High-power motor structure with multiple cooling modes for hovercar

Abstract

The utility model discloses a high-power motor structure with multiple cooling modes for an aerocar. The high-power motor structure comprises a motor and a cooling system, the motor comprises a stator assembly, a rotor assembly and a supporting assembly. The stator assembly and the rotor assembly are rotationally connected through the supporting assembly. The stator iron core is fixed on the outer peripheral surface of the stator bracket in a surrounding manner; the winding is wound in a tooth groove of the stator iron core; the permanent magnets are sequentially and fixedly arranged on the inner wall of the rotor shell; the upper end cover and the lower end cover are respectively fixed at the upper and lower ends of the rotor shell; in the supporting assembly, a hole is formed in the middle of a stator support, a rotating shaft penetrates through the hole and is rotationally connected with an inner bearing of the stator support, the upper end of the rotating shaft is fixedly connected with an upper end cover through a coupling flange, and the lower end is rotationally connected with the stator support through an end cover bearing. The motor dissipates heat through three cooling modes of a water cooling structure, an oil cooling structure and an air cooling structure. According to the utility model, three cooling modes of air cooling, water cooling and oil cooling are integrated, so that the temperature rise of the motor is greatly reduced, and the motor can output higher power.

Description

Technical Field

[0001] The utility model relates to the technical field of high-power motor heat dissipation, and in particular to a high-power motor structure with multiple cooling modes for a flying car. Background Art

[0002] As a product of the new era, electric flying cars are currently in their infancy both at home and abroad. Electric flying cars use motors to drive propellers to rotate at high speeds, generating sufficient lift to quickly climb vertically. This requires the motor to output high power in a short period of time. External rotor motors have the characteristics of high torque density and high power density, and therefore are more commonly used in the field of aircraft.

[0003] However, the heat dissipation problem is a key factor affecting the high-power output of the outer rotor motor. Since the stator core is inside, a large amount of heat generated by the core winding will accumulate inside the motor. If the heat cannot be removed from the inside of the motor in time, the motor temperature will be too high. In severe cases, the permanent magnet will be demagnetized, affecting the power performance of the motor and further affecting the safety of the flying car. The cooling methods of the outer rotor motor include air cooling or liquid cooling. The heat dissipation efficiency of air cooling is relatively low. For the motor under the take-off condition of the flying car, it is difficult to effectively dissipate the heat by air cooling alone. At this time, forced liquid cooling is required. In order to improve the heat exchange efficiency of high-power motors, the present application proposes a high-power motor structure with multiple cooling methods for flying cars. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a high-power motor structure with multiple cooling methods for a flying car. By setting an air cooling structure, a liquid cooling structure and an oil cooling structure, three cooling methods are used to cool the outer rotor motor together to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-power motor structure with multiple cooling modes for a flying car comprises a motor, wherein the motor is an outer rotor motor and also comprises a cooling system; the motor comprises a stator assembly, a rotor assembly and a support assembly, wherein the stator assembly is arranged inside the motor, and the rotor assembly is arranged outside the motor, and the stator assembly and the rotor assembly are rotatably connected via the support assembly; the stator assembly comprises a stator core, a winding and a stator bracket, wherein the stator core is fixed around the outer peripheral surface of the stator bracket, and the winding is wound in the tooth slots of the stator core; the rotor assembly comprises a rotor housing, a permanent magnet, an upper end cover and a lower end cover ... The permanent magnets are fixedly arranged in sequence on the inner wall of the rotor housing, and the upper end cover and the lower end cover are respectively fixed on the upper and lower ends of the rotor housing; the support assembly includes a rotating shaft, a coupling flange, an inner bearing and an end cover bearing; a hole is opened in the middle of the stator bracket, the rotating shaft passes through it and is rotatably connected to the inner bearing of the stator bracket, the upper end of the rotating shaft is fixedly connected to the upper end cover through the coupling flange, and the lower end is rotatably connected to the stator bracket through the end cover bearing; the cooling system is divided into a water cooling structure, an oil cooling structure and an air cooling structure, and the motor dissipates heat through three cooling methods of the water cooling structure, the oil cooling structure and the air cooling structure.

[0007] Furthermore, when current is passed through the winding coil, a rotating magnetic field is generated. After the permanent magnet on the inner wall of the rotor housing receives the rotating magnetic field, it generates an interaction force with the winding. Since the winding is fixedly wound on the stator core, the permanent magnet is rotated by force, and the rotor housing fixedly connected to the permanent magnet also rotates, thereby driving the upper end cover of the rotor housing to rotate.

[0008] Furthermore, the water cooling structure includes a water inlet, a water outlet and a spiral heat exchange pipe, the water inlet and the water outlet are respectively the two ends of the spiral heat exchange pipe, the outer wall of the stator bracket and the inner wall of the stator core are respectively provided with a surrounding spiral groove, the surrounding spiral groove limits the spiral heat exchange pipe so that it is tightly attached to the inner surface of the stator core.

[0009] Furthermore, the water inlet and the water outlet are located at the lower end of the stator bracket. After the cooling water is introduced into the spiral heat exchange pipe, the spiral heat exchange pipe contacts the inner surface of the stator core. With the flow of cooling water, the heat transferred from the winding and the stator core to the inner surface of the stator core is taken away. The cooling water flows in a circular manner to the upper end of the stator bracket. The spiral heat exchange pipe extends from the inner cavity of the stator bracket to the water outlet at the lower end, takes away the heat, and completes water cooling.

[0010] Furthermore, the oil cooling structure includes an oil inlet, an oil distribution pipe, an oil spray port, an oil collecting tank and an oil outlet. The interior of the rotating shaft is hollow. The oil inlet is arranged at the bottom end of the rotating shaft. The left and right openings at the top end of the rotating shaft are connected to the oil distribution pipe. The other end of the oil distribution pipe is an oil spray port. The oil spray port is arranged above the winding. An oil collecting tank is arranged below the winding, and the oil collecting tank is clamped and fixed to the bottom end of the stator bracket.

[0011] Furthermore, the oil enters the oil inlet at the bottom end of the rotating shaft, enters the hollow cavity of the rotating shaft, and then enters the oil distribution pipe. The oil distribution pipe rotates as the rotating shaft rotates. The oil flows out from the oil spray port at the end of the oil distribution pipe, splashes onto the stator core and winding below, performs contact heat exchange, and finally falls into the oil collecting tank to complete oil cooling and heat dissipation.

[0012] As a preferred solution, the oil collecting tank is inclined toward the center, and the oil that has completed heat dissipation moves toward the middle of the oil collecting tank and flows out from the oil outlet of the cavity at the lower end of the stator bracket.

[0013] As a preferred solution, the upper end cover is provided with a hanging ear for supporting the oil distribution pipe.

[0014] Furthermore, the air cooling structure comprises air cooling blades, an air inlet and an air outlet, the upper end cover is provided with air cooling blades, the gap between adjacent air cooling blades is the air inlet, and the air outlet is provided at the bottom of the stator bracket.

[0015] Furthermore, the upper end cover rotates so that the air-cooling blades drive the air flow to blow into the interior of the motor from top to bottom, which not only completes air-cooling and heat dissipation for the winding and the stator core, but also can dissipate heat for the oil.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] Compared with the existing motor structure, the utility model adopts three cooling systems to dissipate heat from the motor, and sets a water cooling structure, an oil cooling structure and an air cooling structure. The water cooling structure specifically takes away the heat from the inner surface of the stator core through the surrounding flow of the spiral heat exchange pipe, and finally discharges it from the water outlet with the flow of water, completing water cooling and heat dissipation; the oil cooling structure specifically drives the oil distribution pipe to rotate through the rotating shaft, so that the oil splashes from the oil spray port onto the stator core and the winding, performs contact heat dissipation, and finally falls into the oil collecting tank to complete oil cooling and heat dissipation; the air cooling structure specifically drives the air cooling blades to drive the air flow from top to bottom into the motor through the rotating upper end cover, and blows the heat inside the motor to the outside of the system to complete air cooling and heat dissipation. The utility model combines the three cooling methods of air cooling, water cooling and oil cooling into one, gives full play to the advantages of each cooling method, can perform all-round cooling on the entire stator core and winding, greatly reduces the temperature rise of the motor, and enables the motor to output greater power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the stator assembly of the utility model;

[0020] Figure 3It is a structural schematic diagram of the rotor assembly of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the support assembly of the utility model;

[0022] Figure 5 It is a cross-sectional view of the motor assembly of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the stator bracket of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the water cooling structure of the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the spiral heat exchange pipeline of the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the oil cooling structure of the utility model;

[0027] Fig.10 This is a schematic diagram of the oil channel flow of the oil cooling structure of the utility model;

[0028] Fig.11 This is a schematic diagram of the connection between the oil collecting tank and the stator bracket of the utility model;

[0029] Fig.12 This is a schematic diagram of the connection between the upper end cover and the air-cooling blades of the utility model;

[0030] Fig.13 This is a schematic diagram of the air duct flow of the air cooling structure of the utility model;

[0031] In the figure: 100, motor; 110, stator assembly; 111, stator core; 112, winding; 113, stator bracket; 120, rotor assembly; 121, rotor housing; 122, permanent magnet; 123, upper end cover; 124, lower end cover; 130, support assembly; 131, rotating shaft; 132, coupling flange; 133, inner bearing; 134, end cover bearing; 200, cooling system system; 210, water cooling structure; 211, water inlet; 212, spiral heat exchange pipe; 213, water outlet; 220, oil cooling structure; 221, oil inlet; 222, oil distribution pipe; 223, oil injection port; 224, oil collecting tank; 225, oil outlet; 226, hanging ear; 230, air cooling structure; 231, air cooling blades; 232, air inlet; 233, air outlet; 234, air duct. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0033] See also Figure 1-13 , this embodiment provides a technical solution:

[0034] A high-power motor structure with multiple cooling modes for a flying car includes a motor 100, wherein the motor 100 is an outer rotor motor and also includes a cooling system 200; the motor 100 includes a stator assembly 110, a rotor assembly 120 and a support assembly 130, wherein the stator assembly 110 is arranged inside the motor 100, and the rotor assembly 120 is arranged outside the motor 100, and the stator assembly 110 and the rotor assembly 120 are rotatably connected through the support assembly 130; the stator assembly 110 includes a stator core 111, a winding 112 and a stator bracket 113, wherein the stator core 111 is fixed around the outer circumference of the stator bracket 113, and the winding 112 is wound in the tooth slots of the stator core 111; the rotor assembly 120 includes a rotor housing 121, a permanent magnet 122, an upper end cover 123 and a lower end cover 124 ... The permanent magnets 122 are fixedly arranged in sequence on the inner wall of the rotor housing 121, and the upper end cover 123 and the lower end cover 124 are respectively fixed on the upper and lower ends of the rotor housing 121; the support assembly 130 includes a rotating shaft 131, a coupling flange 132, an inner bearing 133 and an end cover bearing 134, the middle part of the stator bracket 113 is opened, the rotating shaft 131 passes through it and is rotatably connected to the inner bearing 133 of the stator bracket 113, the upper end of the rotating shaft 131 is fixedly connected to the upper end cover 123 through the coupling flange 132, and the lower end is rotatably connected to the stator bracket 113 through the end cover bearing 134; the cooling system 200 is divided into a water cooling structure 210, an oil cooling structure 220 and an air cooling structure 230, and the motor 100 dissipates heat through three cooling methods of the water cooling structure 210, the oil cooling structure 220 and the air cooling structure 230.

[0035] Compared with the existing motor structure, this embodiment adopts three cooling systems to dissipate heat from the motor 100. By setting a water cooling structure 210, an oil cooling structure 220 and an air cooling structure 230, the water cooling structure 210 specifically takes away the heat from the inner surface of the stator core 111 through the circumferential flow of the spiral heat exchange pipe 212, and finally discharges it from the water outlet 213 as the water flows, thereby completing water cooling and heat dissipation; the oil cooling structure 220 specifically drives the oil distribution pipe 222 to rotate by rotating the rotating shaft 131, so that the oil splashes from the oil spray port 223 onto the stator core 111 and the winding 112 for contact heat dissipation, and finally falls into the oil collecting tank 224 to complete oil cooling and heat dissipation; the air cooling structure 230 specifically drives the air cooling blades 231 to drive the air flow from top to bottom into the interior of the motor 100 through the rotating upper end cover 123, and blows the heat inside the motor 100 to the outside of the system to complete air cooling and heat dissipation. This embodiment combines the three cooling methods of air cooling, water cooling and oil cooling into one, giving full play to the advantages of each cooling method, and can perform all-round cooling on the entire stator core 111 and winding 112, greatly reducing the temperature rise of the motor 100, so that the motor 100 can output greater power.

[0036] The power generation principle of this embodiment is as follows: when current is passed through the coil of the winding 112, a rotating magnetic field is immediately generated. After the permanent magnet 122 on the inner wall of the rotor housing 121 receives the rotating magnetic field, an interaction force is generated with the winding 112. Since the winding 112 is fixedly wound on the stator core 111, the permanent magnet 122 is rotated by force, and the rotor housing 121 fixedly connected to the permanent magnet 122 also rotates, thereby driving the upper end cover 123 of the rotor housing 121 to rotate; the rotation generated in this embodiment provides conditions for the air cooling structure 230 and the oil cooling structure 220.

[0037] The water cooling structure 210 of this embodiment is specifically as follows: Figure 6-Figure 8 As shown:

[0038] The water cooling structure 210 includes a water inlet 211, a water outlet 213 and a spiral heat exchange pipe 212. The water inlet 211 and the water outlet 213 are respectively the two ends of the spiral heat exchange pipe 212. The outer wall of the stator bracket 113 and the inner wall of the stator core 111 are respectively provided with a surrounding spiral groove. The surrounding spiral groove limits the spiral heat exchange pipe 212 so that it is tightly attached to the inner surface of the stator core 111. The specific process of water cooling is as follows: the water inlet 211 and the water outlet 213 are located at the lower end of the stator bracket 113. After the cooling water is introduced into the spiral heat exchange pipe 212, the spiral heat exchange pipe 212 contacts the inner surface of the stator core 111. With the flow of cooling water, the heat transferred from the winding 112 and the stator core 111 to the inner surface of the stator core 111 is taken away. The cooling water flows in a circular manner to the upper end of the stator bracket 113. The spiral heat exchange pipe 212 extends from the inner cavity of the stator bracket 113 to the water outlet 213 at the lower end to take away the heat and complete the water cooling.

[0039] The oil cooling structure 220 of this embodiment is specifically as follows: Figure 9-11 As shown:

[0040] The oil cooling structure 220 includes an oil inlet 221, an oil distribution pipe 222, an oil spray port 223, an oil collecting tank 224 and an oil outlet 225. The interior of the rotating shaft 131 is hollow. The oil inlet 221 is arranged at the bottom of the rotating shaft 131. The left and right openings at the top of the rotating shaft 131 are connected to the oil distribution pipe 222. The other end of the oil distribution pipe 222 is an oil spray port 223. The oil spray port 223 is arranged above the winding 112. An oil collecting tank 224 is arranged below the winding 112. The oil collecting tank 224 is fixed to the bottom of the stator bracket 113 by clamping. The specific process of oil cooling and heat dissipation is as follows: Fig.10 , Fig.10 The black arrow in the figure represents the flow direction of the oil. The oil enters the oil inlet 221 at the bottom of the rotating shaft 131, enters the hollow cavity of the rotating shaft 131, and then enters the oil distribution pipe 222. The oil distribution pipe 222 rotates with the rotation of the rotating shaft 131. The oil flows out from the oil injection port 223 at the end of the oil distribution pipe 222, splashes to the stator core 111 and the winding 112 below, performs contact heat exchange, and finally falls into the oil collecting tank 224 to complete the oil cooling and heat dissipation. The oil collecting tank 224 is inclined toward the center, and the oil that has completed the heat dissipation moves toward the middle of the oil collecting tank 224 and flows out from the oil outlet 225 of the cavity at the lower end of the stator bracket 113; in this embodiment, since the oil distribution pipe 222 is fixedly connected to the rotating shaft 131, the rotation of the rotating shaft 131 will also rotate the oil distribution pipe 222, so that the oil can contact the entire stator core 111 and the winding 112 to achieve the heat exchange effect.

[0041] In order to further improve the stability of the oil distribution pipe 222 , the upper end cover 123 is provided with a hanging ear 226 for supporting the oil distribution pipe 222 .

[0042] The air cooling structure 230 of this embodiment is specifically as follows: Figure 12-13 As shown:

[0043] The air cooling structure 230 includes air cooling blades 231, air inlets 232 and air outlets 233. The upper end cover 123 is provided with air cooling blades 231, the gap between adjacent air cooling blades 231 is the air inlet 232, and the air outlet 233 is provided at the bottom of the stator bracket 113. The specific process of air cooling and heat dissipation is as follows: Fig.13 , Fig.13 The black arrow in the figure represents the air duct 234 (specifically: air inlet 232 → winding 112 and stator core 111 → oil collecting tank 224 → lower end cavity of stator bracket 113 → air outlet 233). The upper end cover 123 rotates so that the air-cooling blades 231 drive the air flow to blow into the interior of the motor 100 from top to bottom, which not only completes air cooling and heat dissipation of the winding 112 and the stator core 111, but also dissipates heat from the oil.

[0044] The above is a preferred implementation mode of the present invention, but the implementation mode of the present invention is not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A high-power motor structure with multiple cooling methods for a flying car, comprising a motor, wherein the motor is an outer rotor motor, characterized in that: It also includes a cooling system; the motor includes a stator assembly, a rotor assembly and a support assembly, the stator assembly is arranged inside the motor, the rotor assembly is arranged outside the motor, and the stator assembly and the rotor assembly are rotatably connected through the support assembly; the stator assembly includes a stator core, a winding and a stator bracket, the stator core is fixed around the outer circumference of the stator bracket, and the winding is wound in the tooth slots of the stator core; the rotor assembly includes a rotor housing, permanent magnets, an upper end cover and a lower end cover, the permanent magnets are fixedly arranged on the inner wall of the rotor housing in sequence, the upper end cover is The end cover and the lower end cover are respectively fixed to the upper and lower ends of the rotor housing; the support assembly includes a rotating shaft, a coupling flange, an inner bearing and an end cover bearing; a hole is opened in the middle of the stator bracket, the rotating shaft passes through it and is rotatably connected to the inner bearing of the stator bracket; the upper end of the rotating shaft is fixedly connected to the upper end cover through the coupling flange, and the lower end is rotatably connected to the stator bracket through the end cover bearing; the cooling system is divided into a water cooling structure, an oil cooling structure and an air cooling structure, and the motor dissipates heat through three cooling methods: a water cooling structure, an oil cooling structure and an air cooling structure.

2. A high-power motor structure with multiple cooling methods for a flying car according to claim 1, characterized in that: When current is passed through the winding coil, a rotating magnetic field is generated. After the permanent magnet on the inner wall of the rotor housing receives the rotating magnetic field, it generates an interaction force with the winding. Since the winding is fixedly wound on the stator core, the permanent magnet is rotated by force, and the rotor housing fixedly connected to the permanent magnet also rotates, thereby driving the upper end cover of the rotor housing to rotate.

3. A high-power motor structure with multiple cooling methods for a flying car according to claim 2, characterized in that: The water cooling structure includes a water inlet, a water outlet and a spiral heat exchange pipe, wherein the water inlet and the water outlet are respectively the two ends of the spiral heat exchange pipe, and the outer wall of the stator bracket and the inner wall of the stator core are respectively provided with surrounding spiral grooves, and the surrounding spiral grooves limit the spiral heat exchange pipe so that it is tightly attached to the inner surface of the stator core.

4. A high-power motor structure with multiple cooling methods for a flying car according to claim 3, characterized in that: The water inlet and the water outlet are located at the lower end of the stator bracket. After the cooling water is introduced into the spiral heat exchange pipe, the spiral heat exchange pipe contacts the inner surface of the stator core. With the flow of cooling water, the heat transferred from the winding and the stator core to the inner surface of the stator core is taken away. The cooling water flows in a circular manner to the upper end of the stator bracket. The spiral heat exchange pipe extends from the inner cavity of the stator bracket to the water outlet at the lower end to take away the heat and complete the water cooling.

5. The high-power motor structure with multiple cooling methods for a flying car according to claim 2, characterized in that: The oil cooling structure includes an oil inlet, an oil distribution pipe, an oil spray port, an oil collecting tank and an oil outlet. The interior of the rotating shaft is hollow. The oil inlet is arranged at the bottom end of the rotating shaft. The left and right openings at the top end of the rotating shaft are connected to the oil distribution pipe. The other end of the oil distribution pipe is an oil spray port. The oil spray port is arranged above the winding. An oil collecting tank is arranged below the winding, and the oil collecting tank is clamped and fixed to the bottom end of the stator bracket.

6. A high-power motor structure with multiple cooling methods for a flying car according to claim 5, characterized in that: The oil enters the oil inlet at the bottom of the shaft, enters the hollow cavity of the shaft, and then enters the oil distribution pipe. The oil distribution pipe rotates with the rotation of the shaft. The oil flows out from the oil nozzle at the end of the oil distribution pipe, splashes onto the stator core and winding below, performs contact heat exchange, and finally falls into the oil collecting tank to complete oil cooling and heat dissipation.

7. A high-power motor structure with multiple cooling methods for a flying car according to claim 6, characterized in that: The oil collecting tank is inclined toward the center, and the oil that has completed heat dissipation moves toward the middle of the oil collecting tank and flows out from the oil outlet of the cavity at the lower end of the stator bracket.

8. The high-power motor structure with multiple cooling methods for a flying car according to claim 5, characterized in that: The upper end cover is provided with a hanging ear for supporting the oil distribution pipe.

9. The high-power motor structure with multiple cooling methods for a flying car according to claim 2, characterized in that: The air cooling structure comprises air cooling blades, an air inlet and an air outlet. The upper end cover is provided with air cooling blades, the gap between adjacent air cooling blades is the air inlet, and the air outlet is arranged at the bottom of the stator bracket.

10. A high-power motor structure with multiple cooling methods for a flying car according to claim 9, characterized in that: The upper end cover rotates so that the air-cooling blades drive the air flow to blow into the interior of the motor from top to bottom, which not only completes air cooling and heat dissipation for the winding and the stator core, but also can dissipate heat for the oil.

Images