An electric motor cooling device

Abstract

The application discloses a motor cooling device, an upper cover plate and a lower cover plate are covered on a stator shell, the stator shell is provided with a cooling channel, a first through hole, a second through hole, a first flow hole and a second flow hole, the cooling channel is provided with a first barrier and a second barrier, the first barrier and the second barrier separate the cooling channel into a first cooling channel and a second cooling channel, the first through hole is communicated with the first cooling channel, the second through hole is communicated with the second cooling channel, the first flow hole is communicated with the first cooling channel, the second flow hole is communicated with the second cooling channel, the first barrier and the second barrier are arranged between the inner wall of the stator shell and a stator coil to separate a first cooling cavity and a second cooling cavity, the first cooling cavity is communicated with the first cooling channel, the second cooling cavity is communicated with the second cooling channel, and the first cooling cavity and the second cooling cavity are communicated through a gap between the stator coil and a stator inner sleeve. The cooling efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of motor cooling technology, and more particularly to a motor cooling device. Background Technology

[0002] Existing automotive drive motors operate under complex conditions. Due to the inherent structural characteristics of the motor, various losses occur during operation, leading to heat generation. To improve motor efficiency, a cooling system must be designed. Cooling systems are mainly divided into two types: air cooling and liquid cooling. Compared to air cooling, liquid cooling is more efficient.

[0003] Existing liquid cooling systems use external cooling methods, where the cooling medium is in indirect contact with the core components being cooled. This results in low cooling efficiency and affects the lifespan of the motor.

[0004] In existing technologies where the cooling medium directly contacts the motor's heat source, the cooling medium is directly supplied to the stator assembly cavity through a single inlet, relying primarily on internal baffles for flow distribution and circulation. A major drawback is that the flow of the cooling medium depends mainly on the baffles and the stator core itself, easily leading to uneven flow distribution and localized overheating of the stator, thus affecting the overall lifespan of the machine.

[0005] Therefore, how to provide a motor cooling device to improve cooling efficiency is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a motor cooling device to improve cooling efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A motor cooling device includes an upper cover plate, a stator housing, a stator inner sleeve, a stator core, stator coils, a first baffle plate, a second baffle plate, and a lower cover plate, wherein...

[0009] The upper cover plate covers the upper part of the stator housing, and the lower cover plate covers the lower part of the stator housing.

[0010] The stator coil is wound around the stator core, which is disposed between the inner stator sleeve and the outer stator sleeve.

[0011] A cooling channel is provided inside the stator housing. A first through hole and a second through hole are provided on the stator housing. A first barrier and a second barrier are provided inside the cooling channel, dividing the cooling channel into a first cooling channel and a second cooling channel. The first through hole communicates with the first cooling channel, and the second through hole communicates with the second cooling channel.

[0012] The inner wall of the stator housing is provided with a first flow hole and a second flow hole. The first flow hole is connected to the first cooling channel, and the second flow hole is connected to the second cooling channel.

[0013] The first baffle plate and the second baffle plate are disposed between the inner wall of the stator housing and the stator coil to form a first cooling cavity and a second cooling cavity. The first cooling cavity is connected to the first cooling channel, and the second cooling cavity is connected to the second cooling channel. The first cooling cavity and the second cooling cavity are connected through the gap between the stator coil and the stator inner sleeve.

[0014] Preferably, the first barrier and the second barrier are located on a diameter line of the stator housing.

[0015] Preferably, the first flow barrier and the second flow barrier are located on the same diameter line.

[0016] Preferably, the first through hole and the second through hole are located on both sides of the second barrier.

[0017] Preferably, there are multiple first flow holes and multiple second flow holes.

[0018] Preferably, the first flow hole and the second flow hole are arranged in a ring shape and uniformly.

[0019] Preferably, the length direction of the first flow hole and the second flow hole is the axial direction of the stator housing.

[0020] Preferably, the lower cover plate is provided with a first groove for accommodating one end of the stator core.

[0021] Preferably, the upper cover plate is provided with a second groove for accommodating the other end of the stator core.

[0022] Preferably, the upper cover plate is provided with a third through hole communicating with the first through hole and a fourth through hole communicating with the second through hole.

[0023] The motor cooling device provided by this invention includes an upper cover plate, a stator housing, a stator inner sleeve, a stator core, stator coils, a first flow-blocking plate, a second flow-blocking plate, and a lower cover plate, wherein...

[0024] The upper cover plate covers the upper part of the stator housing, and the lower cover plate covers the upper part of the stator housing.

[0025] The stator coil is wound around the stator core, which is disposed between the inner stator sleeve and the outer stator sleeve.

[0026] A cooling channel is provided inside the stator housing. A first through hole and a second through hole are provided on the stator housing. A first barrier and a second barrier are provided inside the cooling channel, dividing the cooling channel into a first cooling channel and a second cooling channel. The first through hole communicates with the first cooling channel, and the second through hole communicates with the second cooling channel.

[0027] The inner wall of the stator housing is provided with a first flow hole and a second flow hole. The first flow hole is connected to the first cooling channel, and the second flow hole is connected to the second cooling channel.

[0028] The first baffle plate and the second baffle plate are disposed between the inner wall of the stator housing and the stator coil to form a first cooling cavity and a second cooling cavity. The first cooling cavity is connected to the first cooling channel, and the second cooling cavity is connected to the second cooling channel. The first cooling cavity and the second cooling cavity are connected through the gap between the stator coil and the stator inner sleeve.

[0029] The cooling medium enters through the first through hole, flows in the first cooling channel and is ejected from the first flow hole dispersed on the first cooling channel. It enters the lower side of the inner cavity of the stator assembly, i.e., the first cooling cavity. After the first cooling cavity is filled with the cooling medium, it enters the upper side of the inner cavity of the stator assembly, i.e., the second cooling cavity. Then it enters the second cooling channel through the second flow hole and finally flows out through the second through hole.

[0030] The motor cooling device provided by this invention uses a flowing cooling medium for cooling, and the cooling medium can completely fill the entire space, making the cooling more thorough. The cooling medium directly contacts the heat-generating components, resulting in higher cooling efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the motor cooling device provided in an embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of the motor cooling device provided in an embodiment of the present invention;

[0034] Figure 3 This is a cross-sectional structural schematic diagram of the stator housing provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the upper cover plate provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the lower cover plate provided in an embodiment of the present invention.

[0037] superior Figure 1-5 middle:

[0038] Upper cover plate 11, stator housing 12, stator inner sleeve 13, stator core 14, stator coil 15, first baffle plate 16, lower cover plate 17, first flow hole 18, second flow hole 19, first through hole 20, second through hole 21, third through hole 22, fourth through hole 23, second baffle plate 24, first cooling channel 25, second cooling channel 26, first cooling cavity 27, second cooling cavity 28, first groove 29, second groove 30, first barrier 31, second barrier 32. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please refer to Figures 1 to 5 , Figure 1 This is a schematic diagram of the structure of the motor cooling device provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the motor cooling device provided in an embodiment of the present invention; Figure 3 This is a cross-sectional structural schematic diagram of the stator housing provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the upper cover plate provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the lower cover plate provided in an embodiment of the present invention.

[0041] The motor cooling device provided in this embodiment of the invention includes an upper cover plate 11, a stator housing 12, a stator inner sleeve 13, a stator core 14, a stator coil 15, a first flow-blocking plate 16, a second flow-blocking plate 24, and a lower cover plate 17, wherein...

[0042] The upper cover plate 11 covers the upper part of the stator housing 12, and the lower cover plate 17 covers the lower part of the stator housing 12.

[0043] The stator coil 15 is wound around the stator core 14, which is positioned between the inner stator sleeve 13 and the outer stator sleeve 12.

[0044] A cooling channel is provided inside the stator housing 12. A first through hole 20 and a second through hole 21 are provided on the stator housing 12. A first barrier 31 and a second barrier 32 are provided inside the cooling channel, dividing the cooling channel into a first cooling channel 25 and a second cooling channel 26. The first through hole 20 communicates with the first cooling channel 25, and the second through hole 21 communicates with the second cooling channel 26.

[0045] The inner ring wall of the stator housing 12 is provided with a first flow hole 18 and a second flow hole 19. The first flow hole 18 is connected to the first cooling channel 25, and the second flow hole 19 is connected to the second cooling channel 26.

[0046] The first baffle plate 16 and the second baffle plate 24 are disposed between the inner wall of the stator housing 12 and the stator coil 15 to form a first cooling cavity 27 and a second cooling cavity 28. The first cooling cavity 27 is connected to the first cooling channel 25, and the second cooling cavity 28 is connected to the second cooling channel 26. The first cooling cavity 27 and the second cooling cavity 28 are connected through the gap between the stator coil 15 and the stator inner sleeve 13.

[0047] The cooling medium enters through the first through hole 20, flows in the first cooling channel 25 and is sprayed out from the first flow hole 18 dispersed on the first cooling channel 25, entering the lower side of the inner cavity of the stator assembly, i.e. the first cooling cavity 27. After the first cooling cavity 27 is filled with cooling medium, it enters the upper side of the inner cavity of the stator assembly, i.e. the second cooling cavity 28, and then enters the second cooling channel 26 through the second flow hole 19 and finally flows out from the second through hole 21.

[0048] The motor cooling device provided in this embodiment of the invention uses a flowing cooling medium for cooling, and the cooling medium can completely fill the entire space, making the cooling more thorough. The cooling medium directly contacts the heat-generating components, resulting in higher cooling efficiency.

[0049] To further optimize the above scheme, the first barrier 31 and the second barrier 32 are located on a diameter line of the stator housing 12. The first baffle plate 16 and the second baffle plate 24 are located on the same diameter line.

[0050] To further optimize the above scheme, the first through hole 20 and the second through hole 21 are located on both sides of the second barrier 24.

[0051] To further optimize the above scheme, there are multiple first flow holes 18 and second flow holes 19. The first flow holes 18 and second flow holes 19 are evenly arranged in a ring. The length direction of the first flow holes 18 and second flow holes 19 is the axial direction of the stator housing 12.

[0052] To further optimize the above solution, the lower cover plate 17 is provided with a first groove 29 for accommodating one end of the stator core 14. The upper cover plate 11 is provided with a second groove 30 for accommodating the other end of the stator core 14.

[0053] To further optimize the above scheme, the upper cover plate 11 is provided with a third through hole 22 that communicates with the first through hole 20 and a fourth through hole 23 that communicates with the second through hole 21.

[0054] The motor cooling device provided in this embodiment of the invention is a highly efficient disc motor cooling solution. It uses coolant to directly cool the main heat source of the motor, thereby improving cooling efficiency and enhancing motor performance.

[0055] In practice:

[0056] The motor cooling device provided in this embodiment of the invention comprises an upper cover plate 11, a stator housing 12, a stator inner sleeve 13, a stator core 14, a stator coil 15, a first baffle plate 16, a second baffle plate 24, and a lower cover plate 17. The stator housing 12 is provided with liquid inlet / outlet ports, namely a third through hole 22 and a fourth through hole 23; cooling channels, namely a first cooling channel 25 and a second cooling channel 26; liquid spray ports, namely a first flow hole 18 and a second flow hole 19; and upper and lower baffles, namely a first baffle 31 and a second baffle 32, which uniformly divide the inner cavity of the stator housing 12 into two parts. The lower cover plate 17 is provided with evenly distributed first grooves 29, and the upper cover plate 11 is provided with liquid inlet / outlet ports and evenly distributed second grooves 30. Specifically, the upper and lower cover plates are fixed to the stator housing 12, the stator inner sleeve 13 is fixed between the upper and lower cover plates 11 and 17, the stator core 14 is fixed in the grooves of the upper and lower cover plates and is evenly distributed, the stator coil 15 is wound on the stator core 14, the first baffle plate 16 and the second baffle plate 24 are fixed between the upper and lower cover plates, and the two sides are respectively attached to the stator housing 12 and the stator coil 15.

[0057] The specific implementation is as follows: Coolant flows into the lower part of the inner cavity of the stator housing 12 through the inlet, i.e., the third through hole 22 and the first through hole 20, and is sprayed onto the stator core 14 and stator coil 15 through the spray nozzle, i.e. the first flow hole 18. The stator assembly is placed horizontally along the center line of the upper and lower barriers of the stator housing 12. The coolant flows between the stator coils 15. The first baffle plate 16 and the second baffle plate 24 are placed horizontally, dividing the inner cavity of the stator assembly into upper and lower parts evenly. When the lower half of the stator assembly is filled with coolant, the coolant will flow into the upper half of the inner cavity of the stator assembly through the side of the stator inner sleeve 13, and then flow into the cavity of the stator housing 12 through the spray hole, i.e. the second flow hole 19, and finally flow out through the outlet, i.e. the second through hole 21 and the fourth through hole 23. Since the first baffle plate 16, the second baffle plate 24 and the stator housing 12 are symmetrically distributed, all inlet and outlet ports can be interchanged, but it must be ensured that the stator assembly is placed horizontally along the center line of the barriers.

[0058] The motor cooling device provided in this embodiment of the invention has the advantage that, after the coolant flows into the stator housing 12, it first flows into the lower cavity of the stator housing 12, then is sprayed into the lower side of the stator assembly inner cavity through the spray nozzle. After the lower side is filled with the cooling medium, it flows into the upper side of the stator assembly inner cavity, then flows into the upper cavity of the stator housing 12 through the spray nozzle, and finally flows out through the outlet. The stator assembly inner cavity is symmetrically distributed vertically, ensuring that the inlet is always on the lower side, and the inlet and outlet holes can be interchanged. The cooling medium can completely fill the entire space, making cooling more thorough, and the cooling medium directly contacts the heat-generating components, resulting in higher cooling efficiency.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor cooling device, characterized in that, It includes an upper cover plate, a stator housing, a stator inner sleeve, a stator core, stator coils, a first baffle plate, a second baffle plate, and a lower cover plate, wherein, The upper cover plate covers the upper part of the stator housing, and the lower cover plate covers the lower part of the stator housing. The stator coil is wound around the stator core, which is disposed between the inner stator sleeve and the outer stator sleeve. A cooling channel is provided inside the stator housing. A first through hole and a second through hole are provided on the stator housing. A first barrier and a second barrier are provided inside the cooling channel, dividing the cooling channel into a first cooling channel and a second cooling channel. The first through hole communicates with the first cooling channel, and the second through hole communicates with the second cooling channel. The inner wall of the stator housing is provided with a first flow hole and a second flow hole. The first flow hole is connected to the first cooling channel, and the second flow hole is connected to the second cooling channel. The first baffle plate and the second baffle plate are disposed on the inner wall of the stator housing and between the stator coil to separate a first cooling cavity and a second cooling cavity. The first cooling cavity is connected to the first cooling channel, and the second cooling cavity is connected to the second cooling channel. The first cooling cavity and the second cooling cavity are connected through the gap between the stator coil and the stator inner sleeve. The first barrier and the second barrier are located on a diameter line of the stator housing and are placed horizontally; the first through hole and the second through hole are located on both sides of the second barrier, so that the coolant flows into the lower cavity of the stator housing first.

2. The motor cooling device according to claim 1, characterized in that, The first flow barrier and the second flow barrier are located on the same diameter line.

3. The motor cooling device according to claim 1, characterized in that, Both the first flow hole and the second flow hole are multiple.

4. The motor cooling device according to claim 3, characterized in that, The first flow hole and the second flow hole are arranged in a ring and uniformly.

5. The motor cooling device according to claim 3, characterized in that, The length direction of the first flow hole and the second flow hole is the axial direction of the stator housing.

6. The motor cooling device according to claim 1, characterized in that, The lower cover plate is provided with a first groove for accommodating one end of the stator core.

7. The motor cooling device according to claim 6, characterized in that, The upper cover plate is provided with a second groove for accommodating the other end of the stator core.

8. The motor cooling device according to claim 1, characterized in that, The upper cover plate has a third through hole communicating with the first through hole and a fourth through hole communicating with the second through hole.

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