A driving motor for a water pump

Abstract

The present invention discloses a driving motor for a water pump, which relates to the technical field of motors, and comprises a base and a shell connected to the base, wherein a stator and a rotor are arranged in the shell, a cooling chamber is arranged inside the base, and a rotating shaft is rotatably arranged in the cooling chamber, the rotor is connected to the rotating shaft, a partition is arranged inside the cooling chamber, and a flow conversion mechanism for converting the cooling liquid in a static state inside the cooling chamber into a flowing state is arranged on the partition. The driving motor for a water pump provided by the present invention can turn on the flow conversion mechanism while using the motor, and the cooling liquid in a static state inside the cooling chamber can be converted into a flowing state through the flow conversion mechanism, so that the cooling liquid inside and the cooling liquid outside circulate, so as to improve the cooling effect, thereby improving the service life of the rotating shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a driving motor for a water pump. Background Art

[0002] A well-known submersible pump is a pump used to pump liquid from a low position to a high position. It is usually installed in a liquid, such as a well, river, lake or pond. Its working principle is to drive the impeller in the pump body to rotate through an electric motor, thereby generating suction and pressure to pump the liquid out. A submersible pump usually consists of a motor, a pump body, an impeller, a sealing device and a cable. The motor is connected to an external power source through a cable to drive the impeller in the pump body to rotate. When the impeller rotates, the liquid is sucked into the pump body and pumped to a high position by the centrifugal force of the impeller.

[0003] For example, the patent document with the authorization announcement number CN214577768U, the authorization date 2021-11-02, and the name "An axial bearing device for the pump shaft of an internally cooled down-suction submersible pump" includes a base connected to the pump body, a cooling cavity for the pump shaft to pass through is provided on the base, a water injection hole and a drainage hole are provided on the cooling cavity, and sealing bolts are provided on the water injection hole and the drainage hole, an oil seal is provided on the outer side of the cooling cavity and the matching position with the pump shaft, a sand throwing ring is provided on the oil seal cover and is sleeved on the pump shaft, and in the cooling cavity A bearing sleeve is provided at the side that cooperates with the pump shaft, a bearing supporting the pump shaft is provided in the bearing sleeve, a thrust plate fixed to the end of the pump shaft is provided in the cooling chamber, a bearing seat capable of moving axially along the pump shaft is provided in the cooling chamber, a thrust bearing is provided between the bearing seat and the thrust plate, an adjusting bolt capable of adjusting the bearing seat to move axially along the pump shaft is provided on the cooling chamber, a pressure regulating film covering the adjusting bolt and a protective cover covering the pressure regulating film are provided outside the cooling chamber; this structure can better support the axial direction of the pump shaft and improve the working stability of the water pump.

[0004] The disadvantage of the prior art is that when the motor inside the water pump is in operation for a long time, the coolant inside the cooling chamber is almost static, so the cooling effect is relatively poor, so that the heat of the shaft cannot be fully dissipated, thereby reducing the service life of the shaft. Summary of the invention

[0005] The object of the present invention is to provide a driving motor for a water pump to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A driving motor for a water pump comprises a base and a shell connected to the base, wherein a stator and a rotor are arranged in the shell, a cooling chamber is arranged inside the base, a rotating shaft is rotatably arranged in the cooling chamber, the rotor is connected to the rotating shaft, a partition is arranged inside the cooling chamber, and a commutation mechanism for converting a coolant in a static state in the cooling chamber into a flowing state is arranged on the partition.

[0008] The above-mentioned water pump driving motor, the commutation mechanism includes a first transmission wheel and a second transmission wheel that transmit to each other, the first transmission wheel is sleeved on the rotating shaft, the second transmission wheel is rotatably set on the partition, a through hole is opened inside the second transmission wheel, an impeller is fixedly connected to the side wall of the through hole, and a drainage hole is opened on the partition, and the drainage hole is arranged corresponding to the through hole.

[0009] The water pump driving motor mentioned above has a reflux hole formed on the partition plate.

[0010] The above-mentioned water pump driving motor has a buffer plate disposed in the cooling chamber.

[0011] The above-mentioned water pump driving motor is also provided with a pressure regulating mechanism on the base for maintaining a constant pressure inside the cooling chamber.

[0012] The above-mentioned driving motor for the water pump, the pressure regulating mechanism includes a pressure regulating plate, a pressure regulating cylinder is fixedly connected to the base, a pressure regulating hole is opened at the bottom end of the base, the pressure regulating cylinder is connected with the cooling chamber through the pressure regulating hole, the pressure regulating plate is slidably arranged on the inner wall of the pressure regulating cylinder, and a first spring is arranged between the pressure regulating plate and the inner wall of the pressure regulating cylinder.

[0013] In the above-mentioned driving motor for the water pump, the pressure regulating plate is made of elastic material.

[0014] The above-mentioned driving motor for the water pump is provided with a circular hole on the pressure regulating plate, an I-shaped piece is slidably arranged on the pressure regulating plate, a second spring is arranged between the I-shaped piece and the pressure regulating plate, the radial dimension of the vertical section of the I-shaped piece is smaller than the radial dimension of the circular hole, and an abutment block is fixedly connected to the pressure regulating cylinder, and the abutment block is located on the movement stroke of the I-shaped piece.

[0015] In the above-mentioned water pump driving motor, the first transmission wheel and the second transmission wheel are both friction wheels, the first transmission wheel is truncated cone-shaped, the second transmission wheel is inverted truncated cone-shaped, and an adjustment wheel is slidably arranged on the partition, and the adjustment wheel is located between the first transmission wheel and the second transmission wheel.

[0016] In the above-mentioned water pump driving motor, a transmission member for adjusting the position of the adjusting wheel is arranged between the adjusting wheel and the pressure regulating plate.

[0017] In the above technical scheme, the present invention provides a driving motor for a water pump. When the motor is used, the commutation mechanism is turned on. The coolant in a static state inside the cooling chamber can be converted into a flowing state through the commutation mechanism, so that the coolant inside and the coolant outside circulate to improve the cooling effect, thereby increasing the service life of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A partial cross-sectional structural schematic diagram provided for yet another embodiment of the present invention;

[0020] Figure 2 for Figure 1 A is an enlarged schematic diagram of the local structure at center A;

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point B in the middle.

[0022] Description of reference numerals:

[0023] 1. Base; 2. Cooling chamber; 3. Rotating shaft; 4. Partition; 5. First transmission wheel; 6. Second transmission wheel; 7. Through hole; 8. Impeller; 9. Drainage hole; 10. Reflux hole; 11. Pressure regulating plate; 12. Pressure regulating cylinder; 13. Pressure regulating hole; 14. First spring; 15. Sliding part; 16. Slide groove; 17. Buffer plate; 18. Round hole; 19. I-shaped part; 20. Second spring; 21. Abutment block; 22. Adjusting wheel; 2201. Connecting shaft; 2202. Friction disk; 23. Inclined groove; 24. Connecting rod; 25. First rotating seat; 26. Vertical rod; 27. Second rotating seat. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, it is to be understood that Figure 2The position of the middle drainage hole 9 relative to the impeller 8 is above, and vice versa. The terms "center", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] Reference Figure 1-3 A driving motor for a water pump provided by an embodiment of the present invention comprises a base 1 and a shell connected to the base 1, wherein a stator and a rotor (not shown in the figure) are arranged in the shell, a cooling chamber 2 is arranged inside the base 1, and a rotating shaft 3 is rotatably arranged in the cooling chamber 2, the rotor is connected to the rotating shaft 3, a partition 4 is arranged inside the cooling chamber 2, and a flow conversion mechanism for converting the coolant in a static state in the cooling chamber 2 into a flowing state is arranged on the partition 4.

[0027] Specifically, the base 1 is in a cylindrical shape, and the hollow area inside the base 1 is a cooling chamber 2, which is filled with a coolant. The partition 4 is coaxially arranged with the cooling chamber 2 inside the base 1, and the cooling chamber 2 is divided into an upper chamber and a lower chamber under the action of the partition 4, which is used to install a thrust bearing, and the thrust bearing is sleeved on the rotating shaft 3 to achieve thrust on the rotating shaft 3, providing the power required for the operation of the motor, so that under the action of the stator, the rotor and the rotating shaft 3 are driven to rotate. Heat is generated in the process of rotation and thrust of the rotating shaft 3, and the generated heat will be absorbed by the coolant in the cooling chamber 2, so that it can be achieved The cooling effect is a prior art and will not be elaborated. One of the core innovations of the present invention is that a flow conversion mechanism is arranged inside the cooling chamber 2 through the partition 4. The flow conversion mechanism can be a structure such as a stirring rod. By controlling the rotation of the stirring rod, the flow conversion of the coolant can be achieved. The purpose of such a setting is to turn on the flow conversion mechanism while using the motor. The coolant in the static state inside the cooling chamber 2 can be converted into a flowing state through the flow conversion mechanism, so that the coolant on the inside and the coolant on the outside circulate to improve the cooling effect, thereby increasing the service life of the rotating shaft 3 and the thrust bearing.

[0028] As another embodiment of the present invention, the commutation mechanism includes a first transmission wheel 5 and a second transmission wheel 6 that transmit to each other, the first transmission wheel 5 is sleeved on the rotating shaft 3, the second transmission wheel 6 is rotatably arranged on the partition 4, a through hole 7 is opened inside the second transmission wheel 6, an impeller 8 is fixedly connected in the through hole 7 (such as the impeller 8 is connected to the side wall of the through hole 7 through a bracket), a drainage hole 9 is opened on the partition 4, and the drainage hole 9 is arranged corresponding to the through hole 7. Specifically, the first transmission wheel 5 and the second transmission wheel 6 can be transmission structures such as gears or pulleys, there is one first transmission wheel 5, there are multiple second transmission wheels 6, and preferably three, and similarly, there are preferably three impellers 8, two of which have an upward force, and one impeller 8 has a downward force, and the upward impeller 8 is one more than the downward impeller 8, which can be used to balance the downward flow caused by the coolant's own gravity to be greater than the upward flow. In the present invention, the first transmission wheel 5 is fixedly connected to the outer circumference of the rotating shaft 3, an annular groove is provided on the lower surface of the partition 4, and an extension portion such as an annular connecting structure adapted to the annular groove is provided on the top of the second transmission wheel 6, and the extension portion is rotatably connected to the annular groove. The impeller 8 is fixedly connected to the inner wall of the through hole 7 through a structure such as a bracket or a connecting rod. The effect of such a setting is that when the motor is working, the rotating shaft 3 will be driven to rotate by electricity. During the rotation of the rotating shaft 3, the first transmission wheel 5 on its outer circumference will be driven to rotate synchronously. Under the transmission action of the first transmission wheel 5 and the second transmission wheel 6, the second transmission wheel 6 will be driven to rotate. Since the impeller 8 is fixedly connected to the inside of the through hole 7, the rotation of the second transmission wheel 6 will drive the through hole 7 and the impeller 8 inside it to rotate synchronously. The rotation of the impeller 8 will cause convection of the coolant inside the upper cavity and the lower cavity. During the convection process, the coolant inside the cooling cavity 2 circulates, thereby improving the cooling effect of the coolant.

[0029] Furthermore, the base 1 is made of heat-conducting material. During the circulation of the coolant, the heat will be transferred to the outside of the motor through the side wall of the base 1 to achieve the effect of circulating heat dissipation.

[0030] When the existing impeller 8 is in use, its mounting seat is fixed. When the position of the impeller 8 needs to be adjusted, an additional driving member is required to achieve it. Preferably, the through hole 7 is eccentrically arranged, and the eccentric arrangement means that the central axis of the through hole 7 is parallel to the central axis of the second transmission wheel 6, but not on the same straight line. During the rotation of the second transmission wheel 6, the through hole 7 will be driven to rotate around the central axis of the second transmission wheel 6. Due to the eccentric arrangement of the through hole 7, the position of the impeller 8 can be passively adjusted while the second transmission wheel 6 rotates, the convection area of ​​the upper cavity and the lower cavity can be increased, thereby further improving the cooling effect.

[0031] Preferably, the radial dimension of the first transmission wheel 5 is smaller than the radial dimension of the second transmission wheel 6 to achieve a deceleration effect and avoid damage to the impeller 8 caused by an overly fast rotation speed of the second transmission wheel 6 .

[0032] Furthermore, the partition 4 is also provided with a reflux hole 10, and there are multiple reflux holes 10. The reflux holes 10 can be used for the coolant to pass through. When the convection volume inside the upper cavity and the lower cavity is abnormal, the abnormal convection volume can be balanced through the reflux holes 10. That is, when the convection causes more coolant inside the upper cavity, the coolant inside the upper cavity will flow into the lower cavity through the reflux holes 10, and vice versa.

[0033] It should be noted that the coolant will absorb heat and expand when cooled. In severe cases, the pressure generated by the expanded coolant may cause damage to the motor. For this reason, the base 1 is further provided with a pressure regulating mechanism for maintaining a constant pressure inside the cooling chamber 2. Specifically, the pressure regulating mechanism may be a retractable structure such as an elastic membrane. The purpose of such a setting is that when the pressure inside the cooling chamber 2 is too high, the pressure regulating mechanism will expand to relieve the high pressure inside the cooling chamber 2.

[0034] Preferably, the pressure regulating mechanism includes a pressure regulating plate 11, a pressure regulating cylinder 12 is fixedly connected to the base 1, a pressure regulating hole 13 is provided at the bottom end of the base 1, the pressure regulating cylinder 12 is connected to the cooling chamber 2 through the pressure regulating hole 13, the pressure regulating plate 11 is slidably arranged on the inner wall of the pressure regulating cylinder 12, and a first spring 14 is arranged between the pressure regulating plate 11 and the inner wall of the pressure regulating cylinder 12. Specifically, the pressure regulating cylinder 12 is cylindrical and is fixedly connected to the outer bottom wall of the base 1, the pressure regulating plate 11 is circular plate-shaped, and the sliding arrangement, that is, a slide groove 16 is provided on the inner wall of the pressure regulating cylinder 12, a sliding connection portion 15 adapted to the slide groove 16 is provided on the circumferential surface of the pressure regulating plate 11, the sliding connection portion 15 is slidably connected to the slide groove 16, and the first spring 14 is arranged The purpose of such a setting between the inner bottom wall of the slide groove 16 and the lower surface of the sliding part 15 is that when the interior of the cooling chamber 2 is at normal pressure, the first spring 14 is in a compressed state. Under the action of the first spring 14, the sliding part 15 fits against the inner wall of the slide groove 16. When the pressure inside the cooling chamber 2 is relatively high (that is, the temperature of the coolant is relatively high at this time), the sliding part 15 will slide downward along the slide groove 16, thereby driving the pressure regulating plate 11 to move downward and further compressing the first spring 14, so as to increase the space inside the cooling chamber 2 to achieve the purpose of reducing the internal pressure of the cooling chamber 2. When the pressure inside the cooling chamber 2 returns to normal, the pressure regulating plate 11 and the sliding part 15 will automatically reset under the action of the first spring 14.

[0035] Furthermore, a buffer plate 17 is provided in the cooling chamber 2. The buffer plate 17 is made of elastic material. The elastic material may be existing plastic or rubber or other materials. The buffer plate 17 is located below the through hole 7. When the coolant inside the upper cavity flows to the lower cavity through the acceleration action of the impeller 8, it will preferentially contact the buffer plate 17. Since the buffer plate 17 is made of elastic material, it can buffer the impact force of the coolant and prevent the coolant from directly impacting the pressure regulating plate 11.

[0036] Preferably, the pressure regulating plate 11 is made of elastic material. Specifically, the elastic material can be an existing structure such as an elastic steel plate or plastic. The cross-section of the pressure regulating plate 11 is arc-shaped, and the arc surface of the arc protrudes upward, and the force that causes the pressure regulating plate 11 to deform is greater than the elastic force of the first spring 14. The effect of such a setting is that when the sliding portion 15 slides to the bottom end of the slide groove 16, the pressure inside the cooling chamber 2 is still at a large value, the pressure inside the cooling chamber 2 will cause the pressure regulating plate 11 to deform, that is, the pressure regulating plate 11 will sink downward, which can increase the space inside the cooling chamber 2 to balance the pressure inside the cooling chamber 2, thereby achieving a secondary pressure reduction effect to avoid damage to the motor.

[0037] Furthermore, a circular hole 18 is provided on the pressure regulating plate 11, and a profiled piece 19 (referring to a profiled cross section) is slidably provided on the pressure regulating plate 11, and a second spring 20 is provided between the profiled piece 19 and the pressure regulating plate 11, and a horizontal section at the upper end of the profiled piece 19 is sealedly connected to the circular hole 18, but a radial dimension of a vertical section of the profiled piece 19 is smaller than a radial dimension of the circular hole 18, and an abutment block 21 is fixedly connected to the pressure regulating cylinder 12, and the abutment block 21 is located at the profiled piece 19. In terms of the movement stroke of the molded part 19, specifically, the radial dimension of the horizontal section at the top of the molded part 19 is greater than the radial dimension of the circular hole 18, and a slideway is provided on the inner wall of the circular hole 18, along which the vertical section of the molded part 19 can slide vertically, and the second spring 20 is arranged between the horizontal section at the bottom end of the molded part 19 and the lower surface of the pressure regulating plate 11. The effect of such arrangement is that when the sliding of the sliding part 15 and the slide groove 16 and the deformation amount generated by the pressure regulating plate 11 still cannot balance the pressure inside the cooling chamber 2, the pressure regulating plate 11 is in the production When the pressure regulating plate 11 is deformed, it will sink downward to a greater extent. During the process of the pressure regulating plate 11 sinking downward, the bottom end of the I-shaped piece 19 will abut against the abutment block 21, so that the I-shaped piece 19 cannot move further downward, but the pressure regulating plate 11 will continue to sink downward and compress the second spring 20. Therefore, the sealing effect of the horizontal section at the top of the I-shaped piece 19 on the circular hole 18 is released. At this time, the circular hole 18 is opened, and because the radial dimension of the vertical section of the I-shaped piece 19 is smaller than the radial dimension of the circular hole 18, the coolant will flow out from the I-shaped piece 19. The coolant in the cooling chamber 2 is under a high pressure and the coolant in the cooling chamber 2 is under a high pressure. ...

[0038] Furthermore, since the coolant is automatically discharged under high pressure, when it is necessary to add coolant to the cooling chamber 2, the horizontal section at the bottom of the I-shaped part 19 is pressed by hand to open the circular hole 18, and the coolant can be added to the cooling chamber 2 through the gap between the circular hole 18 and the vertical section of the I-shaped part 19.

[0039] As another embodiment of the present invention, the first transmission wheel 5 and the second transmission wheel 6 are both friction wheels, the first transmission wheel 5 is truncated cone-shaped (the truncated cone-shaped means that the radial size of the first transmission wheel 5 decreases step by step along the vertical upward direction), and the second transmission wheel 6 is inverted truncated cone-shaped (the truncated cone-shaped means that the radial size of the second transmission wheel 6 increases step by step along the vertical upward direction), and an adjusting wheel 22 is slidably provided on the partition 4, and the adjusting wheel 22 is located between the first transmission wheel 5 and the second transmission wheel 6. Specifically, an inclined groove 23 is provided on the partition 4, and the adjusting wheel 22 includes a connecting shaft 2201 and a friction disk 2202 rotatably connected to the connecting shaft 2201, and the connecting shaft 2201 and the friction disk 2202 are provided with an existing limiting structure for preventing the two from axial movement, and the end of the connecting shaft 2201 is slidably connected to the inclined groove 23, and the friction disk 2202 The circumferential surface is frictionally transmitted with the first transmission wheel 5 and the second transmission wheel 6 at the same time. The purpose of such a setting is that the connecting shaft 2201 slides inside the inclined groove 23, so that the friction plate 2202 can be driven to slide synchronously under the action of the limiting structure, so that the position of the friction plate 2202 can be adjusted. When the connecting shaft 2201 slides obliquely upward along the inclined groove 23, the friction plate 2202 will slide obliquely upward synchronously. Since the first transmission wheel 5 is a truncated cone and the second transmission wheel 6 is an inverted truncated cone, when the friction plate 2202 moves obliquely upward, the transmission ratio between the first transmission wheel 5 and the second transmission wheel 6 increases, achieving the purpose of deceleration, thereby reducing the rotation speed of the impeller 8. Conversely, when the friction plate 2202 moves obliquely downward, the transmission ratio between the first transmission wheel 5 and the second transmission wheel 6 decreases, achieving the purpose of acceleration. In this way, the rotation speed of the impeller 8 can be adjusted by adjusting the position of the adjusting wheel 22.

[0040] Preferably, a transmission member for adjusting the position of the adjusting wheel 22 is provided between the adjusting wheel 22 and the pressure regulating plate 11. Specifically, the transmission member may be a reciprocating transmission component such as a cylinder, which adjusts the position of the adjusting wheel 22 by extending and shortening the output end of the cylinder, so as to actively adjust the rotational speed of the second transmission wheel 6 and the impeller 8.

[0041] As another preferred embodiment of the present invention, the transmission member includes a connecting rod 24, a first rotating seat 25 is provided on the adjusting wheel 22, a vertical rod 26 is fixedly connected to the pressure regulating plate 11, and a second rotating seat 27 is fixedly connected to the vertical rod 26. One end of the connecting rod 24 is rotatably connected to the first rotating seat 25, and the other end of the connecting rod 24 is rotatably connected to the second rotating seat 27. Specifically, the vertical rod 26 is fixedly connected to the upper surface of the sliding portion 15, and passes through the side wall and the base of the pressure regulating cylinder 12. The bottom wall of the cooling chamber 2 extends into the cooling chamber 2. The first rotating seat 25 is fixed to the connecting shaft 2201. The second rotating seat 27 is fixed to the top of the vertical rod 26. Both ends of the connecting rod 24 are spherical. The first rotating seat 25 and the second rotating seat 27 are each provided with a spherical groove adapted to the end of the connecting rod 24. The effect of such a setting is that when the sliding portion 15 slides downward along the sliding groove 16 (that is, the temperature of the coolant in the cooling chamber 2 is too high at this time), since the vertical rod 26 is fixed to the sliding portion 15, the sliding portion 15 is not moved. During the downward movement of the connecting portion 15, the vertical rod 26 and the second rotating seat 27 will be driven to move downward synchronously, and the first spring 14 will be further compressed. Under the action of the connecting rod 24, the second rotating seat 27 and the connecting shaft 2201 can be driven to slide obliquely downward, thereby driving the friction plate 2202 to move obliquely downward between the first transmission wheel 5 and the second transmission wheel 6 to increase the rotation speed of the second transmission wheel 6 and the impeller 8, thereby improving the cooling effect. On the contrary, when the temperature inside the cooling chamber 2 is reduced, the sliding connection 15 and the vertical rod 26 move upward under the elastic force of the first spring 14, thereby driving the friction plate 2202 to move obliquely upward to achieve a deceleration effect. In summary, when the coolant inside the cooling chamber 2 is too high, the rotation speed of the impeller 8 can be passively increased through the transmission member to improve the cooling effect. When the coolant inside the cooling chamber 2 returns to normal temperature, the rotation speed of the impeller 8 can be passively reduced through the transmission member to avoid damage to the impeller 8, thereby realizing passive regulation of the rotation speed of the impeller 8.

[0042] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A driving motor for a water pump, comprising a base and a shell connected to the base, wherein a stator and a rotor are arranged in the shell, a cooling chamber is arranged inside the base, and a rotating shaft is rotatably arranged in the cooling chamber, and the rotor is connected to the rotating shaft, characterized in that: A partition is provided inside the cooling chamber, and a flow conversion mechanism is provided on the partition for converting the coolant in a static state inside the cooling chamber into a flowing state; The commutation mechanism comprises a first transmission wheel and a second transmission wheel which transmit to each other, the first transmission wheel is sleeved on the rotating shaft, the second transmission wheel is rotatably arranged on the partition plate, a through hole is provided inside the second transmission wheel, an impeller is fixedly connected to the side wall of the through hole, a drainage hole is provided on the partition plate, and the drainage hole is arranged corresponding to the through hole; The base is also provided with a pressure regulating mechanism for maintaining a constant pressure inside the cooling chamber; The pressure regulating mechanism comprises a pressure regulating plate, a pressure regulating cylinder is fixedly connected to the base, a pressure regulating hole is opened at the bottom end of the base, the pressure regulating cylinder is connected with the cooling chamber through the pressure regulating hole, the pressure regulating plate is slidably arranged on the inner wall of the pressure regulating cylinder, and a first spring is arranged between the pressure regulating plate and the inner wall of the pressure regulating cylinder; A circular hole is provided on the pressure regulating plate, an I-shaped piece is slidably provided on the pressure regulating plate, a second spring is provided between the I-shaped piece and the pressure regulating plate, the radial dimension of the vertical section of the I-shaped piece is smaller than the radial dimension of the circular hole, an abutment block is fixedly connected to the pressure regulating cylinder, and the abutment block is located on the movement stroke of the I-shaped piece.

2. A water pump drive motor according to claim 1, characterized in that: The partition plate is also provided with a reflux hole.

3. A water pump drive motor according to claim 1, characterized in that: A buffer plate is arranged in the cooling cavity.

4. A water pump drive motor according to claim 1, characterized in that: The pressure regulating plate is made of elastic material.

5. A water pump driving motor according to claim 1, characterized in that: The first transmission wheel and the second transmission wheel are both friction wheels, the first transmission wheel is in the shape of a truncated cone, the second transmission wheel is in the shape of an inverted truncated cone, an adjusting wheel is slidably arranged on the partition, and the adjusting wheel is located between the first transmission wheel and the second transmission wheel.

6. A water pump driving motor according to claim 5, characterized in that: A transmission member for adjusting the position of the adjusting wheel is arranged between the adjusting wheel and the pressure regulating plate.

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