vent	123	Connector board
231	Through hole	130	Gas stirring piece
				210	Casing of machine	220	End cap
230	Rotor

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present utility model without making any inventive effort, are intended to be within the scope of the embodiments of the present utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like in the embodiments of the present utility model are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.

In embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be either fixedly attached, detachably attached, 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 embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the embodiments of the present utility model.

At present, the cooling mode of the high-power low-rotation-speed permanent magnet motor is mainly to cool the stator and the rotor of the motor in a shell water cooling mode, but with the increase of power, the loss value of the motor is also continuously increased, the effect of the shell water cooling on cooling the stator winding end part and the rotor of the motor is limited, the temperature rise of the end winding and the rotor is easy to be caused to be higher, and the irreversible demagnetization of the permanent magnet on the rotor is also caused when the temperature rise is serious.

For this purpose, the engineering is usually based on the water cooling of the stator casing, in combination with the ventilation cooling of the rotor.

The ventilation cooling comprises an open ventilation structure and a closed circulation type ventilation structure, wherein the open ventilation structure is that cooling air enters the motor from the outside of the motor under the driving of an external fan, hot air is discharged to the outside of the motor after the motor is cooled, the cooling effect of the cooling mode is good, the structure is simple, impurities such as dust in the outside air easily enter the motor, difficulties are brought to cleaning and maintenance, and the safe operation of the motor can be influenced.

In the closed circulation type ventilation structure, cooling air is usually driven by a fan arranged on a rotating shaft, the cooling air is in closed circulation in the motor, heat of the motor is discharged through a secondary cooling medium, impurities such as dust can be prevented from entering the motor by the cooling mode, but the cooling effect is limited, the volume is large, secondary cooling is needed, and the cost is high.

Therefore, in the embodiment of the utility model, by providing the heat dissipation structure, the wind shield is arranged between the guide plate and the end cover, the wind shield, the end cover and the guide plate are matched to form the air cavity which is communicated with the external environment and isolated from the air gap of the motor, and the air flows into the through hole of the rotor through the air guide hole directly after entering the air cavity, that is, the air cavity defines the flow path of the air flow, and the air flow is prevented from directly contacting the permanent magnet and the stator winding end part after entering the inside of the motor, so that the air flow is prevented from entering the air gap of the motor to influence the safe operation of the motor.

In order to better understand the above technical solutions, the following describes the above technical solutions in detail with reference to the accompanying drawings.

As shown in fig. 1, an embodiment of the present utility model provides a heat dissipation structure for cooling a motor, the motor including a housing 210, a rotor 230 disposed in the housing 210, a stator sleeved outside the rotor 230, and an end cover 220 disposed at an end of the housing 210, the rotor 230 being provided with a through hole 231 extending along an axial direction thereof, the heat dissipation structure comprising:

a wind shield 110 provided between the end cover 220 and the rotor 230; a kind of electronic device with high-pressure air-conditioning system

The air guide plate 120 is arranged at the end part of the rotor 230, the wind shield 110, the air guide plate 120 and the end cover 220 are matched to jointly enclose an air cavity which is communicated with the external environment and isolated from the motor air gap, the air guide plate 120 is provided with an air guide hole 124 which is communicated with the through hole 231, and the air cavity is communicated with the air guide hole 124, so that air entering the air cavity from the external environment flows into the through hole 231 through the air guide hole 124 and is limited to flow into the motor air gap.

In the technical solution adopted in this embodiment, the baffle 120 is disposed on the rotor 230, and the air guide hole 124 that communicates with the through hole 231 of the rotor 230 is disposed on the baffle 120, so that the air flow can be guided into the through hole 231 of the rotor 230. Since the through holes 231 extend along the axial direction of the rotor 230, the air flow takes away heat generated by the rotor 230 during the flowing process of the through holes 231, thereby realizing heat dissipation of the rotor 230. In addition, the wind shield 110 is disposed between the air guide plate 120 and the end cover 220, and the wind shield 110, the end cover 220 and the air guide plate 120 cooperate to form an air cavity communicating with the external environment, and since the air cavity is isolated from the motor air gap, the air can flow into the through hole 231 of the rotor 230 directly through the air guide hole 124 after entering the air cavity, but not flow into the motor air gap. That is, the air cavity defines the flow path of the air flow, so that the air flow is prevented from flowing to the motor air gap and directly contacting the permanent magnet and the stator winding end part, and the air flow entering the motor air gap is prevented from affecting the safe operation of the motor.

Illustratively, in one embodiment of the present utility model, two wind shields 110 and a baffle 120 are disposed at two ends of the rotor 230 to form two air chambers, one of the two air chambers is an air inlet chamber, and the other of the two air chambers is an air outlet chamber; an air inlet hole is formed in the end cover 220 corresponding to the air inlet cavity, and an air outlet hole is formed in the end cover 220 corresponding to the air outlet cavity; the gas flows through the gas inlet holes, the through holes 231, and the gas outlet holes in this order.

Specifically, the front and rear ends of the casing 210 are provided with one end cap 220, and for convenience of description, the end cap 220 at the front end of the casing 210 is referred to as a front cover, and the end cap 220 at the rear end of the casing 210 is referred to as a rear cover. One end of the rotor 230 facing the front cover is provided with a wind shield 110 and a guide plate 120 and forms an air inlet cavity, one end of the rotor 230 facing the rear cover is also provided with a wind shield 110 and a guide plate 120 and forms an air outlet cavity, the front cover is provided with an air inlet hole communicated with the air inlet cavity, and the rear cover is provided with an air outlet hole communicated with the air outlet cavity. The air enters the air inlet cavity through the air inlet hole, then flows into the through hole 231 through the air guide hole 124, and the air flow flowing into the through hole 231 absorbs heat generated by the rotor 230 and then enters the air outlet cavity, and finally is discharged to the outside of the motor through the air outlet hole, so that a complete air flow channel is formed. Alternatively, the windshield 110 is secured to the end cover 220 by screws or bolts or welding, without limitation.

In an embodiment, to accelerate the airflow, a fan may be further disposed at the air outlet, and the airflow may smoothly flow between the air inlet and the air outlet under the driving of the fan. In another embodiment, a plurality of air inlets are provided, and the plurality of air inlets are arranged in a circumferential array on the front cover, so that air can be facilitated to enter the air inlet cavity quickly, and enough air in the air inlet cavity flows into the through holes 231 of the rotor 230 to absorb heat, so that the heat dissipation effect is improved. As an alternative mode, the air outlet hole is provided with one, the aperture of the air outlet hole is larger than that of the air inlet hole, and the production process is simplified on the basis of ensuring smooth outflow of air flow.

Illustratively, in one embodiment of the present utility model, the aperture of the air guide hole 124 is smaller than or equal to the aperture of the through hole 231, so that sufficient air flow into the through hole 231 can be ensured to absorb heat. In an embodiment, a plurality of through holes 231 are provided, and a plurality of through holes 231 are disposed at intervals along the radial direction of the rotor 230, and each through hole 231 may be provided with one air vent 124, that is, the number of through holes 231 is the same as the number of air vents 124. Of course, in other embodiments, the number of through holes 231 may be greater than the number of air holes 124, which is not limited herein. Preferably, the cross-sectional shape of the through hole 231 is the same as the cross-sectional shape of the air guide hole 124.

In an embodiment of the present utility model, the baffle 120 is detachably connected to the rotor 230, so that the baffle 120 can be conveniently detached from the rotor 230, for example, the baffle 120 can be detachably connected to the rotor 230 by a clamping connection, a bolt or a screw, which is not limited herein.

Illustratively, referring to fig. 2, in an embodiment of the present utility model, the heat dissipating structure further includes a gas stirring member 130, and the gas stirring member 130 is connected to the baffle 120 and rotates in synchronization with the baffle 120 to stir air. Through the gas stirring piece 130 that sets up, can accelerate the flow rate of air to utilize the forced air cooling mode to dispel the heat for the motor, improve the radiating efficiency of motor.

Illustratively, the gas stirring member 130 is a spoiler, one end of which is connected to the baffle 120, and the other end of which extends toward the stator to stir air at the end of the stator. The baffle 120 is provided on the rotor 230 and can rotate in synchronization with the rotor 230. In order to accelerate the air flow of the stator end accessories, a spoiler is arranged on the guide plate 120, and the spoiler and the rotor 230 synchronously rotate, so that the air near the stator winding end can be stirred, the heat exchange capability between the stator winding end and the water cooling structure of the shell 210 is enhanced, the temperature of the stator winding end is further reduced, and the overall heat dissipation effect of the motor is further improved.

Illustratively, the gas stirring member 130 is a stirring blade, one end of which is connected to the baffle 120, and the other end of which extends into the air chamber. It can be understood that the stirring sheets and the guide plate 120 are in the same plane, and the air in the air cavity can be stirred by the stirring sheets arranged on the end face of the guide plate 120, so that the flow rate of the air is accelerated, the heat emitted by the rotor is timely taken away, and the heat dissipation effect of the rotor is improved.

Illustratively, referring to FIG. 2, in one embodiment of the utility model, the baffle 120 comprises:

a first deflector 121 provided at an end of the rotor 230;

the second deflector plate 122, the first deflector plate 121 and the second deflector plate 122 are arranged at intervals in the direction from the end cover 220 to the rotor 230, the spoiler is arranged on the second deflector plate 122 and faces the stator, and the second deflector plate 122 extends to the end part of the stator; and

the connection sub-plate 123 connects the first deflector 121 and the second deflector 122, and the air chamber is defined by the windshield 110, the first deflector 121, and the connection sub-plate 123.

Specifically, the deflector 120 includes a first deflector 121, a second deflector 122, and a connector 123. The first deflector 121 and the second deflector 122 are both in annular structures, the first deflector 121 and the second deflector 122 are parallel and arranged at intervals, the connecting deflector 123 connects the first deflector 121 and the second deflector 122, the air guide holes 124 are formed in the first deflector 121, and the spoiler is arranged in the second deflector 122. It will be appreciated that one end of the connection sub-plate 123 is connected to the outer edge of the first deflector plate 121, and the other end of the connection sub-plate 123 is connected to the inner edge of the second deflector plate 122. When assembled, the first deflector 121 is directly connected to the rotor 230, i.e. attached to the side of the rotor 230 facing the end cap 220, and the connection sub-plate 123 is arranged such that the second deflector 122 is offset from the first deflector 121, thereby forming a gap between the second deflector 122 and the end of the stator winding, and the spoiler extends into the gap, thereby facilitating the arrangement of the spoiler and preventing the air flow to the end of the stator winding.

Illustratively, referring to FIG. 1, in one embodiment of the present utility model, the windshield 110 includes a first sub-cover 111 and a second sub-cover 112 that is sleeved outside the first sub-cover 111, the first sub-cover 111 and the second sub-cover 112 being spaced apart to cooperate with the baffle 120 to form an air cavity. Specifically, the first sub-cover 111 and the second sub-cover 112 are both in annular structures, the first sub-cover 111 is connected with the end cover 220 and the first deflector 121, the second sub-cover 112 is connected with the end cover 220 and the second deflector 122, and the second sub-cover 112 is sleeved outside the first sub-cover 111, so that an air cavity can be conveniently formed. The end of the first sub-cover 111 away from the end cover 220 is close to the first deflector 121 but not in contact, and the end of the second sub-cover 112 away from the end cover 220 is close to the second deflector 122 but not in contact, so that the gaps between the first sub-cover 111 and the first deflector 121, and between the second sub-cover 112 and the second deflector 122, are small enough to prevent the air flow from passing therethrough, and the friction of the first deflector 121 during rotation is reduced.

Illustratively, referring to fig. 3, in one embodiment of the present utility model, the first sub-cover 111 includes a first mounting sub-plate 1111 and first and second ring plates 1112 and 1113 disposed on opposite sides of the first mounting sub-plate 1111, the first and second ring plates 1112 and 1113 extending in a direction away from each other; wherein the first ring plate 1112 is disposed on a side of the rotor 230 facing away from the stator and the second ring plate 1113 is coupled to the end cap 220. Specifically, the first sub-cover 111 includes a first mounting sub-plate 1111, a first ring plate 1112 and a second ring plate 1113, where the first ring plate 1112 and the second ring plate 1113 are disposed on opposite sides of the first mounting sub-plate 1111, and the first ring plate 1112 and the second ring plate 1113 are parallel and spaced apart, and the first ring plate 1112 is connected to an inner edge of the first mounting sub-plate 1111 and the second ring plate 1113 is connected to an outer edge of the first mounting sub-plate 1111. When assembled, the first ring plate 1112 extends to a side of the rotor 230 facing away from the stator, and an end of the second ring plate 1113 facing away from the first mounting sub-plate 1111 abuts against the inner side of the end cap 220, and the first mounting sub-plate 1111 is adjacent to the first deflector sub-plate 121 but not in contact therewith, so that air flow to the permanent magnet or motor air gap can be prevented.

Illustratively, referring to fig. 4, in an embodiment of the present utility model, the second sub-cover 112 includes a second mounting sub-plate 1121 and third and fourth ring plates 1122 and 1123 disposed at opposite sides of the second mounting sub-plate 1121, the third and fourth ring plates 1122 and 1123 extending in a direction away from each other, the third ring plate 1122 being disposed adjacent to the stator, and the fourth ring plate 1123 being disposed adjacent to the baffle 120; wherein, fourth annular plate 1123 cover is established in the outside of second annular plate 1113, and second installation subplate 1121 extends and sets up with the stator interval in order to form the chamber of dodging towards the direction of keeping away from fourth annular plate 1123, and the spoiler extends to dodging the intracavity. Specifically, the second sub-cover 112 includes a second mounting sub-plate 1121, a third ring plate 1122, and a fourth ring plate 1123, the third ring plate 1122 and the fourth ring plate 1123 are disposed on opposite sides of the second mounting sub-plate 1121, the third ring plate 1122 and the fourth ring plate 1123 are disposed in parallel and spaced apart, the third ring plate 1122 is connected to an outer edge of the second mounting sub-plate 1121, and the fourth ring plate 1123 is connected to an inner edge of the second mounting sub-plate 1121. During assembly, one side of the fourth annular plate 1123 away from the second mounting sub-plate 1121 is connected to the end cover 220, one end of the third annular plate 1122 away from the second mounting sub-plate 1121 is disposed close to the end of the stator winding, and the second mounting sub-plate 1121 is close to the guide plate 120 but is not in contact with the guide plate, so that windage is generated in the avoidance cavity formed by the second mounting sub-plate 1121, the third annular plate 1122 and the end of the stator winding, and gas is prevented from flowing from the gap between the second mounting sub-plate 1121 and the guide plate 120 to the end of the stator winding.

To achieve the above object, an embodiment of the present utility model provides a motor including the above-described heat dissipation structure. Specifically, the specific structure of the heat dissipation structure refers to the above embodiment, and since the motor adopts all the technical solutions of the above embodiment, at least the motor has all the beneficial effects brought by the technical solutions of the above embodiment, and will not be described in detail herein.

The foregoing description is only the preferred embodiments of the present utility model, and is not intended to limit the scope of the embodiments of the present utility model, and all the equivalent structural changes made by the descriptions of the embodiments of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the embodiments of the present utility model.

Claims

1. The utility model provides a heat radiation structure is applied to the cooling of motor, the motor includes the casing, sets up rotor, the cover of rotor outside is established and set up the end cover at the casing tip in the casing, the rotor is equipped with the through-hole that extends along its axial, its characterized in that, heat radiation structure includes:

2. The heat dissipating structure of claim 1, wherein one of said windshields and one of said deflectors are provided at both ends of said rotor to form two of said air chambers, one of said air chambers being an air inlet chamber and the other of said air chambers being an air outlet chamber; an air inlet hole is formed in the end cover corresponding to the air inlet cavity, and an air outlet hole is formed in the end cover corresponding to the air outlet cavity; the gas flows through the air inlet hole, the through hole and the air outlet hole in sequence.

3. The heat dissipating structure of claim 2, wherein the aperture of said air vent is less than or equal to the aperture of said through hole;

and/or the shape of the air guide hole is matched with the shape of the through hole;

and/or the number of the air guide holes is smaller than or equal to the number of the through holes.

4. The heat dissipating structure of claim 1, wherein said baffle is removably coupled to said rotor.

5. The heat dissipating structure of claim 1, further comprising a gas agitating member coupled to the baffle and rotating in synchronization with the baffle to agitate the air.

6. The heat dissipating structure of claim 5, wherein said gas agitating member is a spoiler, one end of said spoiler being connected to said deflector, the other end of said spoiler extending toward said stator to agitate air at an end of said stator; or, the gas stirring piece is a stirring piece, one end of the stirring piece is connected with the guide plate, and the other end of the stirring piece extends into the air cavity.

7. The heat dissipating structure of claim 1, wherein said baffle comprises:

the first deflector is arranged at the end part of the rotor;

8. The heat dissipating structure of claim 1, wherein said wind shield includes a first sub-shield and a second sub-shield that is sleeved outside said first sub-shield, said first sub-shield and said second sub-shield being spaced apart to cooperate with said baffle to form said air cavity.

9. The heat dissipating structure of claim 8, wherein said first sub-enclosure includes a first mounting sub-panel and first and second ring panels disposed on opposite sides of said first mounting sub-panel, said first and second ring panels extending in directions away from each other; the first annular plate is arranged on one side of the rotor, which is away from the stator, and the second annular plate is connected with the end cover.

10. The heat dissipating structure of claim 9, wherein said second sub-enclosure includes a second mounting sub-panel and third and fourth ring panels disposed on opposite sides of said second mounting sub-panel, said third and fourth ring panels extending in a direction away from each other, said third ring panel disposed adjacent to said stator and said fourth ring panel disposed adjacent to said baffle; the second installation sub-board extends towards the direction far away from the fourth annular board and is arranged with the stator at intervals to form an avoidance cavity.

11. An electric machine comprising a heat dissipating structure as defined in any one of claims 1-10.