A self-regulating motor rotor air cooling structure

Abstract

The present invention provides a motor rotor self-adjusting air-cooling structure, including a rotating shaft, a rotor bracket, a rotor core, a permanent magnet, and a permanent magnet sheath which are fixedly sleeved from the inside to the outside in sequence; the interior of the rotor bracket is a hollow structure, including an air-cooling adjustment component, a flow guide structure, a flow blocking ring, and a support structure; at least one circumferentially uniformly distributed air-cooling adjustment component is arranged on the inner side of the outer ring of the rotor bracket, and each air-cooling adjustment component includes at least one heat dissipation fin and a self-adjusting structure; the self-adjusting structure can automatically adjust the inclination angle of the heat dissipation fin according to the temperature and speed of the rotor, thereby controlling the air flow. The present invention significantly improves the operating efficiency and heat dissipation efficiency of the motor, and improves its overall performance and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of motor cooling, and in particular to a self-regulating motor rotor wind cooling structure. Background Art

[0002] Permanent magnet motors have been widely used in electric vehicles, household appliances, wind power generation, industrial automation, medical equipment and other fields due to their advantages such as high efficiency, high reliability and high power density. As the performance requirements of motors in these application scenarios continue to increase, the stability and efficiency of permanent magnet motors have become key factors affecting the performance of the entire system. However, the performance of permanent magnets in permanent magnet motors is very sensitive to temperature. When the working environment or the temperature inside the motor is too high, the permanent magnets may undergo irreversible demagnetization, resulting in a decrease in the motor output power and reduced efficiency. Therefore, how to effectively control the temperature rise of permanent magnet motors has become a major challenge in current motor design.

[0003] At present, the common cooling method of permanent magnet motors mainly relies on air cooling, that is, by providing external flowing air or installing fan blades on the motor shaft to take away the heat in the air gap. Although this method can alleviate the temperature rise problem of permanent magnets to a certain extent, since the airflow is mainly concentrated on one side of the permanent magnet, it cannot fully cover the entire rotor and the surface of the permanent magnet, resulting in low heat dissipation efficiency. In addition, the additional heat dissipation structure often increases the complexity and volume of the motor, and fails to effectively utilize the existing internal resources to optimize the heat dissipation path. And when the motor runs at high speed and low load, the rotor temperature rise is not obvious at this time, but the high-speed movement of the fan blades will still maintain a high power loss. If the fan blade air volume is set to a small value, it is difficult to meet the heat dissipation requirements when running at low speed and high load. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] Based on this, the present invention provides a self-regulating motor rotor air cooling structure to solve the problem of complex permanent magnet rotor heat dissipation structure and low heat dissipation efficiency (that is, the motor has large power loss at high speed and low load, and poor heat dissipation at low speed and high load).

[0006] (II) Technical solution

[0007] In order to achieve the above object, the present invention provides a self-adjusting motor rotor wind cooling structure, comprising a rotating shaft, a rotor bracket, a rotor core, a permanent magnet and a permanent magnet sheath which are sequentially sleeved and fixed from the inside to the outside;

[0008] The interior of the rotor support is a hollow structure, including an air-cooling adjustment component, a flow-guiding structure, a flow-blocking ring, and a support structure; at least one air-cooling adjustment component evenly distributed along the circumferential direction is arranged on the inner side of the outer ring of the rotor support, and each of the air-cooling adjustment components includes at least one heat dissipation fin and a self-adjusting structure;

[0009] The heat dissipation fin comprises a left section of the heat dissipation fin, a right section of the heat dissipation fin, a fin shaft, a spherical support structure and a fin connecting ring; the left and right sections of the heat dissipation fin are installed on the rotor bracket through the fin shaft, and the direction of the fin shaft is the radial direction of the motor; the left and right sections of the heat dissipation fin are inclined at a certain angle to the fin shaft, and the inclination angles of the left and right sections are opposite, and they can rotate around the fin shaft; a fin connecting ring is provided on the left and right sections of the heat dissipation fin on the side opposite to the fin shaft, and the heat dissipation fin is connected to the adjacent heat dissipation fin through the fin connecting ring, and finally connected to the self-adjusting structure; and the left and right sections of the heat dissipation fin have spherical spherical support structures at the upper and lower ends of the side opposite to the fin shaft;

[0010] The self-adjusting structure is provided with a connecting ring, and is connected to the fin connecting rings on adjacent heat dissipating fins through the connecting ring. Adjacent heat dissipating fins are connected to each other through the fin connecting ring, so that the heat dissipating fins can adjust their angles as the connecting ring of the self-adjusting structure moves.

[0011] Preferably, the self-adjusting structure comprises a main piston, an auxiliary piston and a cylinder body; the main piston comprises an integrally formed main plunger, a main connecting rod and an end cover, a convex sealing ring is arranged on the outer side of the bottom of the main plunger, so that the bottom of the main plunger and the inner wall of the cylinder body form a sealed cylinder; the top of the main plunger is connected to the end cover; the main connecting rod is located between the main plunger and the end cover, and is centrally symmetrical, and the connecting rings are arranged at both ends of the main connecting rod, respectively connecting the fin connecting rings on the left and right sections of adjacent heat dissipation fins;

[0012] The auxiliary piston includes an integrally formed left plunger, a right plunger and an auxiliary connecting rod. Convex sealing rings are arranged on the outer sides of the bottoms of the left plunger and the right plunger, so that the bottoms of the left plunger and the right plunger form a sealed cylinder with the inner wall of the cylinder body; the two ends of the auxiliary connecting rod are respectively fixed on the left plunger and the right plunger, and a circular ring is arranged in the center thereof, which is sleeved between the main connecting rod and the end cover. The diameter of the circular ring is smaller than that of the end cover. When the main piston moves downward and the auxiliary piston is stationary, the auxiliary piston can generate thrust on the end cover through this circular ring.

[0013] Preferably, the cylinder body is three cylindrical containers with open upper ends, the upper ends of the cylindrical containers are provided with two centrally symmetrical movable grooves, and the movable grooves of the three cylindrical containers are in a straight line, and the auxiliary connecting rod can move vertically in the movable grooves; the cylinder body is a part of the air-cooling adjustment component and is fixedly arranged on the supporting structure of the rotor bracket; the bottom surfaces of the main plunger, left plunger and right plunger are in the same horizontal position in the cylinder body, and the main plunger, left plunger and right plunger can all move up and down in the cylinder body and form a cylinder with the bottom of the cylinder body; the cylinder is sealed and contains a temperature-sensitive gas in volume.

[0014] Preferably, the guide structure comprises at least one gas guide slot, which is arranged on the side of the rotor support and at a position separating two parts of the rotor core, and is evenly distributed in the circumferential direction.

[0015] Preferably, the baffle ring is a circular ring structure, located on the inner side of the air cooling adjustment component on the rotor bracket, and the axial length of the baffle ring is greater than the heat dissipation fin; one end of the fin shaft is fixed to the outside of the baffle ring, and the other end is fixed to the inner side of the outer wall of the rotor bracket.

[0016] Preferably, the support structure is provided with a plurality of through holes for reducing weight and a central circular hole for penetrating the rotating shaft on the inner side of the baffle ring.

[0017] Preferably, the permanent magnet sheath, the permanent magnet and the rotor core are divided into two parts in the axial direction of the motor, and there is a certain interval between the two parts.

[0018] (III) Beneficial effects

[0019] It can be seen from the above technical solution that the self-regulating motor rotor air cooling structure proposed by the present invention has the following beneficial effects:

[0020] 1. Through the reuse of heat dissipation fin structure functions, the air flows as the motor rotates, without the need for additional cooling equipment, and the contact area between the air and the rotor is increased, making air cooling more efficient, reducing the complexity of the motor system, improving the integration of the motor, and reducing manufacturing and maintenance costs.

[0021] 2. By dividing the heat dissipation fins into left and right sections and making the two sections of the heat dissipation fins tilted at opposite angles, a guide structure and a baffle ring are introduced into the rotor bracket to form a new air flow channel, so that air can flow in and out from both sides of the rotor effectively, optimizing the cooling air path, forming an orderly airflow distribution, and the cooling air is effectively guided into the air gap, thereby better cooling the rotor and permanent magnets.

[0022] 3. The self-adjusting structure enables the inclination angle of the heat sink fins to be automatically adjusted according to the temperature and speed of the motor rotor, thereby reducing the power loss of the motor at high speed and low load, and improving the heat dissipation effect of the motor at low speed and high load. Due to the improvement of the heat dissipation effect, the permanent magnet can operate at a lower temperature, reducing the demagnetization effect of high temperature on the permanent magnet, thereby ensuring the stable performance of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of an explosion of a motor of a self-adjusting motor rotor wind cooling structure according to an embodiment of the present invention;

[0025] Figure 2 is a front cross-sectional schematic diagram of a rotor support according to an embodiment of the present invention;

[0026] Figure 3 is a side cross-sectional schematic diagram of a rotor support according to an embodiment of the present invention;

[0027] Figure 4 This is a 1 / 8 structural schematic diagram of a rotor support according to an embodiment of the present invention;

[0028] Figure 5 It is a schematic structural diagram of a heat dissipation fin according to an embodiment of the present invention;

[0029] Figure 6 It is a side cross-sectional schematic diagram of the self-adjusting structure of an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the structure of the main piston and the auxiliary piston of the self-adjusting structure of an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of a cylinder of a self-adjusting structure according to an embodiment of the present invention;

[0032] Fig. 9 A fluid path diagram of a side cross-sectional schematic diagram of a motor 1 / 2 according to an embodiment of the present invention.

[0033] Wherein: 1, casing and stator, 2, rotating shaft, 3, rotor bracket, 4, permanent magnet sheath, 5, permanent magnet, 6, rotor core, 201, cooling fin, 201-1, left section of cooling fin, 201-2, right section of cooling fin, 202, flow guide structure, 203, flow blocking ring, 204, supporting structure, 205, self-adjusting structure, 301, main plunger, 302, cylinder, 303, connecting ring, 304, cylinder body, 305, left plunger, 306 right plunger, 307, connecting rod, 308, end cover, 309, main connecting rod, 401, fin rotating shaft, 402, spherical supporting structure, 403, fin connecting ring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The self-regulating motor rotor air cooling structure provided in this embodiment includes a rotating shaft 2, a rotor bracket 3, a rotor core 6, a permanent magnet 5, and a permanent magnet sheath 4, which are fixedly sleeved from the inside to the outside in sequence; wherein the permanent magnet sheath 4, the permanent magnet 5, and the rotor core 6 are divided into two parts in the axial direction of the motor, and there is a certain interval between the two parts. The exploded schematic diagram of the motor composed of the housing and the stator 1 and the self-regulating motor rotor air cooling structure is shown in FIG. Figure 1 shown.

[0036] The front cross-sectional schematic diagram of the rotor support 3 is as follows Figure 2 As shown, the side cross-sectional diagram is as follows Figure 3 As shown, the interior of the rotor support 3 is a hollow structure, including an air-cooling adjustment component, a flow-guiding structure 202, a baffle ring 203, and a support structure 204. At least one air-cooling adjustment component evenly distributed along the circumferential direction is arranged on the inner side of the outer ring of the rotor support. The air-cooling adjustment component includes at least one heat dissipating fin 201 and a self-adjusting structure 205. Figure 4 In addition, the support structure 204 is provided with a plurality of through holes for weight reduction and a central circular hole for penetrating the rotating shaft 2 on the inner side of the baffle ring 203 .

[0037] Preferably, the rotor support in the embodiment of the present invention includes 8 air-cooling adjustment components, and each air-cooling adjustment component includes 3 heat dissipation fins.

[0038] Figure 5Schematic diagram of the structure of the heat dissipation fin of the embodiment of the present invention, the heat dissipation fin 201 comprises a left heat dissipation fin section 201-1 and a right heat dissipation fin section 201-2, a fin shaft 401, a spherical support structure 402 and a fin connecting ring 403; the left and right heat dissipation fin sections 201-1 and 201-2 are mounted on the rotor bracket 3 through the fin shaft 401, and the direction of the fin shaft 401 is the radial direction of the motor; the left and right heat dissipation fin sections 201-1 and 201-2 are inclined at a certain angle to the fin shaft 401, and the inclination angles are opposite, and the left and right heat dissipation fin sections 201-1 and 201-2 can rotate around the fin shaft 401; the left and right heat dissipation fin sections 201-1 and 201-2 can rotate around the fin shaft 401; A fin connecting ring 403 is provided on the side of 201-1 and 201-2 opposite to the fin shaft 401, and the heat dissipating fin 201 is connected to the adjacent heat dissipating fin through the fin connecting ring 403 (that is, the fin connecting ring on the left section of the heat dissipating fin is connected to the fin connecting ring on the left section of the adjacent heat dissipating fin, and the fin connecting ring on the right section of the heat dissipating fin is connected to the fin connecting ring on the right section of the adjacent heat dissipating fin), and finally connected to the self-adjusting structure 205; and the left and right sections 201-1 and 201-2 of the heat dissipating fin have spherical ball support structures 402 at the upper and lower ends on the opposite side of the fin shaft 401, which are used to support the heat dissipating fin 201 and reduce its friction with the rotor bracket 3.

[0039] The purpose of providing the heat dissipation fins 201 is to drive the relative flow of air, and to converge in the middle of the left and right sections to form a higher air pressure. The heat dissipation fins 201 not only drive the air flow, but also increase the contact area between the rotor and the air.

[0040] Figure 6 is a side cross-sectional schematic diagram of the self-adjusting structure of this embodiment, Figure 7 Schematic diagram of the structure of the main piston and the auxiliary piston of the self-adjusting structure of the embodiment of the present invention, the self-adjusting structure 205 includes a main piston, an auxiliary piston and a cylinder 304; the main piston includes an integrally formed main plunger 301, a main connecting rod 309, and an end cover 308, a convex sealing ring is provided on the outer side of the bottom of the main plunger, so that the bottom of the main plunger and the inner wall of the cylinder form a sealed cylinder 302; the top of the main plunger is connected to the end cover; the main connecting rod 309 is located between the main plunger and the end cover, and is symmetrical in center, with connecting rings 303 at both ends, and the connecting rings 303 at both ends are respectively connected to the fin connecting rings 403 of the left section 201-1 and the right section 201-2 of the adjacent heat dissipation fins 201;

[0041] The auxiliary piston includes an integrally formed left plunger 305, a right plunger 306 and an auxiliary connecting rod 307. The outer sides of the bottoms of the left and right plungers are provided with convex sealing rings, so that the bottoms of the left and right plungers form a sealed cylinder 302 with the inner wall of the cylinder body; the two ends of the auxiliary connecting rod 307 are respectively fixed on the left plunger and the right plunger, and the center thereof has a ring sleeved between the main connecting rod 309 and the end cover 308. The diameter of the ring is smaller than the end cover. When the main piston moves downward and the auxiliary piston is stationary, the end cover can generate thrust on the auxiliary piston through the ring;

[0042] Figure 8 The schematic diagram of the cylinder of the self-adjusting structure of the embodiment of the present invention is shown in FIG. The cylinder is three cylindrical containers with openings at the upper ends. Two centrally symmetrical movable grooves are provided at the upper ends of the cylindrical containers, and the movable grooves of the three cylindrical containers are in a straight line. The auxiliary connecting rod can move vertically in the movable grooves. The cylinder is a part of the air-cooled adjustment component, and is fixedly arranged on the supporting structure of the rotor bracket; the bottom surfaces of the main plunger, the left plunger and the right plunger are at the same horizontal position in the cylinder, and the main plunger, the left plunger and the right plunger can move up and down in the cylinder, and form a cylinder 302 with the bottom of the cylinder; the cylinder 302 is sealed, and contains a gas whose volume is sensitive to temperature (when the temperature rises, the volume of the gas increases significantly; when the temperature drops, the volume of the gas decreases significantly).

[0043] The self-adjusting structure 205 is connected to the fin connecting rings 403 on the adjacent heat sink fins 201 through the connecting rings 303 , and the adjacent heat sink fins 201 are connected to each other through the fin connecting rings 403 , so that the heat sink fins 201 can adjust their angles as the connecting rings 303 of the self-adjusting structure 205 move.

[0044] The guide structure 202 includes at least one gas guide slot, which is arranged on the side of the rotor support 3 and at the position where the two parts of the rotor core 6 are spaced apart, and the gas guide slots are evenly distributed in the circumferential direction. The function of the guide structure is to provide a certain amount of power to the air flowing into the air gap between the left and right sections of the heat dissipation fins as the rotor rotates.

[0045] The baffle ring 203 is a circular ring structure and is located on the inner side of the air cooling adjustment component on the rotor bracket 3. The axial length of the baffle ring 203 is greater than the heat dissipation fin. One end of the fin shaft 401 is fixed to the outer side of the baffle ring 203, and the other end is fixed to the inner side of the outer wall of the rotor bracket 3. The function of the baffle ring is to prevent the gas between the left section 201-1 of the heat dissipation fin and the right section 201-2 of the heat dissipation fin from being depressurized from the inner ring of the rotor bracket 3.

[0046] The working principle of air cooling achieved by the present invention is as follows: when the motor is working, the rotor bracket 3 rotates together with the rotor (the rotor core 6, permanent magnet 5, and permanent magnet sheath 4 are all parts of the rotor), and the heat dissipation fins 201 rotate with the rotor and drive the air on both sides of the motor axis to flow relatively into the rotor bracket 3. The air converges at the center of the rotor bracket, and then the guide structure 202 drives the air into the motor air gap as the rotor rotates, and further provides power for the air flow, forming a higher pressure in the axial middle of the motor air gap; due to the existence of the pressure difference, the air will flow from the axial middle of the air gap to both sides, flow out of the motor and take away the heat, thereby realizing the motor self-fan cooling air circulation. The fluid path schematic diagram of the permanent magnet motor is shown in Fig. 9 As shown ( Fig. 9 Only half of the side view of the rotor bracket is shown for illustration). The functional reuse of the heat dissipation fins further increases the contact area between the rotor and the cooling air, thereby improving the heat dissipation capacity of the motor rotor.

[0047] Furthermore, the air-cooling adjustment component can achieve autonomous adjustment, and its working principle is as follows: when the motor is operating under low-load conditions, the rotor temperature is low, the gas volume in the cylinder 302 is small, the main plunger, the left plunger and the right plunger are almost located at the bottom of the cylinder body 304, and the cooling fins 201 are almost parallel to the tangential direction of the rotor rotation. The cooling fins 201 have a low driving ability for the air, and the power loss generated is also small; when the motor is operating under high-load conditions, the rotor temperature is high, the gas in the cylinder 302 expands due to heat, and the main plunger, the left plunger and the right plunger move slowly. When the motor speed is low, the reaction force of the air on the heat sink fins is small, the pulling force of the heat sink fins 201 on the main plunger 301 is small, the relative displacement between the main plunger 301 and the left plunger 305 and the right plunger 306 is small, and only the main plunger 301 pulls the fin connecting ring 403 of the heat sink fins 201 through the connecting ring 303. The inclination angle between the heat sink fins 201 and the tangential direction of the rotor rotation gradually increases, which has a strong driving effect on the air, generates a large flow rate, and takes away the heat; when the motor speed is high, the reaction force of the air on the heat sink fins is large, and the main plunger 301 is pulled by the heat sink fins 201. 01 has a large pulling force, resulting in the displacement of the main plunger 301 being much smaller than the displacement of the left plunger 305 and the right plunger 306. The relative displacement between the main plunger 301 and the left plunger 305 and the right plunger 306 is large, until the left plunger 305 and the right plunger 306 are connected to the end cover 308 of the main piston through the connecting rod 307. The left plunger and the right plunger generate thrust on the end cover 308 of the main piston, thereby realizing that the main piston and the auxiliary piston pull the heat sink fin 201 at the same time, and the inclination angle of the heat sink fin 201 with the tangential direction of the rotor rotation gradually increases, which has a stronger driving effect on the air, generates a larger flow rate, and takes away the heat.

[0048] The present invention realizes self-regulation of cooling air volume through the above principle, which is beneficial to reducing the power loss of the motor under high-speed and low-load conditions and enhancing the heat dissipation capacity of the motor under low-speed and high-load conditions.

[0049] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-regulating motor rotor air cooling structure, characterized in that: The motor comprises a rotating shaft, a rotor support, a rotor core, a permanent magnet and a permanent magnet sheath which are sequentially sleeved and fixed from the inside to the outside; the permanent magnet sheath, the permanent magnet and the rotor core are divided into two parts in the axial direction of the motor, and there is a certain interval between the two parts; The interior of the rotor support is a hollow structure, including an air-cooling adjustment component, a flow-guiding structure, a flow-blocking ring, and a support structure; at least one air-cooling adjustment component evenly distributed along the circumferential direction is arranged on the inner side of the outer ring of the rotor support, the air-cooling adjustment component and the flow-blocking ring are evenly distributed around the circumference of the support structure, and the flow-blocking ring is located on the radial inner side of the air-cooling adjustment component, and each of the air-cooling adjustment components includes at least one heat dissipation fin and a self-adjusting structure; the flow-guiding structure includes at least one gas flow-guiding slot hole, and the gas flow-guiding slot hole is arranged on the side of the rotor support and is located at a position where the two parts of the rotor core are separated; The heat dissipation fin comprises a left section of the heat dissipation fin, a right section of the heat dissipation fin, a fin shaft, a spherical support structure and a fin connecting ring; the left and right sections of the heat dissipation fin are installed on the rotor bracket through the fin shaft, and the direction of the fin shaft is the radial direction of the motor; the left and right sections of the heat dissipation fin are inclined at a certain angle to the fin shaft, and the inclination angles of the left and right sections are opposite, and they can rotate around the fin shaft; a fin connecting ring is provided on the left and right sections of the heat dissipation fin on the side opposite to the fin shaft, and the heat dissipation fin is connected to the adjacent heat dissipation fin through the fin connecting ring, and finally connected to the self-adjusting structure; and the left and right sections of the heat dissipation fin have spherical spherical support structures at the upper and lower ends of the side opposite to the fin shaft; The self-adjusting structure is provided with a connecting ring, and is connected to the fin connecting rings on adjacent heat dissipating fins through the connecting ring. Adjacent heat dissipating fins are connected to each other through the fin connecting ring, so that the heat dissipating fins can adjust their angles as the connecting ring of the self-adjusting structure moves.

2. A self-regulating motor rotor air cooling structure according to claim 1, characterized in that: The self-adjusting structure includes a main piston, an auxiliary piston and a cylinder body; the main piston includes an integrally formed main plunger, a main connecting rod and an end cover; a convex sealing ring is provided on the outer side of the bottom of the main plunger so that the bottom of the main plunger and the inner wall of the cylinder body form a sealed cylinder; the top of the main plunger is connected to the end cover; the main connecting rod is located between the main plunger and the end cover and is centrally symmetrical; the connecting rings are provided at both ends of the main connecting rod, respectively connecting the fin connecting rings on the left and right sections of adjacent heat dissipation fins; The auxiliary piston includes an integrally formed left plunger, a right plunger and an auxiliary connecting rod. Convex sealing rings are arranged on the outer sides of the bottoms of the left plunger and the right plunger, so that the bottoms of the left plunger and the right plunger form a sealed cylinder with the inner wall of the cylinder body; the two ends of the auxiliary connecting rod are respectively fixed on the left plunger and the right plunger, and a circular ring is arranged in the center thereof, which is sleeved between the main connecting rod and the end cover. The diameter of the circular ring is smaller than that of the end cover. When the main piston moves downward and the auxiliary piston is stationary, the auxiliary piston can generate thrust on the end cover through this circular ring.

3. A self-regulating motor rotor air cooling structure according to claim 2, characterized in that: The cylinder body is three cylindrical containers with open upper ends, and two centrally symmetrical movable grooves are provided at the upper ends of the cylindrical containers, and the movable grooves of the three cylindrical containers are in a straight line, and the auxiliary connecting rod can move vertically in the movable grooves; the cylinder body is a part of the air-cooling adjustment component and is fixedly arranged on the supporting structure of the rotor bracket; The bottom surfaces of the main plunger, the left plunger and the right plunger are at the same horizontal position in the cylinder body, and the main plunger, the left plunger and the right plunger can move up and down in the cylinder body and form a cylinder with the bottom of the cylinder body; the cylinder is sealed and contains a temperature-sensitive gas in volume.

4. The self-regulating motor rotor air cooling structure according to claim 1, characterized in that: The gas guide slots are evenly distributed in the circumferential direction.

5. The self-regulating motor rotor air cooling structure according to claim 1, characterized in that: The baffle ring is a circular ring structure, and the axial length of the baffle ring is greater than the heat dissipation fin; one end of the fin shaft is fixed to the outside of the baffle ring, and the other end is fixed to the inside of the outer wall of the rotor bracket.

6. The self-regulating motor rotor air cooling structure according to claim 1, characterized in that: The support structure is provided with a plurality of through holes for reducing weight and a central circular hole for penetrating the rotating shaft on the inner side of the baffle ring.

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