Electronic water pump

Abstract

The embodiment of the utility model relates to the technical field of electronic water pumps, and particularly discloses an electronic water pump which comprises a pump shell provided with a mounting cavity and a water inlet and a water outlet communicating with the mounting cavity; the stator assembly is arranged in the mounting cavity; the rotor assembly is rotatably arranged in the mounting cavity, a part of the rotor assembly is arranged in the stator assembly in a penetrating manner, the rotor assembly comprises a rotating shaft, a ceramic ring and a ceramic bearing, the ceramic ring is arranged on at least part of the rotating shaft in a sleeving manner, the ceramic ring and the rotating shaft are relatively fixed, the rotating shaft is connected with the ceramic bearing, the ceramic bearing is arranged on the ceramic ring in a sleeving manner, and the ceramic bearing is arranged in the ceramic ring. The ceramic ring is positioned between the ceramic bearing and the rotating shaft; the impeller is arranged in the mounting cavity, the impeller is connected with the rotor assembly, and the impeller can suck water from the water inlet and output the sucked water from the water outlet. In this way, the rotating speed of the electronic water pump can be increased, noise is reduced, and the service life of the electronic water pump is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic water pumps, in particular to an electronic water pump. BACKGROUND

[0002] As a centrifugal pump, the electronic water pump is used to rotate the impeller by the rotor assembly to suck the fluid from the water inlet and discharge the fluid from the water outlet after pressurization. With the expansion of the application range of the electronic water pump, the requirements for the bearing and the rotating shaft of the electronic water pump are getting higher and higher. In the related technology, the water pump usually adopts a stainless steel rotating shaft and a graphite bearing.

[0003] The present application relates to the technical field of electronic water pumps, in particular to an electronic water pump. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides an electronic water pump which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of the present application, an electronic water pump is provided, which comprises a pump shell provided with a mounting cavity, a water inlet and a water outlet communicating with the mounting cavity; a stator assembly arranged in the mounting cavity; a rotor assembly rotatably arranged in the mounting cavity, a part of the rotor assembly being arranged in the stator assembly, the rotor assembly comprising a rotating shaft, a ceramic ring and a ceramic bearing, the ceramic ring being sleeved on at least part of the rotating shaft, the ceramic ring being fixed relative to the rotating shaft, the rotating shaft being connected with the ceramic bearing, the ceramic bearing being sleeved on the ceramic ring, the ceramic ring being located between the ceramic bearing and the rotating shaft; and an impeller arranged in the mounting cavity, the impeller being connected with the rotor assembly, the impeller being capable of sucking water from the water inlet and outputting the sucked water from the water outlet.

[0006] In an optional manner, the ceramic bearing comprises a first bearing and a second bearing, the second bearing being arranged axially apart from the first bearing along the rotating shaft; the ceramic ring comprises a first ceramic ring and a second ceramic ring, the first ceramic ring being sleeved on one end of the rotating shaft, the second ceramic ring being sleeved on the other end of the rotating shaft, the first ceramic ring being connected with the first bearing, the second ceramic ring being connected with the second bearing, and the rotating shaft being made of stainless steel.

[0007] In an optional embodiment, a first limiting ring and a second limiting ring are also provided on the rotating shaft, the first limiting ring is sleeved on one end of the rotating shaft, the first limiting ring is connected to the side of the first ceramic ring away from the second ceramic ring, and the second limiting ring is sleeved on the other end of the rotating shaft, and the second limiting ring is connected to the side of the second ceramic ring away from the first ceramic ring.

[0008] In an optional embodiment, a first shock-absorbing pad and a second shock-absorbing pad are also provided on the rotating shaft, the first shock-absorbing pad is sleeved on one end of the rotating shaft, the first shock-absorbing pad is located between the first limiting ring and the first ceramic ring, and the second shock-absorbing pad is sleeved on the other end of the rotating shaft, and the second shock-absorbing pad is located between the second limiting ring and the second ceramic ring.

[0009] In an optional embodiment, the pump casing includes a front end cover, a pump body and a rear end cover, the front end cover is detachably connected to one end of the pump body, the rear end cover is detachably connected to the other end of the pump body, and the front end cover, pump body and rear end cover are interconnected.

[0010] In an optional manner, a first sealing ring is provided at the connection between the front end cover and the pump body, and a second sealing ring is provided at the connection between the rear end cover and the pump body.

[0011] In an optional embodiment, the water inlet and the water outlet are both located on the front end cover, and the water outlet includes a first water outlet and a second water outlet, the first water outlet and the second water outlet are axially parallel and arranged in opposite directions.

[0012] In an optional embodiment, the electronic water pump includes a control circuit board, which is arranged in the installation cavity. The control circuit board is electrically connected to the stator assembly. An external connector is also provided on the control circuit board, and a portion of the external connector extends from the installation cavity.

[0013] In an optional manner, the electronic water pump further includes a waterproof sleeve, which is mounted on the rotor assembly and located between the rotor assembly and the stator assembly.

[0014] In an optional embodiment, the electronic water pump further includes a mounting assembly, which is arranged on the outer surface of the pump housing. The mounting assembly includes a connecting ring and a mounting bracket, the connecting ring is sleeved on the outer surface of the pump housing, and the mounting bracket is connected to the connecting ring.

[0015] The beneficial effects of the embodiments of the present application are: different from the prior art, the embodiments of the present application are provided with a pump shell, a stator assembly, a rotor assembly and an impeller. Among them, the pump shell is provided with a mounting cavity and a water inlet and a water outlet communicating with the mounting cavity, the stator assembly is arranged in the mounting cavity, the rotor assembly is rotatably arranged in the mounting cavity, a part of the rotor assembly is arranged in the stator assembly, the rotor assembly includes a rotating shaft, a ceramic ring and a ceramic bearing, the ceramic ring is sleeved on at least part of the rotating shaft, the ceramic ring is fixed relative to the rotating shaft, the rotating shaft is connected with the ceramic bearing, the ceramic bearing is sleeved on the ceramic ring, the ceramic ring is located between the ceramic bearing and the rotating shaft, the impeller is arranged in the mounting cavity, the impeller is connected with the rotor assembly, the impeller can suck water from the water inlet and output the sucked water from the water outlet. In this way, the ceramic ring is arranged between the rotating shaft and the ceramic bearing, so that the friction surface between the rotating shaft and the ceramic bearing is the friction surface formed between the ceramic ring and the ceramic bearing, and the friction is between the ceramic materials. Compared with the friction between the stainless steel rotating shaft and the graphite bearing in the related art, since the friction coefficient of the ceramic material is smaller than that of the steel material, the rotating speed between the rotating shaft and the ceramic bearing can be improved, the noise is smaller, the heat generated between the rotating shaft and the ceramic bearing is smaller, the temperature rise is lower, the amount of lubricating oil can be reduced, the power consumption of the ceramic bearing is reduced, the service life of the ceramic bearing is improved, and the service life of the water pump is improved, which is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 is a whole structure of an electronic water pump according to an embodiment of the present application, and is a perspective view of the electronic water pump from another angle;

[0018] Figure 2 is a whole structure of an electronic water pump according to an embodiment of the present application, and is a perspective view of the electronic water pump from another angle;

[0019] Figure 3 is a whole structure of an electronic water pump according to an embodiment of the present application, and is a side view of the electronic water pump;

[0020] Figure 4 is a whole structure of an electronic water pump according to an embodiment of the present application, and is a side view of the electronic water pump;

[0021] Figure 5 is a whole structure of an electronic water pump according to an embodiment of the present application, and is a side view of the electronic water pump; DETAILED DESCRIPTION

[0022] In order to facilitate understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0024] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] See also Figures 1-3 The electronic water pump 1000 includes a pump housing 10, a stator assembly 20, a rotor assembly 30, an impeller 40, a control circuit board 50, a waterproof cover 60, and a mounting assembly 70. The stator assembly 20, the rotor assembly 30, the impeller 40, and the control circuit board 50 are all disposed within the pump housing 10. A portion of the rotor assembly 30 is disposed within the stator assembly 20. The waterproof cover 60 is sleeved on the rotor assembly 30 and is located between the rotor assembly 30 and the stator assembly 20. The rotor assembly 30 is connected to the impeller 40 and can drive the impeller 40 to rotate. The control circuit board 50 is electrically connected to the stator assembly 20. The mounting assembly 70 is disposed on the outer surface of the pump housing 10 and is used to achieve installation and fixation of the pump housing 10. The pump housing 10, the stator assembly 20, the rotor assembly 30, the impeller 40, the control circuit board 50, the waterproof cover 60, and the mounting assembly 70 are described in detail below.

[0026] For the above-mentioned pump housing 10 and impeller 40, as Figure 2 and Figure 3 As shown, the pump housing 10 is provided with a mounting cavity 10a, and a water inlet 10b and a water outlet 10c communicating with the mounting cavity 10a. The impeller 40 is disposed within the mounting cavity 10a. The impeller 40 can draw water from the water inlet 10b and discharge the absorbed water from the water outlet 10c. The mounting cavity 10a can be used to mount components such as the stator assembly 20, the rotor assembly 30, and the control circuit board 50.

[0027] Specifically, the pump housing 10 comprises a front end cover 101, a pump body 102, and a rear end cover 103. The front end cover 101 is detachably connected to one end of the pump body 102, and the rear end cover 103 is detachably connected to the other end of the pump body 102. The front end cover 101, the pump body 102, and the rear end cover 103 are in communication with each other. It can be understood that the detachable connection between the front end cover 101, the rear end cover 103, and the pump body 102 includes but is not limited to screwing, threaded connection, riveting, clamping, etc. In some embodiments, the front end cover 101 is provided with a first space (not indicated), the pump body 102 is provided with a second space (not indicated), and the rear end cover 103 is provided with a third space (not indicated). The first space, the second space, and the third space are in communication with each other, and the first space, the second space, and the third space combine to form the above-mentioned mounting cavity 10a.

[0028] In some embodiments, in order to improve the connection sealing between the front end cover 101 and the pump body 102, and the connection sealing between the rear end cover 103 and the pump body 102, a first sealing ring 1011 is arranged at the connection between the front end cover 101 and the pump body 102, and a second sealing ring 1031 is arranged at the connection between the rear end cover 103 and the pump body 102.

[0029] In some embodiments, the water inlet 10b and the water outlet 10c are both located on the front end cover 101, and the impeller 40 is located in the first space.

[0030] In some embodiments, the water outlet 10c comprises a first water outlet 10c1 and a second water outlet 10c2. The first water outlet 10c1 and the second water outlet 10c2 are arranged in axial parallel and opposite directions. In this way, the water sucked from the water inlet 10b can be output from the first water outlet 10c1 and / or the second water outlet 10c2, so as to realize the output of the sucked water from different water outlets 10c and in different directions, thereby facilitating the electronic water pump to adapt to different scenarios for water delivery.

[0031] For the above-mentioned stator assembly 20 and rotor assembly 30, as shown in Figure 3 and Figure 4 The stator assembly 20 is arranged in the mounting cavity 10a, and the rotor assembly 30 is rotatably arranged in the mounting cavity 10a. A part of the rotor assembly 30 penetrates into the stator assembly 20, and the rotor assembly 30 is connected with the impeller 40. The stator assembly 20 generates a magnetic field when electrified, and the rotor assembly 30 generates a magnetic field when electrified or not. The stator magnetic field and the rotor magnetic field interact under electromagnetic induction to generate torque, and then the rotor assembly 30 realizes the conversion of electric energy into mechanical energy, thereby driving the impeller 40 to rotate.

[0032] In some embodiments, please refer to Figure 5The rotor assembly 30 comprises a rotating shaft 301, a ceramic ring 302 and a ceramic bearing 303. The ceramic ring 302 is sleeved on at least part of the rotating shaft 301 and is fixed relative to the rotating shaft 301. The rotating shaft 301 is connected with the ceramic bearing 303. The ceramic ring 302 is sleeved on the ceramic bearing 303. The ceramic ring 302 is located between the ceramic bearing 303 and the rotating shaft 301. The ceramic ring 302 is arranged between the rotating shaft 301 and the ceramic bearing 303, so that the friction surface between the rotating shaft 301 and the ceramic bearing 303 is the friction surface formed between the ceramic ring 302 and the ceramic bearing 303. The friction surface is the friction between ceramic materials. Compared with the friction between the stainless steel rotating shaft and the graphite bearing in the related art, the rotating speed between the rotating shaft 301 and the ceramic bearing 303 can be improved, the noise is smaller, the heat generated between the rotating shaft 301 and the ceramic bearing 303 is smaller, the temperature rise is lower, the amount of lubricating oil can be reduced, the power consumption of the ceramic bearing 303 is reduced, the service life of the ceramic bearing 303 is improved, and the service life of the water pump is improved. It can be understood that: in order to realize the relative fixation between the rotating shaft 301 and the ceramic ring 302, the connection mode of the ceramic ring 302 and the rotating shaft 301 includes but is not limited to key connection, welding, clamping, interference fit, threaded connection and the like. In some embodiments, the rotating shaft 301 is made of stainless steel.

[0033] In some embodiments, the ceramic bearing 303 comprises a first bearing 3031 and a second bearing 3032. The second bearing 3032 is arranged axially along the rotating shaft 301 and is spaced apart from the first bearing 3031. The ceramic ring 302 comprises a first ceramic ring 3021 and a second ceramic ring 3022. The first ceramic ring 3021 is sleeved on one end of the rotating shaft 301. The second ceramic ring 3022 is sleeved on the other end of the rotating shaft 301. The first ceramic ring 3021 is connected with the first bearing 3031. The second ceramic ring 3022 is connected with the second bearing 3032. In this way, the rotation between the rotating shaft 301 and the ceramic bearing 303 can be more stable.

[0034] In some embodiments, in order to limit and fix the first bearing 3031 and the second bearing 3032, the rotor assembly 30 further comprises two fixing rings 304. One fixing ring 304 is sleeved on the first bearing 3031 and abuts against the inner wall of the pump shell 10. The other fixing ring 304 is sleeved on the second bearing 3032 and abuts against the inner wall of the pump shell 10. In order to reduce the vibration of the first bearing 3031 and the second bearing 3032, a damping ring 3041 is further arranged between the first bearing 3031 and the fixing ring 304 and between the second bearing 3032 and the fixing ring 304.

[0035] In some embodiments, the rotating shaft 301 is further provided with a first limiting ring 3011 and a second limiting ring 3012, the first limiting ring 3011 is sleeved on one end of the rotating shaft 301, the second limiting ring 3012 is sleeved on the other end of the rotating shaft 301, the first limiting ring 3011 is connected to the side of the first ceramic ring 3021 away from the second ceramic ring 3022, and the second limiting ring 3012 is connected to the side of the second ceramic ring 3022 away from the first ceramic ring 3021. The first limiting ring 3011 can be used to limit the movement of the first ceramic ring 3021 in the axial direction of the rotating shaft 301, and the second limiting ring 3012 can be used to limit the movement of the second ceramic ring 3022 in the axial direction of the rotating shaft 301.

[0036] In some embodiments, the rotating shaft 301 is further provided with a first damping pad 3013 and a second damping pad 3014, the first damping pad 3013 is sleeved on one end of the rotating shaft 301, the first damping pad 3013 is located between the first limiting ring 3011 and the first ceramic ring 3021, the second damping pad 3014 is sleeved on the other end of the rotating shaft 301, and the second damping pad 3014 is located between the second limiting ring 3012 and the second ceramic ring 3022. The first damping pad 3013 can reduce the vibration of the first ceramic ring 3021 in the axial direction of the rotating shaft 301, and the second damping pad 3014 can reduce the vibration of the second ceramic ring 3022 in the axial direction of the rotating shaft 301.

[0037] For the above-mentioned control circuit board 50, as shown in Figure 2 and Figure 3 , the control circuit board 50 is arranged in the mounting cavity 10a, the control circuit board 50 is electrically connected with the stator assembly 20, the control circuit board 50 is further provided with an external connector 501, part of the external connector 501 extends out of the mounting cavity 10a, the control circuit board 50 can be used to control the opening or closing of the stator assembly 20, and the external connector 501 can be used to connect with a power supply device or other electronic devices, so as to control or charge the control circuit board 50.

[0038] For the above-mentioned waterproof sleeve 60 and the mounting assembly 70, as shown in Figure 1 and Figure 3As shown, the waterproof sleeve 60 is sleeved on the rotor assembly 30, the waterproof sleeve 60 is located between the rotor assembly 30 and the stator assembly 20, the waterproof sleeve 60 can play a waterproof role, reduce the influence of external water on the stator assembly 20, the mounting assembly 70 is arranged on the outer surface of the pump shell 10, the mounting assembly 70 includes a connecting ring 701 and a mounting bracket 702, the connecting ring 701 is sleeved on the outer surface of the pump shell 10, the mounting bracket 702 is connected with the connecting ring 701, the connecting ring 701 realizes fixing the mounting bracket 702 on the outer surface of the pump shell 10, the mounting bracket 702 can be used for connecting other devices to be installed on the electronic water pump, the mounting bracket 702 is provided with a connecting through hole 7021, the connecting through hole 7021 cooperates with the screw, so that the electronic water pump is fixed on the device.

[0039] In the embodiment of the present application, the pump shell 10, the stator assembly 20, the rotor assembly 30 and the impeller 40 are provided. The pump shell 10 is provided with a mounting cavity 10a and a water inlet 10b and a water outlet 10c communicating with the mounting cavity 10a, the stator assembly 20 is arranged in the mounting cavity 10a, the rotor assembly 30 is rotatably arranged in the mounting cavity 10a, a part of the rotor assembly 30 penetrates into the stator assembly 20, the rotor assembly 30 includes a rotating shaft 301, a ceramic ring 302 and a ceramic bearing 303, the ceramic ring 302 is sleeved on at least part of the rotating shaft 301, the rotating shaft 301 is connected with the ceramic bearing 303, the ceramic bearing 303 is sleeved on the ceramic ring 302, the ceramic ring 302 is located between the ceramic bearing 303 and the rotating shaft 301, the impeller 40 is arranged in the mounting cavity 10a, the impeller 40 is connected with the rotor assembly 30, the impeller 40 can suck water from the water inlet 10b and output the sucked water from the water outlet 10c. In this way, the ceramic ring 302 is arranged between the rotating shaft 301 and the ceramic bearing 303, so that the friction surface between the rotating shaft 301 and the ceramic bearing 303 is the friction surface formed between the ceramic ring 302 and the ceramic bearing 303, and the friction surface is the friction between the ceramic materials. Compared with the friction between the stainless steel rotating shaft and the graphite bearing in the related art, since the friction coefficient of the ceramic material is smaller than that of the steel material, the rotating speed between the rotating shaft 301 and the ceramic bearing 303 can be improved, the noise is smaller, the heat generated between the rotating shaft 301 and the ceramic bearing 303 is smaller, the temperature rise is lower, the amount of lubricating oil can be reduced, the power consumption of the ceramic bearing 303 is reduced, the service life of the ceramic bearing 303 is improved, and the service life of the water pump is improved, which is more convenient.

[0040] The above only describes the embodiments of the present application, and does not limit the patent scope of the present application, any equivalent structure or equivalent process transformation obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electronic water pump, characterized in that: include: A pump housing is provided with a mounting cavity and a water inlet and a water outlet communicating with the mounting cavity; a stator assembly, disposed in the mounting cavity; a rotor assembly rotatably disposed in the mounting cavity, a portion of the rotor assembly being disposed within the stator assembly, the rotor assembly comprising a rotating shaft, a ceramic ring, and a ceramic bearing, the ceramic ring being sleeved around at least a portion of the rotating shaft, the ceramic ring being relatively fixed to the rotating shaft, the rotating shaft being connected to the ceramic bearing, the ceramic bearing being sleeved around the ceramic ring, and the ceramic ring being located between the ceramic bearing and the rotating shaft; An impeller is disposed in the mounting cavity, the impeller is connected to the rotor assembly, and the impeller can absorb water from the water inlet and output the absorbed water from the water outlet.

2. The electronic water pump according to claim 1, characterized in that: The ceramic bearing includes a first bearing and a second bearing, wherein the second bearing and the first bearing are spaced apart from each other along the axial direction of the rotating shaft; The ceramic ring includes a first ceramic ring and a second ceramic ring, the first ceramic ring is sleeved on one end of the rotating shaft, the second ceramic ring is sleeved on the other end of the rotating shaft, the first ceramic ring is connected to the first bearing, and the second ceramic ring is connected to the second bearing; The rotating shaft is made of stainless steel.

3. The electronic water pump according to claim 2, characterized in that: A first limiting ring and a second limiting ring are also provided on the rotating shaft. The first limiting ring is sleeved on one end of the rotating shaft and connected to the side of the first ceramic ring facing away from the second ceramic ring. The second limiting ring is sleeved on the other end of the rotating shaft and connected to the side of the second ceramic ring facing away from the first ceramic ring.

4. The electronic water pump according to claim 3, characterized in that: A first shock-absorbing pad and a second shock-absorbing pad are also provided on the rotating shaft. The first shock-absorbing pad is sleeved on one end of the rotating shaft, and the first shock-absorbing pad is located between the first limiting ring and the first ceramic ring. The second shock-absorbing pad is sleeved on the other end of the rotating shaft, and the second shock-absorbing pad is located between the second limiting ring and the second ceramic ring.

5. The electronic water pump according to claim 1, characterized in that: The pump casing includes a front end cover, a pump body and a rear end cover. The front end cover is detachably connected to one end of the pump body, and the rear end cover is detachably connected to the other end of the pump body. The front end cover, the pump body and the rear end cover are interconnected.

6. The electronic water pump according to claim 5, characterized in that: A first sealing ring is provided at the connection between the front end cover and the pump body, and a second sealing ring is provided at the connection between the rear end cover and the pump body.

7. The electronic water pump according to claim 5, characterized in that: The water inlet and the water outlet are both located on the front end cover. The water outlet includes a first water outlet and a second water outlet. The first water outlet and the second water outlet are axially parallel and arranged in opposite directions.

8. The electronic water pump according to claim 1, characterized in that: The electronic water pump includes a control circuit board, which is arranged in the installation cavity and electrically connected to the stator assembly. An external connector is also provided on the control circuit board, and a portion of the external connector extends from the installation cavity.

9. The electronic water pump according to claim 1, characterized in that: The electronic water pump further includes a waterproof sleeve, which is sleeved on the rotor assembly and located between the rotor assembly and the stator assembly.

10. The electronic water pump according to claim 1, characterized in that: The electronic water pump further comprises a mounting assembly, which is arranged on the outer surface of the pump housing. The mounting assembly comprises a connecting ring and a mounting bracket, the connecting ring is sleeved on the outer surface of the pump housing, and the mounting bracket is connected to the connecting ring.

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