A dual-stator axial flux electronic water pump

Abstract

This invention discloses a dual-stator axial flux electronic water pump, belonging to the field of electronic water pump technology. It includes a housing with a streamlined structure and a rotating shaft rotatably mounted inside. A rotor is fixedly connected to the surface of the rotating shaft, and a protective plate is provided on the outer surface of the rotor. During operation, when pumping fluids at normal temperatures, the impeller rotation draws water from the housing inlet. The fluid circulates between the front and rear water jackets and the rotor, carrying away heat from the front and rear stator assemblies and the rotor, achieving efficient heat dissipation. When pumping fluids at higher temperatures, the shape memory metal components expand, opening the heat dissipation holes. Simultaneously, the material bladder is intermittently compressed, and the coolant circulates within the housing and material bladder, automatically enhancing heat exchange, delaying temperature rise, and eliminating localized overheating, achieving highly reliable passive intelligent temperature control.

Description

Technical Field

[0001] This invention relates to the field of electronic water pump technology, specifically to a dual-stator axial flux electronic water pump. Background Technology

[0002] Electronic water pumps are core components for thermal management in fields such as new energy vehicles, energy storage power stations, and data centers. Leveraging their variable frequency speed control and precise temperature control capabilities, they ensure the efficient operation of the three-electric system in new energy vehicles, prevent battery thermal runaway in energy storage power stations, and support high-density server deployment cooling in data centers. They are crucial equipment for ensuring the safe, stable, and efficient operation of various systems. However, with the continuous development of new energy vehicles, energy storage power stations, data centers, and industrial equipment, the requirements for thermal management and electromagnetic compatibility in these fields are constantly increasing. If the cooling effect of electronic water pumps is insufficient, it can lead to temperature control failure, causing equipment overheating derating, shortened lifespan, or the risk of thermal runaway. To solve this problem, existing technology 1 (Chinese utility model patent application number 202221251755.5, application date 2022-05-19) addresses this issue. (Application) A heat dissipation structure for the rear cover of an electronic water pump, wherein the other side of the rear cover has several protruding heat dissipation pillars, each protrusion being able to face at least one of the heat dissipation pillars along the axial direction of the rear cover. At the same time, its heat dissipation structure for the rear cover can better dissipate the heat of the chip and save material costs. There is also prior art 2 (Chinese utility model patent application with application number 202023141174.X, application date 2020-12-23) a heat dissipation device for an electronic water pump. Since the pressure at the outlet is greater than that at the inlet, part of the liquid flowing to the outlet will enter the input pipe and be sent to the heat sink to remove heat. Then, it will be sent out to the inlet through the output pipe to complete the active water cooling external circulation. In this way, the heat sink can use the liquid drawn by the electronic water pump to dissipate heat to the controller, thereby producing a better cooling effect than general natural convection.

[0003] During use, the frequent changes in battery charge and discharge rates, fluctuations in ambient temperature, and dynamic adjustments in server computing load cause real-time fluctuations in system heat generation, which in turn changes the cooling requirements. If the cooling effect of the electronic water pump is singular, the coolant flow rate and velocity will not be able to adaptively adjust to the actual heat load, resulting in the continuous accumulation of local hot spots and severely uneven temperature distribution within the system, which in turn affects the use of the water pump. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-stator axial flux electronic water pump to solve the problem mentioned in the background art that the heat dissipation effect of electronic water pumps is singular, which leads to the inability of the coolant flow rate and velocity to adaptively adjust with the actual heat load, resulting in the continuous accumulation of local hot spots and severely uneven temperature distribution within the pump, thus affecting the use of the water pump.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-stator axial flux electronic water pump, comprising a housing, the housing having a streamlined structure, and a rotating shaft rotatably disposed inside the housing, with an impeller fixedly connected to the end of the rotating shaft, and a front water-separating sleeve and a rear water-separating sleeve disposed on the inner wall of the housing; a rotor is fixedly connected to the surface of the rotating shaft, and a protective plate is disposed on the outer surface of the rotor; an upper permanent magnet assembly is fixedly connected to the upper surface of the rotor, and a lower permanent magnet assembly is fixedly connected to the lower surface of the rotor, with both the lower and upper permanent magnet assemblies located within the protective plate. The outer casing includes a front stator assembly and a rear stator assembly, which are fixedly connected to the inner wall of the casing. The front and rear water-proof sleeves cover the front and rear stator assemblies. A sliding plate is slidably disposed at the bottom of the casing via a sliding assembly, and a material bladder is bonded to the surface of the sliding plate. The material bladder contains coolant, and the lower surface of the casing is also provided with heat dissipation holes for auxiliary heat dissipation. A sliding rod is slidably disposed inside the casing via a reciprocating assembly. When the sliding rod is working, it squeezes the material bladder. In addition, the material bladder is connected to the casing via a conveying hose.

[0006] Preferably, the sliding component includes a memory metal component fixedly connected to the inner wall of the housing. Initially, the memory metal component covers the heat dissipation holes, and when heated, the memory metal component unfolds to open the heat dissipation holes.

[0007] Preferably, the end of the shape memory metal component is movably connected to a rotating rod, and the surface of the rotating rod is in contact with the surface of the slide plate. The rotating rod is used to reduce the friction between the shape memory metal component and the slide plate.

[0008] Preferably, a limiting rod is fixedly connected to the bottom of the outer shell, and the front of the limiting rod is an inverted "L" structure. The sliding plate is slidably disposed on the surface of the limiting rod, and a limiting plate is fixedly connected to the end of the limiting rod. The limiting plate is used to limit the movement distance of the sliding plate.

[0009] Preferably, an auxiliary spring is fixedly connected to the surface of the limiting plate, and the other side of the auxiliary spring is fixedly connected to the inner wall of the slide plate. The front of the slide plate is an inverted "L" structure. A guide rod is fixedly connected to the surface of the slide plate, and a squeezing plate is slidably disposed on the surface of the guide rod. The surface of the squeezing plate is in contact with the surface of the material bag.

[0010] Preferably, the reciprocating assembly includes a circular plate rotatably disposed inside the housing, and a sleeve is movably disposed on the upper surface of the circular plate. In addition, a connecting spring is fixedly connected between the sleeve and the circular plate. The connecting spring is made of shape memory metal and extends when heated.

[0011] Preferably, a column is fixedly connected to the upper surface of the circular plate, and the sleeve is slidably disposed on the surface of the column. In addition, a friction block is fixedly connected to the surface of the sleeve.

[0012] Preferably, the sleeves are symmetrically distributed on both sides of the circular plate, the front stator assembly is connected to the rear stator assembly through a heat-conducting block, and the rear stator assembly is also connected to the protruding position at the bottom of the outer casing through a heat-conducting block.

[0013] Preferably, a push plate is fixedly connected to the surface of the circular plate, and the surface of the push plate is inclined, and the push plates are evenly distributed on the surface of the circular plate.

[0014] Preferably, the upper surface of the slide rod is raised, and a force-receiving roller corresponding to the push plate is movably provided at the end of the slide rod, and the slide rod is connected to the inner wall of the outer casing through a working spring.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: Employing a novel structural design, during operation, when conveying fluids at normal temperatures, the impeller rotation draws in water from the inlet of the outer casing. The fluid circulates between the front and rear water jackets and the rotor, carrying away heat from the front and rear stator assemblies and the rotor, achieving efficient heat dissipation. When conveying fluids at higher temperatures, the shape memory metal components expand, opening the heat dissipation holes. Simultaneously, the material bladder is intermittently compressed, and the coolant circulates within the outer casing and the material bladder, automatically enhancing heat exchange, delaying temperature rise, and eliminating localized overheating. This achieves highly reliable passive intelligent temperature control, the details of which are as follows:

[0016] (1) When the dual-stator axial flux electronic water pump is conveying fluid at normal temperature, the impeller rotates and draws water into the inlet of the casing. The fluid circulates between the front water jacket, the rear water jacket and the rotor, carrying away the heat of the front stator assembly, the rear stator assembly and the rotor, achieving efficient heat dissipation and making the device more stable in use.

[0017] Furthermore, when conveying fluids at higher temperatures, the shape memory metal component unfolds, opening the heat dissipation holes. Simultaneously, the shape memory metal component pushes the slide plate, causing the extrusion plate to move to the position of contact with the slide bar. At the same time, the sleeve rotates synchronously with the shaft under the action of the friction block. Consequently, the slide bar intermittently pushes the extrusion plate, and the material bag is intermittently extruded. Only then does the coolant circulate inside the outer shell and the material bag, which can automatically enhance heat exchange, delay temperature rise, and eliminate local overheating, achieving highly reliable passive intelligent temperature control.

[0018] (2) In this dual-stator axial flux electronic water pump, after the electronic coil of the front stator assembly and the stator coil of the rear stator assembly are energized, the current generates an alternating magnetic field through the stator coil. The stator yokes of the first and second yoke stators converge this magnetic field to form an axial flux. The flux passes through the air gap from the front stator assembly along the motor axis to the upper permanent magnet group of the rotor, is conducted through the rotor to the lower permanent magnet group, and then passes through the air gap back to the rear stator assembly, forming a complete closed magnetic circuit. That is, the NS type magnetic path is adopted, so that the magnetization direction of the permanent magnets on both sides of the rotor is consistent and the excitation current direction of the stator winding is consistent, thereby improving the induced electromotive force and running stability.

[0019] Furthermore, according to the law of electromagnetic induction, the axial magnetic flux interacts electromagnetically with the upper and lower permanent magnet groups of the rotor, forming a tangential electromagnetic torque that drives the rotor, shaft, and impeller to rotate synchronously. The magnitude of the electromagnetic torque is positively correlated with the air gap magnetic flux density, the number of turns of the stator coil, and the magnitude of the current. Moreover, the torque is proportional to the square of the rotor diameter. Compared with radial flux motors, higher torque output capability can be obtained with almost no increase in axial length.

[0020] (3) This dual-stator axial flux electronic water pump, relying on the independent current control capability of the front stator assembly and the rear stator assembly, can adjust the electromagnetic pull on both sides in real time according to the working conditions such as water pump lack of liquid, dry running, cavitation, and flow fluctuation, so as to actively suppress and dynamically balance the axial movement of the rotor, greatly reduce the impact and wear of rotor movement on bearings and thrust components, significantly improve the adaptability to harsh working conditions, and effectively extend the service life and operational stability of the whole machine.

[0021] Furthermore, the symmetrical electromagnetic structure of the front stator assembly and the rear stator assembly can counteract the unilateral magnetic pull and the impeller axial force, making the net axial force of the shaft approach zero. The bearings of the shaft only bear their own weight and a small residual load, avoiding long-term off-center wear and significantly reducing operating vibration and noise. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the outer shell of the present invention;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer shell of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the outer casing and the impeller of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure between the rotating shaft and the protective plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the protective plate of the present invention;

[0027] Figure 6This is a schematic diagram of the front stator assembly and the rear stator assembly of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection structure between the outer shell and the rotating shaft of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection structure between the outer shell and the shape memory metal component of the present invention;

[0030] Figure 9 This is a schematic diagram of the shape memory metal component structure of the present invention;

[0031] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point A in the middle;

[0032] Figure 11 This is a schematic diagram of the heat dissipation hole distribution structure of the present invention;

[0033] Figure 12 This is a schematic diagram of the distribution state of the positioning grooves in this invention;

[0034] Figure 13 This is a schematic diagram of the tube sleeve in a cut-out state according to the present invention;

[0035] Figure 14 This is a schematic diagram of the slide bar and auxiliary spring structure of the present invention.

[0036] In the diagram: 1. Outer shell; 2. Impeller; 3. Front water-proof sleeve; 4. Rear water-proof sleeve; 5. Shaft; 6. Protective plate; 7. Upper permanent magnet assembly; 8. Rotor; 9. Lower permanent magnet assembly; 10. Front stator assembly; 101. Electronic coil; 102. First yoke stator; 11. Rear stator assembly; 111. Stator coil; 112. Second yoke stator; 12. Shape memory metal component; 13. Limiting rod; 14. Connecting spring; 15. Slide plate; 16. Limiting plate; 17. Auxiliary spring; 18. Extrusion plate; 19. Material bladder; 20. Conveying hose; 21. Guide rod; 22. Heat dissipation hole; 23. Circular plate; 24. Slide rod; 25. Push plate; 26. Tube sleeve; 27. Column; 28. Friction block; 29. ​​Heat-conducting block. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The present invention provides the following technical solution: a dual-stator axial flux electronic water pump.

[0039] Example 1: Please refer to Figures 1-14 The system includes a housing 1 with a streamlined structure. A rotating shaft 5 is rotatably mounted inside the housing 1, and an impeller 2 is fixedly connected to the end of the rotating shaft 5. A front water-separating sleeve 3 and a rear water-separating sleeve 4 are provided on the inner wall of the housing 1. A rotor 8 is fixedly connected to the surface of the rotating shaft 5, and a protective plate 6 is provided on the outer surface of the rotor 8. An upper permanent magnet assembly 7 is fixedly connected to the upper surface of the rotor 8, and a lower permanent magnet assembly 9 is fixedly connected to the lower surface of the rotor 8. Both the upper permanent magnet assembly 7 and the lower permanent magnet assembly 7 are located inside the protective plate 6; the front stator assembly 10 and the rear stator assembly 11 are also fixedly connected to the inner wall of the outer shell 1, and the front water-proof sleeve 3 and the rear water-proof sleeve 4 cover the front stator assembly 10 and the rear stator assembly 11; the front stator assembly 10 is composed of an electronic coil 101 and a first yoke stator 102, and the first yoke stator 102 has a stator slot inside; the rear stator assembly 11 is composed of a stator coil 111 and a second yoke stator 112.

[0040] Specifically, after the protective plate 6 is installed, it covers both the lower permanent magnet assembly 9 and the upper permanent magnet assembly 7. During operation, when the electronic coil 101 of the front stator assembly 10 and the stator coil 111 of the rear stator assembly 11 are energized, the current generates an alternating magnetic field through the electronic coil 101 and the stator coil 111. The stator yokes of the first yoke stator 102 and the second yoke stator 112 converge this magnetic field to form an axial magnetic flux. The magnetic flux travels along the motor axis from the front stator assembly 10 through the air gap to the upper permanent magnet assembly 7 of the rotor 8, is conducted through the rotor 8 to the lower permanent magnet assembly 9, and then returns through the air gap to the rear stator assembly 11, forming a complete closed magnetic circuit. This adopts an NS-type magnetic path, ensuring that the magnetization direction of the permanent magnets on both sides of the rotor 8 is consistent and the direction of the excitation current of the stator winding is consistent, thereby improving the induced electromotive force and operational stability. Qualitatively, according to the law of electromagnetic induction, the axial magnetic flux interacts electromagnetically with the upper permanent magnet group 7 and the lower permanent magnet group 9 of the rotor 8, forming a tangential electromagnetic torque that drives the rotor 8, the shaft 5, and the impeller 2 to rotate synchronously. The magnitude of the electromagnetic torque is positively correlated with the air gap magnetic flux density, the number of turns of the stator coil 111, and the magnitude of the current. Furthermore, the torque is proportional to the square of the rotor 8 diameter. Compared to radial flux motors, this design achieves higher torque output with almost no increase in axial length. Both the front stator assembly 10 and the rear stator assembly 11 are disc-shaped annular structures. The stator cores inside the front stator assembly 10 and the rear stator assembly 11 are made of laminated silicon steel sheets or pressed soft magnetic composite materials. Radially distributed stator slots are formed on the end faces of the cores, and concentrated windings are embedded within these slots (e.g., ...). Figure 6 (As shown); the rotor 8 is a disc-shaped structure made of magnetic material. The upper permanent magnet group 7 and the lower permanent magnet group 9 are respectively attached and fixed to the two end faces of the rotor 8. Moreover, there are equal working air gaps between the upper permanent magnet group 7 and the front stator assembly 10, and between the lower permanent magnet group 9 and the rear stator assembly 11.

[0041] Meanwhile, relying on the independent current regulation capabilities of the front stator assembly 10 and the rear stator assembly 11, the electromagnetic pull on both sides can be adjusted in real time according to the working conditions such as water pump lack of liquid, dry running, cavitation, and flow fluctuation. This actively suppresses and dynamically balances the axial movement of the rotor 8, significantly reducing the impact and wear of the rotor 8 on the bearings and thrust components, significantly improving the adaptability to harsh working conditions, effectively extending the service life and operational stability of the whole machine. Moreover, the symmetrical electromagnetic structure of the front stator assembly 10 and the rear stator assembly 11 can offset the unilateral magnetic pull and the axial force of the impeller 2. The axial net force of the shaft 5 is close to zero, and the bearings of the shaft 5 only bear their own weight and a small residual load, avoiding long-term off-center load wear, and significantly reducing operating vibration and noise.

[0042] The sliding plate 15 is slidably mounted on the bottom of the outer shell 1 via a sliding assembly, and a material bag 19 is bonded to the surface of the sliding plate 15. The material bag 19 contains coolant. At the same time, a heat dissipation hole 22 is also provided on the lower surface of the outer shell 1 for auxiliary heat dissipation of the outer shell 1. The sliding assembly includes a shape memory metal part 12 fixedly connected to the inner wall of the outer shell 1. Initially, the shape memory metal part 12 covers the heat dissipation hole 22, and when the shape memory metal part 12 is heated, it unfolds to open the heat dissipation hole 22.

[0043] Specifically, the lower surface of the outer casing 1 has conventional vent holes to allow for normal ventilation during normal operation. During operation, when the internal temperature rises, the shape memory metal component 12 unfolds (when unfolded, the end of its inclined surface moves away from the fixed surface, and simultaneously its inclined surface rotates upwards around the fixed surface, such as...). Figure 9 As shown in the figure, the heat dissipation hole 22 is opened at this time. The heat dissipation hole 22, together with the conventional vent hole, plays a further role in efficient heat dissipation. In addition, when conveying fluid at normal temperature, the impeller 2 draws in the water flow at the inlet of the outer casing 1 when it rotates. The fluid completes the circulation between the front water jacket 3, the rear water jacket 4 and the rotor 8, and carries away the heat of the front stator assembly 10, the rear stator assembly 11 and the rotor 8, realizing efficient heat dissipation and making the overall device more stable in use.

[0044] The end of the shape memory metal part 12 is movably connected to a rotating rod, and the surface of the rotating rod is in contact with the surface of the slide plate 15. The rotating rod is used to reduce the friction between the shape memory metal part 12 and the slide plate 15.

[0045] Specifically, when the shape memory metal component 12 unfolds, the inclined surface rotates and rises. At this time, the shape memory metal component 12 will directly push the slide plate 15 through the rotating rod (e.g., Figure 9 As shown), the back of the skateboard 15 can be fitted with a force plate with an inclined surface, which makes it easy for the shape memory metal part 12 to push the force plate directly through the rotating rod when it deforms. The force plate is set with an inclined surface, which can convert the vertical upward deformation force into a horizontal thrust when it contacts the rotating rod, making it easier for the shape memory metal part 12 to push the skateboard 15.

[0046] A limiting rod 13 is fixedly connected to the bottom of the outer casing 1, and the front of the limiting rod 13 is an inverted "L" structure. A sliding plate 15 is slidably provided on the surface of the limiting rod 13. At the same time, a limiting plate 16 is fixedly connected to the end of the limiting rod 13. The limiting plate 16 is used to limit the movement distance of the sliding plate 15.

[0047] Specifically, when the skateboard 15 moves, it will slide on the surface of the limiting rod 13. The limiting rod 13 restricts the direction of movement of the skateboard 15, and the limiting plate 16 restricts the distance of movement of the skateboard 15, thus ensuring the stability of the movement of the skateboard 15.

[0048] An auxiliary spring 17 is fixedly connected to the surface of the limiting plate 16, and the other side of the auxiliary spring 17 is fixedly connected to the inner wall of the slide plate 15. The front of the slide plate 15 is an inverted "L" structure. A guide rod 21 is fixedly connected to the surface of the slide plate 15, and an extrusion plate 18 is slidably arranged on the surface of the guide rod 21. The surface of the extrusion plate 18 is in contact with the surface of the material bag 19.

[0049] Specifically, when the slide plate 15 moves, it compresses the auxiliary spring 17. As the temperature drops and the shape memory metal part 12 contracts, the slide plate 15 moves back under the action of the auxiliary spring 17, making it convenient for the next use. During normal use, the heat dissipation hole 22 is in a closed state. The heat dissipation hole 22 is only opened when efficient heat dissipation is needed, which can avoid unnecessary heat exchange under normal operating conditions. If it is always open, the external cold air will constantly impact the interior, causing local temperature drops and frequent fluctuations, disrupting the stable temperature gradient, and causing disordered heat loss. The equipment needs to consume additional energy to maintain thermal balance. Opening it as needed can maintain a stable and uniform thermal environment and achieve better thermal management. At the same time, the heat dissipation hole 22 is normally closed, which can effectively isolate external moisture and dust, protect internal components and extend their lifespan. It can also prevent disordered heat loss, reduce heat loss, maintain a stable thermal environment, and block operating noise. Opening it only when efficient heat dissipation is needed achieves a balance of protection, energy efficiency and quietness, avoiding the problems of protection failure and increased energy consumption caused by keeping it open all the time.

[0050] The slide bar 24 is slidably disposed inside the housing 1 via a reciprocating assembly. When the slide bar 24 is working, it squeezes the material bag 19. In addition, the material bag 19 is connected to the housing 1 via a conveying hose 20. The reciprocating assembly includes a circular plate 23 rotatably disposed inside the housing 1, and a sleeve 26 is movably disposed on the upper surface of the circular plate 23. Furthermore, a connecting spring 14 is fixedly connected between the sleeve 26 and the circular plate 23. The connecting spring 14 is made of shape memory metal and extends and expands when heated.

[0051] Specifically, when the internal temperature of the outer casing 1 rises, the connecting spring 14 is heated and unfolds (phase change temperature is 92°C), at which point the sleeve 26 is pushed upward.

[0052] A column 27 is fixedly connected to the upper surface of the circular plate 23, and a sleeve 26 is slidably provided on the surface of the column 27. In addition, a friction block 28 is fixedly connected to the surface of the sleeve 26.

[0053] Specifically, when the sleeve 26 is pushed upward, the column 27 restricts the direction of movement of the sleeve 26, thereby improving stability.

[0054] The sleeves 26 are symmetrically distributed on both sides of the circular plate 23. The front stator assembly 10 is connected to the rear stator assembly 11 through the heat-conducting block 29, and the rear stator assembly 11 is also connected to the bottom protrusion of the outer casing 1 through the heat-conducting block 29.

[0055] Specifically, when the sleeve 26 is pushed upward by the connecting spring 14, the sleeve 26 contacts the lower surface of the rotating shaft 5 through the friction block 28. At this time, the sleeve 26 rotates synchronously with the rotating shaft 5 under the action of friction, and the circular plate 23 will rotate synchronously. The circular plate 23 is rotatably connected to the outer shell 1 through the rotating pin, so the circular plate 23 rotates stably inside the outer shell 1 (e.g., Figure 11 and Figure 12 As shown, the circular plate 23 is connected to the bottom of the outer casing 1 by a rotating pin, which makes the circular plate 23 more stable when rotating.

[0056] A push plate 25 is fixedly connected to the surface of the circular plate 23, and the surface of the push plate 25 is inclined, and the push plates 25 are evenly distributed on the surface of the circular plate 23.

[0057] Specifically, when the circular plate 23 rotates, it will intermittently push the slide bar 24 through the push plate 25.

[0058] The upper surface of the slide bar 24 is raised, and the end of the slide bar 24 is movably provided with a force roller corresponding to the push plate 25. The slide bar 24 is connected to the inner wall of the outer casing 1 through a working spring.

[0059] Specifically, when the shape memory metal component 12 (made of the same material as the connecting spring 14, a Cu-Ni-Ti shape memory alloy, with a phase transition temperature of 85℃ and a phase transition temperature of 92℃, meaning that the shape memory metal component 12 works first during operation, allowing the slide plate 15 and material bag 19 to reach their working positions in advance, so that the slide rod 24 can directly push the extrusion plate 18 to extrude the material bag 19) unfolds and pushes the slide plate 15, the slide plate 15 drives the material bag 19 and the extrusion plate 18 to move synchronously. Finally, the extrusion plate 18 contacts the slide rod 24. When the slide rod 24 is pushed by the push plate 25, the slide rod 24 extrudes the material bag 19 (made of elastic polyurethane, with a volume of 8mL to 12mL) through the extrusion plate 18. At this time, the coolant inside the material bag 19 enters the protruding position at the bottom of the outer shell 1 through the delivery hose 20 (e.g., Figure 8As shown), when the slide bar 24 is not pushed, the material bag 19 refills and expands under the action of water pressure and its own physical rebound characteristics (as shown). Figure 11 As shown, the holes at the protruding position at the bottom of the outer shell 1 are the flow channels. When the material bladder 19 expands, the extrusion plate 18 and the slide bar 24 are squeezed by the material bladder 19 and the working spring (such as...). Figure 14 As shown, the slide bar 24 is pushed back to its original position (the protrusion on the upper surface of the slide bar 24 restricts the return position of the slide bar 24). Repeating the above process, the material bag 19 will be pushed intermittently, so that the coolant is in a state of circulation, which can automatically enhance heat exchange, delay temperature rise and eliminate local overheating, and achieve highly reliable passive intelligent temperature control. At the same time, the front stator assembly 10 is connected to the rear stator assembly 11 through the heat-conducting block 29, and the rear stator assembly 11 is also connected to the protrusion at the bottom of the outer shell 1 through the heat-conducting block 29. Thus, the front stator assembly 10 and the rear stator assembly 11 transfer heat to the bottom of the outer shell 1 through the heat-conducting block 29, so that the front stator assembly 10 and the rear stator assembly 11 can cool down better.

[0060] After the internal temperature of the outer casing 1 drops, the shape memory metal part 12 and the connecting spring 14 return to their initial positions, and the slide plate 15 returns to its initial position. At the same time, the sleeve 26 descends back to its original position under the action of the connecting spring 14, so that the circular plate 23 loses its rotational force, and the slide rod 24 stops working, making it convenient for the next use.

[0061] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-stator axial flux electronic water pump, comprising a housing (1), the housing (1) having a streamlined structure, and a rotating shaft (5) being rotatably arranged inside the housing (1), and an impeller (2) being fixedly connected to the end of the rotating shaft (5), and a front water-separating sleeve (3) and a rear water-separating sleeve (4) being arranged on the inner wall of the housing (1). The rotor (8) is fixedly connected to the surface of the rotating shaft (5), and a protective plate (6) is provided on the outer surface of the rotor (8). An upper permanent magnet assembly (7) is fixedly connected to the upper surface of the rotor (8). In addition, a lower permanent magnet assembly (9) is fixedly connected to the lower surface of the rotor (8). Both the lower permanent magnet assembly (9) and the upper permanent magnet assembly (7) are located inside the protective plate (6). A front stator assembly (10) and a rear stator assembly (11) are also fixedly connected to the inner wall of the outer shell (1). The front water-proof sleeve (3) and the rear water-proof sleeve (4) cover the front stator assembly (10) and the rear stator assembly (11). Its features are: The slide plate (15) is slidably disposed at the bottom of the outer shell (1) via a sliding component, and a material bag (19) is bonded to the surface of the slide plate (15). The material bag (19) contains coolant, and a heat dissipation hole (22) is also provided on the lower surface of the outer shell (1). The heat dissipation hole (22) is used for auxiliary heat dissipation of the outer shell (1). A slide bar (24) is slidably disposed inside the housing (1) via a reciprocating assembly. When the slide bar (24) is working, it squeezes the material bag (19). In addition, the material bag (19) is connected to the housing (1) via a delivery hose (20).

2. The dual-stator axial flux electronic water pump according to claim 1, characterized in that: The sliding component includes a memory metal part (12) fixedly connected to the inner wall of the housing (1). Initially, the memory metal part (12) covers the heat dissipation hole (22), and when heated, the memory metal part (12) unfolds, opening the heat dissipation hole (22).

3. A dual-stator axial flux electronic water pump according to claim 2, characterized in that: The end of the memory metal part (12) is movably connected to a rotating rod, and the surface of the rotating rod is in contact with the surface of the slide plate (15). The rotating rod is used to reduce the friction between the memory metal part (12) and the slide plate (15).

4. A dual-stator axial flux electronic water pump according to claim 1, characterized in that: The bottom of the outer shell (1) is fixedly connected to a limiting rod (13), and the front of the limiting rod (13) is an inverted "L" structure. The surface of the limiting rod (13) is slidably provided with the sliding plate (15). At the same time, the end of the limiting rod (13) is fixedly connected to a limiting plate (16), which is used to limit the movement distance of the sliding plate (15).

5. A dual-stator axial flux electronic water pump according to claim 4, characterized in that: An auxiliary spring (17) is fixedly connected to the surface of the limiting plate (16), and the other side of the auxiliary spring (17) is fixedly connected to the inner wall of the slide plate (15). The front of the slide plate (15) is an inverted "L" structure. A guide rod (21) is fixedly connected to the surface of the slide plate (15), and an extrusion plate (18) is slidably arranged on the surface of the guide rod (21). The surface of the extrusion plate (18) is in contact with the surface of the material bag (19).

6. A dual-stator axial flux electronic water pump according to claim 1, characterized in that: The reciprocating assembly includes a circular plate (23) rotatably disposed inside the outer shell (1), and a sleeve (26) is movably disposed on the upper surface of the circular plate (23). In addition, a connecting spring (14) is fixedly connected between the sleeve (26) and the circular plate (23). The connecting spring (14) is made of memory metal and extends when heated.

7. A dual-stator axial flux electronic water pump according to claim 6, characterized in that: A column (27) is fixedly connected to the upper surface of the circular plate (23), and the sleeve (26) is slidably disposed on the surface of the column (27). In addition, a friction block (28) is fixedly connected to the surface of the sleeve (26).

8. A dual-stator axial flux electronic water pump according to claim 6, characterized in that: The sleeve (26) is symmetrically distributed on both sides of the circular plate (23). The front stator assembly (10) is connected to the rear stator assembly (11) through the heat-conducting block (29). The rear stator assembly (11) is also connected to the bottom protrusion of the outer shell (1) through the heat-conducting block (29).

9. A dual-stator axial flux electronic water pump according to claim 6, characterized in that: The surface of the circular plate (23) is fixedly connected to a push plate (25), and the surface of the push plate (25) is inclined, and the push plates (25) are evenly distributed on the surface of the circular plate (23).

10. A dual-stator axial flux electronic water pump according to claim 9, characterized in that: The upper surface of the slide bar (24) is raised, and the end of the slide bar (24) is movably provided with a force roller corresponding to the push plate (25), and the slide bar (24) is connected to the inner wall of the outer shell (1) through a working spring.

Images