Liquid cooling circulation type motor pump body for vehicle

Abstract

The invention relates to the technical field of vehicle motors, and discloses a liquid cooling circulation type vehicle motor pump body which comprises a motor body, an impeller rotor assembly, a supporting assembly, a cooling liquid stirring assembly, a cooling liquid collecting assembly, a circulating pump, a backflow pipe and other components. A front-end impeller of the impeller rotor assembly is located in the cooling box, the rear end of the impeller rotor assembly extends to a motor inner cavity and is supported by the supporting assembly, and a rotor shaft sleeve is provided with a cooling liquid circulation groove for guiding in cooling liquid; the cooling liquid stirring assembly synchronously rotates along with the impeller rotor, and cooling liquid is evenly distributed through stirring blades. A monitoring assembly is arranged in the cooling liquid collecting assembly, the liquid level is detected through a pressure sensor, and a circulating pump is linked to start and stop intelligently. Through the design of integrated shunting, active stirring and pressure-liquid level linkage control, the problems of uneven cooling, low circulation efficiency, easy leakage and the like of traditional liquid cooling are solved, and comprehensive and uniform cooling of the motor is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle motor, and particularly relates to a liquid cooling circulation type vehicle motor pump body. BACKGROUND

[0002] With the transformation of the global automobile industry to "electrification, intelligentization and light weight", the technical iteration speed of vehicle motor is significantly accelerated. The demand for power density of motor of new energy vehicles (especially pure electric vehicles and hybrid electric vehicles) continues to increase. The power of mainstream vehicle motor has been upgraded from 50-80kW in the early stage to 150-250kW, and the power of some high-performance vehicles even breaks through 400kW. The rotation speed of motor has also increased from 10000rpm to 15000-20000rpm. Under this background, the heat generation of motor increases exponentially. According to the industry test data, the heat generation of a vehicle motor with a power of 200kW can reach 8-12kW per hour when it is running at full load. If it cannot be cooled in time and effectively, it will directly cause a series of technical problems.

[0003] With the continuous increase of power and rotation speed of vehicle motor, its heat generation also increases. The overheating of motor will cause the decline of insulation performance and the acceleration of winding aging, which seriously affects the performance and service life of motor. At present, the common cooling methods of vehicle motor include air cooling and liquid cooling. The air cooling method has low cooling efficiency and cannot meet the cooling demand of high-power motor. Although the traditional liquid cooling method has high cooling efficiency, it has the problem of uneven distribution of cooling medium. For example, in some liquid cooling systems, the cooling medium only flows on the surface of the motor and cannot deeply enter the inner cavity of the motor for overall cooling. Therefore, a new type of liquid cooling circulation type vehicle motor pump body is urgently needed to solve the problems of the prior art. SUMMARY

[0004] In view of the above problems existing in the prior art, the purpose of the present application is to provide a liquid cooling circulation type vehicle motor pump body, which solves the problems of uneven distribution of cooling medium and existence of heat dissipation dead angle in the traditional liquid cooling method, and realizes overall and uniform cooling of each heat generating component in the motor.

[0005] The present application adopts the following technical scheme: a liquid cooling circulation type vehicle motor pump body, comprising a motor main body, an impeller rotor assembly, a support assembly, a cooling liquid stirring assembly, a cooling liquid return female connector, a sealing connector, a cooling liquid collecting assembly, a circulating pump and a return pipe; The motor main body and the circulating pump are both installed on the outer wall of the automobile cooling box, the front end impeller of the impeller rotor assembly is located in the automobile cooling box, the rear end extends into the inner cavity of the motor main body and is rotatably supported through the support assembly, so that the cooling liquid in the automobile cooling box can enter the inner cavity of the motor main body through the impeller rotor assembly; The cooling liquid stirring assembly is sleeved at the tail end of the impeller rotor assembly, and is provided with a gap with the side wall of the inner cavity of the motor body and the supporting assembly, and when the impeller rotor assembly rotates, the cooling liquid stirring assembly rotates synchronously to stir the cooling liquid entering the inner cavity of the motor body. The cooling liquid return female joint is installed at the bottom of the motor body, and the two ends of the sealing connector are respectively connected with the cooling liquid return female joint and the cooling liquid collecting assembly. The cooling liquid collecting assembly is connected with the input end of the circulating pump through the return pipe, and the output end of the circulating pump is communicated with the liquid return port of the automobile cooling box.

[0006] As a further improvement of the above-mentioned scheme, the impeller rotor assembly comprises a front-end impeller, a middle rotor core and a rear-end hollow shaft, an inner cavity of the rear-end hollow shaft is provided with a rotor shaft sleeve in interference fit, and a plurality of groups of cooling liquid flow-through grooves are uniformly arranged on the inner cavity side wall of the rotor shaft sleeve along the axial direction.

[0007] As a further improvement of the above-mentioned scheme, the supporting assembly comprises a rotor support shaft and a limiting stopper, and the rotor support shaft is integrally arranged on the front side of the limiting stopper, one end of the rotor support shaft is inserted into the inner cavity of the rotor shaft sleeve, and a plurality of groups of cooling liquid flow-through channels are uniformly arranged on the outer wall of the limiting stopper along the circumferential direction.

[0008] As a further improvement of the above-mentioned scheme, the cooling liquid stirring assembly comprises a fixed sleeve, stirring blades, a threaded sleeve and a fixed screw. The inner diameter of the fixed sleeve is matched with the outer diameter of the tail end of the impeller rotor assembly, the stirring blades are uniformly arranged on the outer side wall of the fixed sleeve and integrally injection molded with the fixed sleeve, the threaded sleeve is embedded along the circumferential direction of the fixed sleeve and staggered with the stirring blades, and the fixed screw is installed in the threaded sleeve in threaded connection and abuts against the outer wall of the tail end of the impeller rotor assembly to be fixed.

[0009] As a further improvement of the above-mentioned scheme, the cooling liquid collecting assembly comprises a collecting top box, a collecting bottom box and a monitoring assembly. The collecting top box and the collecting bottom box are fixedly connected by screws, the collecting top box is provided with a cooling liquid return sub-joint at the top, the collecting bottom box is provided with a pipe connector at the bottom, and the inner cavity of the collecting bottom box is provided with U-shaped clamping grooves.

[0010] As a further improvement of the above-mentioned scheme, the monitoring assembly comprises a cross-shaped supporting frame, a guide rod, a plugging ball, a compression spring and a pressure sensor. The cross-shaped supporting frame is clamped between the U-shaped clamping grooves, a through hole is arranged in the middle of the cross-shaped supporting frame, the guide rod is vertically installed in the inner part of the through hole of the cross-shaped supporting frame, the plugging ball is installed at the top end of the guide rod, the compression spring is sleeved on the outer wall of the guide rod and located between the plugging ball and the cross-shaped supporting frame, and the pressure sensor is installed at the bottom end of the guide rod.

[0011] As a further improvement of the above scheme, a threaded hole is formed in the bottom of the motor body, and the cooling liquid return female joint is installed in the threaded hole by threaded sealing, the upper end of the sealing joint is connected with the return female joint by threads, the lower end is connected with the cooling liquid return sub-joint of the cooling liquid collecting assembly by threads, and the inner cavity of the sealing joint is in a through structure.

[0012] As a further improvement of the above scheme, the two ends of the return pipe are connected with the input end of the circulating pump and the pipe joint of the collecting bottom box by clamps respectively, and the data output end of the pressure sensor, the control end of the motor body and the circulating pump are connected with the vehicle-mounted computer.

[0013] Compared with the prior art, the present application has the following advantages: The present application adds a cooling liquid stirring assembly that rotates synchronously with the impeller rotor assembly, and forms a turbulent flow through the stirring blades, thereby solving the problem of uneven distribution of cooling liquid in the traditional liquid cooling method and ensuring comprehensive and uniform heat exchange of each heating component in the motor; The cooling liquid collecting assembly of the present application is provided with a normally closed blocking structure and a pressure sensor, which indirectly reflects the liquid level by monitoring the static pressure of the cooling liquid, thereby realizing intelligent start and stop of the circulating pump, avoiding idling or overload operation of the circulating pump, reducing energy consumption and improving system reliability; The impeller rotor assembly of the present application integrates a front end impeller, a middle rotor core and a rear end hollow shaft, the cooling liquid is directly introduced into the motor cavity through the cooling liquid flow channel of the rotor shaft sleeve, and a shunt structure is designed to realize collaborative cooling of multiple components of the vehicle, thereby simplifying the layout of the cooling system pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a three-dimensional perspective view of the liquid-cooled circulating motor pump body from the top direction of the present application; Figure 2 Fig. 2 is a cross-sectional view of the liquid-cooled circulating motor pump body in the A-A direction of the present application; Figure 3 Fig. 3 is a three-dimensional perspective view of the liquid-cooled circulating motor pump body from the bottom direction of the present application; Figure 4 Fig. 4 is a display diagram of the cooling liquid stirring assembly of the liquid-cooled circulating motor pump body installed on the impeller rotor assembly of the present application; Figure 5 Fig. 5 is a side view of the impeller rotor assembly of the liquid-cooled circulating motor pump body of the present application; Figure 6 Fig. 6 is a three-dimensional perspective display diagram of the motor body of the liquid-cooled circulating motor pump body of the present application and a cross-sectional view in the B-B direction; Figure 7 Fig. 7 is a three-dimensional perspective display diagram of the cooling liquid stirring assembly of the liquid-cooled circulating motor pump body of the present application; Figure 8 Figure 3 is a three-dimensional perspective view of a cooling liquid collection assembly of the liquid cooling circulation type motor pump body for vehicles according to the present application; Figure 9 Figure 4 is a three-dimensional perspective view of a monitoring assembly of the liquid cooling circulation type motor pump body for vehicles according to the present application.

[0015] Main symbol explanation: 1, motor main body; 2, impeller rotor assembly; 21, rotor shaft sleeve; 22, cooling liquid flow channel; 3, support assembly; 31, rotor support shaft; 32, limit stop; 33, cooling liquid flow passage; 4, cooling liquid stirring assembly; 41, fixed sleeve; 42, stirring blade; 43, threaded sleeve; 44, fixed screw; 5, cooling liquid return female connector; 6, sealing connector; 7, cooling liquid collection assembly; 71, collection top box; 711, cooling liquid return female connector; 72, collection bottom box; 721, pipe connector; 722, U-shaped clamping groove; 73, monitoring assembly; 731, cross support frame; 732, guide rod; 733, plugging ball; 734, compression spring; 735, pressure sensor; 8, circulating pump; 9, return pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure.

[0017] Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall be understood as the usual meaning understood by those of ordinary skill in the art to which the present disclosure belongs. The "includes" or "contains" and similar words used in the present disclosure mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The "connection" or "connection" and similar words are not limited to physical or mechanical connection, but can also include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits the detailed description of known functions and known components.

[0020] Please combine Figures 1-9As shown, the embodiment of the present application provides a liquid cooling circulating motor pump body for vehicle, which comprises a motor body 1, an impeller rotor assembly 2 and a circulating pump 8, wherein the motor body 1 and the circulating pump 8 are both installed on the outer wall of the automobile cooling box (the automobile cooling box adopts the standard cooling box for vehicle in the prior art, and the specific structure is not described again, and the automobile cooling box is not shown in the figure) through bolts, and a nitrile rubber sealing ring (type: O-ring) is arranged between the connecting surfaces of the motor body 1 and the circulating pump 8 to ensure the sealing performance and prevent the leakage of the cooling medium. The impeller rotor assembly 2 is a core component for power output and cooling liquid delivery, which is used to drive the circulation of the cooling liquid and realize the power transmission of itself. The front end impeller of the impeller rotor assembly 2 is arranged in the inside of the automobile cooling box, and a gap of 3-5 mm is reserved between the impeller and the inner wall of the automobile cooling box to avoid friction between the impeller and the inner wall of the automobile cooling box when the impeller rotates. The rear end of the impeller rotor assembly 2 extends to the inner cavity of the motor body 1 and is rotatably supported through a support assembly 3. In order to solve the problem that the traditional cooling method exists uneven distribution of the cooling medium during the operation of the motor for vehicle, which leads to the local temperature of the motor being too high and easily causes the overload failure of the motor, the present application has the following beneficial effects: Figures 1-6 As shown, the impeller rotor assembly 2 comprises a front end impeller, a middle rotor core and a rear end hollow shaft. The inner cavity of the rear end hollow shaft forms a tail end inner cavity. A rotor shaft sleeve 21 is installed in the tail end inner cavity in an interference fit. The rotor shaft sleeve 21 is made of 45# steel material. A plurality of cooling liquid flow-through grooves 22 are uniformly arranged on the inner cavity side wall of the rotor shaft sleeve 21 in the axial direction (three groups are arranged in the present scheme, which are uniformly distributed in the circumferential direction at an angle of 120°). By arranging the cooling liquid flow-through grooves 22, the cooling liquid in the automobile cooling box can smoothly enter the inner cavity of the motor body 1 to cool and cool the windings, the core and other components in the motor body 1, so that the overload phenomenon of the motor body 1 caused by the high-speed rotation and heating of the impeller rotor assembly 2 in the inner cavity of the motor body 1 is avoided, The support assembly 3 is arranged in the inner cavity of the motor body 1 and is used to position and support the impeller rotor assembly 2 in the radial and axial directions to ensure the coaxiality and stability of the impeller rotor assembly 2 during high-speed rotation. The specific structure is as shown in Figure 6 As shown, the support assembly 3 comprises a rotor support shaft 31 and a limiting stopper 32. The rotor support shaft 31 and the limiting stopper 32 are an integral whole, and the limiting stopper 32 is fixedly connected with the rear end of the motor body 1. One end of the rotor support shaft 31 is inserted into the inner cavity of the rotor shaft sleeve 21 of the impeller rotor assembly 2. A deep groove ball bearing (type: 6205) is arranged between the rotor support shaft 31 and the rotor shaft sleeve 21 to reduce the rotation friction. A plurality of cooling liquid flow-through channels 33 are uniformly arranged on the outer wall of the limiting stopper 32 in the circumferential direction. By arranging the cooling liquid flow-through channels 33, the cooling liquid entering through the cooling liquid flow-through grooves 22 can smoothly pass through the limiting stopper 32 and enter the deep part of the inner cavity of the motor body 1 (such as the winding gap, the stator assembly and other positions) to realize the overall cooling of the inside of the motor body 1; The cooling liquid stirring assembly 4 is sleeved on the tail end of the impeller rotor assembly 2, and gaps are reserved between the outer wall of the supporting assembly 3 and the inner cavity side wall of the motor body 1 to ensure that the cooling liquid stirring assembly 4 can rotate freely without interference when the impeller rotor assembly 2 rotates, as shown in Figure 4 and 7 The cooling liquid stirring assembly 4 includes a fixed sleeve 41 that can be sleeved on the tail end of the impeller rotor assembly 2. The fixed sleeve 41 is made of engineering plastic (model: PA66+GF30, with the characteristics of high strength, wear resistance and corrosion resistance of cooling liquid). The inner diameter of the fixed sleeve 41 matches the outer diameter of the tail end of the impeller rotor assembly 2. A plurality of stirring blades 42 are uniformly arranged on the outer side wall of the fixed sleeve 41. The fixed sleeve 41 and the stirring blades 42 are integrally injection molded to ensure the structural strength. A plurality of threaded sleeves 43 are uniformly embedded on the side wall of the fixed sleeve 41. The threaded sleeves 43 and the stirring blades 42 are arranged alternately. The fixed screw 44 is screwed in the inner cavity of the threaded sleeve 43. The inner end of the fixed screw 44 penetrates through the inner cavity of the threaded sleeve 43 and abuts against the outer wall of the tail end of the impeller rotor assembly 2. By tightening the fixed screw 44, the fixed sleeve 41 can be firmly fixed on the tail end of the impeller rotor assembly 2. When the impeller rotor assembly 2 rotates, the cooling liquid stirring assembly 4 rotates synchronously (at the same speed as the impeller rotor assembly 2, up to 6000 r / min). The stirring blades 42 stir the cooling liquid entering the inner cavity of the motor body 1, forming a turbulent flow effect, so that the cooling liquid can be uniformly distributed on the inner cavity side wall of the motor body 1, the stator winding and the stator core surface, avoiding uneven cooling in the inner cavity of the motor body 1. The cooling liquid return female connector 5 is sealingly screwed on the bottom of the motor body 1. The cooling liquid return female connector 5 is matched with a threaded hole in the bottom of the motor body 1. The sealing connector 6 is sealingly screwed on the bottom end of the cooling liquid return female connector 5. The cooling liquid collection assembly 7 is sealingly screwed on the bottom end of the sealing connector 6. The inner cavity of the sealing connector 6 is a through structure for sealingly connecting the cooling liquid return female connector 5 and the cooling liquid collection assembly 7, preventing leakage of the cooling liquid during the return process. The return pipe 9 is installed between the bottom end of the cooling liquid collection assembly 7 and the input end of the circulating pump 8 (the circulating pump 8 is a direct current brushless circulating pump for vehicles (model: DBP-12V-500) with a rated voltage of 12V, a rated flow of 5L / min and a rated head of 3m, with the characteristics of small size, low energy consumption and high reliability). The cooling liquid collection assembly 7 is used to collect the cooling liquid discharged from the motor body 1 and realize pressure and liquid level detection through the monitoring assembly to provide signals for the start-stop control of the circulating pump 8, as shown in Figures 8-9As shown, the cooling liquid collecting assembly 7 comprises a collecting top box 71, a collecting bottom box 72 and a monitoring assembly 73, and the specific structure is as follows: the collecting top box 71 and the collecting bottom box 72 are both made of aluminum alloy (model: 6061), the bottom end of the collecting top box 71 is inserted into the top inner cavity of the collecting bottom box 72 through transition fit, and the connecting part of the collecting top box 71 and the collecting bottom box 72 is uniformly provided with 4 groups of M5x10 screws in the circumferential direction, the fixed connection of the two is realized through the screws, and the connecting part is also provided with a silica rubber sealing gasket to ensure the sealing performance; the top of the collecting top box 71 is integrally formed with a cooling liquid return sub connector 711, the specification of the cooling liquid return sub connector 711 is matched with the lower end thread of the sealing connector 6, which is used for connecting with the sealing connector 6 to receive the return cooling liquid from the motor body 1; the bottom end of the collecting bottom box 72 is integrally formed with a pipe connector 721, which is used for connecting with the return pipe 9; the inner cavity of the collecting bottom box 72 is integrally formed with four U-shaped clamping grooves 722 on the four side walls, which are used for installing the monitoring assembly 73; the monitoring assembly 73 comprises a cross support frame 731, a guide rod 732, a plugging ball 733, a compression spring 734 and a pressure sensor 735: the cross support frame 731 is made of 304 stainless steel, the four end parts of which can be horizontally clamped between the four U-shaped clamping grooves 722 of the collecting bottom box 72, and a through hole is formed in the middle part of the cross support frame 731; the guide rod 732 is made of 45# steel, the upper end of which is installed in the through hole in the middle part of the cross support frame 731 to realize vertical fixation; the plugging ball 733 is made of nitrile rubber, the bottom of which is connected with the top end of the guide rod 732 through thread, and the top of the plugging ball 733 can be attached to the bottom opening of the cooling liquid return sub connector 711 to realize plugging; the compression spring 734 is made of spring steel (model: 65Mn), and the specification is: wire diameter 2mm, outer diameter 15mm, free length 30mm, and spring force 8-10N; the compression spring 734 is sleeved on the outer wall of the guide rod 732 and located between the plugging ball 733 and the cross support frame 731, and the top of the plugging ball 733 can be pressed tightly on the bottom of the cooling liquid return sub connector 711 by the spring force of the compression spring 734 to realize the plugging of the cooling liquid return sub connector 711; the pressure sensor 735 is a diffusion silicon pressure sensor (model: PT124G-210), the measurement range of which is 0-1MPa, and the accuracy level is 0.5 level; the pressure sensor 735 is installed at the bottom end of the guide rod 732 through thread, and the probe of the pressure sensor 735 faces downward, which is used for monitoring the pressure and liquid level state of the cooling liquid in the inner cavity of the collecting bottom box 72; the return pipe 9 is an oil-resistant rubber pipe with an inner diameter of 20mm and an outer diameter of 30mm, and the two ends are connected with the input end of the circulating pump 8 and the pipe connector 721 of the collecting bottom box 72 through clamps respectively; the data output end of the pressure sensor 735, the control end of the motor body 1 and the circulating pump 8 are all connected with the vehicle-mounted computer; Working process: the impeller rotor assembly 2 rotates at high speed under the drive of the motor body 1, the front end impeller pumps out the cooling liquid in the automobile cooling box, a part of the cooling liquid is directly used for cooling the internal components of the vehicle (such as the motor controller, the battery pack, etc.), and the other part of the cooling liquid enters the inner cavity of the motor body 1 through the cooling liquid flow channel 22 of the tail rotor shaft sleeve 21 of the impeller rotor assembly 2; The cooling liquid entering the inner cavity of the motor body 1 is uniformly distributed on the inner cavity side wall, winding and core surface of the motor body 1 under the stirring action of the cooling liquid stirring assembly 4, and the internal part of the motor body 1 is comprehensively cooled, and the cooling liquid after absorbing heat flows to the bottom of the motor body 1 under the action of gravity and pressure; When the pressure of the cooling liquid in the inner cavity of the motor body 1 is greater than the elastic force (8-10N) of the compression spring 734, the cooling liquid pushes the blocking ball 733 to move downward, the compression spring 734 is compressed, and the cooling liquid enters the inner cavity of the collection bottom box 72 through the cooling liquid return female connector 5, the sealing connector 6 and the cooling liquid return female connector 711; With the continuous entry of the cooling liquid into the collection bottom box 72, the liquid level in the inner cavity of the collection bottom box 72 gradually rises, when the liquid level submerges the probe of the pressure sensor 735, the pressure sensor 735 detects the pressure signal (at this time, the pressure value is about 0.3MPa), and transmits the signal to the vehicle computer; after receiving the signal, the vehicle computer controls the circulating pump 8 to start, and the circulating pump 8 sucks the cooling liquid collected in the inner cavity of the collection bottom box 72 back to the inside of the automobile cooling box through the return pipe 9, and completes a cooling liquid circulation; When the cooling liquid in the collection bottom box 72 is sucked to a liquid level lower than the probe of the pressure sensor 735, the pressure sensor 735 detects that the pressure signal disappears, and the vehicle computer controls the circulating pump 8 to stop working, at this time, the compression spring 734 restores to the original state, pushes the blocking ball 733 to move upward, reseals the cooling liquid return female connector 711, and waits for the next cycle.

[0021] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the protection scope of the present application.

Claims

1. A liquid-cooled circulating vehicle motor pump body, comprising a motor body (1), an impeller rotor assembly (2), a support assembly (3), a coolant agitation assembly (4), a coolant return female connector (5), a sealing connector (6), a coolant collection assembly (7), a circulating pump (8), and a return pipe (9); The motor body (1) and the circulating pump (8) are both installed on the outer wall of the car cooling box. The front impeller of the impeller rotor assembly (2) is located inside the car cooling box, and the rear end extends into the inner cavity of the motor body (1) and is rotatably supported by the support assembly (3), so that the coolant in the car cooling box can enter the inner cavity of the motor body (1) through the impeller rotor assembly (2). The coolant agitation component (4) is sleeved on the tail end of the impeller rotor assembly (2), with a gap reserved between it and the support assembly (3) and the inner wall of the motor body (1). When the impeller rotor assembly (2) rotates, the coolant agitation component (4) rotates synchronously to agitate the coolant entering the inner cavity of the motor body (1). The coolant return female connector (5) is installed at the bottom of the motor body (1). The two ends of the sealing connector (6) are respectively sealed to the coolant return female connector (5) and the coolant collection assembly (7). The coolant collection assembly (7) is connected to the input end of the circulation pump (8) through the return pipe (9). The output end of the circulation pump (8) is connected to the return port of the car coolant box.

2. The liquid-cooled circulating automotive motor pump body as described in claim 1, characterized in that, The impeller rotor assembly (2) includes a front impeller, a middle rotor core and a rear hollow shaft. The rear hollow shaft has a rotor bushing (21) installed in the inner cavity of the tail end with an interference fit. The inner cavity sidewall of the rotor bushing (21) has multiple sets of through coolant flow grooves (22) evenly opened along the axial direction.

3. The liquid-cooled circulating automotive motor pump body as described in claim 2, characterized in that, The support assembly (3) includes a rotor support shaft (31) and a limiting block (32), and the rotor support shaft (31) is integrally set on the front side of the limiting block (32). One end of the rotor support shaft (31) is inserted into the inner cavity of the rotor bushing (21). The outer wall of the limiting block (32) is evenly provided with multiple sets of coolant flow channels (33) along the circumference.

4. The liquid-cooled circulating automotive motor pump body as described in claim 2, characterized in that, The coolant agitation assembly (4) includes a fixed sleeve (41), stirring blades (42), threaded sleeve (43), and fixed screw (44). The inner diameter of the fixed sleeve (41) is adapted to the outer diameter of the tail end of the impeller rotor assembly (2). The stirring blades (42) are evenly arranged on the outer wall of the fixed sleeve (41) and are integrally injection molded with the fixed sleeve (41). The threaded sleeve (43) is embedded around the fixed sleeve (41) and is staggered with the stirring blades (42). The fixing screw (44) is installed in the threaded sleeve (43) by thread, and the inner end abuts against the outer wall of the tail end of the impeller rotor assembly (2) to achieve fixation.

5. The liquid-cooled circulating automotive motor pump body as described in claim 1, characterized in that, The coolant collection assembly (7) includes a top collection box (71), a bottom collection box (72), and a monitoring assembly (73). The top collection box (71) and the bottom collection box (72) are fixedly connected by screws. The top collection box (71) is provided with a coolant return sub-connector (711) at the top, and the bottom collection box (72) is provided with a pipe connector (721) at the bottom. The four walls of the inner cavity of the bottom collection box (72) are provided with U-shaped slots (722).

6. The liquid-cooled circulating automotive motor pump body as described in claim 5, characterized in that, The monitoring component (73) includes a cross support frame (731), a guide rod (732), a sealing ball (733), a compression spring (734), and a pressure sensor (735). The cross support frame (731) is fitted between the U-shaped slots (722), and a through hole is provided in the middle of the cross support frame (731). The guide rod (732) is vertically installed inside the through hole on the cross support frame (731). A sealing ball (733) is installed at the top of the guide rod (723). The compression spring (734) is sleeved on the outer wall of the guide rod (732) and is located between the sealing ball (733) and the cross support frame (731). The pressure sensor (735) is installed at the bottom of the guide rod (732).

7. The liquid-cooled circulating automotive motor pump body as described in claim 5, characterized in that, The motor body (1) has a threaded hole at the bottom, and the coolant return female connector (5) is installed in the threaded hole by thread sealing. The upper end of the sealing connector (6) is connected to the return female connector (5) by thread, and the lower end is connected to the coolant return sub-connector (711) on the coolant collection assembly (7) by thread. The inner cavity of the sealing connector (6) is a through structure.

8. The liquid-cooled circulating automotive motor pump body as described in claim 6, characterized in that, The two ends of the return pipe (9) are connected to the pipe connector (721) of the input end of the circulation pump (8) and the collection box (72) respectively by clamps. The data output end of the pressure sensor (735), the motor body (1) and the control end of the circulation pump (8) are all connected to the vehicle computer.

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