Self-cooling electronic water pump and automobile

Abstract

The utility model discloses a self-cooling electronic water pump and an automobile, and the self-cooling electronic water pump comprises a stator assembly which is located in a shell and matched with a rotor, the stator assembly comprises stators distributed on the inner wall of the shell in the circumferential direction of the rotor and a liquid separation sleeve arranged on the periphery of the rotor in a sleeving mode, the liquid separation sleeve is located between the rotor and the stators, and one end of the liquid separation sleeve is in sealed connection with the shell; the cover plate is located in the shell, hermetically connected with the inner wall of the shell and used for supporting the rotor to stably rotate, and the other end of the liquid separation sleeve is hermetically connected with the cover plate; the rear cover is buckled to the rear end of the shell in a sealed mode, the rear cover and the cover plate are arranged at intervals, and the space between the rear cover and the cover plate is filled with insulating cooling liquid; wherein the liquid isolation sleeve is used for isolating the rotor and the stator in a rotor cavity and a stator cavity which are relatively sealed, and a through hole communicated with the stator cavity is formed in the cover plate, so that the insulating cooling liquid enters the stator cavity. The self-cooling efficiency of the electronic water pump can be greatly improved, meanwhile, the influence of vibration on internal components of the electronic water pump is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a self-cooling electronic water pump. In addition, the present application also relates to an automobile comprising the self-cooling electronic water pump. Background Art

[0002] In the field of new energy vehicles, electronic water pumps have gradually replaced traditional mechanical water pumps, delivering coolant to the vehicle's thermal management system, taking away most of the heat generated by the vehicle's drive motor, battery and control module, and providing thermal fluid for the heater system, ensuring that the vehicle's electric drive system is in the optimal operating temperature range and improving the reliability and safety of new energy vehicles.

[0003] In existing automotive electronic water pumps, the heat dissipation of the water pump is often achieved through air circulation, but the heat dissipation effect does not meet expectations. During operation, a large amount of heat accumulates in the housing of the automotive electronic water pump, which seriously affects the working efficiency of the electronic water pump. The electronic water pump operates under high temperature conditions for a long time, resulting in rapid aging of the water pump and a short service life. In severe cases, the circuit board of the electronic water pump may be burned. Therefore, self-cooling of the automotive electronic water pump is particularly important.

[0004] Therefore, in view of the above technical problems, how to realize the self-cooling function of the electronic water pump and have a higher heat dissipation efficiency is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0005] The purpose of the present application is to provide a self-cooling electronic water pump, which greatly improves the heat dissipation efficiency of PCBA (printed circuit board), rotor and stator by injecting insulating coolant into the interior of the electronic water pump. At the same time, the insulating coolant can also play a certain buffering role on the internal components and reduce the impact of vibration on the components.

[0006] To achieve the above object, the present application provides a self-cooling electronic water pump, comprising a housing and a rotor disposed in the housing, and further comprising:

[0007] A stator assembly, located inside the housing and matched with the rotor, comprising stators distributed on the inner wall of the housing along the circumference of the rotor and a liquid-isolating sleeve sleeved on the outer circumference of the rotor, the liquid-isolating sleeve being located between the rotor and the stator, and one end of the liquid-isolating sleeve being sealed and connected to the housing;

[0008] A cover plate is located inside the shell and is sealed to the inner wall of the shell, and is used to support the rotor to rotate stably. The other end of the liquid isolation sleeve is sealed to the cover plate.

[0009] A rear cover is sealed and buckled at the rear end of the housing, the rear cover and the cover plate are spaced apart, and an insulating coolant is filled between the rear cover and the cover plate;

[0010] The liquid isolation sleeve is used to isolate the rotor and the stator in relatively sealed rotor and stator cavities, and the cover plate is provided with a through hole communicating with the stator cavity so that the insulating coolant can enter the stator cavity.

[0011] Preferably, the outer surface of the stator is coated with high temperature resistant structural adhesive, and the stator is installed in the shell after high frequency heating. After the high temperature resistant structural adhesive is cured, the stator is fixedly connected to the shell.

[0012] Preferably, the rotor is provided with a transmission shaft with one end extending out of the outer shell, a first bearing for supporting its rotation is provided at the junction of the transmission shaft and the outer shell, and the other end of the transmission shaft is rotatably arranged on the cover plate through a second bearing.

[0013] Preferably, an impeller is provided on the transmission shaft extending out of the outer casing, and a volute connected to the outer casing is sleeved on the outer side of the impeller.

[0014] Preferably, the volute is limitedly engaged with the outer shell by a first retaining spring, and a first sealing ring is provided between the inner wall of the volute and the outer wall of the outer shell to maintain sealing between the two.

[0015] Preferably, the cover plate is limitedly clamped in the shell by a second clamping spring, and a second sealing ring is provided between the outer wall of the cover plate and the inner wall of the shell to keep the two sealed.

[0016] Preferably, a PCBA board electrically connected to the rotor and the stator is fixedly disposed on the cover plate, and the PCBA board is immersed in the insulating coolant between the rear cover and the cover plate.

[0017] Preferably, a female plug electrically connected to the PCBA board is fixed on the outside of the housing, and the female plug cooperates with an external power plug to provide electrical energy to the PCBA board.

[0018] Preferably, the rear cover is connected to the outer shell by riveting, and a third sealing ring is provided between the rear cover and the outer shell to keep the two sealed.

[0019] An automobile comprises any one of the self-cooling electronic water pumps described above.

[0020] Compared with the above background technology, the present application uses a liquid-isolating sleeve to isolate the rotor and stator in relatively sealed rotor and stator cavities, respectively. Under the premise of not affecting the rotation of the rotor, the insulating coolant in the stator cavity can effectively dissipate the heat of the rotor and stator, and the PCBA board is also in the insulating coolant, which also has a high heat dissipation efficiency. In addition, due to the filling of the insulating coolant, some components inside the housing can play a certain vibration reduction role under the action of the insulating coolant, protect the internal components, and extend the service life.

[0021] Specifically, the electronic water pump includes a housing, a rotor, a stator assembly, a cover plate and a back cover, wherein the rotor is rotatably arranged inside the housing; the stator assembly is located inside the housing and cooperates with the rotor, including a stator distributed on the inner wall of the housing along the circumference of the rotor and a liquid-isolating sleeve sleeved on the outer periphery of the rotor, and the liquid-isolating sleeve is located between the rotor and the stator, and one end of the liquid-isolating sleeve is sealed and connected to the housing; the cover plate is also located inside the housing and is sealed and connected to the inner wall of the housing to support the stable rotation of the rotor, and the other end of the liquid-isolating sleeve is sealed and connected to the cover plate, thereby isolating the rotor and the stator in a relatively sealed rotor cavity and stator cavity. At the same time, a through hole connected to the stator cavity is provided on the cover plate, the back cover is sealed and buckled at the rear end of the housing, the back cover and the cover plate are spaced apart, and an insulating coolant is filled between the back cover and the cover plate, and the insulating coolant can enter the stator cavity through the through hole, thereby realizing direct heat dissipation of internal components, improving cooling efficiency, and reducing the impact of vibration on internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A cross-sectional view of a self-cooling electronic water pump provided in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the stator cavity and rotor cavity structure provided in an embodiment of the present application.

[0025] In the figure: 1, volute 2, impeller 3, first sealing ring 4, first retaining spring 5, housing 6, stator 7, rotor 8, transmission shaft 9, second bearing 10, cover plate 11, female plug 12, back cover 13, third sealing ring 14, PCBA board 15, second sealing ring 16, second retaining spring 17, fluid isolation sleeve 18, first bearing 19, stator cavity 20, rotor cavity. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figure 1 As shown, in this embodiment, a self-cooling electronic water pump is provided, which includes a housing 5, a rotor 7, a stator assembly, a cover plate 10 and a back cover 12. The housing 5 and the rotor 7 can be components in the prior art, and there are no excessive restrictions on the two, and it is sufficient to ensure that the rotor 7 can be rotatably set in the housing 5.

[0030] The stator assembly is located inside the housing 5, and includes a stator 6 that cooperates with the rotor 7. The stator 6 is distributed on the inner wall of the housing 5 along the circumference of the rotor 7, so as to drive the rotor 7 to rotate. The stator assembly also includes a liquid isolation sleeve 17 sleeved on the outer circumference of the rotor 7, the liquid isolation sleeve 17 is located between the rotor 7 and the stator 6, and one end of the liquid isolation sleeve 17 is sealed and connected to the housing 5.

[0031] It should be noted that, due to the specific structure of the rotor 7, the liquid isolation sleeve 17 can be set as a hollow columnar structure, so as to be sleeved on the outer periphery of the rotor 7; of course, the setting of the liquid isolation sleeve 17 does not affect the cooperation between the rotor 7 and the stator 6, thereby ensuring that the rotor 7 can rotate stably with the cooperation of the stator 6.

[0032] The cover plate 10 is also located in the housing 5 and is sealed to the inner wall of the housing 5. The cover plate 10 is used to support the rotor 7 to rotate stably on the one hand, and needs to be sealed to the other end of the liquid isolation sleeve 17 on the other hand, so as to isolate the rotor 7 and the stator 6 in the relatively sealed rotor cavity 20 and stator cavity 19 respectively. For details, please refer to Figure 2 .

[0033] In addition, there can be a variety of sealing arrangements for the liquid isolating sleeve 17. The present application provides an implementation method in which sealing rings are provided at the connections between the outer shell 5 and the cover plate 10 and the liquid isolating sleeve 17. The sealing performance at both ends of the liquid isolating sleeve 17 is ensured through the interference fit between the sealing ring and the liquid isolating sleeve 17, thereby ensuring the relative sealing of the rotor cavity 20 and the stator cavity 19.

[0034] The rear cover 12 is sealed and buckled at the rear end of the housing 5. The rear cover 12 and the cover plate 10 are spaced apart, and the insulating coolant is filled between the rear cover 12 and the cover plate 10. It should be noted that a through hole communicating with the stator cavity 19 is also provided on the cover plate 10, so that the insulating coolant can enter the stator cavity 19 through the through hole. The stator cavity 19 and the rotor cavity 20 are relatively sealed, so the insulating coolant does not affect the rotation of the rotor 7, thereby greatly improving the cooling efficiency of the electronic water pump.

[0035] It should be pointed out that the insulating coolant can be dimethyl silicone oil, ultrapure water or electronic fluorinated liquid, etc., as long as it has insulating properties and can achieve the cooling purpose. No more restrictions are made here.

[0036] In summary of the above embodiments, the present application uses the liquid isolation sleeve 17 to isolate the rotor 7 and the stator 6 in the relatively sealed rotor cavity 20 and the stator cavity 19, respectively. Under the premise of not affecting the rotation of the rotor 7, the insulating coolant in the stator cavity 19 can effectively dissipate the heat of the rotor 7 and the stator 6, and the PCBA board 14 is also in the insulating coolant, and also has a high heat dissipation efficiency. In addition, due to the filling of the insulating coolant, some components inside the housing 5 can play a certain vibration reduction role under the action of the insulating coolant, protect the internal components, and extend the service life.

[0037] The present application adopts a high-frequency heating assembly method to fix the stator 6 on the housing 5, that is, a high-temperature resistant structural adhesive is coated on the outer surface of the stator 6, and after the housing 5 is heated to a certain degree, the stator is installed in the housing 5, and the high-temperature resistant structural adhesive is cured to fix the stator 6 on the housing 5. Of course, there can be many ways to fix the stator 6, including but not limited to the above-mentioned fixing methods, which will not be described in detail here, and all fall within the protection scope of the present application.

[0038] Please refer to Figure 1 A transmission shaft 8 with one end extending out of the outer shell 5 is provided on the rotor 7. In order to ensure the stable rotation of the transmission shaft 8, a first bearing 18 for supporting its rotation is provided at the junction of the transmission shaft 8 and the outer shell 5. The other end of the transmission shaft 8 is rotatably set on the cover plate 10 through a second bearing 10.

[0039] Similar to the prior art, an impeller 2 is provided on the transmission shaft 8 extending out of the outer casing 5, and a volute 1 connected to the outer casing 5 is sleeved on the outer side of the impeller 2. The functions of the impeller 2 and the volute 1 are not described here in detail, and reference may be made to the prior art.

[0040] It should be noted that, in this embodiment, the volute 1 is limitedly engaged with the outer shell 5 by a first retaining spring 4, and a first sealing ring 3 is provided between the inner wall of the volute 1 and the outer wall of the outer shell 5 to keep the two sealed to prevent liquid leakage at the connection between the two.

[0041] The cover plate 10 is limitedly clamped in the outer shell 5 by a second clamping spring 16 , and a second sealing ring 15 is provided between the outer wall of the cover plate 10 and the inner wall of the outer shell 5 to keep the two sealed.

[0042] Generally speaking, the PCBA board 14 of the electronic water pump is located in the housing 5. In this embodiment, the PCBA board 14 is fixed on the cover plate 10, and the PCBA board 14 is electrically connected to the rotor 7 and the stator 6 to provide electrical energy to both.

[0043] Since the insulating coolant is filled between the back cover 12 and the cover plate 10 , the PCBA board 14 will be immersed in the insulating coolant, which can dissipate the heat of the PCBA board 14 and reduce the impact of vibration on the PCBA board 14 .

[0044] Please refer to Figure 1 A female plug 11 electrically connected to the PCBA board 14 is fixed on the outer side of the housing 5. The female plug 11 cooperates with the external power plug to provide power to the PCBA board 14. As for the specific setting of the female plug 11 and the connection between the female plug 11 and the PCBA board 14, reference can be made to the prior art and will not be repeated here.

[0045] It is pointed out above that the rear cover 12 is sealed to the housing 5. Here, the rear cover 12 is connected to the housing 5 by riveting, and a third sealing ring 13 is provided between the rear cover 12 and the housing 5 to keep the two sealed, thereby ensuring that the insulating coolant does not leak.

[0046] The present application also provides a car, which includes any of the self-cooling electronic water pumps described above, and also includes other necessary components that make up the car, which will not be described here in detail and can be referred to the prior art.

[0047] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0048] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A self-cooling electronic water pump, comprising a housing and a rotor disposed in the housing, characterized in that: Also includes: A stator assembly, located inside the housing and matched with the rotor, comprising stators distributed on the inner wall of the housing along the circumference of the rotor and a liquid-isolating sleeve sleeved on the outer circumference of the rotor, the liquid-isolating sleeve being located between the rotor and the stator, and one end of the liquid-isolating sleeve being sealed and connected to the housing; A cover plate is located inside the shell and is sealed to the inner wall of the shell, and is used to support the rotor to rotate stably. The other end of the liquid isolation sleeve is sealed to the cover plate. A rear cover is sealed and buckled at the rear end of the housing, the rear cover and the cover plate are spaced apart, and an insulating coolant is filled between the rear cover and the cover plate; The liquid isolation sleeve is used to isolate the rotor and the stator in relatively sealed rotor and stator cavities, and the cover plate is provided with a through hole communicating with the stator cavity so that the insulating coolant can enter the stator cavity.

2. The self-cooling electronic water pump according to claim 1, characterized in that: The outer surface of the stator is coated with high temperature resistant structural adhesive, and the stator is installed in the shell after high frequency heating. After the high temperature resistant structural adhesive is cured, the stator is fixedly connected to the shell.

3. The self-cooling electronic water pump according to claim 1, characterized in that: The rotor is provided with a transmission shaft with one end extending out of the outer shell, a first bearing for supporting the rotation of the transmission shaft is provided at the junction of the transmission shaft and the outer shell, and the other end of the transmission shaft is rotatably arranged on the cover plate through a second bearing.

4. The self-cooling electronic water pump according to claim 3, characterized in that: An impeller is arranged on the transmission shaft extending out of the outer shell, and a volute connected to the outer shell is sleeved on the outer side of the impeller.

5. The self-cooling electronic water pump according to claim 4, characterized in that: The volute is limitedly engaged with the outer shell by a first clamping spring, and a first sealing ring is provided between the inner wall of the volute and the outer wall of the outer shell to keep the two sealed.

6. The self-cooling electronic water pump according to claim 1, characterized in that: The cover plate is limitedly clamped in the shell by a second clamping spring, and a second sealing ring is arranged between the outer wall of the cover plate and the inner wall of the shell to keep the two sealed.

7. The self-cooling electronic water pump according to claim 1, characterized in that: A PCBA board electrically connected to the rotor and the stator is fixedly arranged on the cover plate, and the PCBA board is immersed in the insulating coolant between the rear cover and the cover plate.

8. The self-cooling electronic water pump according to claim 7, characterized in that: A female plug electrically connected to the PCBA board is fixed on the outside of the shell, and the female plug cooperates with an external power plug to provide electrical energy to the PCBA board.

9. The self-cooling electronic water pump according to claim 1, characterized in that: The rear cover is connected to the outer shell by riveting, and a third sealing ring is arranged between the rear cover and the outer shell to keep the two sealed.

10. An automobile, characterized in that: It comprises the self-cooling electronic water pump as described in any one of claims 1 to 9.

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