A heat dissipation structure for axial magnetic field motor windings

Abstract

This invention provides a heat dissipation structure for an axial magnetic field motor winding, including a heat dissipation assembly. The heat dissipation assembly includes a bottom cover, a stator winding frame, coils, heat-conducting plates, a heat-conducting coil, a columnar spiral water channel, a first outlet pipe, a first inlet pipe, and a second outlet pipe. This invention utilizes the close cooperation between the heat-conducting plates and the inner heat-conducting coil between adjacent coils to quickly conduct heat away from the coils. The bottom of the heat-conducting plate is connected to the bottom cover, and one end is connected to the heat-conducting coil, creating an efficient heat conduction path that allows heat to be rapidly transferred from the heating coil to the heat-conducting coil. Simultaneously, the columnar spiral water channel allows the coolant to fully contact the heat-conducting coil, efficiently removing heat. The disc-shaped spiral water channel increases the contact area between the coolant and the bottom cover, extending the contact time and improving heat dissipation efficiency. These two elements work together to achieve efficient heat dissipation from the motor windings. Furthermore, the heat dissipation fins on the lower surface of the bottom cover increase the heat dissipation area, assisting the overall heat dissipation system in reducing the motor temperature.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, and in particular to a heat dissipation structure for axial magnetic field motor windings. Background Technology

[0002] Axial magnetic field motors have been widely used in many fields such as new energy vehicles, aerospace, and industrial robots due to their unique structure and performance advantages. However, during motor operation, the windings generate a large amount of heat. If this heat cannot be dissipated in a timely and effective manner, the winding temperature will rise, the insulation performance will decrease, and consequently, the motor's efficiency, reliability, and service life will be affected.

[0003] Existing axial magnetic field motor windings typically employ natural air cooling or water cooling methods for heat dissipation. Natural air cooling has low heat dissipation efficiency and is difficult to meet the heat dissipation requirements of high power density motors. Traditional water cooling methods usually place the cooling water channels on the motor casing or in a location far from the windings, requiring heat to travel a long heat transfer path to reach the cooling medium, resulting in poor heat dissipation. Therefore, a heat dissipation structure for axial magnetic field motor windings is proposed. Utility Model Content

[0004] In view of this, the present invention aims to provide a heat dissipation structure for an axial magnetic field motor winding to solve or alleviate the technical problems existing in the prior art, or at least provide a beneficial alternative.

[0005] The technical solution of this utility model embodiment is implemented as follows: an axial magnetic field motor winding heat dissipation structure includes a heat dissipation component, which includes a bottom cover, a stator winding frame, a coil, a heat-conducting sheet, a heat-conducting ring, a columnar spiral water channel, a first water outlet pipe, a first water inlet pipe, a disc-type spiral water channel, a second water inlet pipe, and a second water outlet pipe.

[0006] The outer surface of the upper surface of the bottom cover is circumferentially provided with multiple stator winding skeletons. Coils are wound around the outer walls of each stator winding skeleton. A heat-conducting plate is provided between each pair of adjacent coils. The bottom of the heat-conducting plate is fixedly connected to the upper surface of the bottom cover. A heat-conducting ring is fixedly connected to the inner side of the upper surface of the bottom cover near the stator winding skeleton. One end of the heat-conducting plate is fixedly connected to the outer wall of the heat-conducting ring. A columnar spiral water channel is provided inside the heat-conducting ring. A first water outlet pipe and a first water inlet pipe are respectively provided on the upper and lower parts of the inner wall of the heat-conducting ring. The two ends of the columnar spiral water channel are respectively connected to the water outlet end of the first water inlet pipe and the water inlet end of the first water outlet pipe. A disc-shaped spiral water channel is provided inside the bottom cover. A second water inlet pipe and a second water outlet pipe are respectively provided on the outer and inner sides of the bottom of the bottom cover. The two ends of the disc-shaped spiral water channel are respectively connected to the water outlet end of the second water inlet pipe and the water inlet end of the second water outlet pipe.

[0007] More preferably, the bottom of the first water outlet pipe and the first water inlet pipe both penetrate through the upper surface of the bottom cover near the inner side of the heat conduction ring, the water inlet ends of the first water inlet pipe and the second water inlet pipe are connected to the main water inlet pipe, and the water outlet ends of the first water outlet pipe and the second water outlet pipe are connected to the main water outlet pipe.

[0008] More preferably, a first insulating layer is provided between the heat-conducting sheet and the coil, and a second insulating layer is provided between the heat-conducting coil and the coil.

[0009] More preferably, the lower surface of the bottom cover has multiple heat dissipation fins arranged in a circular pattern on its outer side.

[0010] More preferably, a first mounting hole is provided at the center of the lower surface of the bottom cover, and an output shaft is rotatably connected to the inner sidewall of the first mounting hole via a first bearing. A rotor is fixedly connected to the outer sidewall of the output shaft near the upper part of the stator winding frame.

[0011] More preferably, the outer wall of the bottom cover is fixedly connected to the housing, and a second mounting hole is provided at the center of the upper surface of the housing. The inner wall of the second mounting hole is rotatably connected to the upper part of the outer wall of the output shaft through a second bearing.

[0012] More preferably, the lower surface of the rotor has a plurality of permanent magnets arranged in a circular pattern on the outer side.

[0013] More preferably, a third insulating layer is provided between the bottom cover and the stator winding frame.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] This invention utilizes the close cooperation between the heat-conducting plates between adjacent coils and the inner heat-conducting ring to quickly conduct the heat generated by the coils away. The bottom of the heat-conducting plate is connected to the bottom cover, and one end is connected to the heat-conducting ring, creating an efficient heat conduction path that allows heat to be quickly transferred from the heating coil to the heat-conducting ring. At the same time, the columnar spiral water channel allows the coolant to fully contact the heat-conducting ring, efficiently removing heat. The disc-shaped spiral water channel increases the contact area between the coolant and the bottom cover, prolonging the contact time and improving heat dissipation efficiency. The two work together to achieve efficient heat dissipation from the motor windings. In addition, the heat dissipation fins on the lower surface of the bottom cover increase the heat dissipation area, assisting the overall heat dissipation system in reducing the motor temperature.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural view of the present invention from one perspective;

[0019] Figure 2 This is another structural view of the present invention;

[0020] Figure 3 This is a structural diagram of the heat-conducting coil and rotor of this utility model;

[0021] Figure 4 This is a partial cross-sectional view of the bottom cover and heat-conducting ring of this utility model.

[0022] Reference numerals: 1. Heat dissipation assembly; 11. Bottom cover; 12. Stator winding frame; 13. Coil; 14. Heat-conducting plate; 15. Heat-conducting coil; 16. Columnar spiral water channel; 17. First water outlet pipe; 18. First water inlet pipe; 19. Disc-type spiral water channel; 20. Second water inlet pipe; 21. Second water outlet pipe; 22. Main water inlet pipe; 23. Main water outlet pipe; 24. First insulation layer; 25. Second insulation layer; 26. Heat dissipation fins; 27. First mounting hole; 28. First bearing; 29. ​​Output shaft; 30. Rotor; 31. Housing; 32. Second mounting hole; 33. Second bearing; 34. Permanent magnet; 35. Third insulation layer. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-4 As shown, this utility model embodiment provides a heat dissipation structure for an axial magnetic field motor winding, including a heat dissipation component 1. The heat dissipation component 1 includes a bottom cover 11, a stator winding frame 12, a coil 13, a heat-conducting sheet 14, a heat-conducting coil 15, a columnar spiral water channel 16, a first water outlet pipe 17, a first water inlet pipe 18, a disc-shaped spiral water channel 19, a second water inlet pipe 20, and a second water outlet pipe 21.

[0026] Multiple stator winding frames 12 are arranged circumferentially on the outer side of the upper surface of the bottom cover 11. Coils 13 are wound around the outer walls of each stator winding frame 12. A heat-conducting plate 14 is disposed between adjacent coils 13. The bottom of the heat-conducting plate 14 is fixedly connected to the upper surface of the bottom cover 11. A heat-conducting ring 15 is fixedly connected to the inner side of the upper surface of the bottom cover 11 near the stator winding frames 12. One end of the heat-conducting plate 14 is fixedly connected to the outer wall of the heat-conducting ring 15. A columnar spiral water channel 16 is disposed inside the heat-conducting ring 15. A first water outlet pipe 17 and a first water inlet pipe 18 are respectively disposed on the upper and lower parts of the inner wall of the heat-conducting ring 15. The two ends of the coil are respectively connected to the outlet end of the first water inlet pipe 18 and the inlet end of the first water outlet pipe 17. The bottom cover 11 is provided with a disc-shaped spiral water channel 19. The bottom outer and inner sides of the bottom cover 11 are respectively provided with a second water inlet pipe 20 and a second water outlet pipe 21. The two ends of the disc-shaped spiral water channel 19 are respectively connected to the outlet end of the second water inlet pipe 20 and the inlet end of the second water outlet pipe 21. By placing the heat-conducting plate 14 between adjacent coils 13 and in contact with the coils 13, it is easy to absorb the heat generated by the coils 13. The outer wall of the heat-conducting ring 15 is in contact with the inner ring formed by multiple coils 13, which is also easy to absorb the heat generated by the coils 13.

[0027] In one embodiment, specifically: the bottom of the first water outlet pipe 17 and the first water inlet pipe 18 both penetrate through the upper surface of the bottom cover 11 near the inner side of the heat conduction ring 15. The water inlet ends of the first water inlet pipe 18 and the second water inlet pipe 20 are connected to the water inlet main pipe 22, and the water outlet ends of the first water outlet pipe 17 and the second water outlet pipe 21 are connected to the water outlet main pipe 23. The water inlet main pipe 22 facilitates the centralized supply of coolant, and the water outlet main pipe 23 facilitates the unified collection of coolant after heat dissipation.

[0028] In one embodiment, specifically: a first insulating layer 24 is provided between the heat-conducting sheet 14 and the coil 13, and a second insulating layer 25 is provided between the heat-conducting coil 15 and the coil 13. The first insulating layer 24 and the second insulating layer 25 can effectively block current and prevent current from being conducted to the heat-conducting components, avoiding the risk of electric shock to operators and ensuring the safety of motor use. At the same time, the first insulating layer 24 and the second insulating layer 25 are both made of high-temperature resistant and insulating materials, such as polyimide film and mica sheets, which can ensure good insulation performance while also ensuring that the heat generated by the coil 13 is effectively transferred to the heat-conducting sheet 14 and the heat-conducting coil 15.

[0029] In one embodiment, specifically: multiple heat dissipation fins 26 are arranged circumferentially on the outer side of the lower surface of the bottom cover 11, thereby increasing the heat dissipation area of ​​the bottom cover 11 and improving the heat dissipation effect.

[0030] In one embodiment, specifically: a first mounting hole 27 is provided at the center of the lower surface of the bottom cover 11. The inner sidewall of the first mounting hole 27 is rotatably connected to the output shaft 29 via a first bearing 28. The outer sidewall of the output shaft 29 is fixedly connected to the upper part of the stator winding frame 12. The first mounting hole 27 at the center of the lower surface of the bottom cover 11 and the first bearing 28 rotatably connected to the output shaft 29 provide a stable support point for the output shaft 29. When the motor is running, the first bearing 28 can effectively reduce the frictional resistance when the output shaft 29 rotates, so that the output shaft 29 can rotate smoothly around its own axis. This not only ensures the stability of the rotor 30 during rotation, but also reduces mechanical wear and extends the service life of the motor.

[0031] In one embodiment, specifically: the outer wall of the bottom cover 11 is fixedly connected to the housing 31, and a second mounting hole 32 is provided at the center of the upper surface of the housing 31. The inner wall of the second mounting hole 32 is rotatably connected to the upper part of the outer wall of the output shaft 29 through a second bearing 33. The housing 31 is connected to the output shaft 29 through the second bearing 33 in the second mounting hole 32, and works in cooperation with the first bearing 28 in the first mounting hole 27 on the bottom cover 11 to provide a stable support structure for the output shaft 29. When the motor is running, it can effectively limit the radial and axial displacement of the output shaft 29, keep the rotor 30 and the output shaft 29 at a precise rotation center, reduce vibration and wear, ensure smooth operation of the motor, and extend the service life of the motor.

[0032] In one embodiment, specifically: a plurality of permanent magnets 34 are arranged in a circular pattern on the outer side of the lower surface of the rotor 30. The circularly distributed permanent magnets 34 can ensure that the electromagnetic force on the rotor 30 is uniform, making the rotation of the rotor 30 more stable and reducing vibration and noise.

[0033] In one embodiment, specifically: a third insulating layer 35 is provided between the bottom cover 11 and the stator winding frame 12. The third insulating layer 35 can effectively prevent current from being conducted from the stator winding frame 12 to the bottom cover 11, avoid short circuit faults, and ensure the safety of motor operation. At the same time, the third insulating layer 35 is also made of high temperature resistant and good insulation materials, such as polyimide film, mica sheet, etc., which can ensure good insulation performance while also ensuring that the heat generated by the coil 13 is effectively transferred to the bottom cover 11.

[0034] In operation, current flows through the coil 13 wound around the outer wall of the stator winding frame 12, generating a magnetic field. Multiple permanent magnets 34 arranged on the outer circumference of the lower surface of the rotor 30 are driven by electromagnetic force under the influence of the magnetic field generated by the stator coil 13. The output shaft 29 is supported by the first bearing 28 in the first mounting hole 27 at the center of the lower surface of the bottom cover 11 and the second bearing 33 in the second mounting hole 32 at the center of the upper surface of the housing 31, allowing the rotor 30 to rotate stably around the output shaft 29, thereby driving the output shaft 29. Synchronous rotation enables the motor to output mechanical energy. During operation, coil 13 generates a large amount of heat. The heat-conducting plates 14 between adjacent coils 13 rapidly conduct this heat to the heat-conducting ring 15. This is because the bottom of the heat-conducting plate 14 is fixed to the upper surface of the bottom cover 11, and one end is connected to the outer wall of the heat-conducting ring 15, forming an efficient heat conduction path that allows heat to be quickly transferred from the heat source coil 13. Inside the heat-conducting ring 15, in the columnar spiral water channel 16, coolant flows in from the first inlet pipe 18. Due to the unique spiral structure of the columnar spiral water channel 16, cooling... During its flow, the coolant can fully contact the heat-conducting coil 15, carrying away the heat transferred from the heat-conducting plate 14, and then flows out from the first outlet pipe 17, completing the heat dissipation cycle in this area. Inside the bottom cover 11, in the disc-shaped spiral water channel 19, the coolant flows in from the second inlet pipe 20, flows through the disc-shaped spiral water channel, exchanges heat with the bottom cover 11, absorbs heat from the bottom cover 11, and then flows out from the second outlet pipe 21. The disc-shaped spiral water channel 19 increases the contact area and contact time between the coolant and the bottom cover 11, improving heat dissipation. Efficiency; the inlet ends of the first water inlet pipe 18 and the second water inlet pipe 20 are connected to the main water inlet pipe 22 for convenient centralized supply of coolant; the outlet ends of the first water outlet pipe 17 and the second water outlet pipe 21 are connected to the main water outlet pipe 23 for convenient unified collection of coolant after heat dissipation and realization of coolant recycling; at the same time, multiple heat dissipation fins 26 are arranged on the outer circumference of the lower surface of the bottom cover 11, which increases the heat dissipation area. When the motor is running, the heat dissipation fins 26 dissipate the heat of the bottom cover 11 into the surrounding air through natural air convection, assisting the entire heat dissipation system in reducing the motor temperature.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A heat dissipation structure for an axial magnetic field motor winding, characterized in that: The heat dissipation assembly (1) includes a bottom cover (11), a stator winding frame (12), a coil (13), a heat-conducting plate (14), a heat-conducting ring (15), a columnar spiral water channel (16), a first water outlet pipe (17), a first water inlet pipe (18), a disc-shaped spiral water channel (19), a second water inlet pipe (20), and a second water outlet pipe (21). The outer side of the upper surface of the bottom cover (11) is provided with a plurality of stator winding skeletons (12) arranged in a circular pattern. The outer walls of the plurality of stator winding skeletons (12) are all wound with coils (13). A heat-conducting plate (14) is provided between two adjacent coils (13). The bottom of the heat-conducting plate (14) is fixedly connected to the upper surface of the bottom cover (11). A heat-conducting ring (15) is fixedly connected to the inner side of the upper surface of the bottom cover (11) near the stator winding skeletons (12). One end of the heat-conducting plate (14) is fixedly connected to the outer wall of the heat-conducting ring (15). A columnar spiral water channel (1) is provided inside the heat-conducting ring (15). 6) The upper and lower parts of the inner wall of the heat-conducting ring (15) are respectively provided with a first water outlet pipe (17) and a first water inlet pipe (18). The two ends of the column-type spiral water channel (16) are respectively connected to the water outlet end of the first water inlet pipe (18) and the water inlet end of the first water outlet pipe (17). The inside of the bottom cover (11) is provided with a disc-type spiral water channel (19). The bottom outer side and the inner side of the bottom cover (11) are respectively provided with a second water inlet pipe (20) and a second water outlet pipe (21). The two ends of the disc-type spiral water channel (19) are respectively connected to the water outlet end of the second water inlet pipe (20) and the water inlet end of the second water outlet pipe (21).

2. The heat dissipation structure for an axial magnetic field motor winding according to claim 1, characterized in that: The bottom of the first water outlet pipe (17) and the first water inlet pipe (18) both penetrate the upper surface of the bottom cover (11) near the inner side of the heat conduction ring (15). The water inlet ends of the first water inlet pipe (18) and the second water inlet pipe (20) are connected to the water inlet main pipe (22), and the water outlet ends of the first water outlet pipe (17) and the second water outlet pipe (21) are connected to the water outlet main pipe (23).

3. The heat dissipation structure for an axial magnetic field motor winding according to claim 1, characterized in that: A first insulating layer (24) is provided between the heat-conducting sheet (14) and the coil (13), and a second insulating layer (25) is provided between the heat-conducting coil (15) and the coil (13).

4. The heat dissipation structure for an axial magnetic field motor winding according to claim 1, characterized in that: The bottom cover (11) has multiple heat dissipation fins (26) arranged in a circular pattern on the outer side of its lower surface.

5. The heat dissipation structure for an axial magnetic field motor winding according to claim 4, characterized in that: The bottom cover (11) has a first mounting hole (27) at the center of its lower surface. The inner sidewall of the first mounting hole (27) is rotatably connected to an output shaft (29) via a first bearing (28). The outer sidewall of the output shaft (29) is fixedly connected to a rotor (30) near the upper part of the stator winding frame (12).

6. The axial magnetic field motor winding heat dissipation structure according to claim 5, characterized in that: The outer wall of the bottom cover (11) is fixedly connected to the housing (31). A second mounting hole (32) is provided at the center of the upper surface of the housing (31). The inner wall of the second mounting hole (32) is rotatably connected to the upper part of the outer wall of the output shaft (29) through the second bearing (33).

7. The heat dissipation structure for an axial magnetic field motor winding according to claim 5, characterized in that: The rotor (30) has multiple permanent magnets (34) arranged in a circular pattern on the outer side of its lower surface.

8. The heat dissipation structure for an axial magnetic field motor winding according to claim 1, characterized in that: A third insulating layer (35) is provided between the bottom cover (11) and the stator winding frame (12).

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