Stator cooling structure and motor

Abstract

The utility model discloses a stator cooling structure and a motor, and belongs to the motor field, and the stator cooling structure comprises a stator structure which is composed of a plurality of iron core windings arranged in a circumferential array; a sealing cavity for accommodating the stator structure is formed in the stator shell, and an annular cooling channel is formed between the stator shell and the stator structure; wherein the stator shell is provided with a medium inlet and a medium outlet which are communicated with the cooling channel, the medium inlet and the medium outlet are oppositely arranged, and a cooling medium flowing into the cooling channel from the medium inlet is suitable for being divided into two paths so as to flow to the medium outlet respectively. By adopting the structure, the cooling effect and the cooling efficiency of the stator structure can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator cooling structure and a motor. Background Art

[0002] During motor operation, heat is generated by the coils and stator core and transferred to the outside. If the motor's heat dissipation capacity is insufficient, the motor will overheat. In the stator, excessively high temperatures can damage the coil insulation, leading to a short circuit and motor burnout. To ensure safe and reliable motor operation, a cooling structure is required to dissipate heat.

[0003] For example, Chinese invention patent CN202311726164.8 discloses a motor cooling structure, comprising a motor housing and a stator core fixed in the motor housing, an oil passage formed between the stator core and the motor housing, and an oil inlet and an oil outlet connected to the oil passage provided on the motor housing. However, the oil inlet and the oil outlet of the above-mentioned cooling structure are arranged adjacent to each other on the same side of the motor housing, and the coolant flowing into the oil passage from the oil inlet only flows along a single path to the oil outlet, resulting in low cooling efficiency; and the stator core comprises a yoke and a plurality of teeth arranged in a circumferential array on the yoke. When the stator core is installed in the motor housing, the contact surface between the yoke and the motor housing is large, which is not conducive to the cooling and heat dissipation of the stator core.

[0004] Therefore, it is necessary to improve the prior art to overcome the above defects. Utility Model Content

[0005] The purpose of the utility model is to provide a stator cooling structure and a motor, so as to improve the cooling effect and cooling efficiency of the stator structure.

[0006] The purpose of the utility model is achieved through the following technical solutions: a stator cooling structure, comprising:

[0007] The stator structure consists of a number of iron core windings arranged in a circumferential array;

[0008] A stator housing is formed with a sealed cavity for accommodating the stator structure, and an annular cooling channel is formed between the stator housing and the stator structure;

[0009] The stator housing is provided with a medium inlet and a medium outlet communicating with the cooling channel. The medium inlet and the medium outlet are arranged opposite to each other. The cooling medium flowing into the cooling channel from the medium inlet is suitable for being split into two paths to flow to the medium outlet respectively.

[0010] Furthermore, the sealed cavity has an annular structure, an outer cooling channel is formed between the outer edge of the stator structure and the outer edge of the sealed cavity, an inner cooling channel is formed between the inner edge of the stator structure and the inner edge of the sealed cavity, and a connecting channel connecting the outer cooling channel and the inner cooling channel is formed between two adjacent core windings.

[0011] Furthermore, the stator cooling structure includes:

[0012] a plurality of external blocking members disposed in the outer cooling channel and spaced apart along the circumference of the stator structure;

[0013] a plurality of inner baffles, disposed in the inner cooling channel and spaced apart along the circumference of the stator structure;

[0014] Wherein, a plurality of the outer blocking members and the inner blocking members are respectively arranged on both sides of the medium inlet and / or the medium outlet, and the outer blocking members and the inner blocking members are staggered in the circumferential direction of the stator structure.

[0015] Furthermore, the outer barrier members and the inner barrier members located on the same side are arranged alternately.

[0016] Furthermore, the medium inlet and the medium outlet are both arranged at the outer edge of the sealed cavity, the number of the external blocking members is N, N is an even number, and N≥2, and the number of the internal blocking members is N-2.

[0017] Furthermore, several of the outer barriers and / or the inner barriers are rotationally symmetrically distributed around the axis of the stator structure; or, the outer barriers and / or the inner barriers on both sides of the medium inlet and the medium outlet are axisymmetrically distributed around the line connecting the medium inlet and the medium outlet as the axis of symmetry.

[0018] Furthermore, the core winding includes:

[0019] Iron core;

[0020] A coil, wound around the iron core;

[0021] Wherein, the outer barrier and the inner barrier are provided with plug-in portions on the sides facing the coil, and the plug-in portions are suitable for plugging and matching with the coil.

[0022] Furthermore, the stator housing comprises:

[0023] The outer shell is a through structure in the axial direction of the stator structure;

[0024] an inner shell, housed in the outer shell, wherein the sealed cavity is formed between the outer shell and the inner shell;

[0025] Two cover plates, respectively covering the two open sides of the outer shell, at least one of the cover plates being detachably connected to the outer shell;

[0026] Wherein, the stator structure and the inner shell are both fixed to the cover plate.

[0027] Furthermore, the stator structure abuts between the two cover plates at both axial ends thereof; or, a cooling gap is formed between the stator structure and one of the cover plates, and the cooling medium is suitable for flowing from the medium inlet to the medium outlet along the cooling gap.

[0028] In addition, the present invention also provides a motor, comprising the aforementioned stator cooling structure.

[0029] Compared with the prior art, the present invention has the following beneficial effects: the present invention adopts the above-mentioned structure, and an annular cooling channel is formed between the stator structure and the stator shell. The stator shell is provided with a medium inlet and a medium outlet communicated with the cooling channel. The cooling medium can circulate into and out of the cooling channel through the medium inlet and the medium outlet. In this process, the cooling medium directly contacts the iron core winding for heat exchange, thereby improving the cooling effect of the stator structure and extending the service life of the motor; and a plurality of iron core windings arranged in a circumferential array are used to form the stator structure of the motor. The stator structure is a split structure, which avoids the formation of a yoke, reduces the contact area between the stator structure and the stator shell, and is beneficial to the heat dissipation of the stator structure; in addition, the medium inlet and the medium outlet are arranged relative to each other, and the cooling medium flowing into the cooling channel from the medium inlet is suitable for being divided into two paths to flow to the medium outlet respectively, thereby ensuring that the stator structure is fully immersed while realizing rapid circulation of the cooling medium and improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a cross-sectional schematic diagram of the stator cooling structure of the present utility model.

[0031] Figure 2 It is a schematic diagram of the exploded structure of the stator cooling structure of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the internal and external barrier parts of the utility model.

[0033] Figure 4 It is a structural schematic diagram of the inner barrier in the utility model.

[0034] Description of reference numerals:

[0035] 100. Stator structure; 110. Core winding; 111. Core; 112. Coil; 200. Stator shell; 210. Sealed cavity; 211. Medium inlet; 212. Medium outlet; 213. Inlet hole; 214. Outlet hole; 220. Outer shell; 230. Inner shell; 240. Cover plate; 310. External cooling channel; 320. Internal cooling channel; 330. Connecting channel; 410. External barrier; 420. Internal barrier; 430. Connecting part; 440. Guide surface. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] See also Figure 1 and Figure 2As shown, a stator cooling structure corresponding to a preferred embodiment of the present invention includes a stator structure 100 and a stator housing 200. The stator structure 100 is composed of a plurality of iron core windings 110 arranged in a circumferential array. A sealed cavity 210 is formed on the stator housing 200. The stator structure 100 is fixedly accommodated in the sealed cavity 210. An annular cooling channel is formed between the stator structure 100 and the stator housing 200. The stator housing 200 is provided with a medium inlet 211 and a medium outlet 212 that communicate with the cooling channel. The cooling medium can circulate into and out of the cooling channel through the medium inlet 211 and the medium outlet 212. During this process, the cooling medium directly contacts the iron core winding 110 for heat exchange, thereby improving the cooling effect of the stator structure 100 and extending the service life of the motor. In addition, a plurality of iron core windings 110 arranged in a circumferential array are used to form the stator structure 100 of the motor. The stator structure 100 is a split structure, avoiding the formation of a yoke, reducing the contact area between the stator structure 100 and the stator housing 200, and facilitating heat dissipation of the stator structure 100.

[0040] Preferably, the medium inlet 211 and the medium outlet 212 are arranged opposite each other. The cooling medium flowing into the cooling channel from the medium inlet 211 is adapted to be split into two paths, each flowing to the medium outlet 212. This ensures that the stator structure 100 is fully immersed while achieving rapid circulation of the cooling medium, thereby improving cooling efficiency. The cooling medium can specifically be water, oil, or other coolant, which is not limited in the present invention.

[0041] Furthermore, the core winding 110 includes an iron core 111 and a coil 112 wound around the outside of the iron core 111. The cross-section of the iron core 111 perpendicular to the axial direction of the stator structure 100 is roughly trapezoidal, preferably an isosceles trapezoid, which includes a lower base facing the outer edge of the sealed cavity 210 and an upper base facing the inner edge of the sealed cavity 210. The connection line of the multiple upper bases is circular to form the outer edge of the stator structure 100, and the connection line of the multiple lower bases is circular to form the inner edge of the stator structure 100. The coils 112 correspond to the iron core 111 one by one, and each coil 112 is electrically connected to each other. The inner and outer contours of the coils 112 are the same, and their inner contours are adapted to the outer contour of the iron core 111, so that the coils 112 can be sleeved outside the iron core 111.

[0042] Furthermore, the sealed cavity 210 has an annular structure. An outer cooling channel 310 is formed between the outer edge of the stator structure 100 and the outer edge of the sealed cavity 210. An inner cooling channel 320 is formed between the inner edge of the stator structure 100 and the sealed cavity 210. A gap is provided between adjacent core windings 110 to form a connecting channel 330. The connecting channel 330 is arranged along the radial direction of the stator structure 100, and its ends are connected to the outer cooling channel 310 and the inner cooling channel 320, respectively. By adopting this structure, the cooling medium flowing into the sealed cavity 210 can fully contact the circumference of the core windings 110, further improving the heat dissipation effect.

[0043] Furthermore, the medium inlet 211 and the medium outlet 212 can be both located on the outer edge or inner edge of the sealed cavity 210; or, one of the medium inlet 211 and the medium outlet 212 can be located on the outer edge of the sealed cavity 210, while the other can be located on the inner edge of the sealed cavity 210. This is not a limitation of the present invention. Preferably, both the medium inlet 211 and the medium outlet 212 are located on the outer edge or inner edge of the sealed cavity 210 to facilitate processing of the medium inlet 211 and the medium outlet 212. As a more preferred embodiment, the medium inlet 211 and the medium outlet 212 are both arranged at the outer edge of the sealed cavity 210, which facilitates the connection of the medium inlet 211 and the medium outlet 212 with the external circulation system. Moreover, since the circulation stroke of the outer cooling channel 310 is greater than the circulation stroke of the inner cooling channel 320, after the cooling medium flows into the outer cooling channel 310, it will not flow quickly to the medium outlet 212, so the cooling medium is more likely to flow into the inner cooling channel 320 through the connecting channel 330. When a fixed amount of cooling medium is pumped into the stator case 200, the cooling medium can more evenly infiltrate the outer cooling channel 310, the inner cooling channel 320 and the connecting channel 330, thereby improving the heat dissipation effect.

[0044] In addition, under normal circumstances, the gap between the stator structure 100 and the sealed cavity 210 is large, while the gap between two adjacent core windings 110 is small. The cooling medium is more likely to flow along the cooling channel connected to the medium inlet 211, and the cooling medium is not easy to enter the connecting channel 330 and another cooling channel, affecting the uniform cooling of the circumference of the core winding 110.

[0045] Preferably, the stator cooling structure includes a plurality of outer barriers 410 and inner barriers 420. The outer barriers 410 are disposed in the outer cooling channel 310 and are spaced apart along the circumference of the stator structure 100. The inner barriers 420 are disposed in the inner cooling channel 320 and are also spaced apart along the circumference of the stator structure 100. The outer barriers 410 and inner barriers 420 are disposed on both sides of the medium inlet 211 and / or the medium outlet 212, and are staggered along the circumference of the stator structure 100.

[0046] By adopting the above structure, the outer barrier 410 is suitable for blocking the outer cooling channel 310, and the inner barrier 420 is suitable for blocking the inner cooling channel 320. After the cooling medium flows along the outer cooling channel 310 for a certain distance, it is blocked by the outer barrier 410 and forced to flow into the inner cooling channel 320 through the connecting channel 330. After the inner cooling medium flows along the inner cooling channel 320 for a certain distance, it is blocked by the inner barrier 420 and forced to flow back to the outer cooling channel 310 through the connecting channel 330, so that the cooling medium can evenly contact the inner and outer edges of the stator structure 100 and the gap between the core windings 110.

[0047] Preferably, the outer barrier 410 and the inner barrier 420 located on the same side are arranged alternately, so that there is only one inner barrier 420 between two adjacent outer barrier members 410 on the same side, and / or there is only one outer barrier 410 between two adjacent inner barrier members 420 on the same side. This can ensure the uniformity of the flow of the cooling medium while reducing the number of outer barrier members 410 and / or inner barrier members 420 and simplifying the cooling structure.

[0048] Furthermore, when the medium inlet 211 and the medium outlet 212 are both located at the outer edge of the sealed cavity 210, the outer barrier 410 adjacent to the medium inlet 211 is closer to the medium inlet 211 than the inner barrier 420 adjacent to the medium inlet 211, and the outer barrier 410 adjacent to the medium outlet 212 is closer to the medium outlet 212 than the inner barrier 420 adjacent to the medium outlet 212, thereby facilitating smoother flow of the cooling medium. When the medium inlet 211 and the medium outlet 212 are both located at the inner edge of the sealed cavity 210, the inner barrier 420 adjacent to the medium inlet 211 is closer to the medium inlet 211 than the outer barrier 410 adjacent to the medium inlet 211, and the inner barrier 420 adjacent to the medium outlet 212 is closer to the medium outlet 212 than the outer barrier 410 adjacent to the medium outlet 212, thereby facilitating smoother flow of the cooling medium.

[0049] Preferably, the plurality of outer barriers 410 and / or inner barriers 420 are rotationally symmetrically distributed around the axis of the stator structure 100; alternatively, the outer barriers 410 and / or inner barriers 420 on both sides of the medium inlet 211 and the medium outlet 212 are axially symmetrically distributed around the line connecting the medium inlet 211 and the medium outlet 212 as the axis of symmetry, so as to improve the uniformity of the cooling medium after diversion and improve the flow effect of the cooling medium.

[0050] In this embodiment, the medium inlet 211 and the medium outlet 212 are both located at the outer edge of the sealed cavity 210. The number of external barriers 410 is N, where N is an even number and N ≥ 2. The number of internal barriers 420 is N-2. The specific number N can be 4, 6, 8, etc., preferably 4. Accordingly, the number of internal barriers 420 is 2, which significantly reduces the number of barriers while ensuring effective cooling medium circulation. Of course, in other embodiments, the medium inlet 211 and the medium outlet 212 can also be located at the inner edge of the sealed cavity 210. In this case, the number of internal barriers 420 is N, and the number of external barriers 410 is N-2.

[0051] Further, refer to Figure 3 and Figure 4 As shown, both the outer barrier 410 and the inner barrier 420 are block-shaped structures. The outer contour of the outer barrier 410 matches the inner contour of the outer cooling channel 310, while the outer contour of the inner barrier 420 matches the inner contour of the inner cooling channel 320. This ensures a close fit between the barrier and the cooling channel, improving the cooling medium barrier performance. The outer barrier 410 and the inner barrier 420 are flush with the two end surfaces of the stator structure 100 at their axial ends, respectively, to reliably block flow in the cooling channel. The outer and inner barriers 410, 420 are provided with protruding plug-in portions 430 on the sides facing the coil 112. At least one plug-in portion 430 is spaced apart along the axial direction of the stator structure 100. These plug-in portions 430 are adapted to engage with the coil 112, allowing the barriers to better fit the coil 112, keeping it in close contact with the stator structure 100 and improving the flow blocking effect. They also serve to separate the crossover wires of the coil 112 and secure the coil 112. Preferably, the outer and inner barriers 410, 420 are secured to the coil 112 by gluing to improve their stability after installation.

[0052] In one embodiment, the outer barrier 410 is positioned between the bottom of the core 111 and the outer edge of the sealed cavity 210, and / or the inner barrier 420 is positioned between the bottom of the core 111 and the inner edge of the sealed cavity 210, thereby improving the convenience and reliability of barrier installation. Of course, in other embodiments, the outer barrier 410 may be positioned at the end of the communication channel 330 facing the outer edge of the sealed cavity 210, and / or the inner barrier 420 may be positioned at the end of the communication channel 330 facing the inner edge of the sealed cavity 210. The outer barrier 410 and / or the inner barrier 420 may be provided with a guide surface 440 for guiding the coolant into the communication channel 330, thereby avoiding the formation of dead angles at the outer barrier 410 and / or the inner barrier 420, thereby facilitating the coolant flow between the two cooling channels. The guide surface 440 may be a curved surface or a stepped surface, which is not limited in the present invention.

[0053] Furthermore, the stator case 200 includes an outer shell 220, an inner shell 230, and a cover plate 240. The outer shell 220 is a through-structure in the axial direction of the stator structure 100. The inner shell 230 is accommodated in the outer shell 220. There are two cover plates 240, which respectively cover the two open sides of the outer shell 220. The stator structure 100 and the inner shell 230 are both fixed to the cover plates 240, and the sealed cavity 210 is formed between the inner shell 230 and the outer shell 220. The outer barrier 410 can be integrally formed with the outer shell 220 and / or the cover plate 240, or fastened by gluing, screws, etc. The inner barrier 420 can be integrally formed with the inner shell 230 and / or the cover plate 240, or fastened by gluing, screws, etc.

[0054] Furthermore, the inner edge of the outer shell 220 and the outer edge of the inner shell 230 are both circular, and the sealed cavity 210 formed between the outer shell 220 and the inner shell 230 is annular. The stator structure 100 is coaxially arranged with the sealed cavity 210. With this structure, both the outer cooling channel 310 and the inner cooling channel 320 are circular, avoiding dead angles and facilitating smoother cooling medium flow. Preferably, the radial dimension of the outer cooling channel 310 is smaller than that of the inner cooling channel 320, ensuring a more balanced flow of cooling medium into the outer and inner cooling channels 310 and 320.

[0055] Furthermore, in the axial direction of the stator structure 100, the end of the outer shell 220 is flush with the end of the inner shell 230. The cover plate 240 covers the ends of both the outer shell 220 and the inner shell 230, thereby ensuring the sealing of the sealed cavity 210 while simplifying the structure of the cover plate 240. At least one cover plate 240 is detachably connected to the outer shell 220 to ensure that the stator structure 100 and the inner shell 230 can be smoothly installed in the sealed cavity 210.

[0056] In one embodiment, one cover plate 240 is integrally formed with the outer housing 220, while the other cover plate 240 is secured to the outer housing 220 via connectors, thereby simplifying the assembly process of the stator housing 200. In another embodiment, both cover plates 240 are secured to the outer housing 220 via connectors, facilitating the processing and forming of the outer housing 220. Accordingly, the inner housing 230 may be integrally formed with one of the cover plates 240 to simplify the assembly process of the stator housing 200. Alternatively, the inner housing 230 and the cover plate 240 may be separately formed and then assembled and secured together via connectors to facilitate the processing and forming of the inner housing 230. The connectors may specifically be threaded connectors such as bolts and screws. Preferably, sealing structures may be provided between the cover plate 240 and the outer housing 220, and between the cover plate 240 and the inner housing 230, to enhance the sealing performance of the sealed cavity 210. These sealing structures may include, but are not limited to, rubber rings, silicone rings, and the like.

[0057] Furthermore, one axial end of the stator structure 100 is a mounting end for fixedly connecting to one of the cover plates 240. The end surface of the cover plate 240 is concavely provided with a groove (not shown) that is adapted to the outer contour of the iron core 111. The groove corresponds one-to-one to the iron core 111 to facilitate the positioning and installation of the iron core 111.

[0058] In one embodiment, after the stator structure 100 is installed, the other end of the stator structure 100 abuts against another cover plate 240, thereby improving the stability of the stator structure 100 after installation. Of course, in other embodiments, the other end of the stator structure 100 may not abut against the other cover plate 240, thereby forming a cooling gap between the two. The cooling medium may also flow from the medium inlet 211 through the cooling gap to the medium outlet 212, achieving axial contact between the cooling medium and the end surface of the stator structure 100, increasing the contact area between the cooling medium and the stator structure 100 and improving the cooling effect. In addition, the cover plate 240 and / or the end surface of the stator structure 100 connected to the stator structure 100 may be provided with a drainage groove (not shown). The drainage groove is connected to the medium inlet 211 and the medium outlet 212, respectively, allowing the cooling medium to flow through a portion of the end surface of the stator structure 100, further increasing the contact area between the cooling medium and the stator structure 100.

[0059] Furthermore, the medium inlet 211 and the medium outlet 212 are formed along the radial direction of the stator structure 100. The stator housing 200 is recessed inwardly at one axial end surface of the stator structure 100 to form an inlet hole 213 and an outlet hole 214. The end of the inlet hole 213 away from the end surface is connected to the medium inlet 211, and the end of the outlet hole 214 away from the end surface is connected to the medium outlet 212.

[0060] Typically, to achieve a high degree of integration between the circulation system and the motor, the circulation pump of the circulation system is typically positioned on the stator housing 200 on the axial side of the stator structure 100, thereby facilitating a transmission connection with the motor's rotating shaft. By providing the stator housing 200 with an inlet hole 213 and an outlet hole 214 arranged axially along the stator structure 100, the circulation system's piping can be conveniently connected to one end of the inlet hole 213 and / or outlet hole 214 on the end face of the stator housing 200.

[0061] Specifically, when the medium inlet 211 and the medium outlet 212 are both formed on the outer shell 220, the inlet hole 213 and the outlet hole 214 are recessed inwardly from the end surface of the outer shell 220 along the axial direction of the stator structure 100; when the medium inlet 211 and the medium outlet 212 are both formed on the inner shell 230, the inlet hole 213 and the outlet hole 214 are recessed inwardly from the end surface of the inner shell 230 along the axial direction of the stator structure 100.

[0062] The working process of the stator cooling structure of the present invention is as follows: taking the arrangement of four outer barriers 410 and two inner barriers 420 as an example, the outer cooling channel 310 is divided into a first diversion area, a first confluence area and a receiving area by the outer barriers 410, and the inner cooling channel 320 is divided into a second diversion area and a second confluence area by the inner barriers 420, wherein the first diversion area is formed between the two outer barriers 410 adjacent to both sides of the medium inlet 211, the first confluence area is formed between the two outer barriers 410 adjacent to both sides of the medium outlet 212, the receiving area is formed between the two adjacent outer barriers 410 on the same side, and the second diversion area and the second confluence area are formed between the two inner barriers 420.

[0063] After the circulation system pumps the cooling medium into the medium inlet 211, the cooling medium enters the first diversion area and is divided into two paths flowing in opposite directions along the first diversion area. The two paths of cooling medium flow into the second diversion area through the connecting channel 330 at the first diversion area. During this process, the two paths of cooling medium can cooperate to infiltrate the radial gap and outer edge of the stator structure 100 corresponding to the first diversion area, and the inner edge corresponding to the second diversion area.

[0064] After the two cooling media flow into the second diversion area, they continue to flow in the opposite direction along the second diversion area and flow into different receiving areas through the connecting channel 330 at the second diversion area. During this process, the two cooling media cooperate to wet the radial gap between the inner barrier 420 and the outer barrier 410 near the medium inlet 211 of the stator structure 100, as well as the outer edge corresponding to the receiving area.

[0065] Then the two cooling media converge to the second confluence area through the connecting channel 330 at the receiving area. During this process, the two cooling media cooperate to wet the radial gap between the inner barrier 420 and the outer barrier 410 near the medium outlet 212 of the stator structure 100, as well as the inner edge corresponding to the second confluence area; finally, the cooling medium flows into the first confluence area through the connecting channel 330 at the second confluence area, and converges to the medium outlet 212 to flow back to the circulation system. During this process, the cooling medium can wet the radial gap and outer edge of the stator structure 100 corresponding to the first confluence area.

[0066] By adopting the above structure, the cooling medium is evenly distributed under the action of the barrier, thereby achieving efficient and even circulation cooling of the stator structure 100.

[0067] In addition, the present invention further provides a motor comprising a stator cooling structure and a circulation system connected to the stator cooling structure, wherein the stator cooling structure is the aforementioned stator cooling structure. The motor is a radial magnetic field motor or an axial magnetic field motor, and in this embodiment, the axial magnetic field motor is preferably used.

[0068] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A stator cooling structure, characterized in that: include: A stator structure (100) comprising a plurality of iron core windings (110) arranged in a circumferential array; A stator housing (200) is formed with a sealed cavity (210) for accommodating the stator structure (100), and an annular cooling channel is formed between the stator housing (200) and the stator structure (100); The stator housing (200) is provided with a medium inlet (211) and a medium outlet (212) communicating with the cooling channel. The medium inlet (211) and the medium outlet (212) are arranged relative to each other. The cooling medium flowing into the cooling channel from the medium inlet (211) is adapted to be split into two paths to flow to the medium outlet (212) respectively.

2. The stator cooling structure according to claim 1, characterized in that: The sealed cavity (210) is an annular structure; an outer cooling channel (310) is formed between the outer edge of the stator structure (100) and the outer edge of the sealed cavity (210); an inner cooling channel (320) is formed between the inner edge of the stator structure (100) and the inner edge of the sealed cavity (210); and a connecting channel (330) connecting the outer cooling channel (310) and the inner cooling channel (320) is formed between two adjacent core windings (110).

3. The stator cooling structure according to claim 2, characterized in that: The stator cooling structure comprises: a plurality of external blocking members (410) disposed in the external cooling channel (310) and arranged at intervals along the circumference of the stator structure (100); a plurality of inner barrier members (420) disposed in the inner cooling channel (320) and arranged at intervals along the circumference of the stator structure (100); The plurality of outer barrier members (410) and the inner barrier members (420) are respectively arranged on both sides of the medium inlet (211) and / or the medium outlet (212), and the outer barrier members (410) and the inner barrier members (420) are staggered in the circumferential direction of the stator structure (100).

4. The stator cooling structure according to claim 3, characterized in that: The outer barrier members (410) and the inner barrier members (420) located on the same side are arranged alternately.

5. The stator cooling structure according to claim 3, characterized in that: The medium inlet (211) and the medium outlet (212) are both arranged at the outer edge of the sealed cavity (210), the number of the external blocking members (410) is N, N is an even number, and N≥2, and the number of the internal blocking members (420) is N-2.

6. The stator cooling structure according to claim 3, characterized in that: A plurality of the outer barrier members (410) and / or the inner barrier members (420) are rotationally symmetrically distributed around the axis of the stator structure (100); or, the outer barrier members (410) and / or the inner barrier members (420) on both sides of the medium inlet (211) and the medium outlet (212) are axisymmetrically distributed around a line connecting the medium inlet (211) and the medium outlet (212) as an axis of symmetry.

7. The stator cooling structure according to claim 3, characterized in that: The iron core winding (110) comprises: Iron core (111); A coil (112) is wound around the iron core (111); Wherein, the outer barrier (410) and the inner barrier (420) are provided with plug-in portions (430) on the sides facing the coil (112), and the plug-in portions (430) are suitable for plugging and matching with the coil (112).

8. The stator cooling structure according to claim 2, characterized in that: The stator housing (200) comprises: An outer shell (220) is a through structure in the axial direction of the stator structure (100); an inner shell (230) housed in the outer shell (220), wherein the sealed cavity (210) is formed between the outer shell (220) and the inner shell (230); There are two cover plates (240), which are respectively sealed on the two open sides of the outer shell (220), and at least one of the cover plates (240) is detachably connected to the outer shell (220); Wherein, the stator structure (100) and the inner shell (230) are both fixed to the cover plate (240).

9. The stator cooling structure according to claim 8, characterized in that: The stator structure (100) is abutted between two cover plates (240) at both axial ends thereof; alternatively, a cooling gap is formed between the stator structure (100) and one of the cover plates (240), and a cooling medium is suitable for flowing from the medium inlet (211) to the medium outlet (212) along the cooling gap.

10. A motor, characterized in that: The stator cooling structure comprises the stator cooling structure according to any one of claims 1 to 9.

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