A cooling system and a motor

Abstract

The present invention discloses a cooling system and a motor, the cooling system comprising: a liquid spray cavity provided on the shell for holding liquid; a liquid inlet connected to the liquid spray cavity; a liquid outlet connected to the closed cavity; and a liquid spray assembly provided on the inner wall of the shell corresponding to the stator core. When the cooling system of the present invention is adopted, the liquid enters the liquid spray cavity from the liquid inlet, and is sprayed toward the stator core located in the closed cavity through the liquid spray assembly, and the liquid sprayed by the liquid spray assembly exchanges heat with the stator core before flowing out from the liquid outlet. Compared with the prior art, the circulating liquid directly exchanges heat with the stator core, thereby improving the cooling efficiency of the motor and extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a cooling system and a motor. Background Art

[0002] The operating conditions of existing automobile drive motors are complex. Due to the structural characteristics of the motor itself, various losses will occur during the operation of the motor, causing the motor to heat up. In order to improve the working efficiency of the motor, a cooling system must be designed for the motor. There are two main types of cooling systems: air cooling and liquid cooling. Compared with air cooling, liquid cooling is more efficient. The existing liquid cooling system mainly adopts external cooling, that is, the coolant is in indirect contact with the core components to be cooled, and the cooling efficiency is low, which affects the service life of the motor. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is how to improve the cooling efficiency of the motor and extend the service life of the motor. To this end, the present invention provides a cooling system and a motor.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A cooling system for cooling a stator core, the cooling system comprising a housing and a closed cavity for containing the stator core, the cooling system further comprising:

[0006] A liquid spraying cavity disposed on the housing for containing liquid;

[0007] a liquid inlet communicated with the liquid spray cavity;

[0008] a liquid outlet communicated with the closed cavity; and

[0009] A liquid spraying assembly is arranged on the inner wall of the housing corresponding to the stator core.

[0010] In one embodiment of the present invention, the housing comprises:

[0011] A stator housing surrounding the circumference of the stator core;

[0012] An upper cover plate and a lower cover plate closing both ends of the stator housing; and

[0013] A middle sleeve is located in the middle of the stator housing. The stator housing, the upper cover plate, the lower cover plate and the middle sleeve form the closed cavity.

[0014] In another embodiment of the present invention, a first baffle is provided on the inner wall of the stator housing, and the area of ​​the closed cavity close to the liquid outlet is divided into a liquid return area, and the area close to the liquid spraying assembly is divided into a liquid spraying area by the first baffle.

[0015] In yet another embodiment of the present invention, there are two first baffles, which are respectively located on both sides of the liquid outlet.

[0016] In yet another embodiment of the present invention, a second baffle is provided at a portion of the intermediate sleeve close to the liquid outlet.

[0017] In yet another embodiment of the present invention, the liquid inlet and / or the liquid outlet are arranged on the stator housing.

[0018] In yet another embodiment of the present invention, the liquid inlet and the liquid outlet are centrally arranged on an external connection port of the housing.

[0019] In yet another embodiment of the present invention, the liquid spray cavity is an annular structure.

[0020] In yet another embodiment of the present invention, there are multiple liquid spray assemblies, and each of the liquid spray assemblies corresponds to a coil gap of the stator core.

[0021] The present invention further discloses a motor, comprising a stator core and a cooling system, wherein the cooling system is any one of the cooling systems described above.

[0022] In yet another embodiment of the present invention, the motor is an axial magnetic field motor.

[0023] It can be seen from the above technical solution that when the cooling system of the present invention is used, the liquid enters the liquid spray cavity from the liquid inlet, and is sprayed to the stator core located in the closed cavity through the liquid spray component. The liquid sprayed by the liquid spray component exchanges heat with the stator core and then flows out from the liquid outlet. Compared with the prior art, the circulating liquid directly contacts the stator core for heat exchange, thereby improving the cooling efficiency of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of an explosion structure of a cooling system provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a cooling system provided by an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the principle of a cooling system provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the principle of another cooling system provided by an embodiment of the present invention.

[0029] In the figure, 100 is the shell, 200 is the stator core, 300 is the liquid inlet, 400 is the liquid outlet, 500 is the liquid spray cavity, 600 is the liquid spray assembly, 700 is the first spoiler, 800 is the second spoiler, 101 is the stator shell, 102 is the upper cover plate, 103 is the lower cover plate, 104 is the intermediate sleeve, and 1011 is the external port. DETAILED DESCRIPTION

[0030] The core of the present invention is to provide a motor to improve the cooling efficiency of the motor and extend the service life of the motor.

[0031] In addition, the embodiments shown below do not limit the invention described in the claims in any way. In addition, all the contents of the configurations shown in the embodiments below are not limited to the solutions required as the invention described in the claims.

[0032] See also Figures 1 to 4 The cooling system in the embodiment of the present invention is used for cooling the stator core 200, and the cooling system includes: a shell 100; a closed cavity for holding the stator core 200; a liquid spraying cavity 500 arranged on the shell 100 for holding liquid; a liquid inlet 300 connected to the liquid spraying cavity 500; a liquid outlet 400 connected to the closed cavity; and a liquid spraying assembly 600 arranged on the inner wall of the shell 100 corresponding to the stator core 200.

[0033] When the cooling system of the present invention is used, the liquid enters the liquid spraying cavity 500 from the liquid inlet 300, and is sprayed toward the stator core 200 located in the closed cavity through the liquid spraying assembly 600. The liquid sprayed by the liquid spraying assembly 600 exchanges heat with the stator core 200, and then flows out from the liquid outlet 400. Compared with the prior art, the circulating liquid directly contacts and exchanges heat with the stator core 200, thereby improving the cooling efficiency of the motor and extending the service life of the motor.

[0034] It should be noted that the above-mentioned shell 100 is used to hold the stator core 200, and a closed cavity is formed inside. When the stator core 200 is installed in the closed cavity, the liquid sprayed by the spray assembly 600 can flow through the gap of the coil of the stator core 200, and finally flow out from the liquid outlet 400, thereby forming a cooling circulation loop.

[0035] The liquid spray cavity 500 is arranged in the shell wall of the housing 100, that is, the part where the liquid spray cavity 500 is arranged is a hollow structure, and the liquid spray cavity 500 can be adjusted according to the part where the liquid spray assembly 600 is arranged, for example, it can be the peripheral part of the housing 100 surrounding the stator core 200, and it can be the end surface part of the housing 100. The arrangement positions of the liquid inlet 300 and the liquid outlet 400 are also determined according to the arrangement position of the liquid spray cavity 500.

[0036] The shape of the housing 100 can be any shape, as long as the liquid spraying cavity 500 and the liquid spraying assembly 600 can be provided, it is within the protection scope of the present invention. In one embodiment of the present invention, the housing 100 includes:

[0037] A stator housing 101 surrounding the circumference of the stator core 200;

[0038] An upper cover plate 102 and a lower cover plate 103 that close both ends of the stator housing 101; and

[0039] The middle sleeve 104 is located in the middle of the stator housing 101 . The stator housing 101 , the upper cover plate 102 , the lower cover plate 103 and the middle sleeve 104 form a closed cavity.

[0040] It can be seen that in the embodiment of the present invention, the shell 100 is divided into four parts as a whole. The shell 100 can also be divided into three parts according to specific needs. For example, the upper cover plate 102 and the stator housing 101 are treated as an integrated structure, and the lower cover plate 103 and the stator housing 101 are treated as an integrated structure, or a part of the stator housing 101 and the upper cover plate 102 are treated as an integrated structure, and the other part of the stator housing 101 and the lower cover plate 103 are treated as an integrated structure, and so on.

[0041] In order to further improve the cooling efficiency, in another embodiment of the present invention, a first baffle 700 is provided on the inner wall of the stator housing 101, and the area of ​​the closed cavity close to the liquid outlet 400 is divided into a liquid return area, and the area close to the spray assembly 600 is divided into a spray area through the first baffle 700.

[0042] Under the action of the first baffle 700, the closed cavity is divided into a liquid return area and a liquid spraying area. In the liquid spraying area, the liquid spraying assembly 600 sprays liquid. After the liquid sprayed exchanges heat with the stator core 200, it is collected in the liquid return area and flows out through the liquid outlet 400. Therefore, under the action of the first baffle 700, the liquid sprayed by the liquid spraying assembly 600 can flow uniformly from the outside to the inside of the stator core 200, so that the stator core 200 can be evenly cooled.

[0043] The number of the first baffles 700 can be one or more, and any structure that can block the flow of liquid is within the protection scope of the present invention. In the figure, there are two first baffles 700, which are respectively located on both sides of the liquid outlet 400. Thus, the area between the two first baffles 700 close to the liquid outlet 400 forms a liquid return area, and the area away from the liquid outlet 400 forms a liquid spraying area, and the liquid spraying components 600 are all arranged on the inner wall of the stator housing 101 in the liquid spraying area.

[0044] Furthermore, a second spoiler 800 is provided near the liquid outlet 400 of the intermediate sleeve 104. The second spoiler 800 is used to make the liquid inside the stator core 200 flow evenly from the inside of the stator core 200 to the liquid return area to improve the cooling efficiency.

[0045] According to the structure of the housing, the liquid spraying cavity 500 can be arranged on the stator housing 101, the upper cover plate 102 or the lower cover plate 103, and the corresponding liquid inlet 300 and liquid outlet 400 can be arranged on the stator housing 101, the upper cover plate 102 or the lower cover plate 103. In the embodiment of the present invention, the liquid spraying cavity 500 is arranged on the stator housing 101, and the liquid inlet 300 and / or the liquid outlet 400 are arranged on the stator housing 101.

[0046] The liquid spraying cavity 500 includes one or two liquid inlets 300. When there is one liquid inlet 300, the liquid inlet is arranged at one end of the liquid spraying cavity 500. Figure 3 When there are two liquid inlets 300, the two liquid inlets 300 are arranged at both ends of the liquid spraying cavity 500, such as Figure 4 shown.

[0047] There are two liquid inlets 300, located at two ends of the liquid spraying cavity 500, and the external port of the liquid inlet 300 has an outlet. Alternatively, there is one liquid inlet 300, located at one end of the liquid spraying cavity 500, and the corresponding external port of the liquid inlet 300 has an outlet.

[0048] When disposed on the stator housing 101, the liquid spray cavity 500 may be an annular structure, surrounding the entire stator housing 101, or surrounding a portion of the stator housing 101. In order to simplify the processing technology, the liquid inlet 300 and the liquid outlet 1014 are centrally disposed on the external port 1011 of the first housing 100. Of course, the external ports 1011 of the liquid inlet 300 and the liquid outlet 1014 may be separately disposed as needed.

[0049] Furthermore, when two liquid inlets 300 are provided and the two liquid inlets 300 are located at both ends of the liquid spraying cavity 500 , a partition is provided in the middle of the liquid spraying cavity 500 to prevent the liquid in the middle from forming turbulence.

[0050] It should be noted that the stator housing 101 is an integrated structure or a split structure, wherein the so-called integrated structure means that the structure of the liquid spraying cavity 500 is processed together with the stator housing 101, for example, by a casting process. When the stator housing 101 is a split structure, the stator housing 101 includes: a stator base shell with a hollow structure, and a sealing ring for sealing the hollow structure, and the sealing ring and the stator base shell together surround the liquid spraying cavity 500.

[0051] The function of the liquid spray component 600 is to cool the stator core 200 by spraying. In the embodiment of the present invention, the liquid spray component is a nozzle. The liquid injected into the liquid spray cavity 500 has a certain pressure. Under the action of pressure, the liquid sprayed by the liquid spray component 600 is a fine liquid, thereby increasing the contact area between the liquid and the stator core 200. The number of liquid spray components 600 is one or more, and multiple liquid spray components 600 can further increase the liquid spray area of ​​the liquid spray component 600. Furthermore, each liquid spray component 600 corresponds to the coil gap of the stator core 200, and each coil gap corresponds to a liquid spray component. The liquid sprayed by the liquid spray component can directly contact the heat source, and the cooling effect is better. The liquid can be evenly diverted under the action of the first spoiler 700 and the second spoiler 800, and the cooling is more uniform, which greatly reduces the temperature of the stator core 200.

[0052] The present invention also discloses a motor, including a stator core 200 and a cooling system, wherein the cooling system is any of the above cooling systems. Since the above cooling system has the above effects, the motor including the above cooling system also has corresponding effects, which will not be described in detail here.

[0053] In yet another embodiment of the present invention, the motor is a radial magnetic field motor or an axial magnetic field motor, and preferably an axial magnetic field motor is used.

[0054] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling system for cooling a stator core, the cooling system comprising a housing and a closed cavity for containing the stator core, characterized in that: The cooling system further comprises: A liquid spraying cavity disposed on the housing for containing liquid; a liquid inlet communicated with the liquid spray cavity; a liquid outlet communicated with the closed cavity; and A liquid spraying assembly disposed on the inner wall of the housing corresponding to the stator core; The housing comprises: A stator housing surrounding the circumference of the stator core; An upper cover plate and a lower cover plate closing both ends of the stator housing; and An intermediate sleeve located in the middle of the stator housing, wherein the stator housing, the upper cover plate, the lower cover plate and the intermediate sleeve form the closed cavity; The liquid spray cavity is an annular structure and surrounds the entire stator housing; There are multiple liquid spraying assemblies, and each of the liquid spraying assemblies corresponds to a coil gap of the stator core.

2. The cooling system according to claim 1, characterized in that A first baffle is provided on the inner wall of the stator housing, and the first baffle is used to separate the area of ​​the closed cavity close to the liquid outlet into a liquid return area, and the area close to the liquid spraying assembly into a liquid spraying area.

3. The cooling system according to claim 2, characterized in that The number of the first baffles is two, which are respectively located on both sides of the liquid outlet.

4. The cooling system according to claim 1, characterized in that A second spoiler is arranged at a portion of the intermediate sleeve close to the liquid outlet.

5. The cooling system according to claim 1, characterized in that: The liquid inlet and / or the liquid outlet is arranged on the stator housing.

6. The cooling system according to any one of claims 1 to 5, characterized in that: The liquid inlet and the liquid outlet are centrally arranged on the external connection port of the shell.

7. A motor comprising a stator core and a cooling system, characterized in that: The cooling system is the cooling system according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that The motor is an axial magnetic field motor.

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