CN221628427U

CN221628427U - Electronic water pump

Info

Publication number: CN221628427U
Application number: CN202323522144.7U
Authority: CN
Inventors: 陈金鹏; 陈少林; 杨涵钦; 刘世伟; 刘义; 杨根根; 吴荣发; 谢模炎; 苏校
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2023-12-23
Filing date: 2023-12-23
Publication date: 2024-08-30
Anticipated expiration: 2033-12-23

Abstract

The utility model discloses an electronic water pump, which comprises a volute, a motor casing with an end plate, an end seat, a waterproof sleeve, a stator assembly, a rotor assembly and an impeller, wherein the end seat is assembled with one end of the motor casing into a whole and forms an accommodating space inside; the pump water chamber is communicated with the liquid passing gap, the liquid passing groove and the liquid passing hole through the liquid inlet to form a cooling channel. According to the electronic water pump disclosed by the utility model, the waterproof sleeve is arranged in the motor shell to divide the stator assembly and the rotor assembly into two areas which are not communicated with each other, and the pumping medium of the electronic water pump is directly utilized to cool the working temperature in the motor, so that a power device and a cooling medium do not need to be additionally arranged. The cooling liquid flows in the electronic water pump to take away heat generated by the motor and other electronic devices during operation, so that the purpose of cooling is achieved, and the condition that the motor and other controllers burn out or are in thermal protection halt due to overhigh temperature is avoided.

Description

Electronic water pump

Technical Field

The utility model relates to the technical field of water pumps, in particular to an electronic water pump.

Background

With the development of technology and high requirements on fuel efficiency, in both internal combustion engines and hybrid and new energy electric vehicles, electronic water pumps are becoming more and more important in automobile thermal management systems, especially in the field of new energy automobiles, motors are more sensitive to temperature, and the working temperature of the motors can only be controlled by the electronic water pumps. At present, in order to improve the cooling efficiency of an automobile engine, an electronic water pump is widely applied to an automobile heat dissipation and circulation system, and circulation flow power of a heat dissipation medium is provided in the heat dissipation and circulation system; after the automobile is started, the electronic control components can generate a large amount of heat, and the heat must be timely discharged through the heat dissipation circulating system, so that the electronic control components can work in a normal temperature range to ensure the reliability of the system, and the electronic water pump is a power source for circulating heat conducting medium of the heat dissipation system.

In the related art, the impeller has certain sealing performance between the impeller blades and the wall of the inner cavity of the shell in the rotating process of the inner cavity of the shell, positive pressure is formed on the water outlet pipeline under the action of centrifugal force, vacuum is formed on the water inlet pipeline, and the pressure difference is utilized to actively press water into the inner cavity of the shell so as to realize the purpose of pumping. The impeller drives the impeller to rotate through the motor rotor, and under the working condition of high-speed rotation, the heat between the motor rotor and the stator is serious, so that the temperature inside the motor is too high, and the motor is easy to burn out. In addition, the circuit control components of the electronic pump are arranged close to the motor, heat generated in the operation process can improve the temperature of the whole circuit board mounting cavity, and meanwhile, the working temperature is higher under the influence of the motor, so that the circuit control components of the electronic pump are easy to burn out.

In view of this, it is necessary to propose an electronic water pump to solve the above-mentioned drawbacks.

Disclosure of utility model

The utility model mainly aims to provide an electronic water pump, which aims to solve the problem that the motor and circuit control components are easy to burn out due to the fact that the internal temperature of the existing motor is too high.

In order to achieve the above purpose, the utility model provides an electronic water pump, which comprises a volute, a motor casing with an end plate, an end seat which is assembled with one end of the motor casing into a whole and internally forms a containing space, a waterproof sleeve which is assembled in the containing space, a stator assembly, a rotor assembly and an impeller which is arranged on the rotor assembly;

The spiral case is connected with the other end of the motor casing to form a pumping chamber of a closed space, the rotor assembly is provided with a rotating shaft, the rotating shaft is provided with liquid through holes penetrating through two end faces of the rotating shaft, one end of the waterproof sleeve is sleeved on the end plate, the other end of the waterproof sleeve is sleeved on the end seat, the end plate, the waterproof sleeve and the end seat are connected, and the stator assembly and the rotor assembly are separated in two areas which are not communicated with each other;

The end seat extends from the bottom plate to the direction of the end plate to form a support with a mounting hole in the middle, the rotating shaft is fixedly arranged in the mounting hole, a liquid passing groove is formed in the support, and the liquid passing groove is communicated with the mounting hole;

One end of the rotating shaft is fixed on the end seat, the other end of the rotating shaft penetrates through the end plate, and the impeller is axially arranged on the rotating shaft and is positioned in the pumping chamber;

The end plate is provided with a liquid inlet communicated with the water pumping chamber, and a liquid passing gap communicated with the liquid inlet is formed between the outer wall of the rotor assembly and the inner wall of the waterproof sleeve;

The pump water chamber is communicated with the liquid passing gap, the liquid passing groove and the liquid passing hole through the liquid inlet to form a cooling channel.

Preferably, the end plate extends towards the direction of the end seat to form an installation seat, and two ends of the waterproof sleeve are respectively sleeved on the installation seat and the support.

Preferably, sealing rings are arranged between the waterproof sleeve and the support and between the waterproof sleeve and the mounting seat.

Preferably, the waterproof sleeve comprises a sleeve body and a first connecting end and a second connecting end which are bent and extended from two ends of the sleeve body;

the first connecting end is sleeved on the mounting seat, and the section of the first connecting end is of a stepped structure;

The second connecting end is sleeved on the support, and the second connecting end is provided with a curled edge facing the outer Zhou Fanqi of the sleeve body.

Preferably, the liquid passing groove comprises a first groove body extending from the top of the support to the opposite bottom of the support and a second groove body extending from the center of the support to the first groove body and communicated with the first groove body;

Wherein the first groove body and the second groove body are a plurality of, the first groove bodies and the second groove bodies are circumferentially distributed on the support.

Preferably, the rotor assembly comprises a rotor core and a sealing sleeve wrapped outside the rotor core, and a gap formed between the sealing sleeve and the waterproof sleeve is the liquid passing gap.

Preferably, the impeller comprises a hub, an impeller frame and a plurality of blades, wherein the blades are arranged at intervals along the circumferential direction of the impeller frame, the intervals among the blades arranged at intervals are different and unequal intervals, the hub is axially fixed on the rotating shaft, the top of the impeller frame is recessed downwards to form a ring groove, and the volute is embedded in the ring groove.

Preferably, the cooling channel further comprises a liquid outlet channel, a liquid outlet hole is formed in the bottom of the support, a liquid outlet groove communicated with the liquid outlet hole is formed in the bottom plate, a liquid outlet channel is formed in the side wall of the motor shell, the mounting hole is communicated with the liquid outlet channel through the liquid outlet groove, a liquid outlet gap is formed between the volute and the end plate, and the liquid outlet channel is communicated with the pumping chamber through the liquid outlet gap.

Preferably, the motor housing further comprises a seal arranged between the volute and the motor housing, and between the end seat and the motor housing.

Preferably, the seal is a sealing ring.

Compared with the prior art, the electronic water pump provided by the utility model has the following beneficial effects:

According to the electronic water pump provided by the utility model, the waterproof sleeve is arranged in the motor shell to divide the stator assembly and the rotor assembly into two areas which are not communicated with each other, the cooling channel is communicated with the water pumping chamber, the liquid passing gap, the liquid passing groove and the liquid passing hole, the cooling liquid entering the cooling channel is the cooling medium in the water pumping chamber, the pumping medium of the electronic water pump is directly utilized to cool the working temperature inside the motor, a power device and the cooling medium are not required to be additionally arranged, and the electronic water pump is energy-saving and environment-friendly. The cooling channel enables the inside of the water pump to form a self-cooling circulation system, cooling liquid flows in the electronic water pump to take away heat generated during the operation of the motor and other electronic devices, so that the purpose of cooling is achieved, the cooling channel flows through the inside of the motor, the working temperature of the motor is reduced, the condition that the motor and other controllers burn out or are in thermal protection halt due to overhigh temperature is avoided, and therefore the risk of damage or halt of the water pump is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of an electronic water pump provided by the utility model;

FIG. 2 is an exploded view of a portion of the electronic water pump shown in FIG. 1;

FIG. 3 is a cross-sectional view of the electronic water pump shown in FIG. 1;

fig. 4 is an enlarged view of the structure of the portion a shown in fig. 3;

FIG. 5 is a schematic view of the motor housing of FIG. 3;

FIG. 6 is a block diagram of the end mount shown in FIG. 3;

fig. 7 is a schematic structural view of the waterproof jacket shown in fig. 3;

Fig. 8 is a structural view of the impeller shown in fig. 3.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 4, the present utility model provides an electronic water pump. The electronic water pump comprises a volute 1, a motor casing 2 with an end plate 21, an end seat 3 which is assembled with one end of the motor casing 2 into a whole and internally forms a containing space, a waterproof sleeve 4 assembled in the containing space, a stator assembly 5, a rotor assembly 6 and an impeller 7 arranged on the rotor assembly 6. The volute 1 and the end seat 3 are respectively arranged at two ends of the motor casing 2, and are assembled into a whole.

The scroll casing 1 is connected to the other end of the motor casing 2 to form a pump chamber 811 in a closed space, and the impeller 7 is mounted in the pump chamber 811. The rotor assembly 6 has a hollow rotating shaft 61, and the rotating shaft 61 is provided with liquid through holes 63 penetrating through both end surfaces thereof. One end of the waterproof sleeve 4 is sleeved on the end plate 21, the other end of the waterproof sleeve is sleeved on the end seat 3, and the end plate 21, the waterproof sleeve 4 and the end seat 3 are connected and divide the stator assembly 5 and the rotor assembly 6 into two areas which are not communicated with each other. The two areas separated by the waterproof jacket 4 are a water inlet cooling area and a drying area, which are not communicated with each other, the water inlet cooling area has good sealing performance, the cooling liquid entering the area is prevented from entering the drying area, and the stator assembly 5 is positioned in the drying area, so that the drying area must be kept waterproof, and the short circuit of the power-on coil of the rotor assembly 6 is avoided.

Referring to fig. 6, the end seat 3 extends from a bottom plate thereof toward the end plate 21 to form a support 33 having a mounting hole 31 in the middle, the rotating shaft 61 is fixedly mounted in the mounting hole 31, the support 33 is provided with a liquid passing groove 35, and the liquid passing groove 35 is communicated with the mounting hole 31 to form a channel for liquid circulation.

One end of the rotating shaft 61 is fixed on the end seat 3, the other end passes through the end plate 21, the rotating shaft 61 passes through the motor casing 2, and the impeller 7 is axially mounted on the rotating shaft 61 and is positioned in the pump chamber 811. The rotor assembly 6 drives the impeller 7 to rotate, and pumps out the cooling medium which enters the pumping chamber 811.

As shown in fig. 3 and 5, the end plate 21 is provided with a liquid inlet 23 which is communicated with the pump chamber 811, a liquid passing gap 9 which is communicated with the liquid inlet 23 is formed between the outer wall of the rotor assembly 6 and the inner wall of the waterproof jacket 4, and the cooling medium entering the pump chamber 811 flows into the liquid passing gap 9 through the liquid inlet 23. The pump chamber 811 communicates with the liquid passing gap 9, the liquid passing groove 35 and the liquid passing hole 63 through the liquid inlet 23 to form a cooling passage. The cooling liquid entering from the liquid inlet 23 is discharged from the liquid through hole 63 to the pumping chamber after passing through the liquid through gap and the liquid through groove 35, so that the cooling channel passes through the inside of the water pump to form a self-cooling circulation system, and the cooling liquid flows in the inside of the electronic water pump to take away heat generated by the motor and other electronic devices during operation, thereby achieving the purpose of cooling.

In the related art, in the rotating process of the inner cavity of the shell, the impeller 7 has a certain sealing performance between the blades 75 of the impeller 7 and the wall of the inner cavity of the shell, positive pressure is formed on the water outlet pipeline under the action of centrifugal force, vacuum is formed on the water inlet pipeline, and the water is actively pressed into the inner cavity of the shell by utilizing the pressure difference, so that the time delay of forming cooling water circulation is often caused by the problem of the processing precision of the blades 75 of the impeller 7 and the matching surface of the shell, thereby influencing the internal cooling speed of the work of the water pump and further influencing the overall performance of the electronic water pump. The cooling channel of the electronic water pump enters from the water pumping cavity, the cooling liquid of the cooling channel is the cooling medium pumped by the electronic water pump, no cooling liquid is needed to be additionally communicated, the cooling liquid is conveyed into the cooling channel when the electronic water pump pumps the cooling medium, namely in the working process of the electronic water pump, the function of the cooling channel is realized by improving the structure of the pump, the cooling effect is improved, the compactness and the smaller size of the pump can be ensured, and the performance of the electronic water pump is particularly outstanding under the working condition that the volume requirement is smaller and the power requirement is higher.

As shown in fig. 6, specifically, the end plate 21 extends toward the end seat 3 to form a mounting seat 211, and two ends of the waterproof jacket 4 are respectively sleeved on the mounting seat 211 and the mounting seat 33. The installation seat 211, the waterproof sleeve 4 and the installation seat 33 are connected into a whole, wherein the installation seat 211, the waterproof sleeve 4 and the installation seat 33 are enclosed inner spaces which are water inlet cooling areas, and the outside of the water inlet cooling areas is a drying area.

Referring to fig. 2 and 3, further, an end of the end base 3 away from the motor casing 2 is further provided with a receiving cavity 38, the receiving cavity 38 is closed by assembling the cover 12 on the motor casing 2, and a circuit control board 40 is disposed in the receiving cavity 38 and is fixed on the bottom plate of the end base 3. It will be appreciated that the cooling fluid of the cooling channels circulates through the bottom of the end seat 3 and the cooling effect is transferred through the bottom plate, so that the circuit control board 40 mounted on the bottom plate is cooled, thereby reducing the operating temperature of the circuit control board 40. Therefore, the cooling channel can not only reduce the stability of the motor, but also reduce the temperature of the circuit control board. The electronic water pump does not need to increase the volume, improves the heat radiation performance of the electronic water pump, reduces the working temperature of the controller, ensures the service performance of the electronic water pump, prolongs the service life of the controller, has simple process, low cost and good sealing effect, is not easy to damage the water pump, and greatly prolongs the service life of the electronic water pump.

Referring to fig. 6, the liquid passing groove 35 includes a first groove 351 formed to be recessed from the top of the support 33 toward the opposite bottom thereof, and a second groove 353 communicating the mounting hole 31 and the first groove 351.

The first grooves 351 and the second grooves 353 are all plural, and the first grooves 351 and the second grooves 353 are all circumferentially distributed on the support 33.

It will be appreciated that in order to make the waterproofing between the two areas separated by the waterproof jacket 4 better, sealing rings are provided between the waterproof jacket 4 and the support 33, and between the waterproof jacket 4 and the mounting base 211. The sealing ring greatly improves the isolation performance between the two areas, so that the waterproof performance between the isolation areas is better.

As shown in fig. 7, the waterproof jacket 4 further includes a jacket body 41, and a first connection end 43 and a second connection end 45 bent and extended from both ends of the jacket body 41. The first connection end 43 is sleeved on the mounting seat 211, and the section of the first connection end 43 is in a stepped structure. The second connecting end 45 is sleeved on the support 33, and the second connecting end 45 is curled towards the outer Zhou Fanqi of the sleeve body 41. The first connection end 43 is sealed with the mounting seat 211 by a sealing ring.

It will be appreciated that the waterproof jacket 4 serves as a sealing member and is shaped to fit internally between the stator assembly and the rotor assembly, and the jacket body 41 is shaped as a straight cylinder because the location where the stator assembly and the rotor assembly fit is rectilinear.

The stator assembly 5 and the rotor assembly 6 form a motor, wherein the stator assembly 5 comprises a stator core, an enameled wire, a wire passing frame and a framework, and the enameled coil is wound on the stator core and the framework. The rotor assembly 6 is rotatably disposed within the motor housing 2. The rotor assembly 6 comprises a rotor core 64 and a sealing sleeve 65 wrapped outside the rotor core 64, and a gap formed between the sealing sleeve 65 and the waterproof sleeve 4 is the liquid passing gap 9. The seal sleeve 65 is wrapped outside the rotor core 64 and welded integrally with the rotor core 64. The sealing sleeve 65 wraps the rotor core 64 inside and forms a seal against water ingress inside the rotor core 64.

The gap is formed between the sealing sleeve 65 and the waterproof sleeve 4, and the cooling liquid flows through the gap to reduce the temperature between the rotor assembly 6 and the stator assembly 5, so that the working temperature of the motor is reduced, the phenomenon that the motor is burnt due to overhigh working temperature is reduced, the service life of the motor is prolonged, the stability of the water pump is improved, and the service life of the water pump is prolonged.

As shown in fig. 8, the impeller 7 includes a hub 71, an impeller frame 73, and a plurality of blades 75, each of the blades 75 being arranged to be spaced apart from each other in a circumferential direction of the impeller frame 73, the spacing between the blades 75 arranged to be spaced apart being unequal to each other, so that noise generated when the impeller 7 rotates can be reduced by a simple structure. The hub 71 is axially fixed on the rotating shaft 61, the top of the impeller frame 73 is recessed downwards to form a ring groove, and the volute 1 is embedded in the ring groove. The vane 75 is designed by adopting the impeller 7 with a guiding function, negative pressure is easily formed in the inner cavity of the volute 1 after the impeller 7 is started, self-priming performance is rapidly reflected, and hysteresis phenomenon does not occur. On the other hand, the cooling liquid is guided by the impeller 7 before entering the shell, enters the inner cavity of the volute 1 along the direction of the blades 75, so that instantaneous noise generated by the direct impact of high-speed cooling water on the impeller 7 is avoided, the structural design of the impeller 7 with the guiding function enables the cooling liquid to generate a faster transmission effect under the action of the impeller 7, the cooling liquid flow rate is faster, the flow rate entering the cooling channel is faster, the cooling speed inside the motor is faster, and the overall performance of the water pump is effectively improved.

As shown in fig. 3, as a preferred embodiment of the present utility model, the cooling channel further includes a liquid outlet channel, a liquid outlet hole 331 is formed at the bottom of the support 33, a liquid outlet slot 333 that communicates with the liquid outlet hole 331 is formed in the bottom plate, a liquid outlet channel is formed in the side wall of the motor housing 2, the mounting hole 31 communicates with the liquid outlet channel through the liquid outlet slot 333, a liquid outlet gap 10 is formed between the volute 1 and the end plate 21, and the liquid outlet channel communicates with the pump chamber 811 through the liquid outlet gap 10. The cooling liquid entering the cooling channel is partially discharged from the liquid through hole 63 in the rotating shaft 61, and the other part is discharged from the liquid outlet channel, so that the liquid discharge amount is increased, and the liquid discharge speed is increased.

As shown in fig. 2, as a preferred embodiment of the present utility model, the electronic water pump further includes a seal member 13 disposed between the scroll casing 1 and the motor casing 2, and between the end mount 3 and the motor casing 2. The arrangement of the sealing piece 13 ensures that the electronic water pump can reach the waterproof requirement and can work normally in water.

Specifically, in this embodiment, the sealing member 13 is a sealing ring.

According to the electronic water pump provided by the utility model, the waterproof sleeve 4 is arranged in the motor casing 2 to divide the stator assembly 5 and the rotor assembly 6 into two areas which are not communicated with each other, the cooling channel is communicated with the pump water chamber 811, the liquid passing gap 9, the liquid passing groove 35 and the liquid passing hole 63, and the cooling liquid entering the cooling channel is the cooling medium in the pump water chamber 811, so that the working temperature inside the motor is cooled by directly utilizing the pumping medium of the electronic water pump, a power device and the cooling medium are not required to be additionally arranged, and the electronic water pump is energy-saving and environment-friendly. The cooling channel enables the inside of the water pump to form a self-cooling circulation system, cooling liquid flows in the electronic water pump to take away heat generated during the operation of the motor and other electronic devices, so that the purpose of cooling is achieved, the cooling channel flows through the inside of the motor, the working temperature of the motor is reduced, the condition that the motor and other controllers burn out or are in thermal protection halt due to overhigh temperature is avoided, and therefore the risk of damage or halt of the water pump is reduced.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The electronic water pump is characterized by comprising a volute, a motor casing with an end plate, an end seat which is assembled with one end of the motor casing into a whole and internally forms an accommodating space, a waterproof sleeve assembled in the accommodating space, a stator assembly, a rotor assembly and an impeller arranged on the rotor assembly;

2. The electronic water pump of claim 1, wherein the end plate extends toward the end seat to form a mounting seat, and two ends of the waterproof sleeve are respectively sleeved on the mounting seat and the support.

3. The electronic water pump of claim 2, wherein sealing rings are arranged between the waterproof sleeve and the support and between the waterproof sleeve and the mounting seat.

4. The electronic water pump of claim 2, wherein the waterproof jacket comprises a jacket body and first and second connection ends bent and extended from both ends of the jacket body;

5. The electronic water pump of claim 1, wherein the liquid passing groove comprises a first groove body formed by recessing from the top of the support toward the opposite bottom thereof and a second groove body communicating the mounting hole and the first groove body;

The first groove bodies and the second groove bodies are all multiple, and the first groove bodies and the second groove bodies are all circumferentially distributed on the support.

6. The electronic water pump of claim 1, wherein the rotor assembly includes a rotor core and a sealing sleeve wrapped outside the rotor core, and a gap formed between the sealing sleeve and the waterproof sleeve is the liquid passing gap.

7. The electronic water pump of claim 1, wherein the impeller comprises a hub, an impeller frame and a plurality of blades, each of the blades are arranged at intervals along the circumferential direction of the impeller frame, the intervals between the blades arranged at intervals are unequal intervals different from each other, the hub is axially fixed on the rotating shaft, the top of the impeller frame is recessed downwards to form an annular groove, and the volute is embedded in the annular groove.

8. The electronic water pump of claim 1, wherein the cooling channel further comprises a liquid outlet channel, the bottom of the support is provided with a liquid outlet hole, the bottom plate is internally provided with a liquid outlet groove communicated with the liquid outlet hole, the side wall of the motor housing is internally provided with a liquid outlet channel, the mounting hole is communicated with the liquid outlet channel through the liquid outlet groove, a liquid outlet gap is formed between the volute and the end plate, and the liquid outlet channel is communicated with the water pumping chamber through the liquid outlet gap.

9. The electronic water pump of any of claims 1-8, further comprising a seal disposed between the volute and the motor housing, the end mount and the motor housing.

10. The electronic water pump of claim 9, wherein the seal is a seal ring.