CN220748620U - Rear end cover assembly and electronic water pump using same - Google Patents
Rear end cover assembly and electronic water pump using same Download PDFInfo
- Publication number
- CN220748620U CN220748620U CN202322234089.5U CN202322234089U CN220748620U CN 220748620 U CN220748620 U CN 220748620U CN 202322234089 U CN202322234089 U CN 202322234089U CN 220748620 U CN220748620 U CN 220748620U
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- CN
- China
- Prior art keywords
- rear end
- end cover
- cover body
- pump shell
- circuit board
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000002955 isolation Methods 0.000 claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a rear end cover assembly and an electronic water pump using the same, and relates to the technical field of water pumps and parts thereof, wherein the rear end cover assembly comprises a rear end cover body; one side of the rear end cover body is provided with a circuit board contact surface which is suitable for being contacted with a control circuit board of the electronic water pump and can exchange heat with the control circuit board; the other side of the rear end cover body is provided with a pump shell mounting surface which is at least suitable for mounting a pump shell of the electronic water pump and closing the open end of the pump shell so as to form a rotor chamber in the pump shell; the pump housing mounting surface is capable of heat exchange with a liquid medium flowing in the rotor chamber. The utility model mainly solves the problem of how to control the heat dissipation requirement of the circuit board; the heat emitted by the control circuit board is conducted to the liquid medium flowing in the rotor chamber through the rear end cover body and the isolation seat in sequence, so that the heat emitted by the control circuit board is taken away rapidly through the circulation of the liquid medium, and the efficient heat dissipation of the control circuit board is realized.
Description
Technical Field
The utility model relates to the technical field of water pumps and parts thereof, in particular to a rear end cover assembly and an electronic water pump using the same.
Background
The electronic water pump has higher output efficiency and can realize accurate flow control, so that the electronic water pump is widely applied to automobiles, household appliances and industrial equipment, and especially, a new energy automobile is generally provided with two or more electronic water pumps, the electronic water pumps are power sources of the whole cooling system of the new energy automobile, and power batteries, driving motors and the like of the new energy automobile all need to drive cooling liquid to be cooled circularly by means of the electronic water pumps.
The main control circuit board of the electronic water pump is used for driving the stator assembly to operate, and is provided with a main control, a power electronic device used for driving the stator assembly to operate and other peripheral circuits, so that the main control circuit board belongs to a part with larger heating value.
In order to dissipate heat of a main control circuit board of an electronic water pump, the following arrangements are generally adopted in the prior art:
a metal end cover with radiating fins or radiating columns is arranged at one end of the electronic water pump, a control circuit board is arranged close to the end cover, and heat exchange between the control circuit board and the metal end cover is realized through heat conduction silicone grease or other heat conduction media, so that heat is radiated to the outside air of the electronic water pump through the radiating fins or the radiating columns of the metal end cover.
However, the heat exchange efficiency is low by adopting the natural convection heat dissipation mode, and the heat dissipation requirement of the high-power control circuit board is difficult to meet.
Disclosure of Invention
The utility model aims to provide a rear end cover assembly and an electronic water pump using the same, which can radiate heat for a control circuit board of the electronic water pump through liquid medium flowing in a rotor chamber.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a rear end cover assembly, applied to an electronic water pump, comprises a rear end cover body; one side of the rear end cover body is provided with a circuit board contact surface which is suitable for being contacted with a control circuit board of the electronic water pump and can exchange heat with the control circuit board; the other side of the rear end cover body is provided with a pump shell mounting surface which is at least suitable for mounting a pump shell of the electronic water pump and closing the open end of the pump shell so as to form a rotor chamber in the pump shell; the pump housing mounting surface is capable of heat exchange with a liquid medium flowing in the rotor chamber.
In the technical scheme, the rear end cover body is provided with a plurality of screw holes; after passing through the screw holes, the screws are locked into the pump shell, so that the pump shell is mounted on the pump shell mounting surface of the rear end cover body.
In the technical scheme, the rear end cover assembly further comprises an isolation seat with heat conducting performance and corrosion resisting performance; the isolation seat comprises a plate-shaped base; an isolation seat embedding groove matched with the base of the isolation seat is formed on the pump shell mounting surface of the rear end cover body, and the base of the isolation seat is embedded into the isolation seat embedding groove of the rear end cover body; the isolation seat is used for closing the opening end of the pump shell and is contacted with the liquid medium flowing in the rotor chamber, and the heat of the control circuit board can be conducted to the liquid medium flowing in the rotor chamber through the rear end cover body and the isolation seat in sequence.
In the above technical scheme, a heat-conducting medium is arranged between the base of the isolation seat and the isolation seat caulking groove of the rear end cover body.
In the above technical scheme, the base of the isolation seat is pressed into the isolation seat caulking groove of the rear end cover body by a pressurizing process, and is in interference fit with each other.
In the technical scheme, a circle of pump shell sealing wall is formed on the base of the isolation seat; the pump shell is arranged behind the pump shell mounting surface of the rear end cover body, and the pump shell sealing wall abuts against the inner wall of the pump shell.
In the technical scheme, the base of the isolation seat also forms a bearing embedded seat on the inner periphery of the sealing wall of the ring pump shell; the bearing of the electronic water pump can be embedded in the bearing embedding seat.
An electronic water pump comprises the rear end cover assembly.
Compared with the prior art, the utility model has the beneficial effects that: according to the rear end cover assembly and the electronic water pump using the same, the heat emitted by the control circuit board is conducted to the liquid medium flowing in the rotor chamber through the rear end cover body and the isolation seat in sequence, so that the heat emitted by the control circuit board is taken away rapidly through the circulation of the liquid medium, the efficient heat dissipation of the control circuit board is realized, and in addition, the isolation seat with corrosion resistance is in direct contact with the liquid medium, so that the rear end cover body can be effectively prevented from being corroded by the electrochemical of the liquid medium, and further the risks of locking of the rotor assembly and loosening of the bearing are avoided.
Drawings
Fig. 1 is one of the perspective views of the present utility model.
Fig. 2 is a second perspective view of the present utility model.
Fig. 3 is an exploded view of the present utility model.
Fig. 4 is a cross-sectional view of an electronic water pump in the present utility model.
The reference numerals are: 1. a rear end cap body; 101. a circuit board contact surface; 102. a pump housing mounting surface; 103. an isolation seat caulking groove; 104. screw holes; 2. a separation seat; 201. a base; 202. the bearing is embedded into the seat; 203. a pump housing seal wall; 3. a bearing; 4. a control circuit board; 5. a rear housing; 6. a pump housing; 61. a rotor chamber; 7. and a shaft core.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment provides a rear end cover assembly which is applied to an electronic water pump, is used as a rear end cover of the electronic water pump, and is used as one of structures of an electronic control box of the electronic water pump.
Referring to fig. 1 to 4, the rear end cap assembly of the present embodiment includes a rear end cap body 1.
The rear end cap body 1 is an integrally formed metal cap-shaped workpiece with good heat conduction performance, such as an aluminum alloy material or a stainless steel material.
One side of the rear end cover body 1 is provided with a circuit board contact surface 101, the circuit board contact surface 101 is suitable for contacting with a control circuit board 4 of the electronic water pump and can exchange heat with the control circuit board 4, in fact, the control circuit board 4 can be fixed on the circuit board contact surface 101 of the rear end cover body 1 through screws or adhesive, and heat conducting media such as heat conducting silicone grease are coated between the control circuit board 4 and the circuit board contact surface 101 of the rear end cover body 1, so that heat exchange between the control circuit board 4 and the circuit board contact surface 101 of the rear end cover body is better performed.
The other side of the rear cover body 1 is provided as a pump housing mounting surface 102, and the pump housing mounting surface 102 is adapted to mount at least the pump housing 6 of the electronic water pump and close the open end of the pump housing 6 to form the rotor chamber 61 in the pump housing 6.
The pump housing mounting surface 102 is capable of exchanging heat with the liquid medium flowing in the rotor chamber 61 so as to be capable of conducting heat generated by the control circuit board 4 to the liquid medium flowing in the rotor chamber 61.
Specifically, the rear end cover body 1 is provided with a plurality of screw holes 104; after passing through the screw holes 104, the screws are locked into the pump casing 6, thereby mounting the pump casing 6 on the pump casing mounting surface 102 of the rear cover body 1.
Many liquid media (such as cooling liquid) have electrochemical corrosion, if the rear end cover body 1 is directly contacted with the liquid media without corrosion resistance treatment, the rear end cover body will be subjected to electrochemical corrosion of the liquid media, the surface is easy to darken if the rear end cover body is light, the glossiness is poor, and the surface of the rear end cover body 1 generates much white aluminum rust if the rear end cover body is severe, so that the appearance of a product is seriously affected, and the mechanical property of the product is weakened; further, impurities are easily generated in the rotor chamber 61 of the pump housing 6, and the following adverse effects are caused: 1. the rotor component of the electronic water pump is easy to be blocked, so that the electronic water pump cannot work normally; 2. the connection between the bearing 3 and the rear end cover body 1 is easy to loosen, and the noise of the product is increased; 3. impurities easily flow out of the electronic water pump, and the normal operation of other parts is affected.
In order to solve the above-mentioned problems, the rear end cap assembly of the present embodiment further includes an isolation seat 2 having heat conducting property and corrosion resisting property, specifically, the isolation seat 2 is an aluminum alloy supporting seat subjected to corrosion resisting treatment; the isolation seat 2 comprises a plate-shaped base 201, and in this embodiment, the base 201 is a flat circular plate; the pump shell mounting surface 102 of the rear end cover body 1 is provided with an isolation seat embedding groove 103 matched with the base 201 of the isolation seat 2, and in fact, the isolation seat embedding groove 103 is a circular groove, and the base 201 of the isolation seat 2 is embedded into the isolation seat embedding groove 103 of the rear end cover body 1; the isolation seat 2 is used for closing the open end of the pump shell 6 and is in contact with the liquid medium flowing in the rotor chamber 61, namely, after the pump shell 6 is fixed, the open end of the pump shell is blocked by the isolation seat 2, so that the rear end cover body 1 is prevented from being directly contacted with the liquid medium in the rotor chamber 61, the rear end cover body 1 is prevented from being corroded, and the heat of the control circuit board 4 can be conducted to the liquid medium flowing in the rotor chamber 61 through the rear end cover body 1 and the isolation seat 2 in sequence.
Further, a heat conducting medium is disposed between the base 201 of the isolation seat 2 and the isolation seat caulking groove 103 of the rear end cover body 1, in this embodiment, the heat conducting medium is heat conducting silicone grease, and a gap between the base 201 of the isolation seat 2 and the isolation seat caulking groove 103 of the rear end cover body 1 is filled with the heat conducting medium, so that good heat conducting performance between the rear end cover body 1 and the isolation seat 2 is ensured.
Further, the base 201 of the isolation seat 2 is pressed into the isolation seat caulking groove 103 of the rear end cover body 1 by a pressurizing process, and is interference fit with each other; in practice, the positioning of the insulator seat 2 in the axial direction, tangential direction and radial direction can be achieved by pressing the base 201 of the insulator seat 2 into the insulator seat insert groove 103 of the rear end cap body 1 by a pressing device.
Further specifically, a ring of pump housing sealing wall 203 is formed on the base 201 of the isolation seat 2, and the pump housing sealing wall 203 is integrally die-cast or integrally machined with the base 201 of the isolation seat 2; after the pump casing 6 is mounted on the pump casing mounting surface 102 of the rear end cover body 1, the pump casing sealing wall 203 abuts against the inner wall of the pump casing 6, thereby closing the open end of the pump casing 6, and sealing the pump casing 6 is achieved.
Further, the base 201 of the isolation seat 2 also forms a bearing embedded seat 202 at the inner periphery of the sealing wall 203 of the ring pump shell, and the bearing embedded seat 202 is an annular wall and is integrally molded with the base 201 of the isolation seat 2 in a die-casting manner or integrally machined manner; the bearing 3 of the electronic water pump can be embedded in the bearing embedding seat 202, thereby supporting the bearing 3 of the electronic water pump.
The anti-corrosion treatment is only needed for the isolation seat 2, and the whole rear end cover assembly is not needed to be treated, so that the manufacturing cost of the rear end cover assembly is effectively reduced; in addition, as can be seen from the above structure, the isolation seat 2 is a standard revolving body structure, and can be directly machined by using a machining mode, so that die opening and die casting are not needed, the die cost is saved, and the production period of the isolation seat 2 is shortened.
In the rear end cap assembly of the present embodiment, during manufacturing, the rear end cap body 1 and the isolation seat 2 are manufactured in advance, then, the heat-conducting medium is coated in the isolation seat caulking groove 103 of the rear end cap body 1, and then, the base 201 of the isolation seat 2 is pressed into the isolation seat caulking groove 103 of the rear end cap body 1 by the pressurizing device, so that the positioning of the isolation seat 2 in the axial direction, the tangential direction and the radial direction is achieved, that is, the manufacturing of the rear end cap assembly is completed.
Referring to fig. 4, the present embodiment further provides an electronic water pump, which includes the rear end cap assembly described above.
The electronic water pump of this embodiment at least includes a control circuit board 4 and a rear housing 5, the control circuit board 4 is based on a Printed Circuit Board (PCB), a main control, a power electronic device for driving a stator assembly to operate, and other peripheral circuits are mounted on the control circuit board 4, the stator assembly for driving the electronic water pump operates, the rear housing 5 and the rear housing body 1 are mutually covered and fixed (the two are mutually fixed through screws or buckles) so as to shield a circuit board contact surface 101 of the rear housing body 1, and at this time, the control circuit board 4 is accommodated between the rear housing 5 and the rear housing body 1.
The electronic water pump of the embodiment further comprises a pump shell 6, a stator assembly, a rotor assembly and a shaft core 7; the stator assembly is arranged in an interlayer of the pump shell 6, the shaft core 7 is supported in the rotor chamber 61 of the pump shell 6 through the bearing 3, the rotor assembly is sleeved on the shaft core 7 and can rotate by taking the shaft core 7 as a shaft, and the stator assembly is electrically connected with the control circuit board 4 and used for magnetically coupling and driving the rotor assembly to rotate in the rotor chamber 61 of the pump shell 6, so that the basic function of the water pump is realized.
When the electronic water pump of the embodiment is used, the control circuit board 4 drives the stator assembly to generate a rotating magnetic field, so that the magnetic coupling drives the rotor assembly to rotate in the rotor chamber 61 of the pump shell 6, heat emitted by the control circuit board 4 is conducted to a liquid medium flowing through the rotor chamber 61 sequentially through the rear end cover body 1 and the isolation seat 2, and accordingly heat emitted by the control circuit board 4 is rapidly taken away through circulation of the liquid medium, efficient heat dissipation of the control circuit board 4 is achieved, and in addition, the risk that the rear end cover body 1 is corroded by the liquid medium in an electrochemical mode due to direct contact between the isolation seat 2 with corrosion resistance and the liquid medium is effectively avoided, and further the risk that the rotor assembly is blocked and the bearing 3 is loosened is avoided.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The rear end cover assembly is applied to the electronic water pump and is characterized by comprising a rear end cover body;
one side of the rear end cover body is provided with a circuit board contact surface which is suitable for being contacted with a control circuit board of the electronic water pump and can exchange heat with the control circuit board;
the other side of the rear end cover body is provided with a pump shell mounting surface which is at least suitable for mounting a pump shell of the electronic water pump and closing the open end of the pump shell so as to form a rotor chamber in the pump shell;
the pump housing mounting surface is capable of heat exchange with a liquid medium flowing in the rotor chamber.
2. The rear end cap assembly of claim 1, wherein: the rear end cover body is provided with a plurality of screw holes;
after passing through the screw holes, the screws are locked into the pump shell, so that the pump shell is mounted on the pump shell mounting surface of the rear end cover body.
3. The rear end cap assembly of claim 1 or 2, wherein: the insulating seat has heat conducting performance and corrosion resisting performance;
the isolation seat comprises a plate-shaped base;
an isolation seat embedding groove matched with the base of the isolation seat is formed on the pump shell mounting surface of the rear end cover body, and the base of the isolation seat is embedded into the isolation seat embedding groove of the rear end cover body;
the isolation seat is used for closing the opening end of the pump shell and is contacted with the liquid medium flowing in the rotor chamber, and the heat of the control circuit board can be conducted to the liquid medium flowing in the rotor chamber through the rear end cover body and the isolation seat in sequence.
4. A rear end cap assembly as claimed in claim 3, wherein: and a heat conducting medium is arranged between the base of the isolation seat and the isolation seat caulking groove of the rear end cover body.
5. A rear end cap assembly as claimed in claim 3, wherein: the base of the isolation seat is pressed into the isolation seat caulking groove of the rear end cover body by a pressurizing process and is in interference fit with each other.
6. A rear end cap assembly as claimed in claim 3, wherein: a circle of pump shell sealing wall is formed on the base of the isolation seat;
the pump shell is arranged behind the pump shell mounting surface of the rear end cover body, and the pump shell sealing wall abuts against the inner wall of the pump shell.
7. The rear end cap assembly of claim 6, wherein: the base of the isolation seat also forms a bearing embedded seat on the inner periphery of the sealing wall of the ring pump shell;
the bearing of the electronic water pump can be embedded in the bearing embedding seat.
8. An electronic water pump comprising the rear end cap assembly of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322234089.5U CN220748620U (en) | 2023-08-19 | 2023-08-19 | Rear end cover assembly and electronic water pump using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322234089.5U CN220748620U (en) | 2023-08-19 | 2023-08-19 | Rear end cover assembly and electronic water pump using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220748620U true CN220748620U (en) | 2024-04-09 |
Family
ID=90557521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322234089.5U Active CN220748620U (en) | 2023-08-19 | 2023-08-19 | Rear end cover assembly and electronic water pump using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220748620U (en) |
-
2023
- 2023-08-19 CN CN202322234089.5U patent/CN220748620U/en active Active
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