Wind resistance slot wedge structure, stator and motor

Abstract

The application relates to a wind resistance reduction slot wedge structure, a stator and a motor. The wind resistance reduction slot wedge structure comprises a fixed part and a plurality of wind blocking parts connected with the fixed part; the plurality of wind blocking parts are arranged around the central axis of the fixed part. The wind blocking parts can be inserted into the slot opening of the stator core, and can block the flow direction of the high-speed airflow in the stator core to the stator slot of the stator core during high-speed rotation of the rotor, which can reduce the friction between the high-speed airflow and the stator core, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor and improve the efficiency of the motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a wind resistance reduction slot wedge structure, a stator and an electric machine. BACKGROUND

[0002] At present, in order to facilitate the production and processing of permanent magnet motor stators, a plurality of stator slots are usually formed on the stator core in the circumferential direction, which is not conducive to the oil return of the compressor, increases the loss of the motor and reduces the efficiency of the motor. SUMMARY

[0003] Therefore, the present application provides a wind resistance reduction slot wedge structure, a stator and an electric machine to solve the above technical problems.

[0004] A wind resistance reduction slot wedge structure comprises a fixed part and a plurality of wind blocking parts connected to the fixed part.

[0005] The plurality of wind blocking parts are arranged around the central axis of the fixed part.

[0006] In one embodiment, a first flow guide part is arranged on the side wall of the wind blocking part close to the central axis of the fixed part, and the flow direction of the first flow guide part is the same as the gas flow direction in the wind resistance reduction slot wedge structure.

[0007] In one embodiment, the first flow guide part comprises a plurality of flow guide inclined surfaces, the plurality of flow guide inclined surfaces are arranged in sequence along the gas flow direction, and the inclination angle of the plurality of flow guide inclined surfaces gradually decreases along the gas flow direction.

[0008] In one embodiment, the first flow guide part comprises a plurality of flow guide arc surfaces, the plurality of flow guide arc surfaces are arranged in sequence along the gas flow direction, and the inclination angle of the tangent plane of the plurality of flow guide arc surfaces gradually decreases along the gas flow direction.

[0009] In one embodiment, the inclination angle is greater than or equal to 20° and less than or equal to 60°.

[0010] In one embodiment, the number of flow guide inclined surfaces or flow guide arc surfaces is 2.

[0011] In one embodiment, the first flow guide part protrudes in a direction away from the central axis of the wind blocking part.

[0012] In one embodiment, a plurality of second flow guide parts are arranged in the fixed part, the plurality of second flow guide parts are arranged around the central axis of the fixed part, and the flow direction of the second flow guide part is the same as the gas flow direction in the wind resistance reduction slot wedge structure.

[0013] In one of the embodiments, the flow guiding surface of the second flow guiding part is a slope, a zigzag surface or an arc surface structure.

[0014] In one of the embodiments, a stator skeleton accommodating slot is arranged on the fixing part.

[0015] The wind resistance slot wedge structure can be inserted into the slot opening of the stator slot of the stator core, and can block the flow direction of the high-speed airflow in the stator core to the stator slot of the stator core during high-speed operation of the rotor, which can reduce the friction between the high-speed airflow and the stator core, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor, and improve the efficiency of the motor.

[0016] A stator, comprising: a stator body and the wind resistance slot wedge structure of any one of the above.

[0017] The wind resistance part of the wind resistance slot wedge structure is inserted into the slot opening of the corresponding stator slot of the core of the stator body.

[0018] In one of the embodiments, a first flow guiding part is arranged on the sidewall of the fixing part of the wind resistance part near the central axis of the wind resistance slot wedge structure, and the flow guiding direction of the first flow guiding part is the same as the flow direction of the gas in the wind resistance slot wedge structure.

[0019] The first flow guiding part protrudes in a direction away from the central axis of the wind resistance part, and the protruding part of the first flow guiding part is attached to the inner wall of the core.

[0020] The wind resistance part of the wind resistance slot wedge structure can be inserted into the slot opening of the stator slot of the stator core, and can block the flow direction of the high-speed airflow in the stator core to the stator slot of the stator core during high-speed operation of the rotor, which can reduce the friction between the high-speed airflow and the stator core, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor, and improve the efficiency of the motor.

[0021] A motor, comprising the stator described above.

[0022] The wind resistance part of the wind resistance slot wedge structure can be inserted into the slot opening of the stator slot of the stator core, and can block the flow direction of the high-speed airflow in the stator core to the stator slot of the stator core during high-speed operation of the rotor, which can reduce the friction between the high-speed airflow and the stator core, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor, and improve the efficiency of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A cross-sectional view of a stator provided by the prior art;

[0024] Figure 2 A structural schematic diagram of the wind resistance reduction groove wedge structure provided by an embodiment of the present application is shown in FIG. 1.

[0025] Figure 3 A structural schematic diagram of the stator provided by an embodiment of the present application is shown in FIG. 2.

[0026] Figure 4 An exploded schematic diagram of the stator provided by an embodiment of the present application is shown in FIG. 3.

[0027] Figure 5 A sectional schematic diagram of the stator provided by an embodiment of the present application is shown in FIG. 4.

[0028] Figure 6 A bottom view of the wind resistance reduction groove wedge structure provided by an embodiment of the present application is shown in FIG. 5.

[0029] Figure 7 A structural schematic diagram of the first flow guide part provided by an embodiment of the present application is shown in FIG. 6.

[0030] Figure 8 A structural schematic diagram of the first flow guide part provided by another embodiment of the present application is shown in FIG. 7.

[0031] Figure 9 A top view of the wind resistance reduction groove wedge structure provided by an embodiment of the present application is shown in FIG. 8.

[0032] Figure 10 A top view of the wind resistance reduction groove wedge structure provided by another embodiment of the present application is shown in FIG. 9.

[0033] Figure 11 A top view of the wind resistance reduction groove wedge structure provided by another embodiment of the present application is shown in FIG. 10.

[0034] In the drawings, the various reference numbers are explained as follows:

[0035] 100, wind resistance reduction groove wedge structure; 110, fixed part; 110a, positioning framework displacement slot; 120, wind blocking part; 130, first flow guide part; 131, flow guide inclined surface; 131a, first flow guide inclined surface; 131b, second flow guide inclined surface; 132, flow guide arc surface; 132a, first flow guide arc surface; 132b, second flow guide arc surface; 140, second flow guide part; 210, stator core; 210a, stator slot; 220, machine base; 230, stator winding; a, inclination angle. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different manners without the specific details, and it is to be understood that the present application is not limited to the specific embodiments described below and that the specific embodiments are given for the purposes of exemplification only.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar terms as used herein are for the purpose of description only and are not intended to be limiting.

[0042] As shown in Figure 1 , the existing stator generally comprises a stator frame 220, a stator core 210 (see Figure 3 and Figure 4 ) and a stator winding 230; the stator core 210 is uniformly provided with a plurality of stator slots 210a in the circumferential direction, and the stator slots 210a extend along the length direction of the stator core 210 and penetrate through the upper and lower side walls of the stator core 210. The rotor is located in the stator core 210, and when the rotor rotates, high-speed airflow is generated in the stator core 210, part of the high-speed airflow enters the stator slot 210a through the slot opening of the stator slot 210a, which is not conducive to the oil return of the compressor, increases the loss of the motor, and reduces the efficiency of the motor. Among them, Figure 1 the arrow represents the direction of the high-speed airflow.

[0043] To solve the above technical problems, in one aspect, an embodiment of the present application provides a wind resistance reducing slot wedge structure 100, as shown in Figure 2 , the wind resistance reducing slot wedge structure 100 comprises a fixed part 110 and a plurality of wind blocking parts 120 connected with the fixed part 110; the plurality of wind blocking parts 120 are arranged around the central axis of the fixed part 110. Among them, as shown in Figure 5 , a first flow guide part 130 is arranged on the side wall of the wind blocking part 120 close to the central axis of the fixed part 110, and the flow direction of the first flow guide part 130 is the same as the gas flow direction in the wind resistance reducing slot wedge structure 100. It is to be noted that the central axis of the fixed part 110 is parallel to the length direction of the fixed part 110.

[0044] As an example, the wind resistance reducing slot wedge structure 100 is installed on the stator of the motor, specifically, as shown in Figure 3 and Figure 4 , each wind blocking part 120 on the wind resistance reducing slot wedge structure 100 is inserted into the corresponding slot opening of the stator slot 210a on the stator core 210 in an interference fit, and the first flow guide part 130 protrudes into the stator slot 210a (i.e. it is necessary to ensure that Figure 5The inner tangent circle 1 of the first flow guide 130 is smaller than the inner circle of the stator core 210. When the rotor rotates, the high-speed airflow generated in the stator core 210 flows in the direction represented by the arrow Figure 6 , as shown in the figure. It can be seen that the high-speed airflow flows in the preset direction and does not flow into the stator slot 210a. Figure 6

[0045] The structure of the wind blocking part 120 is matched with the slot structure of the stator slot 210a. For example, if the slot of the stator slot 210a is a two-layer stepped structure as shown in the figure, the wind blocking part 120 is also set to a structure matched with the two-layer stepped structure, and the length of the wind blocking part 120 is the same as the length of the stator core 210. Similarly, the structure of the fixing part 110 should also be matched with the structure of the stator core 210. For example, if the stator core 210 is a cylinder as shown in the figure, the fixing part 110 is set to a ring shape matched with the cylinder. Figure 6 Figure 3 Figure 4

[0046] In addition, the number and distribution of the wind blocking part 120 are the same as the number and distribution of the stator slot 210a on the stator core 210. For example, if the stator core 210 is provided with nine stator slots 210a uniformly distributed along the circumferential direction of the stator core 210 as shown in the figure, the number of the wind blocking part 120 is also nine, and the nine wind blocking parts 120 are uniformly distributed along the circumferential direction of the stator core 210. Figure 3 Figure 4 As an example, the wind blocking part 120 can be integrally formed with the fixing part 110, for example, by die casting. Similarly, the first flow guide 130 can be integrally formed with the fixing part 110, for example, by die casting. The material of the wind blocking part 120 and the fixing part 110 can be non-magnetic material such as polytetrafluoroethylene, polyvinyl chloride, PBT (polybutylene terephthalate), etc.

[0047]

[0048] ​​​​​​The wind blocking part 120 can be inserted into the slot opening of the stator slot 210a of the stator core 210, and can block the high-speed airflow in the stator core 210 from flowing into the stator slot 210a of the stator core 210 during high-speed rotation of the rotor, thereby reducing the friction between the high-speed airflow and the stator core 210, reducing the friction noise, facilitating oil return of the motor, reducing the loss of the motor, improving the efficiency of the motor, and reducing the radial wind resistance of the rotor during rotation, thereby forming high-pressure airflow in the radial direction of the rotor.

[0049] In some embodiments of the present application, as shown in Figure 8 The first flow guide part 130 includes a plurality of flow guide inclined surfaces 132, the plurality of flow guide inclined surfaces 132 are sequentially distributed along the gas flow direction, and the inclination angle α of the plurality of flow guide inclined surfaces 132 gradually decreases along the gas flow direction. It should be noted that the inclination angle α of the flow guide inclined surface 132 refers to the angle between the flow guide inclined surface 132 and the horizontal direction as shown in Figure 8 In addition, the length of each flow guide inclined surface 132 is the same as the length of the stator core 210.

[0050] Optionally, the number of flow guide inclined surfaces 132 is 2, which can realize the function of flow guide and simplify the structure of the first flow guide part 130.

[0051] Optionally, the inclination angle α is greater than or equal to 20° and less than or equal to 60°. In this way, by setting the inclination angle α of the flow guide inclined surface 132, the radial airflow flowability can be improved. For example, the first flow guide part 130 as shown in Figure 7 has two flow guide inclined surfaces 132, namely a first flow guide inclined surface 132a and a second flow guide inclined surface 132b, wherein the inclination angle α of the first flow guide inclined surface 132a is 25°, and the inclination angle α of the second flow guide inclined surface 132b is 20°.

[0052] In some other embodiments of the present application, as shown in Figure 7 The first flow guide part 130 includes a plurality of flow guide arc surfaces 131, the plurality of flow guide arc surfaces 131 are sequentially distributed along the gas flow direction, and the inclination angle α of the tangent plane of the plurality of flow guide arc surfaces 131 gradually decreases along the gas flow direction. It should be noted that the inclination angle α of the tangent plane of the flow guide arc surface 131 refers to the angle between the tangent plane of the flow guide arc surface 131 and the horizontal direction as shown in Figure 8 In addition, the length of each flow guide arc surface 131 is the same as the length of the stator core 210.

[0053] Optionally, the number of the flow guiding arc surfaces 131 is 2, which can realize the function of guiding flow and simplify the structure of the first flow guiding part 130.

[0054] Optionally, the inclination angle a is greater than or equal to 20° and less than or equal to 60°. In this way, the inclination angle a of the tangent plane of the flow guiding arc surface 131 can improve the flowability of the radial airflow. Figure 7 For example, the first flow guiding part 130 shown has 2 flow guiding arc surfaces 131, namely a first flow guiding arc surface 131a and a second flow guiding arc surface 131b, wherein the inclination angle a of the tangent plane of the first flow guiding arc surface 131a is 25°, and the inclination angle a of the tangent plane of the second flow guiding arc surface 131b is 20°.

[0055] As shown in Figure 5 and Figure 6 In some embodiments of the present application, the first flow guiding part 130 protrudes towards the direction away from the central axis of the wind blocking part 120. It should be noted that the central axis of the wind blocking part 120 is perpendicular to the central axis of the fixing part 110. When installing the wind resistance reducing slot wedge structure 100, the protruding part of the first flow guiding part 130 can be arranged on the inner wall of the stator core 210. If only the wind blocking part 120 is used to block the slot of the stator slot 210a, a closed cylindrical structure will be formed in the stator core 210, which leads to a large cogging torque of the stator. In this regard, a part of the first flow guiding part 130 protrudes to ensure that the airflow in the stator core 210 is not so uniform, thereby reducing the cogging torque.

[0056] In some embodiments of the present application, as shown in Figures 2 to 5 A plurality of second flow guiding parts 140 are arranged in the fixing part 110, which surround the central axis of the fixing part 110, and the flow direction of the second flow guiding part 140 is the same as the airflow direction in the wind resistance reducing slot wedge structure 100. The second flow guiding part 140 can cooperate with the first flow guiding part 130 to improve the flowability of the airflow.

[0057] The number of the second flow guiding part 140 is not specifically limited in the embodiments of the present application, as long as it can play a guiding flow role. For example, Figures 2 to 5 The fixing part 110 shown has 4 second flow guiding parts 140 arranged uniformly along the circumferential direction of the fixing part 110.

[0058] Optionally, the second flow guiding part 140 can be integrally formed with the fixing part 110, for example, by pressure casting. The material of the second flow guiding part 140 can be polytetrafluoroethylene, polyvinyl chloride, PBT, etc. non-magnetic material.

[0059] Optionally, as shown in Figure 5As shown, the diameter of the inscribed circle 2 of the second flow guide part 140 is smaller than the diameter of the inscribed circle 1 of the first flow guide part 130, so that the oil return effect of the motor can be improved.

[0060] In some embodiments of the present application, the flow guide surface of the second flow guide part 140 is Figure 9 a bevel surface as shown, Figure 10 a zigzag surface as shown, or Figure 11 an arc surface structure as shown. Of course, in other embodiments, the flow guide surface of the second flow guide part 140 can also be provided in other structures as long as it can play a flow guide role. It should be noted that the flow guide surface of the second flow guide part 140 refers to the side surface near the central axis of the fixed part 110 and which is smoothly transitioned with the inner wall of the fixed part 110.

[0061] In some embodiments of the present application, as shown, Figure 2 the fixed part 110 is provided with a stator skeleton accommodation slot 110a. The stator skeleton can be accommodated in the stator skeleton accommodation slot 110a to ensure normal assembly of the wind resistance reduction slot wedge structure 100.

[0062] The structure of the stator skeleton accommodation slot 110a is matched with the structure of the end of the stator skeleton, for example, if the structure of the end of the stator skeleton is Figure 1 a semicircular structure as shown, the structure of the stator skeleton accommodation slot 110a is provided as a semicircular slot structure matched with the semicircular structure. In addition, the number and distribution of the stator skeleton accommodation slot 110a are the same as the number and distribution of the stator slot 210a, for example, if Figure 6 the stator core 210 is provided with nine stator slots 210a uniformly distributed along the circumferential direction of the stator core 210 as shown, the number of the stator skeleton accommodation slot 110a is also nine, and the nine stator skeleton accommodation slots 110a are uniformly distributed along the circumferential direction of the stator core 210 and are alternately distributed with the stator slots 210a.

[0063] On the one hand, an embodiment of the present application also provides a stator, as shown in Figure 7 and Figure 8 the stator body and the wind resistance reduction slot wedge structure 100 described in any one of the above; the wind blocking part 120 of the wind resistance reduction slot wedge structure 100 is inserted into the slot opening of the corresponding stator slot 210a of the stator core 210 of the stator body.

[0064] It should be noted that the stator body includes the above-mentioned stator base 220, stator core 210 and stator winding 230.

[0065] As an example, the first flow guide part 130 is arranged on the side wall of the wind blocking part 120 near the central axis of the fixed part 110, and the flow guide direction of the first flow guide part 130 is the same as the gas flow direction in the wind resistance reduction slot wedge structure 100.

[0066] As described above, the wind blocking part 120 of the wind resistance reduction slot wedge structure 100 can be inserted into the slot opening of the stator slot 210a of the stator core 210, and can block the high-speed airflow in the stator core 210 from flowing into the stator slot 210a of the stator core 210 during high-speed rotation of the rotor, which can reduce the friction between the high-speed airflow and the stator core 210, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor, improve the efficiency of the motor, and reduce the radial wind resistance of the rotor during rotation, thereby forming a high-pressure airflow in the radial direction of the rotor.

[0067] In some embodiments of the present application, as shown in Figure 1 The first flow guiding part 130 protrudes towards the direction away from the central axis of the wind blocking part 120, and the protruding part of the first flow guiding part 130 is attached to the inner wall of the stator body.

[0068] It should be noted that the central axis of the wind blocking part 120 is perpendicular to the central axis of the fixed part 110. When installing the wind resistance reduction slot wedge structure 100, the protruding part of the first flow guiding part 130 can be attached to the inner wall of the stator core 210. If only the wind blocking part 120 is used to block the slot opening of the stator slot 210a, a closed cylindrical structure will be formed in the stator core 210, which results in a large cogging torque of the stator. To this end, a part of the first flow guiding part 130 is protruded to ensure that the airflow in the stator core 210 is not uniform, thereby reducing the cogging torque.

[0069] On the other hand, another embodiment of the present application also provides a motor, as shown in Figure 1 The motor comprises the above-mentioned stator.

[0070] As an example, the first flow guiding part 130 is arranged on the side wall of the wind blocking part 120 close to the central axis of the fixed part 110, and the flow guiding direction of the first flow guiding part 130 is the same as the direction of the airflow in the wind resistance reduction slot wedge structure 100.

[0071] The wind blocking part 120 of the wind resistance groove wedge structure 100 can be inserted into the slot opening of the stator slot 210a of the stator core 210, and can block the high-speed airflow in the stator core 210 from flowing into the stator slot 210a of the stator core 210 during high-speed rotation of the rotor, which can reduce the friction between the high-speed airflow and the stator core 210, reduce the friction noise, facilitate oil return of the motor, reduce the loss of the motor, improve the efficiency of the motor, and reduce the radial wind resistance of the rotor during rotation, thereby forming high-pressure airflow in the radial direction of the rotor.

[0072] As an example, the motor is a permanent magnet synchronous motor.

[0073] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0074] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A wind resistance reduction groove wedge structure, characterized in that, The wind resistance reduction groove wedge structure (100) includes: a fixing part (110) and a plurality of windbreak parts (120) connected to the fixing part (110). The plurality of windbreaks (120) surround the central axis of the fixing part (110); A first flow guide (130) is provided on the side wall of the windbreak (120) near the central axis of the fixing part (110). The flow guide direction of the first flow guide (130) is the same as the gas flow direction in the wind resistance reduction groove wedge structure (100). The first flow guide (130) includes: a plurality of flow guide slopes (132), the plurality of flow guide slopes (132) being distributed sequentially along the gas flow direction, and the inclination angle (α) of the plurality of flow guide slopes (132) gradually decreasing along the gas flow direction; and / or, the first flow guide (130) includes: a plurality of flow guide arc surfaces (131), the plurality of flow guide arc surfaces (131) being distributed sequentially along the gas flow direction, and the inclination angle (α) of the cross-section of the plurality of flow guide arc surfaces (131) gradually decreasing along the gas flow direction.

2. The wind resistance reduction groove wedge structure according to claim 1, characterized in that, The tilt angle (α) is greater than or equal to 20º and less than or equal to 60º.

3. The wind resistance reduction groove wedge structure according to claim 1, characterized in that, The number of the guide slope (132) or the guide arc surface (131) is 2.

4. The wind resistance reduction groove wedge structure according to claim 1, characterized in that, The first guide portion (130) protrudes in a direction away from the central axis of the windbreak portion (120).

5. The wind resistance reduction groove wedge structure according to claim 1, characterized in that, The fixing part (110) is provided with a plurality of second flow guides (140), which surround the central axis of the fixing part (110). The flow guide direction of the second flow guides (140) is the same as the gas flow direction in the wind resistance reduction groove wedge structure (100).

6. The wind resistance reduction groove wedge structure according to claim 5, characterized in that, The guiding surface of the second guide section (140) is a slope, sawtooth surface or arc surface structure.

7. The wind resistance reduction groove wedge structure according to claim 1, characterized in that, The fixing part (110) is provided with a stator frame relief groove (110a).

8. A stator, characterized in that, The stator includes: a stator body and a wind resistance reducing groove wedge structure (100) as described in any one of claims 1-7. The wind-blocking part (120) of the wind-reducing groove wedge structure (100) is inserted into the slot of the corresponding stator slot (210a) on the iron core (210) of the stator body.

9. The stator according to claim 8, characterized in that, A first flow guide (130) is provided on the side wall of the fixing part (110) near the central axis of the wind-reducing groove wedge structure (100) in the wind-blocking part (120). The flow guide direction of the first flow guide (130) is the same as the gas flow direction in the wind-reducing groove wedge structure (100). The first guide portion (130) protrudes in a direction away from the central axis of the windbreak portion (120), and the protruding part of the first guide portion (130) is attached to the inner wall of the iron core (210).

10. An electric motor, characterized in that, The motor includes the stator as described in claim 8 or 9.

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