Electronic water pump device with installation and operation balance self-adaption function and control method of electronic water pump device

Abstract

The invention relates to an electronic water pump device with installation and operation balance self-adaption and a control method thereof, and the electronic water pump device comprises a pump head, a split embedded pump body, a rear cover, an I-shaped clamping ring, a salient point sealing ring, a stator, a rotor and a rotor eccentric balance self-adaption control system arranged in the split embedded pump body, the rotor eccentricity balance self-adaptive control system is composed of a pressure change sensor, a controller, a flow control device, a discharge control mechanism and the like, a complete closed-loop feedback is formed from rotor eccentricity detection, recognition, control, execution and final feedback, eccentricity correction can be completed no matter whether the rotor eccentricity faces any side, and the service life of the rotor is prolonged. The inner pump body is connected with the pump head in an embedded mode through an I-shaped clamping ring, and the bottom of the outer pump body is connected with the rear cover through a clamping column. The problems of poor operation stability, large noise, poor heat dissipation and insufficient reliability of the electronic water pump caused by rotor eccentricity are solved, and meanwhile the operation stability, the assembly reliability, the heat dissipation efficiency and the NVH comfort of the electronic water pump are improved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic water pumps, in particular to an electronic water pump device with installation and operation balance self-adaptation and a control method thereof. Background Art

[0002] Whether the electronic water pump is used as a key cooling device in the automotive thermal management system or as a core cooling device in the energy storage system, with the rapid iteration and update of the thermal management system and the energy storage system, the installation adaptability, heat dissipation, operation control stability, cooling performance and NVH performance of the electronic water pump are also facing increasingly severe challenges.

[0003] First, as the application environment of the cooling system becomes more and more complex and changeable, the performance and stability requirements of the electronic water pump are getting higher and higher. As the power, performance requirements and size of the traditional electronic water pump change, the heat dissipation, stability and NVH performance problems of the electronic water pump become more and more prominent. From the published patents CN220566300U, CN106151054A, CN114352534A and CN219220566U, although the direct connection of the impeller chamber, the motor chamber and the pump body chamber can achieve a certain heat dissipation purpose, this diversion method seriously reduces the performance and efficiency of the water pump, thereby affecting the cooling and heat dissipation of the entire cooling system, and from the perspective of fluid mechanics, this diversion method will also seriously cause shaft eccentricity, thereby affecting the operating stability of the entire electronic water pump.

[0004] Secondly, in the face of various thermal management systems and energy storage systems that are rapidly iterating and upgrading, the installation position, angle and environment of the electronic water pump are no longer single, but have become more complex and changeable. The existing electronic water pumps either use bolts to connect the pump head, pump body, end cover, back cover and other parts, such as the disclosed patents CN117231518A, CN116538100A and CN107514390B, which use bolts to connect the electronic water pump housing parts, or use laser or ultrasonic welding to connect the electronic water pump housing parts, such as the disclosed patents CN211116646U, CN114483598A, etc., which use welding to connect the electronic water pump housing parts. Connect the pump head and the pump body. Although bolt connection or welding can meet the connection and installation methods of a single cooling system, there is a risk of bolt falling off, thread slipping and failure after the electronic water pump has been running for a long time. On the other hand, the corresponding adapter screw hole must be designed for bolt installation. The overall size of the pump body structure will become larger, and the hole position after the design is finalized is difficult to adjust the installation angle of the pump head, and it cannot be installed to adapt to different cooling systems. The installation adaptability is extremely poor. When faced with complex and changeable thermal management and energy storage cooling systems, the installation position, installation angle and materials of the various components of the electronic water pump are different. At this time, the electronic water pump can no longer meet the requirements by bolt installation and welding.

[0005] Finally, on the one hand, the centroids of the components of the internal rotor of the electronic water pump are inconsistent, which will cause the rotor to run out of center after wear. On the other hand, due to the processing and manufacturing or assembly matching size chain, the bearing and the shaft match the inner cavity wall, and the roundness of the inner wall inevitably has certain design and manufacturing tolerances. After the water pump has been running for a period of time, wear will inevitably occur between the shaft and the bearing, which will lead to poor operating stability of the entire water pump, increased noise, and reduced NVH performance. From the perspective of existing technology, there is currently no solution to this problem. Therefore, it is urgent to design an innovative electronic water pump structure that can not only solve the problem of installation adaptability, but also solve the problem of self-heating and ensure that the system cooling is met, and can also solve the problem of electronic water pump operation stability and NVH performance. Summary of the invention

[0006] In view of the above problems, the present invention provides a solution to the problem of poor operating stability of an electronic water pump caused by rotor eccentricity, while reducing noise, improving NVH performance, and an electronic water pump device with easy assembly and adaptive installation and operation balance. A control method for correcting the eccentric position of the electronic water pump rotor is also proposed.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: an electronic water pump device with installation and operation balance self-adaptation, including a pump head, a split embedded pump body, a rear cover, a rotor eccentric balance self-adaptive control system arranged in the split embedded pump body, and a lower bearing and an upper bearing arranged in the center of the split embedded pump body. The split embedded pump body includes an inner pump body and an outer pump body nested from the inside to the outside, the bottom of the upper bearing and the top of the lower bearing are connected to each other and fixed by a rotor, the rotor is sleeved in the stator, and an impeller is interference-fitted above the rotor to realize the integration of the rotor and the impeller. At the same time, the impeller is interference-fitted with the upper bearing, and the inner pump body and the pump head are connected by a cross-section of The I-shaped clamping ring is embedded and connected, the bottom of the outer pump body is embedded and connected with the rear cover, the protruding positions at the upper and lower ends of the clamping ring are respectively inserted into the grooves of the pump head and the inner pump body, and the grooves on both sides of the clamping ring are respectively engaged with the protruding positions of the inner pump body and the pump head, and the two sides of the I-shaped clamping ring are symmetrical in shape, the end of the lower bearing away from the upper bearing is interference fit in the rotating shaft cavity inside the outer pump body, and the end of the upper bearing away from the lower bearing is interference fit in the inner pump body, and at the same time, the clamping ring is provided with an opening with an angle of 10° to 15°, and two assembly positioning grooves are provided at the matching position of the pump head and the clamping ring, and the rotor eccentric balance adaptive control system is used to control the eccentricity correction and operation of the electronic water pump rotor.

[0008] Preferably, the rotor eccentric balance adaptive control system includes a pressure sensor, a controller, a flow control device and an emission control mechanism. The pressure sensor is arranged on the inner wall of the rotating shaft cavity and is located on the side of the lower bearing. The flow control device is arranged in the lower gap of the stator and the flow control device includes an outer shell and a flow sensor and an actuator arranged in the outer shell. At the same time, the flow sensor is arranged above the actuator, and the controller is arranged at the bottom of the outer pump body.

[0009] Preferably, at least six flow control devices are provided and are evenly distributed along the circumference of the rotating shaft cavity inside the outer pump body. At the same time, the pressure change sensor and the emission control mechanism correspond to the number and position of the flow control devices.

[0010] Preferably, the flow control device includes an eccentric side flow control device, an opposite side flow control device and at least four other side flow control devices, and the pressure variable sensor includes an eccentric side pressure variable sensor, an opposite side pressure variable sensor and at least four other side pressure variable sensors.

[0011] Preferably, a plurality of guide columns are evenly distributed on the inner wall of the outer pump body along the circumference of the pump body, and a plurality of cylindrical convex rib heat dissipation columns are evenly distributed on the outer wall of the outer pump body along the circumference of the pump body. A plurality of clamping columns corresponding to the number of guide columns for connecting the pump body and the rear cover are evenly distributed on the mounting surfaces of the outer pump body end cover and the rear cover along the circumference of the pump body, and the inner pump body is provided with a plurality of assembly grooves matching the guide columns.

[0012] Preferably, the clamping column is mushroom-shaped and has a slit in the middle, and the size of the slit in the clamping portion is between one-fifth and one-quarter of the diameter of the matching hole on the split embedded pump body.

[0013] Preferably, the clamping ring is made of spring steel, and the outer diameter of the clamping ring is larger than the inner diameter of the pump head groove.

[0014] Preferably, the connection between the pump head and the inner pump body is sealed by a convex sealing ring (7), the material of the convex sealing ring is rubber, and the cross-sectional shape of the convex sealing ring is square, and convex points are respectively provided at the upper end and the center of the inner end face of the convex sealing ring, the inner convex point is engaged with the inner pump body, and the upper convex point is engaged with the pump head.

[0015] Preferably, a vibration-damping pad is provided between the upper bearing and the rotor, and a sealing groove is provided on the end face of the outer pump body, and the sealing groove fixes the inner pump body and the outer pump body by injecting glue.

[0016] A control method for an electronic water pump device with installation and operation balance self-adaptation, the specific steps are as follows:

[0017] S1, the pressure sensor detects whether the position of the electronic water pump rotor is eccentric. If the rotor is not eccentric, no adjustment is required. If the rotor is eccentric, proceed to step S2;

[0018] S2, the pressure sensor detects the eccentric position of the rotor and sends a signal to the controller;

[0019] S3, the controller sends a command to the flow control device to control, close the eccentric side flow sensor, fully open the opposite side flow sensor and adjust the other side flow sensors;

[0020] S4, the flow sensor device sends a signal and changes the opening of the discharge mechanism through the actuator;

[0021] S5. Repeat steps S1-S4 to realize closed-loop control and correct the eccentric position of the electronic water pump rotor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The rotor eccentricity balance adaptive control system of the present invention includes a pressure sensor, a controller, a flow control device and an emission control mechanism, which forms a complete closed-loop feedback from the detection, identification, control to execution and final feedback of the rotor eccentricity. Regardless of which side the rotor is eccentric, the eccentricity correction can be completed, which solves the problem of poor operating stability of the electronic water pump due to rotor eccentricity, as well as the problems of high noise and low NVH performance. At the same time, in order to reduce the operating stability problem of the electronic water pump, the inner pump body, waterproof chamber and bearing are designed as an integrated plastic-coated structure, which can avoid dimensional deviations caused by processing and assembly to the greatest extent, thereby improving the stability of the electronic water pump and improving the operating stability, NVH comfort and reliability of the entire water pump.

[0024] 2. The pump body of the present invention is an embedded split pump body structure, which is easy to assemble and has a compact structure, occupying a small space. At the same time, a large number of cylindrical convex rib heat dissipation columns are designed on the outer surface, which has small fluid resistance and better heat dissipation. At the same time, a pump body and rear cover clamping column structure without bolt connection is designed, which is convenient for assembly, uniform force, high structural strength and good stability, and solves the problems of poor structural adaptability, heat dissipation, stability and NVH performance of electronic water pumps caused by increasing power, performance and changing size.

[0025] 3. The electronic water pump of the present invention has a simple structure, convenient assembly, high reliability, and the two sides of the I-shaped clamp ring are designed to be symmetrical, so that the force is not eccentric, the bearing capacity is strong, the molding process is simple, the price is cheap, the cost is low, it is easy to assemble and disassemble for maintenance, and the adaptability is high. The pump head can be installed 360 degrees without dead angles, and can meet the requirements regardless of any complex and changeable installation environment and installation angle. Furthermore, a square-shaped convex sealing ring is designed to prevent the coolant in the pump head from flowing out from any angle and position, thereby ensuring the sealing reliability, operation stability and reliability of the water pump. The electronic water pump solves the problems of poor installation adaptability, rigid structural position variability, large installation space size, and poor installation angle adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 yes Figure 1 Sectional view along AA;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the split embedded pump body in the present invention;

[0029] Figure 4 yes Figure 3 A cross-section of China along the BB;

[0030] Figure 5 yes Figure 3 Cross-sectional view along CC;

[0031] Figure 6 It is a schematic diagram of the structure of the internal and external pump bodies of the present invention;

[0032] Figure 7 It is a schematic diagram of the inner pump body structure in the present invention;

[0033] Figure 8 It is a partial schematic diagram of the flow control device in the present invention;

[0034] Fig. 9 yes Figure 8 Sectional view along DD;

[0035] Fig.10 This is a schematic diagram of the installation of the clamp ring of the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the clamp ring in the present invention;

[0037] Fig.12 It is a schematic diagram of the flow of the rotor eccentric balance adaptive control system in the present invention. DETAILED DESCRIPTION

[0038] The following will be combined Figure 1-12 The present invention is described in detail. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0039] An electronic water pump device with installation and operation balance self-adaptation, comprising a pump head 6, a split embedded pump body, a rear cover 15, a rotor eccentric balance self-adaptive control system arranged in the split embedded pump body, and a lower bearing 1 and an upper bearing 4 arranged at the central position of the split embedded pump body. The split embedded pump body comprises an inner pump body 9 and an outer pump body 10 which are mutually nested from the inside to the outside. The bottom of the upper bearing and the top of the lower bearing are connected to each other and fixed by a rotor 2. The rotor is sleeved in a stator 31. A vibration damping pad 3 is provided between the upper bearing and the rotor. An impeller 5 is interference-fitted above the rotor 2 to realize the integration of the rotor and the impeller. At the same time, the impeller is interference-fitted with the upper bearing. The inner pump The pump body and the pump head are connected by an I-shaped clamping ring 8, the bottom of the outer pump body is connected by a rear cover, the protruding positions at the upper and lower ends of the clamping ring are respectively inserted into the grooves of the pump head and the inner pump body, and the grooves on both sides of the clamping ring are respectively engaged with the protruding positions of the inner pump body and the pump head, the end of the lower bearing away from the upper bearing is interference fit in the rotating shaft cavity inside the outer pump body, and the end of the upper bearing away from the lower bearing is interference fit in the inner pump body, and at the same time, an opening with an angle of 10° to 15° is opened on the clamping ring, and two assembly positioning grooves 16 are provided at the matching position of the pump head and the clamping ring, and the rotor eccentric balance adaptive control system is used to control the eccentricity correction and operation of the electronic water pump rotor.

[0040] The rotor eccentric balance adaptive control system includes a pressure sensor 11, a controller 14, a flow control device 13 and an emission control mechanism 17. The pressure sensor is arranged on the inner wall of the shaft cavity and is located on the side of the lower bearing. The flow control device is arranged in the gap at the lower part of the stator and the flow control device includes a shell 18 and a flow sensor 12 and an actuator 19 arranged in the shell. At the same time, the flow sensor is arranged above the actuator and the controller is arranged at the bottom of the outer pump body.

[0041] There are at least six flow control devices and they are evenly distributed along the circumference of the internal rotating shaft cavity of the outer pump body. At the same time, the pressure variable sensors and the emission control mechanisms correspond to the number and positions of the flow control devices. Specifically, the flow control device includes an eccentric side flow control device 23, an opposite side flow control device 24 and at least four other side flow control devices 26, and the pressure variable sensors include an eccentric side pressure variable sensor 27, an opposite side pressure variable sensor 28 and at least four other side pressure variable sensors 29.

[0042] Specifically, in order to reduce or eliminate the problems of rotor eccentricity caused by inconsistent structural center of mass of various components of the rotor, bearing wear and design assembly size tolerance, which leads to poor stability and NVH performance of the electronic water pump itself, the present invention designs a balanced adaptive electronic water pump control device and a closed-loop rotor eccentricity balance adaptive control system. The control logic diagram of the rotor eccentricity balance adaptive control system is as follows: Fig.12 As shown, when the pressure sensor detects that the rotor is not eccentric, no adjustment is required. When the pressure sensor detects the eccentric position of the rotor, the controller sends a command to the flow sensors on the corresponding sides of the eccentric side flow control device 23 and the opposite side flow control device 24. The flow sensor sends a signal and then changes the opening of the emission control mechanism through the actuator, thereby immediately closing the eccentric side flow sensor and fully opening the flow sensor on the opposite side at the same time, increasing the fluid pressure on the eccentric side and reducing the eccentric pressure on the opposite side. According to the Pascal principle in fluid mechanics, the eccentric part of the rotor will generate a reverse thrust due to the change in flow, and the eccentric position of the rotor has been preliminarily corrected. However, during the rotation process of the rotor, the eccentricity correction process will produce a certain error. The sub-eccentric balance adaptive control system is designed as a closed-loop rotor eccentric balance adaptive control system. Furthermore, during the preliminary correction process, the eccentricity errors at other positions are fed back to the pressure sensors on the other sides through the flow sensors on the other sides. At this time, these pressure sensors will also send signals to the controller. The controller sends corresponding instructions to adjust the flow size at the corresponding end of this position, and then corrects the corresponding flow size according to the instructions to achieve a balanced rotor state. In this way, the flow control device is evenly distributed circumferentially in the rotating shaft cavity inside the outer pump body, and a closed-loop feedback is formed through the adaptive rotor eccentric balance adaptive control system. Regardless of which side the rotor is eccentric, the eccentricity correction can be completed, thereby completely solving the problems of poor stability and NVH comfort of the electronic water pump.

[0043] Specifically, in order to solve the shortcomings of the electronic water pump such as poor structural adaptability, poor heat dissipation, stability and NVH performance caused by increasing power, performance and changing size, the present invention designs the pump body into an internally and externally embedded split structure, and a number of guide columns 20 are evenly distributed on the inner wall of the outer pump body along the circumference of the pump body. The number of guide columns in the present application is six, and the inner pump body is provided with a number of assembly grooves matching the guide columns, which is convenient to assemble and has a compact structure and occupies a small space. At the same time, a number of cylindrical convex rib heat dissipation columns 21 are evenly distributed on the outer wall of the outer pump body along the circumference of the pump body. Compared with the traditional strip convex rib structure that can only guide one-way wind, this structure has the advantage that no matter how much external heat dissipation wind blows from any direction around it, it can take away Heat, small fluid resistance, better heat dissipation; several clamping columns 22 connecting the pump body and the rear cover corresponding to the number of guide columns are evenly distributed on the mounting surfaces of the outer pump body end cover and the rear cover along the circumference of the pump body. The pump body and the rear cover can be connected without bolts through the clamping main structure. The clamping column is mushroom-shaped, with a smaller upper design to play a guiding role, and a larger lower side to play the role of being inserted into the matching hole of the pump body after assembly, and a gap is opened in the middle. The size of the gap is between one-fifth and one-quarter of the diameter of the matching hole on the split embedded pump body. In this way, on the basis of meeting the structural strength, it can be ensured that the two sides of the clamping column will shrink toward the middle during the assembly process, and the shrinkage gap is appropriate, which is convenient for assembly. After assembly, the clamping columns on both sides will pop open and be firmly installed in the matching holes of the pump body. The designed 6 clamping column structures are evenly distributed on the installation surfaces of the end cover and the rear cover along the circumference of the outer pump body, so that the water pump installation is evenly stressed and has good stability; finally, in order to reduce the problem of stability in the operation of the electronic water pump, a sealing groove 30 is provided on the end face of the outer pump body. The sealing groove realizes integrated plastic packaging of the inner pump body, waterproof chamber and bearing through glue injection, which can avoid dimensional deviations caused by processing and assembly to the greatest extent, thereby improving the stability of the electronic water pump.

[0044] Specific as Fig.10 , Fig.11As shown, first of all, the cross-sectional shape of the design is an I-shaped clamping ring structure, the protruding positions at the upper and lower ends of the structure are respectively inserted into the grooves of the pump head and the inner pump body, and the grooves on both sides in the middle also respectively engage with the protruding positions of the inner pump body and the pump head. The three-layer design structure has high strength and a stable connection and matching method. The clamping ring structure has a small opening, and the size design requirement of the small opening structure is between 10° and 15°. If the angle is too small, it will be inconvenient to assemble, and if the angle is too large, it will lead to small and uneven force, which will lead to unstable assembly and the risk of falling off and failure. The simulation analysis test verified that the force meets the uniform angle between 10° and 15°. The design is uniform and has high reliability. Furthermore, the two sides of the designed I-shaped clamping ring are symmetrical to ensure that the force is not eccentric, the load-bearing capacity is strong, the molding process is simple, the price is cheap, the cost is low, and the structure is compact. It can solve the problems of space occupation and rigidity in the design of the screw hole fixing position of the traditional electronic water pump. The material of the clamping ring structure is spring steel, such as 70, SUS301 and 65Mn, which can meet the requirements. At the same time, the outer diameter of the clamping ring structure is designed to be larger than the inner diameter of the pump head groove, so that the clamping ring structure can have a certain elastic force to clamp the pump head, so that the connection between the pump head and the pump body is reliable. Furthermore, to ensure assembly, two assembly positioning grooves are designed at the joints between the pump head and the clamp ring. During assembly, the clamp ring is pressed by a tool and the pump head is installed. After assembly, the tool is released and the clamp ring will pop open and get stuck between the pump head and the inner pump body due to its own elasticity. This design has a simple structure, is easy to assemble and disassemble for maintenance, has high adaptability, and the pump head can be installed 360 degrees without dead ends. No matter what complex and changeable installation environment and installation angle are faced, it can meet the requirements. On the other hand, to ensure the sealing performance of the water pump, a square convex sealing ring with a cross-section shape is designed. The square convex sealing ring 7 structure is designed, and two convex structures are designed on its upper end and inner side respectively. The inner convex point is used to connect to the pump body and engage with the inner pump body, and the upper end convex point is used to connect to the pump head and engage with the pump head. This design is not only convenient for positioning into the corresponding groove through the convex point during installation, and the assembly positioning is reliable, but also the upper end and inner convex point structure of the sealing ring can withstand radial and axial forces when the water pump is running, and can prevent the coolant in the pump head from flowing out from any angle and position, thereby ensuring the sealing reliability, operation stability and reliability of the water pump. The material of the convex point sealing ring is rubber, such as EPDM. At the same time, the convex point position design is required to be located in the middle position of the end face of the square convex point sealing ring, so that the convex point sealing ring can better bear the force.

[0045] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An electronic water pump device with installation and operation balance self-adaptation, characterized by: The invention comprises a pump head (6), a split embedded pump body, a rear cover (15), a rotor eccentric balance adaptive control system arranged in the split embedded pump body, and a lower bearing (1) and an upper bearing (4) arranged at the center of the split embedded pump body. The split embedded pump body comprises an inner pump body (9) and an outer pump body (10) which are mutually nested from the inside to the outside. The bottom of the upper bearing and the top of the lower bearing are connected to each other and fixed by a rotor (2). The rotor is sleeved in a stator (31). An impeller (5) is interference-fitted above the rotor (2) to realize the integration of the rotor and the impeller. At the same time, the impeller is interference-fitted with the upper bearing. The inner pump body and the pump head are connected by a cross section of the working The outer pump body is provided with a rear cover and a clamping ring (8) in the shape of a letter "U". The bottom of the outer pump body is connected with the rear cover in the shape of a letter "U". The protruding positions at the upper and lower ends of the clamping ring are respectively inserted into the grooves of the pump head and the inner pump body, and the grooves on both sides of the clamping ring are respectively inserted into the protruding positions of the inner pump body and the pump head. The end of the lower bearing away from the upper bearing is interference fit in the shaft cavity inside the outer pump body, and the end of the upper bearing away from the lower bearing is interference fit in the inner pump body. At the same time, an opening with an angle of 10° to 15° is provided on the clamping ring. Two assembly positioning grooves (16) are provided at the matching position of the pump head and the clamping ring. The rotor eccentric balance adaptive control system is used to control the eccentricity correction of the electronic water pump rotor.

2. The electronic water pump device with installation and operation balance self-adaptation according to claim 1, characterized in that: The rotor eccentric balance adaptive control system comprises a pressure sensor (11), a controller (14), a flow control device (13) and an emission control mechanism (17), wherein the pressure sensor is arranged on the inner wall of the rotating shaft cavity and is located on the side of the lower bearing, the flow control device is arranged in the gap at the bottom of the stator and comprises a housing (18) and a flow sensor (12) and an actuator (19) arranged in the housing, and the flow sensor is arranged above the actuator, and the controller is arranged at the bottom end of the outer pump body.

3. The electronic water pump device with installation and operation balance self-adaptation according to claim 2, characterized in that: There are at least six flow control devices and they are evenly distributed along the circumference of the rotating shaft cavity inside the outer pump body. At the same time, the pressure change sensor and the emission control mechanism correspond to the number and position of the flow control devices.

4. The electronic water pump device with installation and operation balance self-adaptation according to claim 3, characterized in that: The flow control device comprises an eccentric side flow control device (23), an opposite side flow control device (24) and at least four other side flow control devices (26); the pressure variable sensor comprises an eccentric side pressure variable sensor (27), an opposite side pressure variable sensor (28) and at least four other side pressure variable sensors (29).

5. The electronic water pump device with installation and operation balance self-adaptation according to claim 1, characterized in that: A plurality of guide columns (20) are evenly distributed on the inner wall of the outer pump body along the circumference of the pump body, and a plurality of cylindrical convex rib heat dissipation columns (21) are evenly distributed on the outer wall of the outer pump body along the circumference of the pump body. A plurality of clamping columns (22) for connecting the pump body and the rear cover corresponding to the number of the guide columns are evenly distributed on the mounting surface of the outer pump body end cover and the rear cover along the circumference of the pump body, and the inner pump body is provided with a plurality of assembly grooves (31) matching the guide columns.

6. The electronic water pump device with installation and operation balance self-adaptation according to claim 5, characterized in that: The clamping column is mushroom-shaped and has a slit in the middle. The size of the slit in the clamping portion is between one fifth and one quarter of the diameter of the matching hole on the split embedded pump body.

7. The electronic water pump device with installation and operation balance self-adaptation according to claim 1, characterized in that: The clamping ring is made of spring steel, and the outer diameter of the clamping ring is larger than the inner diameter of the pump head groove.

8. The electronic water pump device with installation and operation balance self-adaptation according to claim 1, characterized in that: The connection between the pump head and the inner pump body is sealed by a convex sealing ring (7), the material of the convex sealing ring is rubber, and the cross-section of the convex sealing ring is square. The upper end and the center of the inner end surface of the convex sealing ring are respectively provided with convex points, the inner convex point is engaged with the inner pump body, and the upper convex point is engaged with the pump head.

9. The electronic water pump device with installation and operation balance self-adaptation according to claim 1, characterized in that: A vibration damping pad (3) is provided between the upper bearing and the rotor, and a sealing groove (30) is provided on the end surface of the outer pump body. The sealing groove is used to fix the inner pump body and the outer pump body by injecting glue.

10. The control method of the electronic water pump device with installation and operation balance self-adaptation according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, the pressure sensor detects whether the rotor position of the electronic water pump is eccentric. If the rotor is not eccentric, no adjustment is required. If the rotor is eccentric, proceed to step S2; S2, the pressure sensor detects the eccentric position of the rotor and sends a signal to the controller; S3, the controller sends a command to the flow control device to control, close the eccentric side flow sensor, fully open the opposite side flow sensor and adjust the other side flow sensors; S4, the flow sensor device sends a signal and changes the opening of the discharge mechanism through the actuator; S5. Repeat steps S1-S4 continuously to implement closed-loop control to correct the eccentric position of the electronic water pump rotor.

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