Stator assembly

Abstract

The invention discloses a stator assembly, and the stator assembly comprises a stator iron core, the stator iron core is provided with a cooling flow channel which is used for the circulation of a cooling medium, the cooling flow channel extends in the axial direction of the stator iron core and is provided with an inlet and an outlet, and the outlet is disposed at the axial end part of the stator iron core; and the flow guide part is connected with the stator core and is used for guiding the flow of the cooling medium at the outlet. According to the stator assembly, the spraying direction of the cooling medium can be adjusted, the spraying direction can be adaptively adjusted according to complex arrangement of windings at the end of the motor, the cooling medium can cover more areas, the overall cooling effect is more uniform, the running stability of the motor is improved, and particularly, the cooling efficiency of the motor is improved. The adaptive adjustment of the spraying direction enables the cooling medium to be sprayed between the windings, thereby reducing the local overheating risk, and facilitating the prolonging of the service life of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more particularly to a stator assembly. Background Technology

[0002] Currently, vehicle drive motors typically have cooling oil channels on the stator for stator cooling. However, the spray direction of the cooling oil channels is fixed and cannot be adapted to the complex arrangement of the motor end windings. This results in the cooling oil only covering local areas, leaving many end dead zones uncooled, creating a significant temperature gradient and causing uneven overall cooling. This directly affects the stability of motor operation. In particular, the winding ends are often irregularly distributed and have multi-layered winding structures. The fixed-direction oil spray cannot penetrate to the deep gaps, which exacerbates the heat accumulation between the windings, amplifies the risk of local overheating, and shortens the motor's service life. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a stator assembly capable of adjusting the spray direction of the cooling medium. This facilitates adaptive adjustment of the spray direction based on the complex arrangement of the motor end windings, allowing the cooling medium to cover a larger area, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction enables the cooling medium to be sprayed between the windings, thereby reducing the risk of localized overheating and extending the service life of the motor.

[0004] A stator assembly according to an embodiment of this application includes: a stator core, the stator core having a cooling channel for circulating a cooling medium, the cooling channel extending axially along the stator core and having an inlet and an outlet, the outlet being disposed at the axial end of the stator core; and a flow guide connected to the stator core and used to guide the cooling medium at the outlet.

[0005] According to the stator assembly of this application embodiment, a guide element is provided to guide the cooling medium ejected from the outlet, thereby adjusting the spray direction of the cooling medium. This facilitates adaptive adjustment of the spray direction based on the complex arrangement of the motor end windings, allowing the cooling medium to cover a larger area, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction allows the cooling medium to be sprayed between the windings, thereby reducing the risk of local overheating and extending the service life of the motor.

[0006] According to some embodiments of the present application, the stator assembly includes a guide plate and a guide fin. The guide plate is connected to the axial end of the stator core and is provided with a guide port. The guide port communicates with the outlet. The guide fin is connected to the guide plate and is disposed at the edge of the guide port.

[0007] According to some embodiments of the present application, in a stator assembly, the guide fins are located on the side of the mounting plate opposite to the stator core.

[0008] According to some embodiments of the present application, in a stator assembly, at least a portion of the guide fins extend in a direction intersecting the axial direction of the stator core.

[0009] According to some embodiments of the present application, the stator assembly has a first end and a second end disposed opposite to each other, the first end being connected to the mounting plate, and the second end extending obliquely toward the axis of the stator core.

[0010] According to some embodiments of the present application, the stator assembly has guide fins provided with guide teeth and / or guide grooves.

[0011] According to some embodiments of the present application, the stator assembly has multiple flow guide ports and multiple flow guide fins, with each flow guide port and multiple flow guide fins corresponding one-to-one. The multiple flow guide ports are spaced apart around the axis of the stator core, and / or the multiple flow guide ports are spaced apart radially along the stator core.

[0012] The stator assembly according to some embodiments of this application further includes: an intermediate liquid inlet plate along the axial direction of the stator core, the stator core including a first stator core and a second stator core, the intermediate liquid inlet plate being sandwiched between the first stator core and the second stator core, the intermediate liquid inlet plate being provided with a communication port, the communication port being connected to the inlet.

[0013] According to some embodiments of the present application, the stator assembly has two outlets: one outlet is located at the end of the first stator core away from the intermediate liquid inlet plate, and the other outlet is located at the end of the second stator core away from the intermediate liquid inlet plate.

[0014] According to some embodiments of the present application, the stator assembly includes two flow guides, which are respectively disposed at both axial ends of the stator core.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 Illustration of stator components for some embodiments of this application Figure 1 ; Figure 2 Illustration of stator components for some embodiments of this application Figure 2 ; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the flow guide of some embodiments of this application. Figure 1 ; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the flow guide of some embodiments of this application. Figure 2 ; Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 for Figure 6 Enlarged view of point D in the middle; Figure 9 This is a schematic diagram of the flow guide of some embodiments of this application. Figure 3 ; Figure 10 This is a schematic diagram of the flow guide of some embodiments of this application. Figure 3 ; Figure 11 for Figure 10 Enlarged view at point E in the middle; Figure 12 for Figure 2 Sectional view at FF.

[0017] Figure label: Stator assembly 100; Stator core 10; first stator core 101, second stator core 102, cooling channel 13; Flow guide 20; mounting plate 21; flow guide port 22; Guide fins 23, first end 231, second end 232, guide teeth 24; Intermediate liquid inlet plate 30, connecting port 31; Winding 40. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] Currently, vehicle drive motors typically have cooling oil channels on the stator for stator cooling. However, the spray direction of the cooling oil channels is fixed and cannot be adapted to the complex arrangement of the motor end windings. This results in the cooling oil only covering local areas, leaving many end dead zones uncooled, creating a significant temperature gradient and causing uneven overall cooling. This directly affects the stability of motor operation. In particular, the winding ends are often irregularly distributed and have multi-layered winding structures. The fixed-direction oil spray cannot penetrate to the deep gaps, which exacerbates the heat accumulation between the windings, amplifies the risk of local overheating, and shortens the motor's service life.

[0021] In response, this application proposes a stator assembly 100. The following description, in conjunction with the appendix... Figure 1-12 The stator assembly 100 of an embodiment of this application is described.

[0022] like Figure 1 and Figure 2 As shown, the stator assembly 100 according to an embodiment of this application includes: a stator core 10 and a flow guide 20.

[0023] The stator core 10 is provided with a cooling channel 13 for the flow of cooling medium. The cooling channel 13 extends along the axial direction of the stator core 10 and has an inlet and an outlet.

[0024] For example, cooling channels 13 can be disposed on the radial outer peripheral wall of the stator core 10 and / or cooling channels 13 can be disposed on the stator yoke portion of the stator core 10, wherein the stator core 10 typically includes a stator tooth portion and a stator yoke portion, such as Figure 3 As shown, the stator teeth define the stator slots, and the stator slots are used to house the windings 40. The stator yoke is connected to the stator teeth. When the cooling channel 13 is disposed in the stator yoke, the cooling channel 13 can penetrate the stator yoke along the axial direction of the stator core 10 so that the cooling medium can flow along the cooling channel 13 to achieve heat exchange with the stator core 10.

[0025] The cooling medium includes, but is not limited to, cooling oil, water, or gas, and is not limited to these.

[0026] Furthermore, the cooling channel has an inlet and an outlet, which are connected to both ends of the cooling channel, respectively. This allows the cooling medium to enter the cooling channel 13 through the inlet and flow along the cooling channel 13 before being discharged or sprayed out through the outlet.

[0027] In some embodiments, the outlet is located at the axial end of the stator core 10, and the guide member 20 is connected to the stator core 10 and is used to guide the cooling medium at the outlet.

[0028] For example, when it is necessary to control the cooling medium ejected from the outlet to spray towards the radial outer side of the stator core 10, the guide member 20 can be provided at the edge of the outlet near the axis of the stator core 10 and extend inclined towards the radial outer side of the stator core 10, so that the cooling medium ejected from the outlet can be sprayed towards the radial outer side of the stator core 10 after being sprayed onto the guide member 20.

[0029] Alternatively, when it is necessary to control the cooling medium ejected from the outlet to spray towards the winding 40 on the radially inner side of the stator core 10, the guide member 20 can be provided at the edge of the outlet away from the axis of the stator core 10 and extend inclined towards the radially inner side of the stator core 10, so that the cooling medium ejected from the outlet can be sprayed towards the radially inner side of the stator core 10 after being sprayed onto the guide member 20.

[0030] In this way, the cooling medium ejected from the outlet can be guided by the guide component 20, thereby adjusting the spray direction of the cooling medium. This facilitates adaptive adjustment of the spray direction according to the complex arrangement of the motor end windings 40, allowing the cooling medium to cover more areas, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction allows the cooling medium to be sprayed between the windings 40, thereby reducing the risk of local overheating and extending the service life of the motor.

[0031] According to the stator assembly 100 of this application embodiment, a guide member 20 is provided to guide the cooling medium ejected from the outlet, thereby adjusting the spray direction of the cooling medium. This facilitates adaptive adjustment of the spray direction according to the complex arrangement of the motor end windings 40, allowing the cooling medium to cover a larger area, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction allows the cooling medium to be sprayed between the windings 40, thereby reducing the risk of local overheating and extending the service life of the motor.

[0032] In some embodiments, the stator core 10 is formed by stacking multiple stator laminations, wherein each stator lamination is provided with a through hole, and after the multiple stator laminations are stacked, the through holes of any two adjacent stator laminations are provided accordingly.

[0033] This makes the cooling channel 13 formed by stacking multiple stator laminations, which reduces the difficulty of setting up the cooling channel 13.

[0034] In some embodiments, each stator lamination is provided with a stator slot. After multiple stator laminations are stacked together, the stator slots of any two adjacent stator laminations are correspondingly provided to form an axially connected stator slot, thereby reducing the difficulty of setting up the cooling channel 13.

[0035] In some embodiments, an insulating element is provided between the winding 40 and the inner wall of the stator slot. The insulating element may include, but is not limited to, an insulating coating or rubber, so as to prevent the stator core 10 from leaking electricity.

[0036] In some embodiments, such as Figures 4-6 As shown, the flow guide 20 includes a mounting plate 21 and a flow guide fin 23. The mounting plate 21 is connected to the axial end of the stator core 10 and is provided with a flow guide port 22. The flow guide port 22 is connected to the outlet. The flow guide fin 23 is connected to the mounting plate 21 and is provided at the edge of the flow guide port 22.

[0037] It is understandable that the mounting plate 21 can be stamped from silicon steel sheet, and its inner diameter, outer diameter and slot size are consistent with the stator lamination. That is, the mounting plate 21 is also provided with a clearance slot corresponding to the stator slot, which facilitates the assembly of the winding 40 and ensures that the setting of the mounting plate 21 will not affect the radial dimension of the stator core 10.

[0038] like Figure 4 and Figure 5As shown, the mounting plate 21 has a through-hole 22 along its thickness direction. The position of the through-hole 22 in the axial direction of the stator core 10 is basically consistent with the position of the through-hole of the stator lamination, so that the through-hole 22 communicates with the outlet. The guide fins 23 are connected to the mounting plate 21 and are located at the edge of the through-hole 22. The guide fins 23 can be stamped. This allows the guide fins 23 to have a certain structural strength and makes them close to the through-hole 22, thus enabling the guide fins 23 to guide the cooling medium sprayed through the through-hole 22.

[0039] In some embodiments, the flow guide fins 23 are located on the side of the mounting plate 21 opposite to the stator core 10.

[0040] This avoids interference between the flow guide fins 23 and the stator core 10, thereby reducing the difficulty of setting up the flow guide fins 23.

[0041] In some embodiments, such as Figure 7 and Figure 8 As shown, at least a portion of the guide fins 23 extend in a direction parallel to the axial direction of the stator core 10 (e.g., Figure 7 and Figure 8 The left and right directions intersect.

[0042] In this way, the guide fins 23 can guide the cooling medium ejected from the guide port 22.

[0043] In some embodiments, the guide fins 23 are streamlined along the axial direction of the stator core 10 and located radially outside the guide port 22. The shape and position of the guide fins 23 are optimized to generate a Coanda effect on the flow of the cooling medium, guide the spray direction of the cooling medium, and enable the cooling medium to be sprayed over a larger area, even when the flow rate of the cooling medium is small.

[0044] In some embodiments, such as Figure 8 As shown, the guide fin 23 has a first end 231 and a second end 232 disposed opposite to each other. The first end 231 is connected to the mounting plate 21, and the second end 232 extends obliquely toward the axis of the stator core 10. In this way, the guide fin 23 can guide the cooling medium ejected from the guide port 22.

[0045] In some embodiments, the shapes of the guide fins 23 and the guide port 22 can be adjusted as needed, and the shapes of the guide fins 23 and the guide port 22 can be set to various forms such as rectangle, trapezoid, and semicircle.

[0046] It is understandable that the flow guide fins 23 and flow guide ports 22 can be set to any of the above-mentioned shapes, so that the shapes of the flow guide fins 23 and flow guide ports 22 can be designed arbitrarily, thereby reducing the design difficulty of the flow guide fins 23 and flow guide ports 22.

[0047] In some embodiments, multiple flow guide ports 22 and multiple flow guide fins 23 are provided, and the multiple flow guide ports 22 and multiple flow guide fins 23 correspond one-to-one.

[0048] It is understandable that the number of guide ports 22 should be the same as the number of cooling channels 13, that is, each cooling channel 13 is provided with a corresponding guide port 22, so that the cooling medium sprayed at the outlet of each cooling channel 13 can be guided by the corresponding guide fins 23. This facilitates the increase of heat exchange with the stator core 10 through multiple cooling channels 13, and facilitates the guidance of the cooling medium sprayed by multiple cooling channels 13 through multiple guide fins 23, thereby enabling the cooling medium to cover more areas, making the overall cooling effect more uniform and improving the stability of motor operation.

[0049] In some embodiments, such as Figure 4 , Figure 9 and Figure 10 As shown, multiple flow guides 22 are spaced apart around the axis of the stator core 10.

[0050] In this way, multiple guide ports 22 can spray the cooling medium at different positions in the radial direction of the stator core 10, thereby allowing the cooling medium to cover a larger area, making the overall cooling effect more uniform and improving the stability of motor operation.

[0051] and / or as Figure 4 As shown, multiple flow guides 22 are arranged radially spaced along the stator core 10.

[0052] In this way, multiple guide ports 22 can spray the cooling medium at different distances in the radial direction of the stator core 10, thereby allowing the cooling medium to cover a larger area in the radial direction, making the overall cooling effect more uniform and improving the stability of motor operation.

[0053] In some embodiments, such as Figure 4 As shown, the flow guide 22 can be provided in two sets. The two sets of flow guide 22 are spaced apart in the radial direction of the mounting plate 21, and each set of flow guide 22 includes multiple flow guide 22 spaced apart around the center of the mounting plate 21.

[0054] In this way, the two sets of guide ports 22 can spray the cooling medium at different distances in the radial direction of the stator core 10, so that the cooling medium can cover more areas in the radial direction, making the overall cooling effect more uniform and improving the stability of motor operation.

[0055] In some embodiments, such as Figure 9 As shown, some of the flow guide ports 22 are spaced apart around the center of the mounting plate 21 to form an outer ring flow guide port, and another part of the flow guide ports 22 is located radially inside the outer ring flow guide port and corresponds to the outer ring flow guide port.

[0056] In this way, the two sets of guide ports 22 can spray the cooling medium at different distances in the radial direction of the stator core 10, so that the cooling medium can cover more areas in the radial direction, making the overall cooling effect more uniform and improving the stability of motor operation.

[0057] In some embodiments, such as Figure 10 As shown, a set of guide ports 22 can be provided, and a set of guide ports 22 includes multiple guide ports 22 spaced apart around the center of the mounting plate 21.

[0058] In this way, the two sets of guide ports 22 can spray the cooling medium at different positions in the circumferential direction of the stator core 10, so that the cooling medium can cover more areas in the radial direction, making the overall cooling effect more uniform and improving the stability of motor operation.

[0059] In some embodiments, such as Figure 11 As shown, the guide fin 23 is provided with guide teeth 24 and / or guide grooves.

[0060] For example, the free end of the guide fin 23 is provided with a guide groove, which facilitates the improvement of the guide effect of the guide fin 23.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, the stator assembly 100 further includes an intermediate liquid inlet plate 30. Along the axial direction of the stator core 10, the stator core 10 includes a first stator core 101 and a second stator core 102. The intermediate liquid inlet plate 30 is sandwiched between the first stator core 101 and the second stator core 102. Both the first stator core 101 and the second stator core 102 are provided with cooling channels 13, such as... Figure 12 As shown, the intermediate liquid inlet plate 30 is provided with a connecting port 31, which is connected to the inlet.

[0062] It is understandable that the flow path of the cooling medium is as follows: it enters the cooling channel 13 through the communication port 31 of the intermediate liquid inlet plate 30 located at the middle position of the axial direction of the stator core 10, and then flows axially along the cooling channel 13. That is, the cooling medium can enter the cooling channel 13 radially along the stator core 10, and then be sprayed out axially along the stator core 10.

[0063] In this way, after the cooling medium enters the cooling channel 13 along the connecting port 31, it can simultaneously flow to the cooling channel 13 of the first stator core 101 and the cooling channel 13 of the second stator core 102, thereby enabling the first stator core 101 and the second stator core 102 to be cooled at the same time, which facilitates the improvement of the heat exchange efficiency of the stator core 10.

[0064] In some embodiments, the outer diameter of the intermediate liquid inlet plate 30 is 2mm to 4mm smaller than the outer diameter of the stator core 10.

[0065] This ensures that the placement of the intermediate liquid inlet plate 30 does not affect the radial dimension of the stator core 10, thereby facilitating the miniaturization of the stator core 10 in terms of radial dimension.

[0066] In some embodiments, there are two outlets: one outlet is located at the end of the first stator core 101 away from the intermediate liquid inlet plate 30, and the other outlet is located at the end of the second stator core 102 away from the intermediate liquid inlet plate 30.

[0067] In this way, after the cooling medium enters the cooling channel 13 along the connecting port 31, it can simultaneously flow to the cooling channel 13 of the first stator core 101 and the cooling channel 13 of the second stator core 102, so that the first stator core 101 and the second stator core 102 can be cooled at the same time. Then, the cooling medium in the cooling channel 13 of the first stator core 101 can be sprayed to one axial end of the stator core 10, and the cooling medium in the cooling channel 13 of the second stator core 102 can be sprayed to the other axial end of the stator core 10.

[0068] This allows the cooling medium to be sprayed simultaneously at both ends of the stator core 10, thereby improving the cooling effect on the stator core 10 and the windings 40 located at the ends. It also allows the cooling medium to cover a larger area, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction allows the cooling medium to be sprayed between the windings 40 at both ends, thereby reducing the risk of local overheating and extending the service life of the motor.

[0069] In some embodiments, two guide members 20 are provided, and the two guide members 20 are respectively disposed at both ends of the stator core 10.

[0070] In this way, one guide member 20 can guide the cooling medium sprayed on the cooling channel 13 of the first stator core 101 at one axial end of the stator core 10, and the other guide member 20 can guide the cooling medium sprayed on the cooling channel 13 of the second stator core 102 at the other axial end of the stator core 10.

[0071] This allows the spray direction of the cooling medium to be adjusted simultaneously at both ends of the stator core 10, thereby improving the cooling effect on the stator core 10 and the windings 40 located at the ends. It also allows the cooling medium to cover a larger area, resulting in a more uniform overall cooling effect and improved motor operation stability. In particular, the adaptive adjustment of the spray direction allows the cooling medium to be sprayed between the windings 40 at both ends, thereby reducing the risk of local overheating and extending the service life of the motor.

[0072] In summary, the principle of the stator assembly 100 of this application is as follows: During oil cooling, cooling oil enters from the intermediate inlet plate 30 and flows along the cooling channels 13 of the first stator core 101 and the second stator core 102, respectively, and exits from the guide ports 22 located at both axial ends of the stator core 10. During exit, guide fins 23 are provided on the radially outer side of the guide ports 22. These guide fins 23 exhibit a Coanda effect on the fluid, allowing the fluid to be sprayed onto the ends of the winding 40 according to the angle designed for the fins. This optimizes the spray angle and effect, achieving a larger spray area. Furthermore, different fin shapes and numbers can be set according to the oil flow characteristics at different locations of the stator assembly 100. For example, different inclination angles can be set for the guide ports 22 located at the bottom and the top, thereby reducing the loss of cooling oil at the bottom and improving the spray effect.

[0073] This application makes full use of the Coanda effect of fluids. By setting guide fins 23 at the outlet of the cooling channel 13 of the stator core 10, the shape, number and tilt angle of the guide fins 23 can be adjusted to take into account the cooling needs of the stator ends at different positions and with different flow rates, thereby achieving a larger area and better angle of spraying, thus improving the heat dissipation effect of the stator winding 40 (especially the ends).

[0074] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly (100) characterized by, The application relates to a stator core (10) provided with a cooling flow channel (13) for circulating a cooling medium, the cooling flow channel (13) extending along the axial direction of the stator core (10) and being provided with an inlet and an outlet, the outlet being arranged at the axial end of the stator core (10); and a flow guide (20) connected to the stator core (10) and used for guiding the cooling medium at the outlet. The flow guide (20) comprises a mounting plate (21) connected to the axial end of the stator core (10) and provided with a flow guide opening (22) in communication with the outlet, and a flow guide fin (23) connected to the mounting plate (21) and arranged at the edge of the flow guide opening (22). The flow guide fin (23) is located on the side of the mounting plate (21) away from the stator core (10).

2. The stator assembly (100) of claim 1, characterized in that At least part of the flow guide fin (23) extends in a direction intersecting the axial direction of the stator core (10).

3. The stator assembly (100) of claim 2, characterized in that The flow guide fin (23) has oppositely arranged first and second ends (231, 232), the first end (231) being connected to the mounting plate (21), and the second end (232) extending obliquely towards the direction close to the axis of the stator core (10).

4. The stator assembly (100) of claim 2, characterized in that The flow guide fin (23) is provided with flow guide teeth (24) and / or flow guide grooves.

5. The stator assembly (100) of claim 4, characterized in that The flow guide opening (22) and the flow guide fin (23) are both provided with a plurality of flow guide openings (22) and flow guide fins (23) in one-to-one correspondence, wherein 6. The stator assembly (100) of claim 2, wherein, The plurality of flow guide openings (22) are arranged at intervals around the axis of the stator core (10), and / or the plurality of flow guide openings (22) are arranged at intervals along the radial direction of the stator core (10).

7. The stator assembly (100) of claim 2, wherein, The application further relates to an intermediate liquid inlet plate (30) arranged between the first and second stator cores (101, 102) in the axial direction of the stator core (10), the intermediate liquid inlet plate (30) being provided with a communication opening (31) in communication with the inlet, and the first and second stator cores (101, 102) being both provided with the cooling flow channel (13). The outlet is provided with two outlets, one outlet being arranged at the end of the first stator core (101) away from the intermediate liquid inlet plate (30), and the other outlet being arranged at the end of the second stator core (102) away from the intermediate liquid inlet plate (30).

8. The stator assembly (100) according to any one of claims 1-7, characterized in that The flow guide (20) is provided with two flow guides (20), and the two flow guides (20) are arranged at the two axial ends of the stator core (10) respectively. ​ 9. The stator assembly (100) of claim 8, characterized in that ​ 10. The stator assembly (100) of claim 9, characterized in that ​

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