Stator core end part inclined spray type oil cooling heat dissipation structure and motor

Abstract

The application relates to a stator core end part inclined spray type oil cooling heat dissipation structure and a motor, and relates to the technical field of motor heat dissipation. The stator core end part inclined spray type oil cooling heat dissipation structure comprises a stator core, a stator winding and a heat dissipation frame. The stator winding is arranged in the stator core. An oil inlet is arranged on the heat dissipation frame. A heat dissipation cavity is further arranged in the heat dissipation frame. A plurality of spray parts are further arranged on one side of the heat dissipation frame close to the stator winding. An oil outlet is arranged at the end of each spray part. Each oil outlet is in communication with the heat dissipation cavity and faces the stator winding. A flow resistance plate is arranged on one side of each oil outlet away from the oil inlet. Each flow resistance plate is arranged in the heat dissipation cavity. The application has the effect of improving the uniformity of oil outlet of each oil outlet.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of motor heat dissipation, in particular to a stator core end inclined spray type oil cooling heat dissipation structure and motor. BACKGROUND

[0002] With the continuous development of social economy and the increasing improvement of scientific and technological level, the industry in China is booming, and the motor is widely used as a common part in the fields of transportation, transportation, national defense and the like. With the increasing demand of the load end for the power level and the space volume of the rotating motor, the power density of the rotating motor is continuously improved, the heat flow density is continuously increased, and the heat dissipation demand of the high-power-density rotating motor is continuously increased.

[0003] There is a stator core end inclined spray type oil cooling heat dissipation structure in the prior art, which comprises a stator core, a stator winding and a heat dissipation frame, and the stator winding is arranged in the stator core. The heat dissipation frame is arranged as a semi-annular shape and is installed at the end of the stator core. An oil inlet is formed at the top of the heat dissipation frame, and a heat dissipation cavity is also formed in the heat dissipation frame, which is in communication with the oil inlet. A plurality of oil outlets are also formed on the side of the heat dissipation frame close to the stator winding, and the oil outlets are in communication with the heat dissipation cavity. During use, the cooling medium (i.e. cooling oil) is introduced into the oil inlet, and the cooling oil after being introduced is discharged through each oil outlet, thereby falling onto the stator winding to cool the stator winding.

[0004] According to the related technology in the above, since the heat dissipation frame is arranged as a semi-annular shape and the single oil inlet is only arranged at the top of the heat dissipation frame, the cooling oil can only flow along the inner wall of the heat dissipation cavity under the action of gravity, and the diameter of the oil outlet is often small, which makes the cooling oil flow through the oil outlet above only for a short time and deposit at the bottom of the heat dissipation cavity, thereby reducing the uniformity of the distribution of the cooling oil and further reducing the uniformity of the oil outlet of each oil outlet. Therefore, it needs to be improved. SUMMARY

[0005] In order to improve the uniformity of the oil outlet of each oil outlet, the application provides a stator core end inclined spray type oil cooling heat dissipation structure and motor.

[0006] In the first aspect, the application provides a stator core end inclined spray type oil cooling heat dissipation structure, which adopts the following technical scheme:

[0007] The utility model provides a kind of stator core end inclination spray type oil cooling heat dissipation structure, including stator core, stator winding and heat dissipation frame, the stator winding is set in the stator core, oil inlet is opened in the heat dissipation frame, and heat dissipation cavity is also opened in the heat dissipation frame, and the side of heat dissipation frame close to stator winding still extends several spray, and the end of each spray is opened with oil outlet, and each oil outlet is communicated with the heat dissipation cavity, and all are towards the stator winding, and the side of each oil outlet away from the oil inlet is provided with flow resistance plate, and each flow resistance plate is set in heat dissipation cavity.

[0008] By adopting the above technical scheme, compared with the prior art, the cooling oil in the heat dissipation frame can only pass through the oil outlet above for a short time and deposit at the bottom of the heat dissipation cavity, which reduces the uniformity of the distribution of the cooling oil and further reduces the uniformity of the oil outlet of each oil outlet; by setting the flow resistance plate, the flow resistance plate can hinder the flow of the cooling medium, so that the hindered cooling medium stays near the corresponding oil outlet, thereby increasing the amount of cooling medium near each oil outlet, ensuring the amount of oil outlet (cooling medium) of each oil outlet, and effectively ensuring the amount of oil outlet of the oil outlet at the upper part of the heat dissipation cavity, thereby improving the uniformity of the oil outlet between each oil outlet and effectively ensuring the cooling effect of the stator winding.

[0009] Preferably, the intersection between the inner wall of the heat dissipation cavity along the width direction of the heat dissipation cavity and the inner wall of the heat dissipation cavity where the oil outlet is opened is provided with a flow groove for the rapid flow of the cooling medium.

[0010] By adopting the above technical scheme, the cooling medium in the heat dissipation cavity can enter the flow groove after entering the flow channel, so that the flow groove guides the entering cooling medium to flow along the extension direction of the flow groove, thereby reaching the vicinity of each oil outlet, effectively ensuring the amount of cooling medium near each oil outlet, and further ensuring the uniformity of the oil outlet between the oil outlets.

[0011] Preferably, the inner bottom wall of the heat dissipation cavity further extends a dispersion flow part, the dispersion flow part is located directly below the oil inlet and extends towards the oil inlet to form a protrusion, and the side of the dispersion flow part close to the oil inlet is further provided with two flow accumulation grooves, and the two flow accumulation grooves are located on opposite sides of the oil inlet.

[0012] By adopting the above technical scheme, the cooling medium flowing in through the oil inlet port can flow into the two flow accumulation grooves through the outer wall of the protrusion when falling on the protrusion of the dispersion flow passage, thereby realizing the flow distribution of the cooling medium, so that the cooling medium in the two flow accumulation grooves can flow into both ends of the heat dissipation cavity, thereby ensuring the uniformity of the distribution of the cooling medium in both ends of the heat dissipation cavity.

[0013] Preferably, the top of the dispersion flow passage is further provided with a first flow distribution groove and a second flow distribution groove, the first flow distribution groove is provided in plurality, the plurality of first flow distribution grooves are respectively located on both sides of the dispersion flow passage along the width direction of the heat dissipation cavity, and both ends are in communication with the corresponding flow passage groove, and the second flow distribution groove is located between the plurality of first flow distribution grooves, and both ends extend to the side close to the oil outlet hole.

[0014] By adopting the above technical scheme, the cooling medium in the flow accumulation groove can enter the first flow distribution groove and the second flow distribution groove, and part of the cooling medium can directly enter the corresponding flow passage groove under the guidance of the first flow distribution groove, and part of the cooling medium can flow to the vicinity of the uppermost oil outlet hole under the guidance of the second flow distribution groove, and then flow into the channel between the flow blocking plate and the heat dissipation cavity after being blocked by the corresponding flow blocking plate, thereby ensuring the amount of cooling medium near the uppermost oil outlet hole, and ensuring the amount of cooling medium in the channel, thereby effectively ensuring the amount of cooling medium near each oil outlet hole, and thereby ensuring the uniformity of the oil outlet between the oil outlet holes.

[0015] Preferably, the stator core is arranged in the shell, the shell is further provided with an oil passage, the oil passage is in communication with the oil inlet port, the shell is further provided with a buffer gasket, the buffer gasket is located on the side of the heat dissipation frame away from the stator core, and the shell is further provided with a fastening screw, one end of the fastening screw passes through the buffer gasket and the heat dissipation frame and reaches the stator core.

[0016] By adopting the above technical scheme, the buffer gasket can buffer between the shell and the heat dissipation frame, thereby reducing the amplitude of the shaking of the cooling medium in the heat dissipation frame due to the collision between the heat dissipation frame and the shell when the motor is working, thereby ensuring the oil outlet effect of the oil outlet hole and the heat dissipation effect of the application, and the buffer gasket can also dampen the heat dissipation frame, thereby effectively ensuring the service life of the heat dissipation frame.

[0017] Preferably, the casing is further provided with a positioning frame, which is located in the casing and is in sliding connection with the casing, a positioning groove is formed in the outer side wall of the stator core for embedding the positioning frame, and the casing is further provided with a linkage assembly, which is used to drive the positioning frame to slide when the stator core reaches a specified position, so that the positioning frame is embedded in the positioning groove.

[0018] Through the above technical scheme, the linkage assembly can drive the positioning frame to slide when the stator core reaches a specified position, so that the positioning frame gradually approaches the stator core and is finally embedded in the positioning groove on the stator core, thereby achieving positioning of the positioning core, and at the same time, the positioning core can be prevented from being separated from the casing during installation of the stator core, thereby ensuring smooth installation of the stator core.

[0019] Preferably, the linkage assembly comprises a mounting frame and a linkage frame, the buffer gasket is embedded in the mounting frame, the mounting frame is in sliding connection with the casing, one end of the linkage frame is in rotational connection with the mounting frame, and the other end is in sliding connection with the positioning frame.

[0020] Through the above technical scheme, when the stator core is gradually installed in the casing and the mounting frame is pushed to slide, the mounting frame can drive the linkage frame to displace, thereby making the end of the linkage frame away from the mounting frame drive the positioning frame to slide, so that the positioning frame is gradually inserted into the casing, thereby achieving driving of the linkage frame during installation of the stator core, which effectively facilitates the operation of relevant personnel.

[0021] Preferably, each of the flow resistance plates is offset towards the side close to the oil inlet at both ends along the width direction of the heat dissipation cavity.

[0022] Through the above technical scheme, the cooling medium introduced through the oil inlet can flow along the channel at the junction of the end portions of the heat dissipation cavity after entering the heat dissipation cavity, thereby reducing the probability of the cooling medium being hindered by the flow resistance plates, so that the cooling medium can smoothly flow to the vicinity of each oil outlet, thereby ensuring the uniformity of oil discharge between the oil outlets.

[0023] Preferably, each of the flow resistance plates is connected with the inner wall of the heat dissipation cavity in which the oil outlets are formed, and each of the flow resistance plates is offset towards the side close to the oil inlet at both ends along the width direction of the heat dissipation cavity.

[0024] By adopting the technical scheme, the end box of the flow resistance plate is offset in the direction close to the oil inlet, and the flow resistance plate forms a space with the heat dissipation cavity for the cooling medium to stay, thereby effectively increasing the cooling medium amount near each oil outlet hole, and increasing the stay time of the cooling medium near the oil outlet hole, effectively ensuring the oil output of the oil outlet hole, and further ensuring the oil output uniformity between the oil outlet holes.

[0025] In another aspect, the application provides an electric machine, which adopts the following technical scheme:

[0026] The stator core end inclined spray type oil cooling heat dissipation structure is included.

[0027] In summary, the application has at least one of the following beneficial technical effects:

[0028] 1. The setting of the flow resistance plate enables the flow resistance plate to hinder the flowing cooling medium, and the hindered cooling medium stays near the corresponding oil outlet hole, thereby increasing the cooling medium amount near each oil outlet hole, ensuring the oil output (cooling medium) of each oil outlet hole, and further effectively ensuring the oil output of the oil outlet hole at the upper part of the heat dissipation cavity, thereby improving the oil output uniformity between the oil outlet holes and effectively ensuring the cooling effect of the stator winding;

[0029] 2. The setting of the buffer gasket enables the buffer gasket to buffer between the machine shell and the heat dissipation frame, thereby reducing the amplitude of the shaking of the cooling medium in the heat dissipation frame due to the collision between the heat dissipation frame and the machine shell during the operation of the electric machine, thereby ensuring the oil output effect of the oil outlet hole and the heat dissipation effect of the application, and the buffer gasket can also dampen the heat dissipation frame, thereby effectively ensuring the service life of the heat dissipation frame;

[0030] 3. The setting of the positioning frame and the linkage assembly enables the linkage assembly to drive the positioning frame to slide when the stator core reaches the specified position, so that the positioning frame gradually approaches the stator core and is finally embedded in the positioning groove on the stator core, thereby realizing the positioning of the positioning core, and also preventing the positioning core from separating from the machine shell during the installation of the stator core, thereby ensuring the smooth installation of the stator core. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the stator core end inclined spray type oil cooling heat dissipation structure in the embodiment of the application.

[0032] Figure 2 is a structural schematic view of the heat dissipation frame in the embodiment of the application.

[0033] Figure 3 is a structural schematic view of the flow resistance plate in the embodiment of the application.

[0034] Figure 4 is a structural schematic diagram for embodying the buffer gasket in the embodiments of the present application.

[0035] The label explanation: 1, stator core; 11, mounting portion; 2, stator winding; 3, heat dissipation frame; 31, spraying place; 311, oil outlet hole; 32, resistance plate; 33, oil inlet portion; 34, dispersion flow-through portion; 341, flow accumulation groove; 342, first flow distribution groove; 343, second flow distribution groove; 4, oil inlet; 5, heat dissipation cavity; 6, flow-through groove; 7, casing; 71, positioning frame; 72, linkage assembly; 721, mounting frame; 722, linkage frame; 73, buffer gasket; 74, fastening screw; 8, oil passage; 9, positioning groove. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying Figures 1-4 The present application is further described in detail.

[0037] The embodiments of the present application disclose a stator core end inclined oil cooling heat dissipation structure. Referring to Figure 1 , Figure 2 and Figure 3 , the stator core end inclined oil cooling heat dissipation structure comprises a stator core 1, a stator winding 2 and a heat dissipation frame 3, the stator winding 2 is arranged in the stator core 1, and the heat dissipation frame 3 is provided with an oil inlet 4. The heat dissipation frame 3 is also provided with a heat dissipation cavity 5, and the heat dissipation frame 3 is also extended with a plurality of spraying places 31 on the side close to the stator winding 2. The end of each spraying place 31 is provided with an oil outlet hole 311, each oil outlet hole 311 is in communication with the heat dissipation cavity 5 and faces the stator winding 2, and each oil outlet hole 311 is provided with a resistance plate 32 on the side away from the oil inlet 4, and each resistance plate 32 is arranged in the heat dissipation cavity 5.

[0038] Referring to Figure 1 and Figure 2 , the stator core 1 is in a cylindrical shape, and the inner wall of the middle cavity of the stator core 1 is also provided with a groove for winding the stator winding 2, so that the stator winding is wound in the stator core 1. The length of the stator winding 2 along its own axis is greater than the length of the stator core 1, so that the two ends of the stator winding 2 extend out of the end of the stator core 1.

[0039] Referring to Figure 2 , the end of the stator core 1 close to the heat dissipation frame 3 is also extended with two mounting portions 11, and one end of each mounting portion 11 is integrally formed with the stator core 1. The two mounting portions 11 correspond to the two ends of the extension direction of the heat dissipation frame 3, and the other end of each mounting portion 11 penetrates through the end of the heat dissipation frame 3, so as to realize the positioning between the heat dissipation frame 3 and the stator core 1.

[0040] Referring to Figure 2 andFigure 3 The top of the heat dissipation frame 3 extends to an oil inlet portion 33 away from one end of the stator core 1, and the oil inlet 4 is arranged on the oil inlet portion 33 and communicates with a heat dissipation cavity 5 in the heat dissipation frame 3. The bottom wall in the heat dissipation cavity 5 is located directly below the oil inlet 4, and further extends a dispersion flow portion 34. The dispersion flow portion 34 is integrally formed with the heat dissipation frame 3, and the top of the dispersion flow portion 34 is protruding upward to form a protrusion, so that the cooling medium (i.e. cooling oil) introduced through the oil inlet 4 can flow to both ends of the heat dissipation cavity 5 when flowing to the protrusion of the dispersion flow portion 34.

[0041] Referring to Figure 2 and Figure 3 , the side of the dispersion flow portion 34 close to the oil inlet 4 is further provided with two flow accumulation grooves 341, and the two flow accumulation grooves 341 are respectively located on the opposite sides of the oil inlet 4 along the extension direction of the heat dissipation cavity 5. The top of the dispersion flow portion 34 is further provided with a first flow distribution groove 342 and a second flow distribution groove 343, and the number of the first flow distribution grooves 342 is several, and in the embodiment of the present application, the number of the first flow distribution grooves 342 is two.

[0042] Referring to Figure 2 and Figure 3 , the two first flow distribution grooves 342 are respectively located on the two sides of the dispersion flow portion 34 along the width direction of the heat dissipation cavity 5. The second flow distribution groove 343 is located between the two second flow distribution grooves 343. One end of the second flow distribution groove 343 and each first flow distribution groove 342 reaches the top of the other flow accumulation groove 341 from one end of the dispersion flow portion 34 via the top of the flow accumulation groove 341 and the protrusion of the dispersion flow portion 34, and finally reaches the other end of the dispersion flow portion 34, so that the second flow distribution groove 343 and the first flow distribution groove 342 can guide the cooling medium in the flow accumulation groove 341.

[0043] Referring to Figure 2 and Figure 3 , the intersection between the inner side wall on the two sides of the heat dissipation cavity 5 along the width direction thereof and the inner wall (i.e. the inner bottom wall) of the heat dissipation cavity 5 on which the oil outlet hole 311 is arranged, is provided with a flow passage groove 6, and each flow passage groove 6 extends along the extension direction of the heat dissipation cavity 5 to reach the two ends of the heat dissipation cavity 5. Each flow passage groove 6 communicates with the corresponding first flow distribution groove 342, so that the cooling medium in the flow accumulation groove 341 can quickly flow to the end of the heat dissipation cavity 5 along the flow passage groove 6 and the first flow distribution groove 342.

[0044] Referring to Figure 2 and Figure 3The two ends of the second flow distribution groove 343 extend close to the uppermost oil outlet hole 311, so that part of the cooling medium in the flow accumulation groove 341 flows to the vicinity of the uppermost oil outlet hole 311, thereby ensuring the cooling medium quality in the vicinity of the uppermost oil outlet hole 311.

[0045] With reference to Figure 2 and Figure 3 Each spray 31 extends obliquely towards the stator winding 2 and is offset from the vertical direction, so as to achieve oblique spraying of the stator winding 2.

[0046] With reference to Figure 2 and Figure 3 Each flow barrier 32 is integrally formed with the inner bottom wall of the heat dissipation cavity 5, so as to be connected and sufficiently hinder the flow of the cooling medium. The two ends of each flow barrier 32 along the width direction of the heat dissipation cavity 5 are offset towards the side close to the oil inlet 4, thereby improving the hindering effect. The two ends of each flow barrier 32 along the width direction of the heat dissipation cavity 5 are spaced apart from the corresponding inner side wall of the heat dissipation cavity 5 and close to the corresponding flow groove 6, so as to form a flow channel, thereby allowing the cooling medium in the corresponding flow groove 6 to flow into the space formed by the flow barrier 32 and the inner bottom wall of the heat dissipation cavity 5 after overflowing and flow out from the corresponding oil outlet hole 311.

[0047] With reference to Figure 1 and Figure 2 The stator core 1 is further provided with a machine shell 7, and the machine shell 7 is sleeved outside the stator core 1. The machine shell 7 is further provided with an oil passage 8 at one end along the axis direction of the machine shell 7, and one end of the oil inlet part 33 extends into the oil passage 8, so as to achieve the flow of the cooling medium. The machine shell 7 is further provided with a positioning frame 71 and a linkage assembly 72, and the linkage assembly 72 includes a mounting frame 721 and a linkage frame 722.

[0048] With reference to Figure 1 , Figure 2 and Figure 4 The mounting frame 721 is located on the side of the heat dissipation frame 3 away from the stator core 1, and one end of the mounting frame 721 is embedded in the inner wall of the machine shell 7 and is in sliding connection with the machine shell 7, and the sliding direction is the axis direction of the machine shell 7. The side of the mounting frame 721 away from the heat dissipation frame 3 is arranged close to the inner side wall of the machine shell 7, and the side of the mounting frame 721 close to the heat dissipation frame 3 is further embedded with a buffer gasket 73. In the embodiment of the present application, the area of the buffer gasket 73 is slightly larger than the area of the heat dissipation frame 3.

[0049] With reference to Figure 1 , Figure 2 and Figure 4The side of the buffer gasket 73 is arranged in contact with the heat dissipation frame 3. In the embodiment of the present application, the buffer gasket 73 is made of rubber material to sufficiently buffer and damp the heat dissipation frame 3. The buffer gasket 73 and the mounting frame 721 are both provided with holes through which the mounting portion 11 passes, so that the mounting portion 11 enters the inner wall of the casing 7 after passing through the heat dissipation frame 3, the buffer gasket 73 and the mounting frame 721.

[0050] Referring to Figure 1 , Figure 2 and Figure 4 , the casing 7 is further provided with fastening screws 74. In the embodiment of the present application, the number of fastening screws 74 is two, and each of the fastening screws 74 is arranged in one-to-one correspondence with the mounting portion 11. Each fastening screw 74 extends from the end of the casing 7 outside to the casing 7 inside and finally reaches the corresponding mounting portion 11, and is in threaded connection with the mounting portion 11 to fix the stator core 1, the heat dissipation frame 3, the buffer gasket 73 and the mounting frame 721.

[0051] Referring to Figure 1 and Figure 2 , in the embodiment of the present application, the number of linkage frames 722 is two, and the two linkage frames 722 are respectively located on the opposite sides of the positioning frame 71. One end of each linkage frame 722 is rotatably connected with the part of the mounting frame 721 extending into the inner wall of the casing 7 through a pin shaft, and the other end is rotatably connected with the positioning frame 71 through a pin shaft. The positioning frame 71 is located in the inner wall of the casing 7 and is in sliding connection with the inner wall of the casing 7, and the sliding direction is perpendicular to the axis direction of the casing 7.

[0052] Referring to Figure 1 and Figure 2 , the sliding path of the positioning frame 71 extends into the cavity in the casing 7, so that the stator core 1 can be located on the sliding path of the positioning frame 71. The outer side wall of the stator core 1 is further provided with a positioning groove 9 in which the positioning frame 71 is embedded.

[0053] Referring to Figure 1 , Figure 2 and Figure 4 , after the buffer gasket 73 is embedded on the mounting frame 721, the hole on the heat dissipation frame 3 is aligned with the mounting portion 11 of the stator core 1 on which the stator winding 2 is wound, so that the heat dissipation frame 3 is combined with the stator core 1. Then, the heat dissipation frame 3 and the stator core 1 are embedded in the casing 7 together, the mounting portion 11 on the stator core 1 is inserted into the corresponding hole, and the mounting frame 721 abuts against the inner side wall of the casing 7.

[0054] Referring to Figure 1 and Figure 2In the process, the mounting frame 721 slips, so that the mounting frame 721 drives the linkage frame 722 to displace, and then the linkage frame 722 is away from one end of the mounting frame 721, drives the positioning frame 71 to slip, so that the end of the positioning frame 71 is gradually inserted into the positioning groove 9 on the stator core 1, and the stator core 1 is repositioned, and the stator core 1 is prevented from completely separating from the shell 7. Thereafter, the shell 7 and the mounting portion 11 are fixed by the fastening screw 74, and the installation is realized.

[0055] The implementation principle of the stator core end inclined spray type oil cooling heat dissipation structure in the embodiment of the application is as follows: when the oil inlet 4 is connected to the cooling medium (i.e. cooling oil), the cooling medium falls to the top of the dispersion flow passage 34 and flows into the two flow accumulation grooves 341. Then the cooling medium flows to the direction close to the oil outlet hole 311 through the first flow distribution groove 342 and the second flow distribution groove 343. The cooling medium in the second flow distribution groove 343 flows to the vicinity of the uppermost oil outlet hole 311, and the cooling medium in the first flow distribution groove 342 flows into the corresponding flow passage 6, so as to flow close to each oil outlet hole 311 through the flow passage 6, and under the obstruction of the flow resistance plate 32, the amount of the cooling medium flowing out of each oil outlet hole 311 is ensured, and then the spray uniformity of the oil outlet hole 311 is ensured.

[0056] The embodiment of the application further provides an electric machine. Referring to Figure 1 and Figure 2 The electric machine comprises the shell 7 and the above-mentioned stator core end inclined spray type oil cooling heat dissipation structure, and the stator core 1 in the stator core end inclined spray type oil cooling heat dissipation structure is fixedly connected with the shell 7 through the fastening screw 74, so as to realize the fixation between the stator core 1 and the shell 7. In the embodiment of the application, the stator core 1 in the stator core end inclined spray type oil cooling heat dissipation structure is further fixed with the shell 7 through a plurality of screws away from one end of the heat dissipation frame 3, so as to increase the stability.

[0057] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A stator core end inclined spray type oil cooling heat dissipation structure, comprising a stator core (1), a stator winding (2) and a heat dissipation frame (3), wherein the stator winding (2) is disposed inside the stator core (1), and the heat dissipation frame (3) is provided with an oil inlet (4), characterized in that: The heat sink (3) is also provided with a heat sink cavity (5). The heat sink (3) extends a number of spray points (31) on the side near the stator winding (2). Each spray point (31) has an oil outlet (311) at its end. Each oil outlet (311) is connected to the heat sink cavity (5) and faces the stator winding (2). Each oil outlet (311) is provided with a baffle plate (32) on the side away from the oil inlet (4). Each baffle plate (32) is provided in the heat sink cavity (5). The inner walls of the heat dissipation cavity (5) on both sides along its width direction and the inner wall of the heat dissipation cavity (5) where the oil outlet (311) is provided are provided with flow grooves (6) to allow the cooling medium to flow quickly. A dispersion flow section (34) extends from the inner bottom wall of the heat dissipation cavity (5). The dispersion flow section (34) is located directly below the oil inlet (4) and extends towards the oil inlet (4) to form a protrusion. Two flow accumulation grooves (341) are also provided on the side of the dispersion flow section (34) near the oil inlet (4). The two flow accumulation grooves (341) are located on opposite sides of the oil inlet (4). The top of the dispersion flow section (34) is also provided with a first flow divider (342) and a second flow divider (343). The number of the first flow dividers (342) is set to several. The several first flow dividers (342) are respectively located on both sides of the dispersion flow section (34) along the width direction of the heat dissipation cavity (5), and both ends are connected to the corresponding flow groove (6). The second flow divider (343) is located between the several first flow dividers (342), and both ends are extended towards the side close to the oil outlet (311).

2. The stator core end inclined spray oil cooling structure according to claim 1, characterized in that: The stator core (1) is installed inside the housing (7). The housing (7) is also provided with an oil inlet (8), which is connected to the oil inlet (4). A buffer pad (73) is also provided inside the housing (7). The buffer pad (73) is located on the side of the heat sink (3) away from the stator core (1). A fastening screw (74) is also provided on the housing (7). One end of the fastening screw (74) passes through the buffer pad (73) and the heat sink (3) and reaches the stator core (1).

3. The stator core end inclined spray oil cooling structure according to claim 2, characterized in that: The housing (7) is also provided with a positioning frame (71). The positioning frame (71) is located inside the housing (7) and is slidably connected to the housing (7). The outer side wall of the stator core (1) is provided with a positioning groove (9) for the positioning frame (71) to be embedded. The housing (7) is also provided with a linkage component (72). The linkage component (72) is used to drive the positioning frame (71) to slide when the stator core (1) reaches the designated position, so that the positioning frame (71) is embedded in the positioning groove (9).

4. The stator core end inclined spray oil cooling structure according to claim 3, characterized in that: The linkage component (72) includes a mounting frame (721) and a linkage bracket (722). The buffer pad (73) is embedded in the mounting frame (721). The mounting frame (721) is slidably connected to the housing (7). One end of the linkage bracket (722) is rotatably connected to the mounting frame (721), and the other end is slidably connected to the positioning bracket (71).

5. The stator core end inclined spray oil cooling structure according to claim 1, characterized in that: Each of the flow-blocking plates (32) has a gap between its two ends along the width direction of the heat dissipation cavity (5) and the inner wall of the corresponding end along its own width direction, so as to form a channel for the cooling medium to flow in the heat dissipation cavity (5).

6. The stator core end inclined spray oil cooling structure according to claim 1, characterized in that: Each of the flow baffles (32) is connected to the inner wall of the heat dissipation cavity (5) where the oil outlet (311) is provided. Both ends of each flow baffle (32) along the width direction of the heat dissipation cavity (5) are offset towards the side closer to the oil inlet (4).

7. An electric motor, characterized in that: Including the stator core end inclined spray oil cooling heat dissipation structure as described in any one of claims 1-6.

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