Electric water pump

Abstract

The utility model provides an electric water pump, which relates to the technical field of water pumps. The electric water pump comprises a housing assembly, an impeller and a volute, wherein the housing assembly is connected to the volute, and the housing assembly and the volute surround an accommodating cavity, wherein the impeller is arranged in the accommodating cavity, and the volute is provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to the accommodating cavity; the housing assembly is provided with a heat dissipation channel and an inlet and an outlet connected to the heat dissipation channel, wherein the inlet and the outlet are arranged at intervals along the circumference of the housing assembly, and wherein the inlet and the outlet are both connected to the accommodating cavity. The utility model can solve the problem that the existing electric water pump cannot dissipate heat in a timely and effective manner, and the electric water pump has a high risk of overheating.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular to an electric water pump. Background Art

[0002] Automobile water pumps include mechanical water pumps and electric water pumps. Electric water pumps have the advantages of compact structure, simple operation, high performance, and convenient later maintenance, making electric water pumps more and more widely used. When the electric water pump is working, the motor and controller will generate a lot of heat, and the temperature of the motor and controller is usually above 150°C. Existing electric water pumps can only rely on the coolant between the motor and the volute to dissipate heat. The space between the motor and the volute is small, and the heat cannot be dissipated in time and effectively. The risk of overheating of the electric water pump is relatively high, and it may even cause the electric water pump to fail. Utility Model Content

[0003] In view of this, the present application provides an electric water pump to solve the problem that the existing electric water pump cannot dissipate heat in a timely and effective manner, and the risk of overheating of the electric water pump is relatively high.

[0004] The present application provides an electric water pump, the electric water pump comprising a housing assembly, an impeller and a volute, the housing assembly and the volute are connected, the housing assembly and the volute surround an accommodating cavity, the impeller is arranged in the accommodating cavity, the volute is provided with a water inlet and a water outlet, the water inlet and the water outlet are both connected to the accommodating cavity;

[0005] The shell component is provided with a heat dissipation channel and an inlet and an outlet communicated with the heat dissipation channel. The inlet and the outlet are arranged at intervals along the circumference of the shell component, and both the inlet and the outlet are communicated with the accommodating cavity.

[0006] Preferably, the heat dissipation channel includes a first heat dissipation channel and a second heat dissipation channel, the housing assembly includes a motor body, the motor body is provided with the first heat dissipation channel and the second heat dissipation channel, the first heat dissipation channel and the second heat dissipation channel are both connected to the accommodating cavity, and the first heat dissipation channel is connected to the second heat dissipation channel.

[0007] Preferably, the heat dissipation channel also includes a cover body, which is connected to the end of the motor body facing away from the volute, and the cover body is provided with a transfer groove, which surrounds a transfer channel, and the first heat dissipation channel and the second heat dissipation channel are both connected to the transfer channel.

[0008] Preferably, the housing assembly further comprises a waterproof sleeve, the waterproof sleeve comprises a fitting portion, the fitting portion is arranged between the volute and the motor body, and the fitting portion and the volute enclose the accommodating cavity;

[0009] The fitting portion is also provided with a first connecting channel and a second connecting channel, both of which pass through the fitting portion, the first heat dissipation channel is connected to the accommodating cavity through the first connecting channel, and the second heat dissipation channel is connected to the accommodating cavity through the second connecting channel.

[0010] Preferably, the electric water pump further includes a controller, and the controller is disposed inside the cover body.

[0011] Preferably, the electric water pump also includes a rotor assembly, a stator assembly and a motor shaft, the stator assembly is connected to the inner wall of the motor body, the rotor assembly is sleeved on the motor shaft, the motor shaft is connected to the impeller, and the rotor assembly and the stator assembly are located on the side of the fitting portion facing away from the accommodating cavity.

[0012] Preferably, the waterproof sleeve further comprises a partition, the partition is connected to the fitting portion, and the partition is located inside the motor body;

[0013] The rotor assembly is arranged inside the partition, and the stator assembly is arranged between the partition and the inner side wall of the motor body.

[0014] Preferably, the volute includes a shell body, a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to one side of the volute in the axial direction, the water outlet pipe is connected to one side of the volute in the radial direction, the water inlet pipe includes a water inlet, and the water outlet pipe includes a water outlet.

[0015] Preferably, the electric water pump further includes a sealing ring, and the sealing ring is arranged between the motor body and the cover body.

[0016] Preferably, the shell component is provided with a plurality of heat dissipation channels, and the plurality of heat dissipation channels are arranged at intervals along the circumference of the shell component.

[0017] In the electric water pump of the present application, the shell component is provided with a heat dissipation channel and an inlet and an outlet connected to the heat dissipation channel, the inlet and the outlet are arranged at intervals along the circumference of the shell component, and the inlet and the outlet are both connected to the accommodating cavity. During the operation of the electric water pump, under the action of the impeller, the coolant in the volute is pressurized along the involute direction, and the coolant pressure at the inlet is greater than the coolant pressure at the outlet, so that the liquid in the volute can enter the heat dissipation channel of the shell component through the inlet and then return to the accommodating cavity of the volute through the outlet. When the coolant flows through the heat dissipation channel of the shell component, the coolant can take away the heat generated by the structure arranged in the shell component and then be discharged through the outlet. In this way, during the operation of the electric water pump, the coolant circulates in the heat dissipation channel to dissipate heat, which improves the heat dissipation efficiency of the electric water pump, reduces the risk of overheating of the electric water pump, and reduces the risk of failure of the motor water pump due to overheating of the motor water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram showing the plan structure of an electric water pump according to an embodiment of the utility model;

[0020] Figure 2 A cross-sectional view showing an electric water pump according to an embodiment of the utility model;

[0021] Figure 3 A flow diagram showing the coolant of the electric water pump according to an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the structure of the watertight sleeve is shown;

[0023] Figure 5 A schematic diagram showing the structure of the motor body is shown;

[0024] Figure 6 A schematic structural diagram of the cover body is shown.

[0025] Icons: 1-volute; 11-casing body; 12-water inlet pipe; 13-water outlet pipe; 2-waterproof sleeve; 21-fitting part; 22-partitioning part; 23-connecting part; 24-first connecting channel; 25-second connecting channel; 3-motor body; 31-first heat dissipation channel; 32-second heat dissipation channel; 4-cover body; 41-adapter groove; 5-impeller; 6-stator assembly; 7-rotor assembly; 81-controller; 82-sealing ring; 83-motor shaft; 91-first mounting block; 92-second mounting block; 93-third mounting block; 94-fourth mounting block; 95-bolt. DETAILED DESCRIPTION

[0026] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0027] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0028] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0031] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0032] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0033] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0034] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0035] The present application provides an electric water pump, such as Figures 1 to 3As shown, the electric water pump includes a housing assembly (including a motor body 3, a cover body 4 and a water-proof sleeve 2), an impeller 5 and a volute 1, the housing assembly and the volute 1 are connected, the housing assembly and the volute 1 surround a receiving cavity, the impeller 5 is arranged in the receiving cavity, the volute 1 is provided with a water inlet and a water outlet, both of which are connected to the receiving cavity; the housing assembly is provided with a heat dissipation channel and an inlet and an outlet connected to the heat dissipation channel, the inlet and the outlet are arranged at intervals along the circumference of the housing assembly, and both of which are connected to the receiving cavity. During the operation of the electric water pump, under the action of the impeller 5, the coolant in the volute 1 is pressurized along the involute direction, and the coolant pressure at the inlet is greater than the coolant pressure at the outlet, so that the liquid in the volute 1 can enter the heat dissipation channel of the housing assembly through the inlet and then return to the receiving cavity of the volute 1 through the outlet. When the coolant flows through the heat dissipation channel of the housing assembly, the coolant can take away the heat generated by the structure arranged in the housing assembly and then be discharged through the outlet. In this way, during the operation of the electric water pump, the coolant circulates in the heat dissipation channel to dissipate heat, thereby improving the heat dissipation efficiency of the electric water pump, reducing the risk of overheating of the electric water pump, and further reducing the risk of failure of the motor water pump due to overheating.

[0036] In addition, the coolant has low viscosity and good fluidity, and can better discharge the heat generated by the structure arranged in the housing assembly from the water outlet as the impeller 5 rotates, thereby achieving the purpose of heat dissipation. Optionally, the coolant can be water, ethylene glycol, etc.

[0037] Furthermore, the inlet is located on the downstream side of the outlet, so that the pressure of the coolant at the inlet is greater than the pressure of the coolant at the outlet. It should be noted that the "downstream side" and the "upstream side" opposite to the "downstream side" are determined according to the flow direction of the coolant in the volute 1. In the flow direction of the coolant, the side close to the water outlet is the downstream side.

[0038] In the embodiments of the present application, Figure 3 As shown, the volute 1 includes a shell body 11, a water inlet pipe 12 and a water outlet pipe 13. The water inlet pipe 12 is connected to one side of the volute 1 in the axial direction, and the water outlet pipe 13 is connected to one side of the volute 1 in the radial direction. The opening of the end of the water inlet pipe 12 away from the shell body 11 is the water inlet, and the opening of the end of the water outlet pipe 13 away from the shell body 11 is the water outlet. The coolant can enter the interior of the volute 1 through the water inlet of the water inlet pipe 12. Under the action of the impeller 5, the coolant in the volute 1 flows out through the water outlet of the water outlet pipe 13 after being pressurized in the involute direction.

[0039] Furthermore, the housing assembly includes a motor body 3, a cover body 4 and a waterproof jacket 2, and the motor body 3 is cylindrical. Figure 2As shown, one end of the motor body 3 is connected to the volute 1, and the other end of the motor body 3 is connected to the cover body 4. The watertight sleeve 2 includes a fitting portion 21 and a partition 22, one side of the fitting portion 21 is fitted with the motor body 3, and the other side of the fitting portion 21 is fitted with the volute 1. The impeller 5 is arranged on the fitting portion 21, and the fitting portion 21 and the volute 1 jointly enclose a receiving cavity. The partition 22 is connected to the side of the fitting portion 21 that is opposite to the receiving cavity, and the partition 22 is located inside the motor body 3.

[0040] Alternatively, if Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the motor body 3 is respectively provided with a first mounting block 91 and a second mounting block 92 at both ends in the axial direction, a connecting portion 23 is provided on the outer wall of the fitting portion 21, a third mounting block 93 is provided on the outer wall of the volute 1, and a fourth mounting block 94 is provided on the outer wall of the cover body 4. Both sides of the connecting portion 23 are respectively fitted with the first mounting block 91 and the third mounting block 93. The bolt 95 passes through the first mounting block 91, the connecting portion 23 and the third mounting block 93 to realize the connection between the motor body 3, the connecting portion 23 and the volute 1. The bolt 95 passes through the second mounting block 92 and the fourth mounting block 94 to realize the connection between the motor body 3 and the cover body 4.

[0041] Optionally, the electric water pump further includes a sealing ring 82 , which is disposed between the motor body 3 and the cover body 4 , thereby achieving sealing between the motor body 3 and the cover body 4 .

[0042] Furthermore, the motor body 3 also includes a stator assembly 6, a rotor assembly 7 and a motor shaft 83. The rotor assembly 7 is sleeved on the motor shaft 83, and the impeller 5 is arranged at the end of the motor shaft 83. When the power of the electric water pump is turned on, the conductor in the rotor assembly 7 cuts the magnetic field, and the generated electromagnetic force drives the rotor assembly 7 to rotate, thereby driving the impeller 5 to rotate through the rotor assembly 7 to generate centrifugal force, converting electrical energy into mechanical energy, and the electric water pump sucks in coolant through the water inlet on the volute 1 and discharges it from the water outlet of the volute 1.

[0043] In addition, the electric water pump further includes a controller 81 , which is disposed inside the cover body 4 .

[0044] In the embodiment of the present application, the heat dissipation channel includes a first heat dissipation channel 31 and a second heat dissipation channel 32. The motor body 3 is provided with the first heat dissipation channel 31 and the second heat dissipation channel 32. The first heat dissipation channel 31 and the second heat dissipation channel 32 are both connected to the accommodating cavity, and the first heat dissipation channel 31 is connected to the second heat dissipation channel 32. In this way, the coolant in the accommodating cavity can return to the accommodating cavity through the inlet, the first heat dissipation channel 31, the second heat dissipation channel 32 and the outlet, thereby realizing cooling of the rotor assembly 7 and the stator assembly 6 arranged in the motor body 3.

[0045] Furthermore, the fitting portion 21 is also provided with a first connecting channel 24 and a second connecting channel 25, both of which penetrate the fitting portion 21 along the axial direction of the motor body 3, the opening of the first connecting channel 24 facing the accommodating cavity is the inlet, and the opening of the second heat dissipation channel 32 facing the accommodating cavity is the outlet, the first heat dissipation channel 31 is connected with the accommodating cavity through the first connecting channel 24, and the second heat dissipation channel 32 is connected with the accommodating cavity through the second connecting channel 25, and the coolant in the accommodating cavity can return to the accommodating cavity through the inlet, the first connecting channel 24, the first heat dissipation channel 31, the second heat dissipation channel 32, the second connecting channel 25 and the outlet, thereby realizing cooling of the rotor assembly 7 and the stator assembly 6 arranged in the motor body 3.

[0046] Optionally, in one embodiment of the heat dissipation channel, the first heat dissipation channel 31 and the second heat dissipation channel 32 both extend along the axial direction of the motor body 3, and a transfer channel is also provided on the motor body 3, the transfer channel extends along the circumferential direction of the motor body 3, and the two ends of the transfer channel in the circumferential direction of the motor body 3 are respectively connected with the first heat dissipation channel 31 and the second heat dissipation channel 32, and in this case, the cover body 4 does not need to be provided with a transfer groove 41. The coolant in the accommodating cavity can return to the accommodating cavity through the inlet, the first connecting channel 24, the first heat dissipation channel 31, the transfer channel, the second heat dissipation channel 32, the second connecting channel 25 and the outlet, so as to cool the rotor assembly 7, the stator assembly 6 and the controller 81.

[0047] In another embodiment of the heat dissipation channel, the first heat dissipation channel 31 and the second heat dissipation channel 32 both extend along the axial direction of the motor body 3, and the first heat dissipation channel 31 and the second heat dissipation channel 32 both penetrate the motor body 3. A transfer groove 41 is provided on the cover body 4, and the transfer groove 41 is recessed from the end surface of the cover body 4 facing the motor body 3 to the inside of the cover body 4, and the transfer groove 41 surrounds a transfer channel, and the first heat dissipation channel 31 and the second heat dissipation channel 32 are both connected to the transfer channel, and the coolant in the accommodating cavity can return to the accommodating cavity through the inlet, the first connecting channel 24, the first heat dissipation channel 31, the transfer channel, the second heat dissipation channel 32, the second connecting channel 25 and the outlet, thereby realizing cooling of the rotor assembly 7 and the stator assembly 6 arranged in the motor body 3 and the controller 81 arranged in the cover body 4.

[0048] Optionally, the shell component may be provided with a plurality of heat dissipation channels, and the plurality of heat dissipation channels are arranged at intervals along the circumference of the shell component. The number of heat dissipation channels on the shell component may be three, four or more. Taking the number of heat dissipation channels as four, and four adapter grooves 41 provided on the cover body 4 as an example, at this time, four first connecting channels 24 and four second connecting channels 25 are provided on the fitting portion 21, and the first connecting channels 24 and the second connecting channels 25 are arranged alternately, and four first heat dissipation channels 31 and four second heat dissipation channels 32 are provided on the motor body 3, and the four first heat dissipation channels 31 and the four second heat dissipation channels 32 are distributed alternately, the four first connecting channels 24 correspond one-to-one with the four first heat dissipation channels 31, the first connecting channels 24 are connected with the corresponding first heat dissipation channels 31, the four second connecting channels 25 correspond one-to-one with the four second heat dissipation channels 32, the second connecting channels 25 are connected with the corresponding second heat dissipation channels 32, and four adapter grooves 41 are provided on the cover body 4, thereby enclosing four adapter channels, and the adjacent first heat dissipation channels 31 and second heat dissipation channels 32 are connected with the same adapter channel. During the operation of the electric water pump, the coolant can circulate in the four heat dissipation channels, thereby achieving heat dissipation for the stator assembly 6 , the rotor assembly 7 and the controller 81 .

[0049] During the use of the electric water pump of the present application, the coolant can enter the interior of the volute 1 through the water inlet of the water inlet pipe 12. Under the action of the impeller 5, the coolant in the volute 1 is pressurized in the involute direction and then flows out through the water outlet of the water outlet pipe 13. At the same time, the coolant circulates in the heat dissipation channel to dissipate heat, thereby improving the heat dissipation efficiency of the electric water pump, reducing the risk of overheating of the electric water pump, and reducing the risk of failure of the motor water pump due to overheating.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An electric water pump, characterized in that: The electric water pump comprises a housing assembly, an impeller and a volute, wherein the housing assembly is connected to the volute, the housing assembly and the volute form a receiving cavity, the impeller is arranged in the receiving cavity, the volute is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both connected to the receiving cavity; The shell component is provided with a heat dissipation channel and an inlet and an outlet communicated with the heat dissipation channel. The inlet and the outlet are arranged at intervals along the circumference of the shell component, and both the inlet and the outlet are communicated with the accommodating cavity.

2. The electric water pump according to claim 1, characterized in that: The heat dissipation channel includes a first heat dissipation channel and a second heat dissipation channel, the housing assembly includes a motor body, the motor body is provided with the first heat dissipation channel and the second heat dissipation channel, the first heat dissipation channel and the second heat dissipation channel are both connected to the accommodating cavity, and the first heat dissipation channel is connected to the second heat dissipation channel.

3. The electric water pump according to claim 2, characterized in that: The heat dissipation channel also includes a cover body, which is connected to the end of the motor body facing away from the volute, and the cover body is provided with a transfer groove, which surrounds a transfer channel, and the first heat dissipation channel and the second heat dissipation channel are both connected to the transfer channel.

4. The electric water pump according to claim 2 or 3, characterized in that: The housing assembly further includes a water-blocking sleeve, the water-blocking sleeve includes a fitting portion, the fitting portion is arranged between the volute and the motor body, and the fitting portion and the volute surround the accommodating cavity; The fitting portion is also provided with a first connecting channel and a second connecting channel, both of which pass through the fitting portion, the first heat dissipation channel is connected to the accommodating cavity through the first connecting channel, and the second heat dissipation channel is connected to the accommodating cavity through the second connecting channel.

5. The electric water pump according to claim 3, characterized in that: The electric water pump further includes a controller, which is disposed inside the cover.

6. The electric water pump according to claim 4, characterized in that: The electric water pump also includes a rotor assembly, a stator assembly and a motor shaft, wherein the stator assembly is connected to the inner side wall of the motor body, the rotor assembly is sleeved on the motor shaft, the motor shaft is connected to the impeller, and the rotor assembly and the stator assembly are located on the side of the fitting portion facing away from the accommodating cavity.

7. The electric water pump according to claim 6, characterized in that: The waterproof sleeve further comprises a partition, the partition is connected to the fitting portion, and the partition is located inside the motor body; The rotor assembly is arranged inside the partition, and the stator assembly is arranged between the partition and the inner side wall of the motor body.

8. The electric water pump according to claim 1, characterized in that: The volute includes a shell body, a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to one side of the volute in the axial direction, the water outlet pipe is connected to one side of the volute in the radial direction, the water inlet pipe includes a water inlet, and the water outlet pipe includes a water outlet.

9. The electric water pump according to claim 3, characterized in that: The electric water pump further includes a sealing ring, which is arranged between the motor body and the cover body.

10. The electric water pump according to claim 4, characterized in that: The shell component is provided with a plurality of heat dissipation channels, and the plurality of heat dissipation channels are arranged at intervals along the circumference of the shell component.

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