Liquid cooling heat dissipation system of motor

Abstract

The invention relates to the technical field of new energy automobile motors, in particular to a motor liquid cooling heat dissipation system which comprises a motor, a liquid storage device, a circulating device, a liquid pump and a cooler. The circulating device comprises a touch wheel, a liquid pumping mechanism and a cooling cover, the touch wheel is mounted on the rotor assembly and driven by the rotating assembly to rotate, the liquid pumping mechanism is mounted on the machine shell and touched by the touch wheel, the cooling cover wraps the machine shell and is communicated with the liquid pumping mechanism, and the rotor assembly drives the touch wheel to rotate so as to drive the liquid pumping mechanism to pump cooling liquid provided by the cooler into the cooling cover. According to the motor liquid cooling heat dissipation system, the rotor assembly provides power for the touch wheel, and the touch wheel drives the liquid pumping mechanism to pump liquid, so that it is guaranteed that the liquid pumping efficiency of the liquid pumping mechanism is in direct proportion to the rotating speed of the rotor assembly, and the circulation efficiency of cooling liquid is matched with the heating degree of the motor; the purpose of improving the cooling effect of the liquid cooling heat dissipation system on the motor is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle motors, and particularly to a liquid cooling and heat dissipation system for a motor. Background Art

[0002] The motor is an important component for driving new energy vehicles. During the operation of the motor, heat is generated due to the flow of current through components such as windings. If heat cannot be dissipated in a timely and effective manner, it will cause the temperature of the motor to rise, thereby affecting the performance, efficiency, and service life of the motor.

[0003] In traditional technologies, for example, the utility model patent with the application number: CN202122799289.6 discloses a liquid-cooled double-shaft extension permanent magnet synchronous servo motor, including: a machine base, the machine base is provided with a coolant inlet, a cooling flow channel, and a coolant outlet. The coolant enters the cooling flow channel through the coolant inlet and flows out of the cooling flow channel through the coolant outlet to carry away the heat generated in the accommodation space, thereby improving the performance and efficiency of the motor.

[0004] However, when this liquid-cooled double-shaft extension permanent magnet synchronous servo motor is actually used, the circulation of the coolant in the machine base depends on the cooperation of an external liquid pump and a cooler. The circulation rate of the coolant in the machine base is controlled by the liquid pump. If the liquid pumping rate of the liquid pump is higher than the rotational speed of the rotor assembly of the motor, the heat generated by the stator assembly and the rotor assembly is lower than the heat dissipation effect, which easily increases the energy consumption of the liquid pump. If the liquid pumping rate of the liquid pump is lower than the rotational speed of the rotor assembly of the motor, the heat generated by the stator assembly and the rotor assembly is higher than the heat dissipation effect, resulting in the situation of motor overheating. There is a technical problem that it is difficult to effectively match the circulation efficiency of the coolant with the heating degree of the motor, and the cooling effect of the liquid cooling and heat dissipation system on the motor is not good. Summary of the Invention

[0005] Based on this, it is necessary to provide a liquid cooling and heat dissipation system for a motor in view of the current technical problem that it is difficult to effectively match the circulation efficiency of the coolant with the heating degree of the motor, and the cooling effect of the liquid cooling and heat dissipation system on the motor is not good.

[0006] A liquid cooling and heat dissipation system for a motor includes: a motor, a liquid storage device, a circulation device, a liquid pump, and a cooler. The motor includes a machine shell, a stator assembly, and a rotor assembly. The circulation device includes a trigger wheel installed on the rotor assembly and driven to rotate by the rotation assembly, a liquid pumping mechanism installed on the machine shell and triggered by the trigger wheel, and a cooling cover covering the machine shell and communicating with the liquid pumping mechanism. Among them, the rotor assembly drives the trigger wheel to rotate to drive the liquid pumping mechanism to pump the coolant provided by the cooler into the cooling cover.

[0007] In one embodiment, the liquid pumping mechanism includes a liquid pumping chamber having a communicating liquid inlet, a liquid storage chamber, a pressurizing chamber, and a liquid outlet, a liquid pumping assembly for being touched by the driving wheel to pump the coolant in the pressurizing chamber into the liquid outlet, and a check valve disposed between the liquid storage chamber and the pressurizing chamber for blocking the coolant in the pressurizing chamber from flowing back into the liquid storage chamber.

[0008] In one embodiment, the volume of the pressurizing chamber is smaller than the volume of the liquid storage chamber.

[0009] In one embodiment, the number of the liquid pumping assemblies is two. One of the liquid pumping assemblies is correspondingly disposed with the pressurizing chamber, and the other liquid pumping assembly is correspondingly disposed with the liquid storage chamber.

[0010] In one embodiment, the liquid pumping assembly includes a liquid pumping sleeve installed on the liquid pumping chamber. The liquid pumping sleeve has a pressurizing space communicating with the pressurizing chamber and a reset member for driving the pressurizing space to reset. Wherein, the driving wheel presses the liquid pumping sleeve to pump the coolant in the pressurizing space into the liquid pumping chamber.

[0011] In one embodiment, the liquid pumping assembly further includes a protection sheet installed on the liquid pumping chamber and disposed between the liquid pumping sleeve and the driving wheel.

[0012] In one embodiment, the reset member includes a pressing block disposed in the pressurizing space and abutted against the liquid pumping sleeve, and a spring sheet installed on the liquid pumping chamber for providing an elastic force between the pressing block and the liquid pumping sleeve.

[0013] In one embodiment, the driving wheel includes a follower wheel and a driving head. The follower wheel is installed on the rotor assembly and is provided with an installation hole. The driving head is detachably connected to the installation hole and drives the liquid pumping mechanism to actuate.

[0014] In one embodiment, the machine shell has a cooling area and a heat dissipation area. The cooling area is covered by the cooling cover, and the heat dissipation area is provided with a heat dissipation port.

[0015] In one embodiment, the machine shell is provided with a slot. The liquid pumping mechanism is installed in the slot and encloses a rotating space with the machine shell for the driving wheel to rotate.

[0016] The beneficial effects of the motor liquid cooling and heat dissipation system of the present invention are:

[0017] 1. By adopting the method of using a trigger wheel installed on the rotor assembly to trigger the liquid pumping mechanism to pump the coolant into the cooling cover wrapped around the casing, it is beneficial for the rotor assembly to provide power for the trigger wheel, drive the liquid pumping mechanism to pump liquid through the trigger wheel, thereby ensuring that the liquid pumping efficiency of the liquid pumping mechanism is proportional to the rotational speed of the rotor assembly, making the circulation efficiency of the coolant match the heating degree of the motor, and achieving the purpose of improving the cooling effect of the liquid cooling and heat dissipation system on the motor;

[0018] 2. By adopting the method of using the liquid pumping component of the liquid pumping mechanism to pump the coolant in the pressurizing chamber into the liquid outlet, and setting a check valve between the liquid storage chamber and the pressurizing chamber, it is beneficial to avoid the coolant flowing back from the pressurizing chamber to the liquid storage chamber during the process of the liquid pumping component pressurizing the pressurizing chamber, thereby effectively improving the liquid pumping stability of the liquid pumping mechanism;

[0019] 3. By adopting the method that the volume of the pressurizing chamber is smaller than the volume of the liquid storage chamber, when the check valve is closed, the pressurizing effect of the liquid pumping component on the pressurizing chamber can be effectively increased, and at the same time, the coolant can be effectively stored in the liquid storage chamber. When the check valve is opened, due to the pressure difference between the liquid storage chamber and the pressurizing chamber, the coolant in the liquid storage chamber can be quickly pumped into the pressurizing chamber, achieving the purpose of improving the liquid pumping efficiency of the liquid pumping mechanism;

[0020] 4. By adopting the method of installing the liquid pumping mechanism in the embedded groove of the casing and enclosing a rotation space for the trigger wheel to rotate with the casing, it is beneficial to ensure the smoothness of the air flow in the rotation space when the trigger wheel rotates in the rotation space, thereby achieving the purpose of reducing the energy consumption when the stator assembly drives the trigger wheel to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the motor liquid cooling and heat dissipation system shown in the present invention;

[0022] Figure 2 is Figure 1 a schematic cross-sectional view of the motor of the motor liquid cooling and heat dissipation system described above;

[0023] Figure 3 is Figure 2 an enlarged schematic view of part A of the motor described above;

[0024] Figure 4 is Figure 1 a schematic structural diagram of the circulation device of the motor liquid cooling and heat dissipation system described above;

[0025] Figure 5 is Figure 4 a schematic structural diagram of the trigger wheel of the circulation device described above;

[0026] Figure 6 is Figure 5 an exploded schematic view of the trigger wheel described above;

[0027] Figure 7 for Figure 5 A schematic cross-sectional view of the follower wheel of the trigger wheel;

[0028] Figure 8 for Figure 4 A schematic structural diagram of the pump mechanism of the circulation device;

[0029] Figure 9 for Figure 8 A cross-sectional schematic diagram of the pumping mechanism;

[0030] Figure 10 for Figure 9 An enlarged schematic diagram of part B of the pump mechanism;

[0031] Figure 11 for Figure 9 An enlarged schematic diagram of part C of the pump mechanism;

[0032] Figure 12 for Figure 11 A schematic structural diagram of the reset member of the pump fluid assembly.

[0033] The meanings of the numbers in the accompanying drawings are:

[0034] 100. Electric motor liquid cooling system;

[0035] 10. Motor; 11. Casing; 111. Cooling area; 112. Heat dissipation area; 113. Heat dissipation port; 114. Embedded slot; 115. Rotating space; 12. Stator assembly; 13. Rotor assembly;

[0036] 20. Liquid reservoir;

[0037] 30. Circulation device; 31. Trigger wheel; 311. Follower wheel; 312. Trigger head; 313. Mounting hole; 314. Fixing hole; 315. Connecting part; 316. Contact part; 317. Limiting hole; 318. Contact surface; 32. Pumping mechanism; 33. Cooling cover; 35. Pumping chamber; 351. Liquid inlet; 352. Liquid storage chamber; 353. Pressurizing chamber; 354. Liquid outlet; 355. Pumping shell; 356, pump cover; 357, partition; 36, pump assembly; 361, pump sleeve; 362, reset member; 363, pressurized space; 364, pressure block; 365, spring; 366, adapter; 367, resistance; 368, protective sheet; 37, check valve; 371, valve cover; 372, ball valve; 373, spring; 374, liquid inlet; 375, flow channel; 376, liquid outlet;

[0038] 40. Liquid pump;

[0039] 50. Cooler. DETAILED DESCRIPTION

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0046] As Figure 1 shown, it is the motor liquid cooling and heat dissipation system 100 shown in the present invention.

[0047] As Figures 1 to 2 shown, the motor liquid cooling and heat dissipation system 100 includes: a motor 10, a liquid storage device 20, a circulation device 30, a liquid pump 40 and a cooler 50. Among them, the motor 10 includes a housing 11, a stator assembly 12 and a rotor assembly 13. Please refer to Figure 3 for reference Figure 4 , the circulation device 30 includes a trigger wheel 31, a liquid pumping mechanism 32 and a cooling cover 33. The trigger wheel 31 is installed on the rotor assembly 13 and is driven to rotate by the rotation assembly. The liquid pumping mechanism 32 is installed on the housing 11 and is triggered by the trigger wheel 31. The cooling cover 33 is covered on the housing 11 and is communicated with the liquid pumping mechanism 32. Among them, the rotor assembly 13 drives the trigger wheel 31 to rotate to drive the liquid pumping mechanism 32 to pump the coolant provided by the cooler 50 into the cooling cover 33. By using the trigger wheel 31 installed on the rotor assembly 13 to trigger the liquid pumping mechanism 32 to pump the coolant into the cooling cover 33 covered on the housing 11, it is beneficial for the rotor assembly 13 to provide power for the trigger wheel 31, and the liquid pumping mechanism 32 is driven by the trigger wheel 31 to pump liquid, so as to ensure that the liquid pumping efficiency of the liquid pumping mechanism 32 is proportional to the rotation speed of the rotor assembly 13, and the circulation efficiency of the coolant matches the heating degree of the motor 10, achieving the purpose of improving the cooling effect of the liquid cooling and heat dissipation system on the motor 10.

[0048] Below, in combination with Figures 1 to 12, a further description is given to the above-mentioned motor liquid cooling and heat dissipation system 100.

[0049] As Figures 1 to 2 shown, the housing 11 has a cooling area 111 and a heat dissipation area 112. The cooling area 111 is covered by the cooling cover 33, and the heat dissipation area 112 is provided with a heat dissipation port 113. Through the heat dissipation port 113, it is beneficial to quickly dissipate the heat generated by the rotor assembly 13 from the housing 11. At the same time, the coolant in the cooling cover 33 at the heat dissipation area 112 quickly takes away the temperature on the surface of the housing 11, thereby effectively dissipating heat from the entire housing 11 and the stator assembly 12 and rotor assembly 13 inside the housing 11, achieving the purpose of effectively improving the heat dissipation effect of the motor liquid cooling and heat dissipation system 100.

[0050] In order to reduce the energy consumption of the rotor assembly 13 during rotation, as Figure 3 shown, the housing 11 is provided with an embedded groove 114. The liquid pumping mechanism 32 is installed in the embedded groove 114 and encloses a rotation space 115 for the driving wheel 31 to rotate with the housing 11. Among them, the rotation space 115 is circularly arranged. By installing the liquid pumping mechanism 32 through the embedded groove 114 so that the liquid pumping mechanism 32 and the housing 11 enclose a circular rotation space 115 for the driving wheel 31 to rotate, it is beneficial to effectively guide the airflow generated during the rotation of the driving wheel 31 to separate or generate eddy currents in the rotation space 115, making the airflow flow more smoothly over the surface of the driving wheel 31, thereby effectively reducing the resistance and interference of the airflow to the driving wheel 31, achieving the purpose of reducing the energy consumption of the rotor assembly 13 during rotation.

[0051] In order to reduce the maintenance cost of the driving wheel 31, as Figure 3 shown, the driving wheel 31 includes a follower wheel 311 and a driving head 312. The follower wheel 311 is installed on the rotor assembly 13 and is provided with a mounting hole 313. As Figures 5 to 7 shown, the driving head 312 is detachably connected to the mounting hole 313 and drives the liquid pumping mechanism 32 to actuate. Among them, by adopting the way that the follower wheel 311, the driving head 312 and the mounting hole 313 are detachably connected, it is beneficial to avoid replacing the follower wheel 311 by replacing the driving head 312, achieving the purpose of reducing the maintenance cost of the driving wheel 31.

[0052] Among them, please combine Figure 3 and refer to Figures 5 to 7 , the follower wheel 311 is provided with a fixing hole 314. The fixing hole 314 is D-shaped and sleeved with the rotor assembly 13. As Figure 6 shown, the driving head 312 includes a connecting portion 315 and a contact portion 316. The connecting portion 315 is connected to the mounting hole 313, and the contact portion 316 contacts the liquid pumping mechanism 32.

[0053] In order to improve the contact accuracy of the contact head 312, please refer to Figure 6 reference Figure 7 , the follower wheel 311 is further provided with a limiting hole 317, a part of the contact portion 316 is arranged in the limiting hole 317, and the support strength of the contact portion 316 can be effectively increased through the limiting hole 317, so as to achieve the purpose of improving the contact accuracy of the contact head 312.

[0054] In order to improve the service life of the contact head 312, specifically, as Figures 5 to 6 shown, the contact portion 316 has a contact surface 318 that contacts the liquid pumping mechanism 32, and the contact surface 318 is arranged in a hemispherical shape. When the contact portion 316 arranged in a hemispherical shape contacts the liquid pumping mechanism 32, it is beneficial to avoid direct impact with the liquid pumping mechanism 32, thereby effectively reducing the wear of the contact portion 316 and the liquid pumping mechanism 32, so as to achieve the purpose of improving the service life of the contact head 312.

[0055] In order to improve the liquid pumping stability of the liquid pumping mechanism 32, as Figures 8 to 9 shown, the liquid pumping mechanism 32 includes a liquid pumping chamber 35, a liquid pumping assembly 36 and a check valve 37. The liquid pumping chamber 35 has a liquid inlet 351, a liquid storage chamber 352, a pressurizing chamber 353 and a liquid outlet 354 that are sequentially communicated. The liquid pumping assembly 36 is installed on the liquid pumping chamber 35. The liquid pumping assembly 36 is used to be touched by the touch wheel 31 to pump the coolant 40 in the pressurizing chamber 353 into the liquid outlet 354. The check valve 37 is arranged between the liquid storage chamber 352 and the pressurizing chamber 353 and is used to block the coolant in the pressurizing chamber 353 from flowing back into the liquid storage chamber 352. Among them, as Figure 9 shown, the liquid pumping chamber 35 includes a liquid pumping housing 355, a liquid pumping cover 356 and a partition 357. The liquid pumping housing 355 is provided with the liquid inlet 351 and the liquid outlet 354. The liquid pumping cover 356 closes the chamber housing. The partition 357 is fixedly connected to the liquid pumping cover 356 and divides the inside of the liquid pumping housing 355 into the liquid storage chamber 352 and the pressurizing chamber 353. The liquid pumping assembly 36 is installed on the liquid pumping cover 356, and the check valve 37 is installed on the partition 357. The check valve 37 is a one-way valve. Specifically, as Figure 10As shown in the figure, the check valve 37 includes a valve cover 371, a ball valve 372 and a spring 373. The valve cover 371 is provided with a liquid inlet hole 374, a flow channel 375 and a liquid outlet hole 376 that are sequentially communicated. The liquid inlet hole 374 is communicated with the liquid storage cavity 352, and the liquid outlet hole 376 is communicated with the pressurizing cavity 353. The ball valve 372 is arranged in the flow channel 375, and the spring 373 is used to provide the elastic force for the ball valve 372 to close the liquid inlet hole 374. By using the liquid pumping assembly 36 of the liquid pumping mechanism 32 to pump the coolant in the pressurizing cavity 353 into the liquid outlet 354, the method of arranging the check valve 37 between the liquid storage cavity 352 and the pressurizing cavity 353 helps to prevent the coolant from flowing back from the pressurizing cavity 353 into the liquid storage cavity 352 during the process of pressurizing the pressurizing cavity 353 by the liquid pumping assembly 36, achieving the purpose of effectively improving the liquid pumping stability of the liquid pumping mechanism 32.

[0056] In order to improve the liquid pumping efficiency of the liquid pumping mechanism 32, as Figure 9 shown in the figure, the volume of the pressurizing cavity 353 is smaller than the volume of the liquid storage cavity 352. By using the method that the volume of the pressurizing cavity 353 is smaller than the volume of the liquid storage cavity 352, when the check valve 37 is closed, the pressurizing effect of the liquid pumping assembly 36 on the pressurizing cavity 353 can be effectively increased, and at the same time, the coolant can be effectively stored in the liquid storage cavity 352. When the check valve 37 is opened, due to the pressure difference between the liquid storage cavity 352 and the pressurizing cavity 353, the coolant in the liquid storage cavity 352 can be quickly pumped into the pressurizing cavity 353, achieving the purpose of improving the liquid pumping efficiency of the liquid pumping mechanism 32.

[0057] In order to improve the circulation efficiency of the coolant, as Figures 8 to 9 shown in the figure, the number of the liquid pumping assemblies 36 is two. One of the liquid pumping assemblies 36 is arranged corresponding to the pressurizing cavity 353, and the other liquid pumping assembly 36 is arranged corresponding to the liquid storage cavity 352. By using the method of arranging the liquid pumping assembly 36 at the position corresponding to the liquid storage cavity 352, it is beneficial to apply pressure to the liquid storage cavity 352 through the liquid pumping assembly 36 to accelerate the coolant in the liquid storage cavity 352 to enter the pressurizing cavity 353 through the check valve 37, thereby accelerating the speed of the coolant in the liquid storage cavity 352 flowing into the pressurizing cavity 353, achieving the purpose of improving the circulation efficiency of the coolant.

[0058] It can be understood that, in order to improve the liquid pumping efficiency of the liquid pumping assembly 36, as Figure 3As shown, when one of the liquid pumping assemblies 36 contacts the actuating wheel 31, the other liquid pumping assembly 36 separates from the actuating wheel 31. That is, the number of the actuating heads 312 of the actuating wheel 31 can be multiple. Through the multiple actuating heads 312, the actuating frequency of the liquid pumping assembly 36 can be effectively increased, thereby improving the circulation efficiency of the coolant. However, the angles formed by the adjacent actuating heads 312 and the rotor assembly 13 are arranged out of alignment with the angles formed by the two liquid pumping assemblies 36 and the rotor assembly 13. That is, each actuating head 312 avoids simultaneously actuating the two liquid pumping assemblies 36 to prevent excessive pressure in the liquid pumping chamber 35 and avoid the situation of coolant backflow. Therefore, in the present invention, the number of the actuating heads 312 of the actuating wheel 31 is designed to be two, and the two actuating heads 312 are respectively arranged on the opposite sides of the follower wheel 311.

[0059] Please refer to Figure 9 for reference Figure 11 , the liquid pumping assembly 36 includes a liquid pumping sleeve 361 and a reset member 362. The liquid pumping sleeve 361 is installed on the liquid pumping chamber 35. The liquid pumping sleeve 361 has a pressurizing space 363 communicating with the pressurizing chamber 353. The reset member 362 is used to drive the pressurizing space 363 to reset. Among them, the liquid pumping sleeve 361 is a silica gel sleeve. The silica gel sleeve has excellent elasticity, can be stretched and deformed to a certain extent, and can quickly return to its original state, is not easy to break or deform, which is beneficial to the long-term and rapid liquid pumping work of the liquid pumping sleeve 361. The actuating wheel 31 squeezes the liquid pumping sleeve 361 to pump the coolant 40 in the pressurizing space 363 into the liquid pumping chamber 35.

[0060] Please refer to Figure 11 for reference Figure 12 , the reset member 362 includes a pressing block 364 and a spring piece 365. The pressing block 364 is arranged in the pressurizing space 363 and abuts against the liquid pumping sleeve 361. The spring piece 365 is installed on the liquid pumping chamber 35 and is used to provide the elastic force between the pressing block 364 and the liquid pumping sleeve 361. Among them, the material of the spring piece 365 is spring 373 steel. The spring piece 365 made of spring 373 steel can withstand a large external force and maintain good elastic deformation ability. After the force disappears, it can quickly return to its original shape, ensuring that the spring piece 365 can accurately realize the elastic function during the working process. Moreover, under the condition of repeatedly bearing alternating loads, it has a high ability to resist fatigue failure, enabling the spring piece 365 to maintain stable performance during long-term use.

[0061] In order to ensure that the liquid pumping sleeve 361 can still effectively realize the liquid pumping function when the actuating wheel 31 rotates at a high speed, as Figure 12As shown, the briquetting block 364 includes a transfer part 366 and a contact part 367. The transfer part 366 is connected to the elastic piece 365, and the contact part 367 abuts against the liquid pumping sleeve 361. Specifically, the transfer part 366 is strip-shaped, and the contact part 367 is arc-shaped and has a fixed section and a swing section. The fixed section is connected to the transfer part 366, and the number of swing sections is two, which are distributed on both sides of the fixed section opposite to each other. When the liquid pumping sleeve 361 is squeezed by the trigger wheel 31 to cause the compression deformation of the pressurizing space 363, the swing section is deformed by force to absorb part of the impact force during the deformation of the liquid pumping sleeve 361. When the pressurizing space 363 of the liquid pumping sleeve 361 is reset, the swing section is stretched by the loss of force and abuts against the liquid pumping sleeve 361, so that the pressurizing space 363 of the liquid pumping sleeve 361 can be quickly restored, so that the pressurizing space 363 can be quickly contracted and restored in a short time, so as to achieve the purpose that the liquid pumping sleeve 361 can still effectively realize the liquid pumping function when the trigger wheel 31 is running at high speed.

[0062] In order to improve the overall operation stability of the liquid pumping assembly 36, as Figure 11 shown, the liquid pumping assembly 36 further includes a protection piece 368. The protection piece 368 is installed on the liquid pumping chamber 35 and is arranged between the liquid pumping sleeve 361 and the trigger wheel 31. Among them, the material of the protection piece 368 is C17200 beryllium copper. C17200 beryllium copper includes cobalt, nickel and beryllium, and the content of beryllium is 1.90%-2.15%. By using the high strength and high wear resistance of C17200 beryllium copper, when using C17200 beryllium copper as the protection piece 368 during the contact with the trigger wheel 31, the wear of the liquid pumping sleeve 361 can be effectively avoided, thereby improving the service life of the liquid pumping sleeve 361. Moreover, by using the high elasticity, non-magnetic and non-sparking impact performance of C17200 beryllium copper, during the contact between the protection piece 368 and the trigger wheel 31, the highly elastic protection piece 368 can not only effectively provide a recovery space for the liquid pumping sleeve 361, but also avoid generating sparks during the rapid contact with the wheel when the rotor assembly 13 rotates at high speed, thereby protecting the operation safety inside the motor 10 and achieving the purpose of improving the overall operation stability of the liquid pumping assembly 36.

[0063] When the motor liquid cooling and heat dissipation system 100 described in the present invention is in use: the liquid pump 40 and the motor 10 are started. The liquid pump 40 pumps the coolant in the liquid storage device 20 into the liquid pumping mechanism 32 of the circulation device 30, and successively flows through the liquid inlet 351, the liquid storage chamber 352, the pressurizing chamber 353 and the liquid outlet 354 of the liquid pumping chamber 35. The coolant is sent into the cooling cover 33 through the liquid outlet 354. The rotor assembly 13 of the motor 10 rotates and drives the trigger wheel 31 to rotate, so that the trigger head 312 of the trigger wheel 31 successively contacts the protection piece 368 of the liquid pumping assembly 36 provided at the corresponding liquid storage chamber 352 and the corresponding pressurizing chamber 353. When the trigger head 312 contacts the protection piece 368 of the liquid pumping assembly 36 at the liquid storage chamber 352, it pushes the protection piece 368 to squeeze the liquid pumping sleeve 361 at the liquid storage chamber 352, so that the pressurizing space 363 of the liquid pumping sleeve 361 is compressed, and the coolant in the pressurizing space 363 is pressed into the liquid storage chamber 352. The coolant in the liquid storage chamber 352 is pressed through the check valve 37 into the pressurizing chamber 353. When the trigger head 312 moves away from the liquid pumping assembly 36 at the liquid storage chamber 352, the reset member 362 of the liquid pumping assembly 36 at the liquid storage chamber 352 is reset, the pressurizing space 363 is restored and sucks in the coolant. When the trigger head 312 contacts the protection piece 368 of the liquid pumping assembly 36 at the pressurizing chamber 353, the liquid pumping sleeve 361 squeezes the pressurizing chamber 353 through the compression of the pressurizing space 363. The coolant in the pressurizing chamber 353 is blocked by the check valve 37 and squeezes the coolant out of the liquid outlet 354. When the trigger head 312 moves away from the liquid pumping assembly 36 at the pressurizing chamber 353, the reset member 362 at the pressurizing chamber 353 is reset, the pressurizing space 363 of the liquid pumping sleeve 361 is restored and sucks in the coolant in the liquid storage chamber 352 through the check valve 37. After the coolant flows out from the cooling cover 33, it is cooled by the cooler 50 and then returns to the liquid storage device 20 again, and is transported to the liquid pumping mechanism 32 by the liquid supply pump 40, so as to circulate with the rotation speed of the stator assembly 12, so as to increase the circulation rate of the coolant and achieve the purpose of improving the cooling effect of the liquid cooling and heat dissipation system on the motor 10.

[0064] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0065] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A liquid cooling system for an electric motor, comprising a motor, a circulation device, a liquid pump and a cooler, wherein the motor comprises a housing, a stator assembly and a rotor assembly, and is characterized in that: The circulation device includes a trigger wheel installed on the rotor assembly and driven to rotate by the rotating assembly, a pumping mechanism installed on the casing and triggered by the trigger wheel, and a cooling cover covered on the casing and connected to the pumping mechanism, wherein the rotor assembly drives the trigger wheel to rotate to drive the pumping mechanism to pump the coolant provided by the cooler into the cooling cover.

2. The electric motor liquid cooling and heat dissipation system according to claim 1, characterized in that: The pumping mechanism includes a pumping chamber having a connected liquid inlet, a liquid storage chamber, a pressurizing chamber and a liquid outlet, a pumping assembly for being triggered by the trigger wheel to pump the coolant in the pressurizing chamber into the liquid outlet, and a check valve arranged between the liquid storage chamber and the pressurizing chamber to prevent the coolant in the pressurizing chamber from flowing back into the liquid storage chamber.

3. The electric motor liquid cooling and heat dissipation system according to claim 2, characterized in that: The volume of the pressurizing chamber is smaller than the volume of the liquid storage chamber.

4. The electric motor liquid cooling and heat dissipation system according to claim 2, characterized in that: There are two pumping components, one of which is arranged corresponding to the pressurizing chamber, and the other pumping component is arranged corresponding to the liquid storage chamber.

5. The electric motor liquid cooling and heat dissipation system according to claim 2, characterized in that: The pump fluid assembly includes a pump fluid jacket installed on the pump fluid chamber, the pump fluid jacket having a pressurized space connected to the pressurized cavity, and a reset member driving the pressurized space to reset, wherein the trigger wheel squeezes the pump fluid jacket and pumps the coolant in the pressurized space into the pump fluid chamber.

6. The electric motor liquid cooling and heat dissipation system according to claim 5, characterized in that: The pumping liquid component also includes a protection sheet installed on the pumping liquid chamber and arranged between the pumping liquid sleeve and the trigger wheel.

7. The electric motor liquid cooling and heat dissipation system according to claim 5, characterized in that: The reset member includes a pressure block disposed in the pressurized space and abutting against the pump fluid sleeve, and a spring sheet installed on the pump fluid chamber and providing elastic force between the pressure block and the pump fluid sleeve.

8. The electric motor liquid cooling and heat dissipation system according to claim 1, characterized in that: The trigger wheel includes a follower wheel and a trigger head. The follower wheel is mounted on the rotor assembly and is provided with a mounting hole. The trigger head is detachably connected to the mounting hole and drives the pump mechanism to operate.

9. The electric motor liquid cooling and heat dissipation system according to claim 1, characterized in that: The housing has a cooling area and a heat dissipation area. The cooling area is covered by the cooling cover, and the heat dissipation area is provided with a heat dissipation port.

10. The electric motor liquid cooling and heat dissipation system according to claim 1, characterized in that: The housing is provided with an embedding groove, the pump mechanism is installed in the embedding groove, and together with the housing, forms a rotating space for the trigger wheel to rotate.

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