Motor oil pump heat dissipation structure and automobile

Abstract

The utility model relates to the technical field of electric motor oil pumps, and in particular to a heat dissipation structure of an electric motor oil pump and an automobile. The heat dissipation structure of the electric motor oil pump includes: a housing assembly, a recessed accommodating cavity is formed inside the housing assembly; a cooling channel is provided in the housing wall of the housing assembly, and a cooling medium is passed through the cooling channel; the cooling channel includes an inlet and an outlet, a branch channel is provided between the inlet and the outlet, the branch channel is arranged around the circumferential side wall of the accommodating cavity, the cooling medium passes from the inlet to the branch channel, and flows out through the outlet after heat exchange between the branch channel and the accommodating cavity. The utility model opens a cooling channel in the housing wall of the housing assembly of the electric motor oil pump, and passes a cooling medium into the interior thereof. After the cooling medium enters the branch channel from the inlet, the heat inside the accommodating cavity can be taken out from the outlet through heat exchange, thereby achieving the purpose of effective heat dissipation.

Description

Technical Field

[0001] The utility model relates to the technical field of motor oil pumps, in particular to a motor oil pump heat dissipation structure and a car. Background Art

[0002] The electric motor oil pump has the advantages of compact structure, simple operation, and convenient later maintenance. With the promotion of the use of electric motor oil pumps, its heat dissipation problem has also been concerned, especially the heat dissipation problem of the motor part and the controller part. The current electric motor oil pump uses air cooling and oil cooling to dissipate heat. Due to the low convection heat transfer coefficient of air and oil, the cooling effect of the motor and controller is not ideal. When the electric motor oil pump is working, the temperature of the motor and controller is usually above 150℃, and the heat cannot be dissipated in time and effectively. The electric motor oil pump is prone to overheating or even failure. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a motor oil pump heat dissipation structure and a vehicle to solve the problem that the heat dissipation effect of the existing motor oil pump cannot meet the cooling requirements of the motor and the controller, and the heat cannot be dissipated in a timely and effective manner, resulting in overheating of the motor oil pump and even failure.

[0004] The utility model provides a first aspect of a heat dissipation structure of an electric motor oil pump, wherein the heat dissipation structure of the electric motor oil pump comprises:

[0005] A shell assembly is formed with a recessed accommodating cavity inside; a cooling channel is opened in the shell wall of the shell assembly, and a cooling medium is passed through the cooling channel;

[0006] The cooling channel includes an inlet, an outlet, and a branch channel connected to the inlet and the outlet. The branch channel is arranged around the circumferential side wall of the accommodating cavity. The cooling medium flows from the inlet to the branch channel, and flows out through the outlet after heat exchange between the branch channel and the accommodating cavity.

[0007] Preferably, the housing assembly comprises a pump cover, a housing body and a rear cover, the housing body is formed into an annular structure, and the pump cover and the rear cover are respectively arranged at two ends of the housing body in the axial direction;

[0008] The housing body and the rear cover form the accommodating cavity.

[0009] Preferably, the cooling channel is opened in the shell walls of the shell body and the rear cover.

[0010] Preferably, the inlet portion and the outlet portion are provided on the shell body.

[0011] Preferably, the motor oil pump heat dissipation structure further includes:

[0012] The sealing member is formed into an annular structure, and is sandwiched between the rear cover and the shell body in the axial direction, and is sandwiched between the accommodating cavity and the cooling channel in the radial direction.

[0013] Preferably, the motor oil pump heat dissipation structure further includes a controller, the controller is disposed in the accommodating cavity, and part of the branch flow channels are arranged around the circumferential side wall of the controller.

[0014] Preferably, the electric motor oil pump heat dissipation structure also includes a motor assembly, which includes a motor shaft, a motor rotor sub-assembly and a motor stator sub-assembly, part of the motor shaft extends into the accommodating cavity, the motor rotor sub-assembly is connected to the part of the motor shaft extending into the accommodating cavity, the motor stator sub-assembly is arranged in the accommodating cavity and is sleeved on the circumferential outer wall of the motor rotor sub-assembly, and part of the branch flow channel surrounds the circumferential outer wall of the motor stator sub-assembly.

[0015] Preferably, a plurality of branch flow channels are provided, and radial dimensions of the inlet and the outlet are larger than the radial dimension of the branch flow channels.

[0016] Preferably, the inlet portion and the outlet portion are respectively communicated with a cooling system on a vehicle, and the cooling medium is a coolant in the cooling system.

[0017] A second aspect of the utility model provides a car, comprising the motor oil pump heat dissipation structure described in any one of the above technical solutions.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The heat dissipation structure of the electric motor oil pump of the utility model is provided with a cooling channel in the shell wall of the shell assembly of the electric motor oil pump, and a cooling medium is introduced into the interior thereof, the cooling channel has a branch channel arranged around the circumferential side wall of the accommodating cavity, after the cooling medium enters the branch channel from the inlet portion, the heat inside the accommodating cavity can be brought out from the outlet portion through heat exchange, thereby achieving the purpose of effective heat dissipation, and avoiding the situation in which the temperature of the electric motor oil pump is too high and the heat cannot be dissipated in time when the electric motor oil pump is working, resulting in overheating or even failure of the electric motor oil pump.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the heat dissipation structure of an electric motor oil pump provided in an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the flow path of the cooling medium in the cooling channel of the motor oil pump heat dissipation structure provided in an embodiment of the utility model.

[0024] Icons: 10-housing assembly; 11-pump cover; 12-housing body; 13-rear cover; 101-accommodating chamber; 100-cooling channel; 110-inlet; 120-outlet; 130-branch channel; 20-seal; 30-controller; 41-motor shaft; 42-motor rotor sub-assembly; 43-motor stator sub-assembly; 44-inner rotor; 45-outer rotor; 50-fastener; 60-positioning piece; 70-sealing structure. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] According to a first aspect of the utility model, a heat dissipation structure of an electric motor oil pump is provided, which includes a housing assembly 10 .

[0035] In this embodiment, if Figure 1 and Figure 2 As shown, a recessed accommodating chamber 101 is formed inside the shell assembly 10, and the controller 30 described below and at least part of the motor assembly are arranged in the accommodating chamber 101. A cooling channel 100 is opened in the shell wall of the shell assembly 10, and a cooling medium is passed through the cooling channel 100. Specifically, the cooling channel 100 includes an inlet portion 110 and an outlet portion 120, and a branch channel 130 connected to the inlet portion 110 and the outlet portion 120. The branch channel 130 is surrounded by the circumferential side wall of the accommodating chamber 101. The cooling medium passes from the inlet portion 110 to the branch channel 130, and flows out through the outlet portion 120 after heat exchange between the branch channel 130 and the accommodating chamber 101, so as to achieve the purpose of heat exchange between the cooling medium and the heat in the accommodating chamber 101, thereby achieving effective heat dissipation and avoiding the situation where the temperature of the motor oil pump is too high and the heat cannot be dissipated in time when the motor oil pump is working, resulting in overheating or even failure of the motor oil pump.

[0036] It should be noted that the cooling channel 100 can be formed in the shell wall of the shell assembly 10 by using a casting process.

[0037] In an optional embodiment, the number of the branch channel 130 in the cooling channel 100 is one. When the number of the branch channel 130 is one, the branch channel 130 may be formed into a spiral structure.

[0038] In a preferred embodiment, the number of branch flow channels 130 is set to be multiple, and the multiple branch flow channels 130 are distributed on the circumferential side walls of the accommodating cavity 101, so that the cooling medium entering from the inlet 110 can flow to different positions through different branch flow channels 130 to achieve sufficient heat exchange and avoid a situation where the heat dissipation capacity of the cooling medium is greatly reduced at the end of the cooling flow channel 100.

[0039] Figure 2 The arrows in the figure indicate the flow path of the cooling medium in the cooling channel 100. When multiple branch channels 130 are provided, optionally, some of the branch channels 130 can be formed into multiple tubular structures extending along the axial direction of the shell assembly 10, and the multiple tubular structures are evenly distributed along the circumference of the shell assembly 10. Some of the branch channels 130 are formed into annular structures connected to all the tubular structures. However, the structure of the branch channels 130 is not limited to this, as long as it can be ensured that the branch channels 130 can be distributed on the side walls of the accommodating cavity 101 to achieve sufficient cooling of the components in the accommodating cavity 101.

[0040] Furthermore, if Figure 2 As shown in FIG. 1 , when the number of branch flow channels 130 is set to be multiple, the radial dimensions of the inlet 110 and the outlet 120 are larger than the radial dimensions of the branch flow channels 130, so as to ensure that the cooling medium is evenly distributed in the branch flow channels 130. It should be noted that the radial dimensions of the inlet 110, the outlet 120 and the branch flow channels 130 are Figure 1 Horizontal direction of viewing angle.

[0041] In this embodiment, the cooling medium may be liquid.

[0042] Preferably, the inlet 110 and the outlet 120 are respectively connected to the cooling system of the automobile, so that the cooling medium introduced into the cooling channel 100 is the coolant in the cooling system. In this way, there is no need to provide an additional cooling medium supply device, which reduces the volume of the motor oil pump heat dissipation structure and facilitates the automobile assembly layout.

[0043] In this embodiment, if Figure 1 As shown, the housing assembly 10 includes a pump cover 11, a housing body 12 and a rear cover 13. The housing body 12 is formed into an annular structure, and the pump cover 11 and the rear cover 13 are respectively formed into cover-shaped structures. The pump cover 11 and the rear cover 13 are respectively arranged at the two ends of the housing body 12 in the axial direction. It should be noted that the axial direction of the housing assembly 10 is Figure 1 Vertical direction of viewing angle.

[0044] In this embodiment, if Figure 1 and Figure 2As shown, the housing body 12 and the rear cover 13 enclose a receiving cavity 101. The cooling channel 100 is provided in the housing walls of the housing body 12 and the rear cover 13, that is, the housing walls of the housing body 12 and the rear cover 13 are both provided with branch channels 130.

[0045] like Figure 2 As shown, the inlet portion 110 and the outlet portion 120 are disposed on the housing body 12 , so as to facilitate the cooling medium to enter and exit the cooling channel 100 .

[0046] In this embodiment, if Figure 1 As shown, the outer walls of the shell body 12 and the rear cover 13 are formed with a protruding connection portion, and the fastener 50 is inserted into the connection portion so that the shell body 12 and the rear cover 13 are fastened and connected. The fastener 50 can be a screw or a bolt. Preferably, a plurality of fasteners 50 are provided, and a plurality of fasteners 50 are arranged at intervals around the circumference of the shell assembly 10 to ensure that the shell body 12 and the rear cover 13 are fastened and connected. In addition, the pump cover 11 and the shell body 12 can be connected by a positioning member 60, and the positioning member 60 can be a positioning pin. Preferably, a plurality of positioning members 60 are provided, and a plurality of positioning members 60 are arranged at intervals around the circumference of the shell assembly 10 to ensure that the shell body 12 and the pump cover 11 are reliably connected.

[0047] In addition, in this embodiment, Figure 1 As shown, the heat dissipation structure of the motor oil pump also includes a seal 20, which is formed into an annular structure. For example, the seal 20 can be an elastic seal ring made of rubber material. The seal 20 is sandwiched between the rear cover 13 and the housing body 12 in the axial direction, and is sandwiched between the accommodating cavity 101 and the cooling channel 100 in the radial direction, so as to prevent the cooling channel 100 from communicating with the accommodating cavity 101, thereby ensuring that the cooling medium does not flow into the accommodating cavity 101. It should be noted that the axial direction of the seal 20 is Figure 1 In the vertical direction of the viewing angle, the radial direction of the sealing ring is Figure 1 The axial direction of the seal 20 is the same as the axial direction of the housing.

[0048] In this embodiment, if Figure 1 and Figure 2 As shown, the heat dissipation structure of the motor oil pump also includes a controller 30, which is disposed in the accommodating cavity 101, and a portion of the branch flow channel 130 is disposed around the circumferential side wall of the controller 30, so that the cooling medium can perform heat exchange for the heat generated by the controller 30, thereby achieving effective heat dissipation of the controller 30. Specifically, the controller 30 is mounted on the rear cover 13 as described above, and the branch flow channel 130 opened on the shell wall of the rear cover 13 can achieve targeted heat dissipation and cooling of the controller 30.

[0049] In addition, in this embodiment, Figure 1 and Figure 2As shown, the heat dissipation structure of the electric motor oil pump also includes a motor assembly. Specifically, the motor assembly includes a motor shaft 41, a motor rotor sub-assembly 42 and a motor stator sub-assembly 43. Part of the motor shaft 41 extends into the accommodating chamber 101, the motor rotor sub-assembly 42 is connected to the part of the motor shaft 41 extending into the accommodating chamber 101, the motor stator sub-assembly 43 is arranged in the accommodating chamber 101 and is sleeved on the circumferential outer wall of the motor rotor sub-assembly 42, and part of the branch flow channel 130 surrounds the circumferential outer wall of the motor stator sub-assembly 43, so that heat exchange is performed on the heat generated by the motor, the heat dissipation effect is improved, and the heat dissipation requirements of the electric motor oil pump are met.

[0050] Furthermore, if Figure 1 As shown, the heat dissipation structure of the electric motor oil pump also includes an inner rotor 44 and an outer rotor 45 that are meshed. The inner rotor 44 and the outer rotor 45 are arranged between the shell body 12 and the pump cover 11. The inner rotor 44 is connected to the side wall of the accommodating cavity 101 extending out of the motor shaft 41, and the outer rotor 45 is sleeved on the outer wall of the inner rotor 44. The motor shaft 41 drives the inner rotor 44 to rotate and drives the outer rotor 45 to rotate through its meshing with the outer rotor 45, so that the volume of the working chamber changes continuously to achieve oil suction and oil discharge.

[0051] In addition, if Figure 1 As shown, a recessed groove is formed on the housing body 12, and the sealing structure 70 is embedded in the groove and abuts against the circumferential side wall of the motor shaft 41, so as to achieve sealing between the motor shaft 41 and the housing body 12. The sealing structure 70 can be an elastic sealing ring.

[0052] It should be noted that the controller 30 and the motor assembly described above are well-known devices in the art, and their specific structures and working principles are not described in detail here.

[0053] According to the heat dissipation structure of the electric motor oil pump of the utility model, a cooling channel is opened in the shell wall of the shell assembly of the electric motor oil pump, and a cooling medium is introduced into the interior thereof, and the cooling channel has a branch channel arranged around the circumferential side wall of the accommodating cavity. After the cooling medium enters the branch channel from the inlet, the heat inside the accommodating cavity can be brought out from the outlet through heat exchange, thereby achieving the purpose of effective heat dissipation and avoiding the situation in which the temperature of the electric motor oil pump is too high and the heat cannot be dissipated in time when the electric motor oil pump is working, resulting in overheating or even failure of the electric motor oil pump.

[0054] The second aspect of the utility model provides an automobile, comprising the motor oil pump heat dissipation structure as described above, and thus having all the beneficial technical effects of the motor oil pump heat dissipation structure, which will not be described in detail herein.

[0055] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A heat dissipation structure for an electric motor oil pump, characterized in that: The electric motor oil pump heat dissipation structure comprises: A shell assembly is formed with a recessed accommodating cavity inside; a cooling channel is opened in the shell wall of the shell assembly, and a cooling medium is passed through the cooling channel; The cooling channel includes an inlet, an outlet, and a branch channel connected to the inlet and the outlet. The branch channel is arranged around the circumferential side wall of the accommodating cavity. The cooling medium flows from the inlet to the branch channel, and flows out through the outlet after heat exchange between the branch channel and the accommodating cavity.

2. The heat dissipation structure of the electric motor oil pump according to claim 1, characterized in that: The housing assembly comprises a pump cover, a housing body and a rear cover, wherein the housing body is formed into an annular structure, and the pump cover and the rear cover are respectively arranged at two ends of the housing body in the axial direction; The housing body and the rear cover form the accommodating cavity.

3. The heat dissipation structure of the electric motor oil pump according to claim 2, characterized in that: The cooling flow channel is opened in the shell wall of the shell body and the rear cover.

4. The heat dissipation structure of the electric motor oil pump according to claim 3, characterized in that: The inlet portion and the outlet portion are provided on the housing body.

5. The heat dissipation structure of the electric motor oil pump according to claim 2, characterized in that: The motor oil pump heat dissipation structure also includes: The sealing member is formed into an annular structure, and is sandwiched between the rear cover and the shell body in the axial direction, and is sandwiched between the accommodating cavity and the cooling channel in the radial direction.

6. The heat dissipation structure of the electric motor oil pump according to claim 1, characterized in that: The motor oil pump heat dissipation structure further includes a controller, which is disposed in the accommodating cavity, and a portion of the branch flow channels is disposed around a circumferential side wall of the controller.

7. The heat dissipation structure of the electric motor oil pump according to claim 1, characterized in that: The electric motor oil pump heat dissipation structure also includes a motor assembly, which includes a motor shaft, a motor rotor sub-assembly and a motor stator sub-assembly. Part of the motor shaft extends into the accommodating cavity, the motor rotor sub-assembly is connected to the part of the motor shaft extending into the accommodating cavity, the motor stator sub-assembly is arranged in the accommodating cavity and is sleeved on the circumferential outer wall of the motor rotor sub-assembly, and part of the branch flow channel surrounds the circumferential outer wall of the motor stator sub-assembly.

8. The heat dissipation structure of the electric motor oil pump according to claim 1, characterized in that: A plurality of branch flow channels are provided, and radial dimensions of the inlet and the outlet are larger than radial dimensions of the branch flow channels.

9. The heat dissipation structure of the electric motor oil pump according to claim 1, characterized in that: The inlet portion and the outlet portion are respectively communicated with a cooling system on a vehicle, and the cooling medium is a coolant in the cooling system.

10. An automobile, characterized in that: It comprises the heat dissipation structure of the electric motor oil pump as claimed in any one of claims 1 to 9.

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