Detachable heat dissipation structure for high-power motor

Abstract

The invention discloses a detachable heat dissipation structure for a high-power motor, which is applied to the field of motor heat dissipation, and is characterized in that air passages which are connected in parallel inside and outside are arranged on the motor, so that forced convection is synchronously carried out inside and outside the motor, and the heat dissipation effect is effectively improved; meanwhile, a heat transporting assembly is further arranged in the external air channel, on one hand, the heat transporting assembly can serve as a heat conduction channel when making contact with the heat dissipation fins, under the action of cooling water, a large temperature difference exists between a heat transporting strip and the heat dissipation fins, the heat dissipation speed is remarkably increased, on the other hand, the heat transporting assembly can be controlled to be separated from the heat dissipation fins at set intervals, and the heat dissipation efficiency is improved. The heat transfer strips are arranged on the water cooling bag, so that the heat transfer strips can directly carry heat to be separated from the motor body after absorbing heat and are fully in wrapping type contact with the water cooling bag, loss of heat on the water cooling bag is greatly accelerated, and compared with the prior art, the heat transfer strips greatly improve heat dissipation efficiency along with cyclic change of contact-separation-contact between the heat transfer strips and the water cooling bag. And the high requirement of a high-power motor on heat dissipation is met.

Description

Technical Field

[0001] This invention relates to the field of motor heat dissipation, and in particular to a detachable heat dissipation structure for high-power motors. Background Technology

[0002] With the rapid development of industrial automation and high-power equipment, high-power motors, as core power devices, are widely used in various high-efficiency, high-load fields, such as power, mining, metallurgy, shipbuilding, and rail transportation. High-power motors generate a large amount of heat during operation, especially under high loads. Excessive temperature not only leads to decreased motor efficiency but can also cause motor damage or premature aging, seriously affecting the stability and lifespan of equipment. Therefore, efficient heat dissipation and maintaining stable motor temperature are crucial for improving motor performance and extending its service life.

[0003] Existing methods for motor cooling mainly involve external fans at the rear, using forced convection to accelerate heat dissipation. Examples include a high-power permanent magnet DC motor with high heat dissipation disclosed in Chinese patent application CN106849583A and a flow-guiding fan for cooling a high-power permanent magnet synchronous motor disclosed in Chinese patent CN208870821U. However, the fan's direct action is mainly on the outer surface of the motor. For high-power motors, the heat generated during operation is very high, and most of the heat comes from inside the motor. Relying solely on external convection for heat dissipation has limited effectiveness and is difficult to meet the high heat dissipation requirements of high-power motors. Summary of the Invention

[0004] The core of this invention lies in setting up parallel internal and external air ducts on the motor to achieve synchronous forced convection between the inside and outside of the motor, thus solving the problem of limited heat dissipation effect caused by convection cooling only on the outside of the motor in existing technologies. Simultaneously, heat transfer components are also installed in the external air ducts, working in conjunction with water cooling to significantly improve heat dissipation efficiency and meet the high heat dissipation requirements of high-power motors.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A detachable heat dissipation structure for a high-power motor includes a fixed outer shell and an end ring fixedly connected to the outer axial end of the motor body, and an open shell and a filler shell fixedly connected between the outer ends of the fixed outer shell and the end ring by multiple bolts. Two symmetrical feet are fixedly connected to the bottom of the motor body, and the two feet pass through the connection between the open shell and the filler shell respectively. Two isolation ring plates and multiple heat dissipation fins arranged in a ring array are also fixedly connected to the outer axial end of the motor body. The multiple heat dissipation fins are fixedly connected through the two isolation ring plates. Multiple external guide holes are drilled on the isolation ring plates, which are respectively staggered with the multiple heat dissipation fins. The two isolation ring plates are close to the fixed outer shell and the end ring respectively, and the isolation ring plates, the fixed outer shell and the open shell form a uniform air space. The end ring, the open shell and the other isolation ring plate form a concentrating air space. An air inlet and an exhaust port are fixedly connected to the upper left and right ends of the open shell respectively, and the air inlet and the exhaust port communicate with the uniform air space and the concentrating air space respectively.

[0007] The outer end of the motor body shell has multiple internal inlet holes and multiple internal outlet holes. The internal inlet holes are connected to the gas equalization space, and the internal outlet holes are connected to the gas gathering space. The outer ends of the opening shell and the filling shell are also fixedly connected to heat transfer components, and the two heat transfer components form a ring.

[0008] Furthermore, the open shell and the patch shell are assembled into a complete annular sleeve, and grooves are chiseled on the edges of the two adjacent parts. The two opposite grooves form a rectangular opening, which matches the foot. Multiple flow ports are also chiseled on the foot.

[0009] Furthermore, the open shell does not contact the heat dissipation fins, while both isolation rings contact the open shell and the filler shell, and the two isolation rings and the open shell form a heat dissipation space.

[0010] Furthermore, the heat transfer component includes an outer cover connected to the open shell or the fixed shell, an electromagnetic plate fixedly connected to the outer end of the outer cover, a water-cooling bladder fixedly connected to the inner wall of the outer cover, and multiple heat transfer strips fixedly connected to the water-cooling bladder. The heat transfer strips movably penetrate the open shell or the fixed shell, and the multiple heat transfer strips correspond to multiple heat dissipation fins respectively. The outer end of the outer cover is fixedly connected to a cooling water inlet and a cooling water outlet, both of which communicate with the water-cooling bladder.

[0011] Furthermore, the length of the heat transfer strip is exactly the distance between the two isolation rings. The heat transfer strip is made of ferromagnetic material, and the heat dissipation fins are made of magnetic material. Both the heat dissipation fins and the electromagnetic plate after being energized generate magnetic attraction to the heat transfer strip, and the magnetic attraction generated by the electromagnetic plate is greater than the magnetic attraction generated by the heat dissipation fins.

[0012] Furthermore, the water-cooling bladder has an elastic sealing structure, and the radial width of the heat transfer strip is smaller than the distance between the heat dissipation fins and the inside of the outer cover, but larger than the distance between the open shell and the inner wall of the outer cover.

[0013] Furthermore, multiple return holes are drilled at the ends of the open shell and the filling shell near the two isolation ring plates. The multiple return holes are distributed at intervals with the multiple heat dissipation fins. A one-way valve assembly is installed in each of the multiple return holes. The air inlet end of the return hole near the exhaust port faces the side closer to the motor body, and the air inlet end of the return hole near the inlet port faces the side farther away from the motor body.

[0014] Compared with the prior art, the advantages of this invention are:

[0015] (1) This solution achieves forced convection between the inside and outside of the motor by setting up parallel air passages on the motor, thereby solving the problem that the heat dissipation effect is limited in the prior art, which only performs convection heat dissipation on the outside of the motor.

[0016] (2) A heat transfer component is also provided in the external air duct. Water cooling auxiliary heat dissipation can be added when the motor body is isolated from the cooling water. On the one hand, when the heat transfer component is in contact with the heat dissipation fins, it can act as a heat conduction channel. Under the action of the cooling water, there is a large temperature difference between the heat transfer strip and the heat dissipation fins, which significantly accelerates the heat dissipation speed. On the other hand, every once in a while, the heat transfer component can be controlled to separate from the heat dissipation fins, so that after absorbing heat, it can directly carry the heat away from the motor body and fully make a wrapping contact with the water cooling bag, which greatly accelerates the heat dissipation on it. With the cyclical change of contact-separation-contact between the heat transfer strip and the heat dissipation fins, the heat dissipation efficiency is greatly improved compared with the existing technology, so as to meet the high heat dissipation requirements of high power motors.

[0017] (3) A return air passage is also provided, which can complete the recooling of some of the low-temperature gas that has absorbed heat inside the heat dissipation structure, thereby effectively improving the utilization rate of the cooling medium (cooling water in the water-cooled bag) and shortening the circulation path of the low-temperature gas, thereby effectively reducing the cost of cooling the motor when it is working. Attached Figure Description

[0018] Figure 1 This is a perspective view of a high-power motor with a detachable heat dissipation structure installed, according to the present invention.

[0019] Figure 2 This is a perspective view of the high-power motor of the present invention with the opening shell and the patch shell removed;

[0020] Figure 3 This is a perspective view of the high-power motor of the present invention with the heat sink housing removed from another angle;

[0021] Figure 4 This is a perspective view of the annular sleeve of the present invention;

[0022] Figure 5 A perspective view of the annular sleeve of the present invention in a separated state;

[0023] Figure 6 This is a cross-sectional schematic diagram of the internal and external parallel heat dissipation air channels of the present invention;

[0024] Figure 7 This is a schematic diagram of the radial cross-section of the present invention when the heat transfer component is installed;

[0025] Figure 8 This is a partial schematic diagram of the transverse cross-section of the present invention when the heat transfer component is installed;

[0026] Figure 9 This is a schematic diagram of the present invention with the heat transfer component installed and a return air passage formed;

[0027] Figure 10 This is a schematic diagram of the radial cross-section when the heat transfer strip and the heat dissipation fins of the present invention are separated;

[0028] Figure 11 for Figure 10 A schematic diagram of point A in the middle.

[0029] Explanation of the labels in the diagram:

[0030] 1 Motor body, 101 Foot, 102 Flow port, 21 Fixed outer shell, 22 Open shell, 23 Filler shell, 24 Isolation ring, 25 Heat dissipation fins, 201 End ring, 202 Rectangular opening, 31 Air inlet, 32 Exhaust port, 401 Inner inlet hole, 402 Inner outlet hole, 403 Outer guide hole, 404 Return hole, 51 Outer cover, 52 Electromagnetic plate, 53 Heat transfer strip, 54 Water cooling bag, 501 Cooling water inlet, 502 Cooling water outlet. Detailed Implementation

[0031] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0032] First implementation method:

[0033] Figures 1-3 The diagram illustrates a detachable heat dissipation structure for a high-power motor, comprising a fixed outer shell 21 and an end ring 201 fixedly connected to the outer axial end of the motor body 1, and an open shell 22 and a patch shell 23 fixedly connected between the outer ends of the fixed outer shell 21 and the end ring 201 by multiple bolts, allowing the open shell 22 and the patch shell 23 to be detachable as a whole. Two symmetrically arranged feet 101 are fixedly connected to the bottom of the motor body 1. Figures 4-5Two feet 101 pass through the connection between the open shell 22 and the patch shell 23 respectively. The open shell 22 and the patch shell 23 are assembled into a complete annular sleeve, and grooves are carved on the edges of the two adjacent parts. The two opposite grooves form a rectangular opening 202, which matches the feet 101. Multiple flow ports 102 are also carved on the feet 101. Through the setting of the flow ports 102, the two sides of the feet 101 are connected. When low-temperature gas is introduced into the gas equalization space through the air inlet 31, the low-temperature gas can spread smoothly to the patch shell 23, so that the spread process is not easily hindered. This effectively ensures that the heat dissipation rate of the upper and lower parts of the motor tends to be consistent and is not prone to excessive changes.

[0034] It is worth noting that, in order to facilitate the disassembly and assembly of this heat dissipation structure, the opening shell 22 is made of hard thermally conductive silicone, which gives it a relatively small elasticity, allowing the opening shell 22 to expand outward along the opening and undergo a certain deformation, thus facilitating its disassembly and assembly outside the motor body 1.

[0035] like Figures 2-3 Two isolation ring plates 24 and multiple heat dissipation fins 25 arranged in a ring array are fixedly connected to the outer end of the motor body 1. The multiple heat dissipation fins 25 are fixedly connected through the two isolation ring plates 24. Multiple external guide holes 403 are drilled on the isolation ring plates 24 and are respectively distributed in an alternating manner with the multiple heat dissipation fins 25. The two isolation ring plates 24 are close to the fixed outer shell 21 and the end ring 201 respectively. The isolation ring plates 24, the fixed outer shell 21 and the open shell 22 form a uniform air space. The end ring 201, the open shell 22 and the other isolation ring plate 24 form a gas gathering space. The upper left and right ends of the open shell 22 are fixedly connected to the air inlet 31 and the exhaust port 32 respectively. The air inlet 31 and the exhaust port 32 are respectively connected to the uniform air space and the gas gathering space.

[0036] The opening shell 22 does not contact the heat dissipation fins 25, while both isolation rings 24 contact both the opening shell 22 and the filler shell 23, forming a heat dissipation space between the two isolation rings 24 and the opening shell 22. Figure 6 The low-temperature gas enters the heat dissipation space through multiple external guide holes 403, and can quickly diffuse in the space. It then enters the gas gathering space through multiple external guide holes 403 on the isolation ring plate 24 on the other side, and is then discharged through the exhaust port 32. This is the heat dissipation air passage outside the motor body 1.

[0037] The outer axial end of the motor body 1 has multiple internal inlet holes 401 and multiple internal outlet holes 402. The multiple internal inlet holes 401 communicate with the air equalization space, and the multiple internal outlet holes 402 communicate with the air gathering space. Figure 6When low-temperature gas is injected into the gas equalization space through the air inlet 31, a portion of the gas can seep into the motor body 1 through the inner inlet hole 401, and then flow in the gaps between the components inside the motor body 1, and then reach the other side, and finally enter the gas gathering space along the multiple inner outlet holes 402, thus forming a heat dissipation channel inside the motor body 1.

[0038] like Figure 6 In use, the external heat dissipation air passage is formed by the combination of 301-air equalization space-multiple external guide holes 403-heat dissipation space-multiple external guide holes 403-air gathering space-302 on the other side, and the internal heat dissipation air passage is formed by 301-air equalization space-inner inlet hole 401-motor body 1 internal space-inner outlet hole 402-air gathering space-302. The internal and external air passages are connected in parallel to achieve synchronous forced convection between the inside and outside of the motor. This solves the problem that the existing technology only performs convection heat dissipation on the outside of the motor, resulting in limited heat dissipation effect. Compared with the existing technology, it significantly speeds up the heat dissipation efficiency and meets the high heat dissipation requirements of high-power motors.

[0039] Second implementation method:

[0040] This embodiment adds a heat transport component to the first embodiment, while the rest remains the same as the first embodiment.

[0041] Figures 7-8 As shown, heat transfer components are also fixedly connected to the outer ends of the open shell 22 and the repair shell 23. The two heat transfer components form a ring. The heat transfer components include an outer cover 51 connected to the open shell 22 or the fixed shell 21, an electromagnetic plate 52 fixedly connected to the outer end of the outer cover 51, a water-cooling bladder 54 fixedly connected to the inner wall of the outer cover 51, and a plurality of heat transfer strips 53, each fixedly connected to the water-cooling bladder 54. The heat transfer strips 53 movably penetrate the open shell 22 or the fixed shell 21, and the plurality of heat transfer strips 53 respectively Corresponding to the multiple heat dissipation fins 25, the outer end of the outer cover 51 is fixedly connected to the cooling water inlet 501 and the cooling water outlet 502, which can circulate the cooling water in the water-cooled bag 54 and accelerate heat dissipation. Both are connected to the water-cooled bag 54. When the motor is working, the electromagnetic plate 52 can be alternately controlled to turn on and off, thereby continuously attracting the heat transfer strip 53 to move back and forth radially, and continuously contacting and separating from the heat dissipation fins 25, so that the heat transfer strip 53 can play the role of transporting heat on the motor body 1 and accelerating heat dissipation.

[0042] Specifically, when the electromagnetic plate 52 is de-energized, causing the heat transfer strip 53 to contact the heat dissipation fins 25, a significant temperature difference exists between the heat transfer strip 53 and the heat dissipation fins 25 due to the water-cooling bag 54. Upon contact, heat from inside the motor body 1 on the heat dissipation fins 25 is rapidly transferred to the heat transfer strip 53 and carried away by the cooling water flowing within the water-cooling bag 54. As the contact time increases, the temperature difference between the heat transfer strip 53 and the heat dissipation fins 25 decreases. At this point, the electromagnetic plate 52 can be energized, which... The heat transfer strip 53 generates a magnetic attraction force, which causes the heat transfer strip 53 with a higher temperature to move radially outward and separate from the heat dissipation fins 25. At this time, due to the elasticity of the water-cooling bag 54, the end of the heat transfer strip 53 is embedded into the water-cooling bag 54, so that the two are in a wrapping contact. This allows the cooling water in the water-cooling bag 54 to have sufficient heat exchange with the heat transfer strip 53, causing the temperature of the heat transfer strip 53 to drop rapidly. Then, the electromagnetic plate 52 is de-energized, causing the heat transfer strip 53 to reset and contact the heat dissipation fins 25, thus repeating the above heat conduction process to achieve rapid heat transfer.

[0043] The length of the heat transfer strip 53 is exactly the distance between the two isolation ring plates 24. The heat transfer strip 53 is made of ferromagnetic material, and the heat dissipation fins 25 are made of magnetic material. Both the heat dissipation fins 25 and the energized electromagnetic plate 52 generate magnetic attraction to the heat transfer strip 53. The magnetic attraction generated by the electromagnetic plate 52 is greater than that generated by the heat dissipation fins 25, so that the heat transfer strip 53 can move in different directions when the electromagnetic plate 52 is energized or de-energized, thereby realizing the above-mentioned radial reciprocating movement process.

[0044] The water-cooling bag 54 has an elastic sealing structure. The radial width of the heat transfer strip 53 is less than the distance between the heat dissipation fins 25 and the inside of the outer cover 51 and greater than the distance between the open shell 22 and the inner wall of the outer cover 51. This effectively ensures that when the heat transfer strip 53 separates from the heat dissipation fins 25, its end will not detach from the open shell 22 or the patch shell 23. This restricts and guides its radial movement path, allowing it to reciprocate smoothly and preventing positional deviation from the heat dissipation fins 25.

[0045] Compared to the first embodiment, this embodiment also includes a heat transfer component in the external air duct. This allows for water-cooled auxiliary heat dissipation even when the motor body 1 is isolated from cooling water. On one hand, when the heat transfer component contacts the heat dissipation fins 25, it acts as a heat conduction channel. Under the action of cooling water, a large temperature difference exists between the heat transfer strip 53 and the heat dissipation fins 25, significantly accelerating the heat dissipation speed. On the other hand, the heat transfer component can be controlled to separate from the heat dissipation fins 25 at regular intervals, allowing it to directly carry away the heat after absorbing it and fully engage with the water-cooling bag 54 in a wrapping manner, greatly accelerating the dissipation of heat. With the cyclical change of contact-separation-contact between the heat transfer strip 53 and the heat dissipation fins 25, the heat dissipation efficiency is significantly improved compared to the prior art, thus meeting the high heat dissipation requirements of high-power motors.

[0046] The third implementation method:

[0047] This embodiment adds a reflux airway to the second embodiment, while the rest remains the same as the second embodiment.

[0048] like Figures 9-11 Multiple return holes 404 are drilled at the ends of the open shell 22 and the repair shell 23 near the two isolation ring plates 24. These return holes 404 are spaced apart from the multiple heat dissipation fins 25. One-way valve assemblies are installed within each of the multiple return holes 404. The air inlet end of the return hole 404 near the coolant outlet 502 faces towards the side closer to the motor body 1, while the air inlet end of the return hole 404 near the coolant inlet 501 faces away from the motor body 1. This allows the low-temperature gas in the external air passage to move towards the gas-gathering space after absorbing heat. When this gas reaches the external guide hole 403, some of it will enter the outer casing 51 through the return holes 404. The gas comes into contact with the water-cooled bladder 54 for heat exchange, causing its temperature to drop. Then, it flows back through the entire outer cover 51 and moves to the side near the gas distribution space, returning to the heat dissipation space. It then acts on the outside of the multiple heat dissipation fins 25 again, thereby carrying away the heat from their surfaces. This gas return path is called the return air channel. With the above-mentioned return air channel, compared with the second embodiment, the internal part of this heat dissipation structure completes the recooling of the low-temperature gas that has already absorbed heat, thereby effectively improving the utilization rate of the cooling medium (cooling water in the water-cooled bladder 54) and shortening the circulation path of the low-temperature gas, thereby effectively reducing the cost of cooling the motor during operation.

[0049] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A detachable heat dissipation structure for a high-power motor, comprising a fixed outer shell (21), an end ring (201) fixedly connected to the outer axial end of a motor body (1), and an open shell (22) and a patch shell (23) fixedly connected between the outer ends of the fixed outer shell (21) and the end ring (201) by a plurality of bolts, wherein two mutually symmetrical foot (101) are fixedly connected to the bottom of the motor body (1), and the two foot (101) respectively penetrate the connection between the open shell (22) and the patch shell (23), characterized in that: The axial outer end of the motor body (1) is further fixedly connected with two isolation ring pieces (24) and a plurality of annularly arrayed heat dissipation fins (25), the plurality of heat dissipation fins (25) are fixedly penetrated through the two isolation ring pieces (24), the isolation ring pieces (24) are provided with a plurality of outer flow guide holes (403) which are respectively and alternately distributed with the plurality of heat dissipation fins (25), the two isolation ring pieces (24) are respectively close to the fixed housing (21) and the end ring (201), and the isolation ring piece (24), the fixed housing (21) and the open housing (22) enclose an equalizing space, the end ring (201), the open housing (22) and the other isolation ring piece (24) enclose a concentrating space, the left and right upper ends of the open housing (22) are respectively fixedly connected with an air inlet (31) and an air outlet (32), and the air inlet (31) and the air outlet (32) are respectively communicated with the equalizing space and the concentrating space; The axial outer end of the motor body (1) is further fixedly connected with two isolation ring pieces (24) and a plurality of annularly arrayed heat dissipation fins (25), the plurality of heat dissipation fins (25) are fixedly penetrated through the two isolation ring pieces (24), the isolation ring pieces (24) are provided with a plurality of outer flow guide holes (403) which are respectively and alternately distributed with the plurality of heat dissipation fins (25), the two isolation ring pieces (24) are respectively close to the fixed housing (21) and the end ring (201), and the isolation ring piece (24), the fixed housing (21) and the open housing (22) enclose an equalizing space, the end ring (201), the open housing (22) and the other isolation ring piece (24) enclose a concentrating space, the left and right upper ends of the open housing (22) are respectively fixedly connected with an air inlet (31) and an air outlet (32), and the air inlet (31) and the air outlet (32) are respectively communicated with the equalizing space and the concentrating space; 2. The detachable heat dissipation structure for high-power motor according to claim 1, characterized in that: The open housing (22) and the open housing (22) are combined into a complete annular sleeve, and the edges close to each other of the two are provided with grooves, and the two opposite grooves form a rectangular port (202), the rectangular port (202) is matched with the foot (101), and the foot (101) is further provided with a plurality of flow ports (102).

3. The detachable heat dissipation structure for high-power motor according to claim 1, characterized in that: The open housing (22) is not in contact with the heat dissipation fin (25), the two isolation ring pieces (24) are in contact with the open housing (22) and the open housing (23), and the two isolation ring pieces (24) and the open housing (22) enclose a heat dissipation space.

4. The detachable heat sink structure for high-power electric machines according to claim 1, characterized in that: The heat transfer assembly comprises an outer cover (51) connected with the open housing (22) or the fixed housing (21), an electromagnetic sheet (52) fixedly connected to the outer end of the outer cover (51), a water cooling bag (54) fixedly connected to the inner wall of the outer cover (51), and a plurality of heat transfer strips (53) fixedly connected with the water cooling bag (54), the heat transfer strip (53) is movably penetrated through the open housing (22) or the fixed housing (21), and the plurality of heat transfer strips (53) are respectively corresponding to the plurality of heat dissipation fins (25), the outer end of the outer cover (51) is fixedly connected with an inlet (501) and an outlet (502), and the two are communicated with the water cooling bag (54).

5. The detachable heat sink structure for high-power electric machines according to claim 3, characterized in that: The length of the heat transfer strip (53) is just the distance between the two isolation ring pieces (24), the heat transfer strip (53) is made of ferromagnetic material, the heat dissipation fin (25) is made of magnetic material, and the heat dissipation fin (25) and the electromagnetic sheet (52) after being electrified generate magnetic attraction to the heat transfer strip (53), and the magnetic attraction generated by the electromagnetic sheet (52) is greater than that generated by the heat dissipation fin (25).

6. The detachable heat sink structure for high-power electric machines according to claim 4, characterized in that: The water-cooled capsule (54) is an elastic sealing structure, and the radial width of the heat transfer strip (53) is smaller than the distance between the heat dissipation fins (25) and the inner part of the outer cover (51) and greater than the distance between the open shell (22) and the inner wall of the outer cover (51).

7. The detachable heat sink structure for high-power electric machines according to claim 6, characterized in that: The open shell (22) and the patch shell (23) are close to the end of the two isolation ring pieces (24) and are drilled with a plurality of backflow holes (404), and a plurality of backflow holes (404) are respectively and alternately distributed with a plurality of heat dissipation fins (25).

8. The detachable heat sink structure for high-power electric machines according to claim 7, characterized in that: A plurality of one-way valve assemblies are installed in the plurality of backflow holes (404), and the air inlet end of the backflow hole (404) close to the cooling water outlet (502) is close to the side of the motor body (1), and the air inlet end of the backflow hole (404) close to the cooling water inlet (501) is close to the side away from the motor body (1).

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