Stator assembly and motor with same

Abstract

The invention provides a stator assembly and a motor with the same, and the stator assembly comprises a stator core which is provided with a stator groove; the flow guide part is connected with the stator core, and at least part of the flow guide part protrudes out of the inner ring of the stator core and is located in an air gap between the stator core and the rotor; the flow guide piece is provided with a flow guide convex cambered surface, and the protruding direction of the flow guide convex cambered surface is opposite to the rotation direction of the rotor. Through the technical scheme provided by the invention, the technical problem of poor cooling effect of the air cooling technology on the motor in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator assembly and a motor having the same. Background Art

[0002] At present, the magnetic levitation high-speed motor used in air compressors has a compact structure design and high power density. The heat generated during the operation of the motor is also large. If the cooling system of the motor cannot effectively dissipate the heat of the motor, the insulating paint of the motor stator winding will fail or burn, and the contact between different phase windings will cause a short circuit and burn. At the same time, excessive motor temperature will demagnetize the magnetic steel and cause irreversible damage to the rotor. In today's industry, air cooling technology has been widely used in high-speed motor cooling methods due to its flexible and convenient use conditions.

[0003] However, when air cooling technology is used to cool the motor, the cooling air enters from the air inlet in the motor barrel, flows through the air gap between the stator slot and the stator and rotor, and then flows out from the air outlet in the barrel. In this process, the cooling air will take away some of the heat generated during the operation of the motor. However, due to the high slot fill rate of high-speed motors, there are fewer paths for cooling air to flow in the stator slots, so most of the cooling air will flow through the air gap between the stator and rotor of the motor. However, in order to ensure that the magnetic circuit performance of the motor is not lost, the air gap between the stator and rotor is often designed to be very small, which results in a very small circulation path for the cooling air. Under the combined effect of the above reasons, the cooling effect of air cooling technology on high-speed motors will be greatly reduced. Summary of the invention

[0004] The main purpose of the present invention is to provide a stator assembly and a motor having the same, so as to solve the technical problem that the air cooling technology in the prior art has a poor cooling effect on the motor.

[0005] In order to achieve the above object, according to one aspect of the present invention, a stator assembly is provided, comprising:

[0006] A stator core, wherein the stator core is provided with stator slots;

[0007] A flow guide is connected to the stator core, at least a portion of the flow guide protrudes from the inner ring of the stator core and is located in the air gap between the stator core and the rotor;

[0008] The flow guide member has a flow guide convex arc surface, and the convex direction of the flow guide convex arc surface is opposite to the rotation direction of the rotor.

[0009] Further, the guide member is fixedly installed at the stator slot, and at least a portion of the guide member extends out of the slot opening of the stator slot.

[0010] Furthermore, the flow guide member is provided with a flow guide hole penetrating through both ends of the flow guide member.

[0011] Furthermore, the extension direction of the guide hole is parallel to the axial direction of the stator core or is inclined at a preset angle; and / or,

[0012] There are a plurality of guide holes, and the plurality of guide holes are arranged at intervals along the arrangement direction from the stator core to the rotor.

[0013] Furthermore, the flow guide is a strip-shaped structure;

[0014] Wherein, the extension direction of the flow guide is parallel to the axial direction of the stator core or inclined at a preset angle; or,

[0015] The flow guide is a strip-shaped structure, and the angle between the extending direction of the flow guide and the axial direction of the stator core is c, 0°<c<10°.

[0016] Further, there are multiple flow guide members;

[0017] Wherein, a plurality of flow guides are arranged at intervals at the slot openings of the stator slots; or,

[0018] There are a plurality of stator slots, which are arranged at intervals along the periphery of the stator core, and at least one flow guide is provided at the slot opening of each stator slot.

[0019] Furthermore, there are a plurality of flow guides, and the plurality of flow guides are arranged at intervals at the slot openings of the stator slots;

[0020] A plurality of flow guides are arranged at intervals along a first predetermined direction, and the first predetermined direction is arranged at a first predetermined angle with the axial direction of the stator core; or,

[0021] The guide members are arranged at intervals along a first predetermined direction to form a guide row group, and the first predetermined direction is set at a first predetermined angle to the axial direction of the stator core; there are multiple guide row groups, and the multiple guide row groups are arranged at intervals along a second predetermined direction, and the second predetermined direction is set at a second predetermined angle to the first predetermined direction.

[0022] Furthermore, the stator assembly further comprises:

[0023] The flow guide base is at least partially clamped at the notch of the stator slot, and the flow guide piece is fixedly arranged on the flow guide base.

[0024] Furthermore, the guide base includes a clamping portion and an abutting portion that are connected to each other. The clamping portion is adapted to the portion of the stator slot near the slot opening. The clamping portion is clamped at the portion of the stator slot near the slot opening. The abutting portion extends out of the slot opening and abuts against the end wall located on the side of the slot opening.

[0025] Furthermore, the stator assembly also includes a stator winding, which is arranged in the stator slot; the end surface of the guide base located in the stator slot is abutted and matched with the stator winding.

[0026] Furthermore, the guide base includes a spliced ​​clamping piece and a sealing piece, the clamping piece is clamped at the notch of the stator slot, the clamping piece is provided with a first positioning portion, the first positioning portion is located in the stator slot, and the sealing piece is provided with a second positioning portion adapted to the first positioning portion, and an end of the sealing piece away from the clamping piece is abutted and cooperated with the stator winding arranged in the stator slot.

[0027] Further, the angle between the tangent line of one end of the flow-guiding convex curved surface and the tangent line of the other end of the flow-guiding convex curved surface is a, 90°<a<180°; and / or,

[0028] The flow guide member also has a flow guide concave arc surface arranged opposite to the flow guide convex arc surface.

[0029] According to another aspect of the present invention, a motor is provided, comprising the stator assembly provided above.

[0030] The technical solution of the present invention is applied, by arranging a flow guide on the stator, the flow guide is located in the air gap between the stator core and the rotor, and the convex direction of the flow guide convex arc surface is opposite to the rotation direction of the rotor. In this way, when the motor is running, the rotor uses the friction force of the outer surface to drive the cooling air circulating in the air gap to rotate, and the flow guide convex arc surface is used to cut and guide the rotating cooling air, and the contact between the cut cooling air and the outer surface of the rotor in a highly rotating state is increased. At the same time, by setting the convex direction of the flow guide convex arc surface of the flow guide, the speed and flow rate of the cooling air when flowing through the air gap can be increased, so as to extract the heat generated during the operation of the motor, thereby effectively improving the cooling effect of air cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 A schematic structural diagram of a stator assembly provided in an embodiment of the present invention is shown;

[0033] Figure 2 Shows Figure 1 A magnified view of some structures in ;

[0034] Figure 3 A schematic structural diagram of the axial end surface of the flow guide provided in an embodiment of the present invention is shown;

[0035] Figure 4 A side view of a convex surface of a flow guide provided according to an embodiment of the present invention is shown;

[0036] Figure 5A schematic structural diagram of a flow guide base and a flow guide member provided according to an embodiment of the present invention is shown;

[0037] Figure 6 A schematic structural diagram of a blocking member provided according to an embodiment of the present invention is shown;

[0038] Figure 7 A schematic diagram showing the flow direction of airflow in an air gap according to an embodiment of the present invention is shown;

[0039] Figure 8 A schematic diagram showing the flow direction of airflow in an air gap in the prior art is shown;

[0040] Fig. 9 A schematic diagram of the structure of the bottom of the flow guide member and the flow guide base provided according to an embodiment of the present invention is shown;

[0041] Fig.10 A schematic structural diagram of a motor provided according to an embodiment of the present invention is shown.

[0042] The above drawings include the following reference numerals:

[0043] 100, stator core; 110, stator slot;

[0044] 200, flow guide member; 210, flow guide convex arc surface; 220, flow guide hole; 230, flow guide concave arc surface;

[0045] 300, guide base; 310, clamping member; 311, clamping portion; 312, abutting portion; 313, first positioning portion; 320, blocking member; 321, second positioning portion;

[0046] 400. Rotor. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] like Figures 1 to 7 , Fig. 9 As shown, the first embodiment of the present invention provides a stator assembly, which includes a stator core 100 and a flow guide 200. The stator core 100 is provided with a stator slot 110. The flow guide 200 is connected to the stator core 100. At least part of the flow guide 200 protrudes from the inner ring of the stator core 100 and is located in the air gap between the stator core 100 and the rotor 400. The flow guide 200 has a flow guide convex arc surface 210, and the protruding direction of the flow guide convex arc surface 210 is opposite to the rotation direction of the rotor 400.

[0049] By adopting the technical solution provided in this embodiment, when the motor is running, the rotor 400 uses the friction force of the outer surface to drive the circulating cooling air in the air gap to rotate, and cuts and guides the rotating cooling air through the guide convex arc surface 210, and the contact between the cut cooling air and the outer surface of the rotor 400 in a highly rotating state is increased. At the same time, by setting the convex direction of the convex arc surface of the guide member 200, the speed and flow rate of the cooling air when flowing through the air gap can be increased, so as to extract the heat generated during the operation of the motor, thereby effectively improving the cooling effect of air cooling. Therefore, the stator assembly provided in this embodiment can solve the technical problem that the air cooling technology in the prior art has a poor cooling effect on the motor.

[0050] It should be noted that the convex direction of the guide convex arc surface 210 is opposite to the rotation direction of the rotor 400. It can be understood that the rotating wind caused by the rotation of the rotor 400 will directly impact the guide convex arc surface 210, and the guide convex arc surface 210 will achieve the cutting and diversion effect on the cooling air.

[0051] Specifically, the use of air cooling to cool the motor is to first use an external fan to send cooling air into the motor cavity, and then flow through the air gap and take away the heat of the motor. In this process, the rotating rotor 400 will drive the cooling air flowing through the air gap to rotate due to the inherent friction of its outer surface. Utilizing the rotation effect of the above-mentioned cooling air when the motor is working, when the cooling air provided by the external fan enters the rotating air gap part of the motor, the guide convex arc surface 210 of the guide member 200 will increase the contact area and flow rate of the cooling air with the outer surface of the rotor 400, thereby increasing the flow rate and flow rate of the cooling air flowing through the air gap, thereby improving the effect of air cooling technology on suppressing the temperature rise of the motor. In this way, the advantages of high-speed motors such as high speed and high frequency are utilized to overcome the disadvantages of high heat generation and the insignificant cooling effect of air cooling technology on them.

[0052] Specifically, the guide member 200 is fixedly installed at the stator slot 110, and at least a portion of the guide member 200 extends out of the slot opening of the stator slot 110. In this way, the structural layout of the guide member 200 can be optimized and the installation of the guide member 200 can be facilitated.

[0053] Specifically, a blocking rod is generally arranged at the slot opening of the stator slot 110 to block the slot opening of the stator slot 110. In this way, the guide member 200 in the prior art can be conveniently connected to the blocking rod or integrated with the blocking rod, thereby avoiding major improvements to the stator core 100, reducing the production process of the stator core 100, and facilitating production and installation.

[0054] In this embodiment, the guide member 200 is provided with a guide hole 220 that passes through both ends of the guide member 200. With such a structural arrangement, it is possible to facilitate the conduction of airflow through the guide hole 220, avoid the situation where the guide member 200 has a large blocking effect on the airflow, and effectively ensure the smooth flow of the airflow.

[0055] Specifically, the extension direction of the guide hole 220 is parallel to the axial direction of the stator core 100 or is inclined at a preset angle, so that the setting of the guide hole 220 can be further optimized to better guide the flow direction of the airflow and ensure the smooth flow of the airflow. In addition, such a setting can also effectively improve the air cooling effect. Specifically, the preset angle can be an angle less than 10°.

[0056] In this embodiment, there are a plurality of guide holes 220, and the plurality of guide holes 220 are arranged at intervals along the arrangement direction from the stator core 100 to the rotor 400. With such a structural arrangement, it is possible to ensure smooth flow of the airflow along the arrangement direction from the stator core 100 to the rotor 400 of the guide member 200, thereby better reducing the blocking effect of the guide member 200 and further ensuring the air cooling effect of the part located at the guide member 200.

[0057] Specifically, three flow-conducting holes 220 may be provided.

[0058] In this embodiment, the flow guide 200 is a strip-shaped structure.

[0059] Specifically, the extension direction of the guide member 200 is parallel to the axial direction of the stator core 100 or is inclined at a preset angle. In this way, the guide member 200 can be used to fully cut and guide the airflow, thereby better increasing the contact between the cut cooling air and the outer surface of the rotor 400 in a highly rotating state, and also increasing the speed and flow rate of the cooling air when flowing through the air gap, thereby better ensuring the guiding and cutting effect of the guide member 200, so as to better achieve a cooling effect.

[0060] The guide member 200 is a strip-shaped structure, and the angle between the extension direction of the guide member 200 and the axial direction of the stator core 100 is c, 0°<c<10°. Specifically, when the angle is too large, specifically greater than 10°, it is not conducive to the guide convex arc surface 210 to fully contact the cooling wind, nor is it conducive to the guide convex arc surface 210 to effectively cut the cooling wind; when the angle is too small, less than 10°, it will cause the blocking effect of the guide member 200 to be too large, and it will also be not conducive to the guide effect of the guide member 200. Through the above angle setting, the cooling effect of the cooling air can be effectively improved.

[0061] In this embodiment, there are multiple flow guide members 200 .

[0062] Specifically, a plurality of air guides 200 are disposed at intervals at the slot opening of a stator slot 110 , so as to better improve the air cooling effect on the slot opening of the stator slot 110 .

[0063] Specifically, there are multiple stator slots 110, which are arranged at intervals along the periphery of the stator core 100, and at least one guide 200 is provided at the slot opening of each stator slot 110. With such a structural arrangement, it is possible to evenly improve the air cooling effect in the air gap, so as to evenly dissipate heat. Specifically, three guides 200 may be provided at the entrance of each stator slot 110.

[0064] In this embodiment, there are a plurality of flow guide members 200 , and the plurality of flow guide members 200 are arranged at intervals at the slot opening of a stator slot 110 .

[0065] Specifically, a plurality of guide members 200 are arranged at intervals along a first predetermined direction, and the first predetermined direction is set at a first predetermined angle with the axial direction of the stator core 100. In this way, the wind in the air gap can be effectively cut and guided by the plurality of guide members 200. At the same time, the gaps between the plurality of guide members 200 also avoid blocking the airflow, thereby fully realizing the air-cooling and heat dissipation effect of the air gap.

[0066] Alternatively, each guide member 200 is arranged at intervals along a first predetermined direction to form a guide row group, and the first predetermined direction is arranged at a first predetermined angle with the axial direction of the stator core 100; there are multiple guide row groups, and multiple guide row groups are arranged at intervals along a second predetermined direction, so that multiple guide members 200 are arranged in an array. Specifically, the second predetermined direction is arranged at a second predetermined angle with the first predetermined direction, and the second predetermined angle is an angle between 0° and 180°. In this way, it is easy to optimize the structural layout and arrangement of multiple guide members 200, so as to effectively achieve the cooling effect of air cooling.

[0067] In this embodiment, the stator assembly further includes a guide base 300, at least a portion of which is clamped at the notch of the stator slot 110, and the guide member 200 is fixedly arranged on the guide base 300. With such a structural arrangement, the guide member 200 can be easily installed, thereby improving the convenience of operation.

[0068] Specifically, the flow guide base 300 includes a clamping portion 311 and an abutting portion 312 connected to each other, the clamping portion 311 is adapted to the portion of the stator slot 110 close to the slot, the clamping portion 311 is clamped to the portion of the stator slot 110 close to the slot, the abutting portion 312 extends out of the slot, and the abutting portion 312 abuts against the end wall located at the side of the slot. Such a structural setting can further improve the installation stability of the flow guide base 300, and facilitate installation and operation.

[0069] Specifically, the end walls of the sides of the slots may be understood as stator shoes.

[0070] In this embodiment, the stator assembly further includes a stator winding, which is disposed in the stator slot 110; the end surface of the flow guide base 300 located in the stator slot 110 is in abutment with the stator winding. In this way, the flow guide base 300 can not only limit the position of the stator winding, but also facilitate the installation and removal of the flow guide 200.

[0071] In one embodiment, the guide base 300 is an integrally formed structure.

[0072] In another embodiment, the guide base 300 includes a spliced ​​clamping member 310 and a sealing member 320, the clamping member 310 is clamped at the notch of the stator slot 110, the clamping member 310 is provided with a first positioning portion 313, the first positioning portion 313 is located in the stator slot 110, and the sealing member 320 is provided with a second positioning portion 321 adapted to the first positioning portion 313, and the end of the sealing member 320 away from the clamping member 310 is abutted and matched with the stator winding arranged in the stator slot 110. With such a structural setting, it is possible to improve the existing sealing member 320 and match the clamping member 310, which is convenient for production operation, reduces the production process and difficulty, and is easy to install. Specifically, one of the first positioning portion 313 and the second positioning portion 321 is a positioning protrusion, and the other of the first positioning portion 313 and the second positioning portion 321 is a positioning groove.

[0073] Preferably, the clamping member 310 and the guide member 200 may be integrally formed to facilitate production and installation.

[0074] In this embodiment, the angle between the tangent of one end of the guide convex curved surface 210 and the tangent of the other end of the guide convex curved surface 210 is a, 90°<a<180°. With such a setting, it is convenient to effectively achieve the effect of guiding and cutting the wind in the air gap through the guide convex curved surface 210. Specifically, a can be understood as the angle of attack.

[0075] Specifically, the guide member 200 also has a guide concave arc surface 230 arranged opposite to the guide convex arc surface 210. The guide concave arc surface 230 can also play a role in draining and guiding the wind in the air gap to a certain extent, and can also facilitate better improvement of the flow rate and flow rate of the cooling wind in the air gap, thereby better achieving the air cooling effect.

[0076] In this embodiment, by utilizing the rotational effect of the cooling air when the motor is operating, when the cooling air provided by the external fan enters the rotating air gap part of the motor, the guiding convex arc surface 210 will increase the contact area and flow rate between the cooling air and the outer surface of the rotor 400, thereby increasing the flow velocity and flow rate of the cooling air flowing through the air gap, and thus enhancing the effect of the air-cooling technology in suppressing the temperature rise of the motor. In addition, the setting of the angle a of the guiding convex arc surface 210 can further ensure the guiding and cutting effects on the cooling air, so as to better improve the heat dissipation effect. By using the stator assembly provided in the above embodiment and taking advantage of the advantages of high speed and large frequency of the high-speed motor, it can effectively overcome the large amount of heat generated by the motor, and effectively improve the cooling effect of the motor by using the air-cooling technology.

[0077] Specifically, the value range of the angle a is 90° < a < 180°. In this way, it is convenient to better cut and guide the air flow (which can also be understood as the cooling air) in the air gap to better improve the cooling effect.

[0078] Specifically, the protruding direction of the guiding convex arc surface 210 is opposite to the rotation direction of the rotor 400. The value range of the protruding height of the guiding member 200 should be less than the height of the air gap between the stator core 100 and the rotor 400 (that is, the guiding member 200 is arranged at an interval from the rotor 400), and a part of safety margin is left outside the rotor 400, and an axial channel is left for the cooled air after acceleration.

[0079] Specifically, the guiding member 200 can be a guiding vane.

[0080] As Fig. 9 shown, in order to utilize the acceleration effect brought by the rotation direction of the rotor 400 to the cooling air, the arrangement of the guiding member 200 in the axial direction should form a certain angle c with the center line of the motor rotor 400 (which can also be understood as the axial direction of the stator core 100). The value range of the angle c is 0° < c < 10°. The positive and negative selection of this angle should be different from the rotation direction of the rotor 400 to achieve the purpose of accelerating the cooling air by using the rotation direction of the rotor 400.

[0081] Specifically, the installation process of the stator assembly in this embodiment is as follows: first, the left and right mating surfaces of the guide base 300 are aligned with the left and right mating surfaces of the stator slot 110 of the stator core 100, and then the guide base 300 is inserted into the stator slot 110 of the stator core 100. At this time, the left and right mating surfaces of the guide device will respectively contact and fix with the left and right mating surfaces of the stator slot 110 of the stator core 100, so as to prevent the guide member 200 from being affected by the high-velocity and large-flow cooling air in the air gap and thus moving up and down. At the same time, the blocking rod is matched and fixed to play the role of blocking the winding in the stator slot 110. Then, the left, right and lower mating surfaces of the blocking member 320 (the blocking member 320 in this embodiment can also be called a blocking rod) are aligned with the corresponding three mating surfaces of the clamping member 310 and inserted therein, and then the notch of each stator slot 110 of the stator core 100 is assembled according to the above-mentioned assembly method to complete the installation of the stator assembly. Specifically, the materials of the blocking member 320, the guide seat and the guide member 200 are all non-magnetic and non-conductive insulating materials.

[0082] like Figure 7 , Figure 8 , respectively showing the cooling wind flow directions in the air gap of the embodiment of the present invention and the prior art, the straight arrow represents the wind direction, and the curved arrow represents the direction of rotation of the rotor 400. Figure 8 The figure is a flow direction diagram of the air flow in the prior art, the rotor 400 rotates clockwise, and the cooling wind enters from the air gap toward the paper surface. Due to the rotation of the rotor 400, part of the cooling wind airflow flows toward the inside of the paper surface while rotating clockwise. Figure 7 This is the flow diagram of the cooling air of the present invention. The airflow in the air gap near the stator core 100 is rebounded to the air gap between the guide member 200 and the rotor 400 due to the guide convex arc surface 210 of the guide member 200, thereby guiding the flow direction of the airflow. At the same time, the guide holes 220 opened on the guide member 200 allow part of the cooling air to pass through them. Figure 7 Compared to Figure 8 , dividing the wind in the air gap into two layers, the wind pressure of the air flow in the lower layer of the air gap can be enhanced and the flow rate can be faster, so that in the same time, without changing the size of the air gap, more cooling air can flow in and take away more heat, achieving a better cooling effect, and effectively avoiding the reduction in the flow of the upper cooling air due to the setting of the guide member 200.

[0083] like Fig.10 As shown, the second embodiment of the present invention provides a motor, including the stator assembly provided by the above-mentioned first embodiment.

[0084] From the above description, it can be seen that the above embodiments of the present invention solve the following technical problems: when using air cooling technology to reduce the operating temperature rise of high-speed motors, the cooling air flow path is too narrow due to the small air gap between the motor stator and rotor, and the motor heat taken away is small; the external fan provides insufficient cooling air flow; the air cooling technology has a poor effect on reducing the temperature rise of high-speed motors during operation. The corresponding technical effects are: by cooperating and fixing with the slot wedge of the stator slot, and the guide member on the air gap side of the motor is a guide vane formed by stacking plane leaf ridge lines with different leaf height sections; on the premise of satisfying the blocking of the winding in the stator slot, by axially arranging 3 guide vanes at the slot mouth of the stator slot to increase the flow rate and flow of the cooling air flowing through the air gap. When the motor is running, the rotor uses the friction of the outer surface to drive the cooling air circulating in the air gap to rotate. At this time, the angle of attack formed by the guide vanes at the notch of the stator slot can cut and guide the rotating cooling air. The cut cooling air increases the contact with the outer surface of the rotor in a high-speed rotating state. At the same time, with the help of the guide direction setting of the guide vanes, the speed and flow of the cooling air flowing through the stator and rotor air gap are increased, and the heat generated during the operation of the motor is extracted. At the same time, three axial guide holes are set on the guide vane body to avoid the blade cross section of this device from hindering the cooling air. The above scheme can greatly improve the effect of air cooling technology on reducing the temperature rise of high-speed motors. At the same time, this device is very convenient to process and assemble, and the cost is low.

[0085] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0086] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0087] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0089] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: include: A stator core (100), wherein the stator core (100) is provided with stator slots (110); A flow guide (200) connected to the stator core (100), wherein at least a portion of the flow guide (200) protrudes from the inner ring of the stator core (100) and is located in the air gap between the stator core (100) and the rotor (400); The flow guide member (200) has a flow guide convex arc surface (210), and the convex direction of the flow guide convex arc surface (210) is opposite to the rotation direction of the rotor (400).

2. The stator assembly according to claim 1, characterized in that: The flow guide (200) is fixedly mounted on the stator slot (110), and at least a portion of the flow guide (200) extends out of a slot opening of the stator slot (110).

3. The stator assembly according to claim 1, characterized in that: The flow guide member (200) is provided with a flow guide hole (220) penetrating through both ends of the flow guide member (200).

4. The stator assembly according to claim 3, characterized in that: The extension direction of the guide hole (220) is parallel to the axial direction of the stator core (100) or is inclined at a preset angle; and / or, There are a plurality of the guide holes (220), and the plurality of guide holes (220) are arranged at intervals along an arrangement direction from the stator core (100) to the rotor (400).

5. The stator assembly according to claim 1, characterized in that: The flow guide (200) is a strip-shaped structure; Wherein, the extending direction of the flow guide (200) is parallel to the axial direction of the stator core (100) or is inclined at a preset angle; or, The flow guide (200) is a strip-shaped structure, and the angle between the extension direction of the flow guide (200) and the axial direction of the stator core (100) is c, 0°<c<10°.

6. The stator assembly according to claim 1, characterized in that There are multiple flow guide members (200); Wherein, a plurality of the flow guide members (200) are arranged at intervals at the slot openings of the stator slots (110); or, There are a plurality of stator slots (110), and the plurality of stator slots (110) are arranged at intervals along the periphery of the stator core (100), and at least one flow guide (200) is provided at the slot opening of each stator slot (110).

7. The stator assembly according to claim 1, characterized in that There are a plurality of flow guide members (200), and the plurality of flow guide members (200) are arranged at intervals at the slot openings of the stator slots (110); The plurality of flow guides (200) are arranged at intervals along a first predetermined direction, and the first predetermined direction is arranged at a first predetermined angle with the axial direction of the stator core (100); or, The guide members (200) are arranged at intervals along a first predetermined direction to form a guide row group, and the first predetermined direction is set at a first predetermined angle with the axial direction of the stator core (100); there are multiple guide row groups, and the multiple guide row groups are arranged at intervals along a second predetermined direction, and the second predetermined direction is set at a second predetermined angle with the first predetermined direction.

8. The stator assembly according to claim 1, characterized in that The stator assembly further comprises: A flow guide base (300), at least a portion of which is clamped at a notch of the stator slot (110), and the flow guide member (200) is fixedly arranged on the flow guide base (300).

9. The stator assembly according to claim 8, characterized in that The guide base (300) comprises a clamping portion (311) and an abutting portion (312) which are connected to each other, the clamping portion (311) being adapted to a portion of the stator slot (110) close to the slot opening, the clamping portion (311) being clamped to a portion of the stator slot (110) close to the slot opening, the abutting portion (312) extending out of the slot opening, and the abutting portion (312) abutting against an end wall located at a side of the slot opening.

10. The stator assembly according to claim 8, characterized in that The stator assembly further comprises a stator winding, which is arranged in the stator slot (110); the end surface of the guide base (300) located in the stator slot (110) is in abutment with the stator winding.

11. The stator assembly according to claim 8, characterized in that The guide base (300) comprises a spliced ​​clamping member (310) and a sealing member (320); the clamping member (310) is clamped at a notch of the stator slot (110); a first positioning portion (313) is provided on the clamping member (310); the first positioning portion (313) is located in the stator slot (110); a second positioning portion (321) matched with the first positioning portion (313) is provided on the sealing member (320); an end of the sealing member (320) away from the clamping member (310) is in abutment with a stator winding arranged in the stator slot (110).

12. The stator assembly according to claim 1, characterized in that The angle between the tangent line at one end of the flow-guiding convex curved surface (210) and the tangent line at the other end of the flow-guiding convex curved surface (210) is a, 90°<a<180°; and / or, The flow guide member (200) further comprises a flow guide concave arc surface (230) arranged opposite to the flow guide convex arc surface (210).

13. A motor, characterized in that: A stator assembly comprising any one of claims 1 to 12.

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