CN107740773B

CN107740773B - Electronic water pump

Info

Publication number: CN107740773B
Application number: CN201710916088.5A
Authority: CN
Inventors: 葛笑; 桑渝; 陈金涛; 诸自强
Original assignee: Guangdong Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2019-12-20
Anticipated expiration: 2037-09-29
Also published as: CN107740773A

Abstract

The invention discloses an electronic water pump, comprising: pump case, motor casing, end cover, stator assembly, rotor impeller assembly and control panel subassembly, wherein, the end cover with the pump case is formed with pump body chamber, the end cover with the motor casing is formed with the motor chamber, seted up the intercommunication on the end cover the motor chamber with the inhalant canal in pump body chamber, the inside intercommunication that is equipped with of pivot of rotor impeller assembly the motor chamber with the exhalant canal in pump body chamber. Because the electronic water pump is provided with the water inlet channel and the water outlet channel which are communicated with the motor cavity and the pump body cavity, water in the pump body cavity can flow into and out of the motor cavity; and control panel assembly sets up on the outer wall of motor casing, so, the heat that control panel assembly produced can transmit to the motor chamber to taken away by the liquid of motor intracavity, the electronic pump that consequently this patent provided can realize the good heat dissipation of control panel assembly, thereby guarantees that electronic pump normally works.

Description

Electronic water pump

Technical Field

The invention relates to the field of water pumps, in particular to an electronic water pump.

Background

The motor that electronic water pump used is including brush motor and brushless motor, and wherein, brushless motor need set up the switching-over that the control panel subassembly realized the electric current to guarantee that the motor lasts the rotation. Because a large amount of heat is generated in the process of controlling the current commutation by the control board assembly, the temperature of the control board assembly is continuously increased, and the normal operation of the electronic water pump is influenced.

Disclosure of Invention

The invention mainly aims to provide an electronic water pump, which aims to realize good heat dissipation of a control board assembly so as to ensure the normal work of the electronic water pump.

In order to achieve the above object, the present invention provides an electronic water pump, comprising: the pump comprises a pump shell, a motor shell and an end cover, wherein a pump body cavity is formed by the end cover and the pump shell, a motor cavity is formed by the end cover and the motor shell, and a water inlet channel communicated with the motor cavity and the pump body cavity is formed in the end cover; the stator assembly is arranged in the motor cavity; the rotor impeller assembly comprises a rotating shaft, an impeller and a rotor, wherein the rotating shaft is rotatably connected with the radial middle part of the end cover, the impeller and the rotor are sleeved on the rotating shaft, a water outlet channel communicated with the motor cavity and the pump body cavity is arranged in the rotating shaft, the impeller is positioned in the pump body cavity, the rotor is arranged in the motor cavity, and the rotor and the stator assembly are oppositely arranged; and the control panel component is fixedly arranged on the motor shell and is far away from the outer wall of the end cover, and the control panel component is attached to the outer wall.

Preferably, the rotor includes: the rotor support comprises an end wall arranged between the stator assembly and the end cover and a peripheral side wall extending from the end wall to one side far away from the end cover, a water outlet hole communicated with the rotating shaft is formed in the radial middle of the end wall, and at least one water inlet hole is formed in the end wall on the outer side of the water outlet hole; and the permanent magnet is fixedly arranged on the inner wall surface of the peripheral side wall.

Preferably, the rotor bracket and the rotating shaft are integrally formed.

Preferably, one side of the end cover close to the motor cavity is provided with a bearing chamber, and a bearing for the adaptive connection of the rotating shaft is arranged in the bearing chamber.

Preferably, the electronic water pump further comprises a liquid guide pipe, the outer wall surface of the liquid guide pipe is attached to the inner wall of the motor shell, one end of the liquid guide pipe is communicated with the water inlet channel, and the other end of the liquid guide pipe is communicated with the water outlet channel.

Preferably, the liquid guide pipe is attached to the inner wall surface of the motor casing opposite to the control panel assembly.

Preferably, a heat conduction layer is arranged between the control board assembly and the motor shell.

Preferably, the electronic water pump further comprises a housing cover which covers and is fixed on the outer wall of the motor housing, and the housing cover is used for sealing the control board assembly.

Preferably, an annular positioning portion is arranged on the outer wall, far away from the end cover, of the motor shell, the machine shell cover is sleeved and fixed with the annular positioning portion, and a third sealing ring is arranged between the machine shell cover and the annular positioning portion.

Preferably, an annular mounting part is arranged on the inner wall surface of the motor shell opposite to the end cover, and the stator assembly is embedded in the annular mounting part.

Preferably, the periphery of the end cover is provided with a mounting flange, the pump shell is provided with a first fixing lug matched with the mounting flange, the motor shell is provided with a second fixing lug matched with the mounting flange, and the mounting flange, the first fixing lug and the second fixing lug are fixedly connected through a second connecting piece.

Preferably, a first sealing ring is arranged at the matching position of the pump shell and the end cover; and a second sealing ring is arranged at the matching position of the motor shell and the end cover.

Preferably, a positioning flange is arranged on one side, close to the motor cavity, of the end cover, and the motor shell is fixedly sleeved with the positioning flange; the second sealing ring is fixedly arranged between the positioning flange and the inner wall surface of the motor shell.

According to the electronic water pump, the end cover is provided with the water inlet channel communicated with the motor cavity and the pump cavity, and the rotating shaft is internally provided with the water outlet channel communicated with the motor cavity and the pump cavity, so that water in the pump cavity can flow into and out of the motor cavity, and the good heat dissipation of the motor part of the electronic water pump is realized; and, the control panel subassembly setting of electronic water pump is on the outer wall of motor casing, so, the heat that the control panel subassembly produced can transmit to the motor chamber, and then makes the heat take away by the liquid of motor intracavity, therefore the electronic water pump that this patent provided can realize the good heat dissipation of control panel subassembly to guarantee electronic water pump's normal work.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic perspective view of an electronic water pump according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic perspective view of the rotor of FIG. 2;

the reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	First seal ring	130	First fixing lug
20	Second seal ring	210	Annular positioning part
				30	Third seal ring	220	Annular mounting part
100	Pump casing	230	Second fixing lug
				200	Motor casing	240	Casing cover
300	End cap	310	Water inlet channel
				400	Rotating shaft	320	Mounting flange
500	Impeller	410	Water outlet channel
				600	Rotor	610	Rotor support
700	Control board assembly	620	Permanent magnet
				800	Heat conducting layer	630	Water inlet
900	Stator assembly	910	Stator core
				110	Water inlet	920	Stator winding
120	Water outlet	930	Stator plastic package body

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an electronic water pump, which is internally provided with a cooling water loop for cooling a control panel assembly, so that good heat dissipation of the control panel assembly can be realized, and the normal work of the electronic water pump is ensured.

The electronic water pump comprises a pump body part for pumping water and a motor part for driving an impeller of the pump body part to rotate, wherein the motor part is provided with a control panel assembly 700, a large amount of heat can be generated in the work engineering of the control panel assembly 700, in order to realize good heat dissipation of the control panel assembly 700, liquid circulated by the pump body part is introduced into the motor part, the control panel assembly 700 is arranged on a motor shell, and therefore good heat dissipation of the control panel assembly 700 can be realized.

Referring to fig. 1 to 3, an electronic water pump provided in the present invention includes: the electronic water pump comprises a pump shell 100, a motor shell 200, an end cover 300, a stator assembly 900, a rotor impeller assembly and a control plate assembly 700, wherein the pump shell 100 and an impeller 500 of the rotor impeller assembly form a pump body part of the electronic water pump, the motor shell 200, the control plate assembly 700, the stator assembly 900 and a rotor 600 of the rotor impeller assembly form a motor part of the electronic water pump, and the end cover 300 is used for fixedly connecting the pump body part and the motor part of the electronic water pump.

Specifically, a pump body cavity is formed between the end cover 300 and the pump casing 100, a motor cavity is formed between the end cover 300 and the motor casing 200, and a water inlet passage 310 communicating the motor cavity and the pump body cavity is formed in the end cover 300; the stator assembly 900 is arranged in the motor cavity; the rotor assembly comprises a rotating shaft 400 rotatably connected with the center of the end cover 300, an impeller 500 sleeved on the rotating shaft 400 and a rotor 600, a water outlet channel 510 communicated with the motor cavity and the pump body cavity is arranged in the rotating shaft 400, the impeller 500 is positioned in the pump body cavity, the rotor 600 is arranged in the motor cavity, and the rotor 600 and the stator assembly 900 are oppositely arranged; the control panel assembly 700 is fixedly arranged on the outer wall of the motor shell 200 far away from the end cover 300, and the control panel assembly 700 is attached to the outer wall of the end cover 300.

The principle of this patent that enables good heat dissipation of the control board assembly 700 will now be described with reference to fig. 1 and 2. The rotor 600 in the motor cavity can drive the rotating shaft 400 to rotate under the action of the magnetic field of the stator assembly, so as to drive the impeller 500 in the pump cavity to rotate, the pump shell 100 is provided with the water inlet 110 and the water outlet 120, when the impeller 500 rotates, negative pressure is formed in the pump cavity, so that liquid such as water, oil and the like can flow into the pump cavity from the water inlet 110, and flow out of the pump cavity from the water outlet 120. Because the end cover 300 is provided with the water inlet channel 310 for communicating the motor cavity with the pump cavity, and the rotating shaft 400 is internally provided with the water outlet channel 510 for communicating the motor cavity with the pump cavity, water in the pump cavity can flow into and out of the motor cavity; and control panel assembly 700 sets up on the outer wall of motor casing 200, so, the heat that control panel assembly 700 produced can transmit to motor casing 200 to be taken away by the liquid of motor intracavity, thereby realize control panel assembly 700's good heat dissipation.

As shown in fig. 2, in order to further improve the heat dissipation effect of the control board assembly 700, in an embodiment of the present invention, a heat conductive layer 800 is disposed between the control board assembly 700 and the end cap 300, and specifically, the heat conductive layer 800 is made of a material such as heat conductive silicone grease, heat conductive silicone rubber, or the like. Preferably, the control board assembly 700 is fixed to the end cap 300 by bolts, so that the heat conductive layer 800 is clamped between the control board assembly 700 and the end cap 300. However, the design of the present invention is not limited thereto, and in other embodiments, the heat conductive layer 800 may be adhesively fixed to the control board assembly 700 and/or the end cap 300.

In order to prolong the service life of the control board assembly 700 and prevent dust from depositing on the control board assembly 700 or liquid from corroding, the electronic water pump further comprises a housing cover 240, wherein the housing cover 240 covers the outer wall of the motor housing 200 to seal the control board assembly 700, so that the housing cover 240 can protect the control board assembly 700 and prevent the control board assembly 700 from depositing dust or flowing liquid, and thus the service life of the control board assembly 700 can be prolonged.

Specifically, the motor casing 200 includes an end casing disposed opposite to the end cover 300 and a side casing extending from a peripheral edge of the end casing to one side of the end cover 300, an annular positioning portion 210 is disposed on an outer wall of the end casing away from the end cover 300, and an inner wall surface of the casing cover 240 is fixed to an outer wall surface of the annular positioning portion 210 in a sleeved manner.

Preferably, a third seal ring 30 is provided between an inner wall surface of the housing cover 240 and an outer wall surface of the annular positioning portion 210, so that the sealing property between the housing cover 240 and the annular positioning portion 210 can be improved, and dust or liquid can be prevented from contacting the control panel assembly 700.

Considering that liquid flows into the motor intracavity back, can increase the resistance of rotor rotation process, in order to avoid producing the resistance to the rotor, in this patent embodiment, electronic pump still includes the catheter (not shown), the outer wall of catheter with the inner wall of motor casing is the laminating setting, the one end intercommunication of catheter inlet channel, the other end intercommunication of catheter outlet channel. Therefore, the motor cavity can be prevented from being filled with liquid, and the rotor rotation resistance is prevented from being overlarge; good heat dissipation of the control panel assembly can also be achieved through the liquid guide tube. As a preferred mode, the catheter is attached to the inner wall face, opposite to the control panel assembly, of the motor shell, and therefore the heat dissipation effect of the control circuit board is better.

In addition, the electronic water pump that this patent provided can also realize stator assembly 900's good heat dissipation. Specifically, the stator assembly 900 includes a stator core 910, a stator winding 920 wound around the stator core 910, and a stator plastic package 930 encapsulated outside the stator winding 920, and the stator plastic package 930 is used for achieving good insulation of the stator assembly 900, and since the stator assembly 900 is disposed in a motor cavity, the stator assembly 900 can be in full contact with liquid, so that heat generated by the electronic assembly is taken away through flowing liquid, and good heat dissipation of the stator assembly 900 is achieved.

The structure for mounting the stator assembly 900 to the motor casing 200 will now be described in detail with reference to fig. 2. An annular mounting part 220 is arranged on the inner wall surface of the end shell close to the end cover 300, and the stator assembly 900 is embedded in the annular mounting part 220.

In a preferred embodiment, the rotor 600 of the electronic water pump proposed in this patent is an outer rotor, and specifically, the rotor 600 is disposed between an inner peripheral wall of the motor housing 200 and an outer peripheral wall of the stator assembly 900. Specifically, the rotor 600 includes a rotor support 610 and a permanent magnet 620, where the rotor support 610 includes an end wall disposed between the stator assembly 900 and the end cover 300 and a peripheral side wall extending from the end wall to a side away from the end cover, a water outlet hole communicated with the rotating shaft is formed in a radial middle portion of the end wall, and at least one water inlet hole 630 is formed in an end wall on an outer side of the water outlet hole; the permanent magnet 620 is fixedly arranged on the inner wall surface of the peripheral side wall. Preferably, the rotating shaft 400 and the rotor holder 610 are integrally formed, so that the step of fixing the rotor holder 610 and the rotating shaft 400 can be omitted, and the installation of the rotor holder 610 and the rotating shaft 400 is more convenient.

In addition, the water inlet holes 630 can also reduce the weight of the rotor 600, and as a preferable mode, the four water inlet holes 630 are opened on the end wall, and the four water inlet holes 630 are uniformly distributed on the end wall.

The mounting structure of the pump housing 100, the motor housing 200, and the end cap 300 will now be described in detail with reference to fig. 2. The end cap 300 is provided with a mounting flange 320 at a periphery thereof, the pump housing 100 is provided with a first fixing lug 130 adapted to the mounting flange 320, the motor housing 200 is provided with a second fixing lug 230 adapted to the mounting flange 320, and the mounting flange 320, the first fixing lug 130 and the second fixing lug 230 are fixedly connected by a second connector. Specifically, the mounting flange 320, the first fixing lug 130 and the second fixing lug 230 are correspondingly provided with mounting through holes, and connecting members such as screws and bolts penetrate through the mounting through holes to realize the fixed connection of the pump casing 100, the motor casing 200 and the end cover 300.

In order to improve the sealing performance after the pump shell 100 and the end cover 300 are fixedly installed, a first sealing ring 10 is arranged at the matching position of the pump shell 100 and the end cover 300; in order to improve the sealing performance after the motor casing 200 and the end cap 300 are fixedly mounted, a second sealing ring 20 is arranged at the matching position of the motor casing 200 and the end cap 300.

In order to facilitate the fixed connection between the motor casing 200 and the end cover 300, a positioning flange is arranged on one side of the end cover 300 close to the motor cavity, and since the end cover 300 is provided with the annular positioning flange, the outer peripheral wall of the positioning flange is matched with the inner peripheral wall of the motor casing 200 in size, when the motor casing 200 is fixedly connected with the end cover 300, the motor casing 200 is sleeved on the positioning flange, and the second seal ring 20 is fixedly arranged between the positioning flange and the inner wall surface of the motor casing 200, so that the contact area between the motor casing 200 and the end cover 300 can be increased, the sealing performance between the motor casing 200 and the end cover 300 is improved, and the fixed connection between the motor casing 200 and the end cover 300 can be facilitated.

Now combine fig. 2 to explain in detail the mounting structure of this patent pivot 400, end cover 300 is close to one side in motor chamber is formed with the bearing room, the indoor confession of installing of bearing the pivot 400 rotates the antifriction bearing of connecting, the axial middle part suit of pivot 400 is fixed in the antifriction bearing, pivot 400 stretches into the one end suit in pump body chamber is fixed with impeller 500, pivot 400 stretches into the one end in motor chamber with rotor 600 is fixed even.

As a preferable mode, the rotating shaft 400 and the rotor 600 are integrally formed, so that the installation steps between the rotating shaft 400 and the rotor 600 can be simplified, the connection strength between the rotating shaft 400 and the rotor 600 can be ensured, and the service life of the rotor 600 can be prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An electronic water pump, comprising:

the pump comprises a pump shell, a motor shell and an end cover, wherein a pump body cavity is formed by the end cover and the pump shell, a motor cavity is formed by the end cover and the motor shell, and a water inlet channel communicated with the motor cavity and the pump body cavity is formed in the end cover;

the stator assembly is arranged in the motor cavity; the rotor impeller assembly comprises a rotating shaft, an impeller and a rotor, wherein the rotating shaft is rotatably connected with the radial middle part of the end cover, the impeller and the rotor are sleeved on the rotating shaft, a water outlet channel communicated with the motor cavity and the pump body cavity is arranged in the rotating shaft, the impeller is positioned in the pump body cavity, the rotor is arranged in the motor cavity, and the rotor and the stator assembly are oppositely arranged; the rotor includes: the rotor support comprises an end wall arranged between the stator assembly and the end cover and a peripheral side wall extending from the end wall to one side far away from the end cover, a water outlet hole communicated with the water outlet channel is formed in the radial middle of the end wall, and at least one water inlet hole is formed in the end wall on the outer side of the water outlet hole; and a permanent magnet fixedly arranged on the inner wall surface of the peripheral side wall; and the number of the first and second groups,

the control panel subassembly, the control panel subassembly set firmly in the motor casing is kept away from the outer wall of end cover, just the control panel subassembly with the outer wall is the laminating setting.

2. The electronic water pump of claim 1, wherein the rotor bracket is integrally formed with the shaft.

3. The electronic water pump according to claim 1, wherein a bearing chamber is provided at a side of the end cap close to the motor chamber, and a bearing for the adaptive connection of the rotating shaft is provided in the bearing chamber.

4. The electronic water pump according to any one of claims 1 to 3, further comprising a liquid guide tube, wherein an outer wall surface of the liquid guide tube is attached to an inner wall of the motor casing, one end of the liquid guide tube is communicated with the water inlet channel, and the other end of the liquid guide tube is communicated with the water outlet channel.

5. The electronic water pump of claim 4, wherein the fluid conduit is attached to an inner wall surface of the motor housing opposite the control plate assembly.

6. The electronic water pump according to any of claims 1-3, wherein a thermally conductive layer is disposed between the control board assembly and the motor housing.

7. The electronic water pump of claim 6, further comprising a housing cover secured to an outer wall of the motor housing, the housing cover configured to cover the control board assembly.

8. The electronic water pump according to claim 7, wherein an annular positioning portion is disposed on an outer wall of the motor housing away from the end cover, the housing cover is fixed to the annular positioning portion in a sleeved manner, and a third seal ring is disposed between the housing cover and the annular positioning portion.

9. The electronic water pump according to any one of claims 1 to 3, wherein an annular mounting portion is provided on an inner wall surface of the motor casing opposite to the end cap, and the stator assembly is embedded in the annular mounting portion.

10. The electronic water pump according to any one of claims 1 to 3, wherein a mounting flange is provided on a periphery of the end cover, the pump housing is provided with a first fixing lug which is fitted to the mounting flange, the motor housing is provided with a second fixing lug which is fitted to the mounting flange, and the mounting flange, the first fixing lug and the second fixing lug are fixedly connected by a second connector.

11. The electronic water pump according to claim 1, wherein a first seal ring is arranged at a joint of the pump shell and the end cover; and a second sealing ring is arranged at the matching position of the motor shell and the end cover.

12. The electronic water pump according to claim 11, wherein a positioning flange is provided on a side of the end cap adjacent to the motor cavity, and the motor housing is fixed to the positioning flange in a sleeved manner; the second sealing ring is fixedly arranged between the positioning flange and the inner wall surface of the motor shell.