Motor exhaust structure

Abstract

The utility model discloses a motor exhaust structure which comprises a valve body, a motor and an air pipe, the valve body is located in the motor and fixed on a stator in the motor, the valve body is provided with an exhaust channel, the air pipe is connected with the valve body and penetrates out of the motor, and two ends of the air pipe are respectively communicated with the exhaust channel and external air. In the working process of the motor, the temperature of the motor rises to cause the air pressure in the motor to rise, air can be discharged from the motor in time through the exhaust channel and the air pipe, and meanwhile, cooling liquid carried by the air can be filtered through the valve body and flows back into the motor through the exhaust channel, so that the motor cooling liquid is prevented from being reduced and the service life of the motor is prolonged. And the working safety of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, and in particular to an exhaust structure for an electric motor. Background Technology

[0002] Liquid-cooled motors are motors with good heat dissipation performance, which can prevent the internal magnets from demagnetizing and the parts from rusting due to high temperatures during long-term operation. However, the high temperature generated by the motor operation increases the gas pressure inside the motor, and the liquid will be carried out of the motor by the gas, resulting in a reduction of the motor coolant, which in turn endangers electrical and mechanical safety. Therefore, this needs to be improved. Summary of the Invention

[0003] This invention addresses the shortcomings of existing liquid-cooled motors, such as the reduction of coolant during operation due to the discharge of coolant with hot air, which endangers electrical and mechanical safety. It provides a new motor exhaust structure.

[0004] To solve the above-mentioned technical problems, this utility model achieves this through the following technical solution:

[0005] An exhaust structure for an electric motor includes a valve body and an electric motor, and also includes an air pipe. The valve body is located inside the electric motor and fixed to the stator inside the electric motor. The valve body has an exhaust channel. The air pipe is connected to the valve body and extends out of the electric motor. The two ends of the air pipe are respectively connected to the exhaust channel and the outside air.

[0006] During motor operation, the increase in motor temperature leads to an increase in internal air pressure. The gas can be discharged from the motor in a timely manner through the exhaust channel and air pipe. At the same time, the valve body can filter the coolant carried by the gas and allow the coolant to flow back into the motor through the exhaust channel, preventing the motor coolant from decreasing and improving the safety of the motor during operation.

[0007] Preferably, in the above-described motor exhaust structure, the valve body is located in the upper half of the motor, and one end of the exhaust channel is set to face downwards.

[0008] The valve body is fixed to the upper part of the motor, making it difficult for the coolant that has sunk to the lower part of the motor to be thrown into the valve body when the motor is working. At the same time, because one end of the exhaust channel is set to face downwards, it is beneficial for the coolant that enters the exhaust channel to flow back into the motor.

[0009] Preferably, in the above-described motor exhaust structure, the valve body includes a filter chamber and a quick connector. The filter chamber has a storage cavity, and a filter element is detachably installed inside the filter cavity. The filter element has an air inlet communicating with the storage cavity and the outside. The upper end of the filter chamber has an air outlet communicating with the storage cavity. A transition channel runs through the quick connector, and both ends of the quick connector are connected to an air pipe and the filter chamber, respectively. The transition channel communicates with the air outlet. The air inlet, storage cavity, air outlet, and transition channel are distributed from bottom to top, and the air inlet, storage cavity, air outlet, and transition channel together form the exhaust channel.

[0010] The filter element filters the coolant that enters the valve body with the gas, effectively preventing the coolant from being discharged out with the gas.

[0011] Preferably, in the above-described motor exhaust structure, the filter element includes a column and filter plates distributed on the side wall of the column. The air inlet is distributed in the lower part of the column, the filter plate is located above the air inlet, and the end of the filter plate extends towards the inner wall of the liquid storage chamber and is in contact with the inner wall of the liquid storage chamber.

[0012] The filter plate effectively blocks the coolant, causing the coolant thrown into the storage chamber by the motor to lose its impact force and sink under the action of gravity, flowing back into the motor through the air inlet, further reducing the overflow of coolant.

[0013] Preferably, in the above-described motor exhaust structure, the number of filter plates is set to several, and the several filter plates are distributed along the gas flow direction in the liquid storage chamber, with adjacent filter plates arranged alternately.

[0014] The filter plates are multiple and staggered, which can divide the liquid storage chamber into multiple flow channels at multiple angles, thereby extending the distance that the gas needs to travel. During this process, the kinetic energy of the cooling liquid entering the liquid storage chamber is gradually consumed. The cooling liquid that has consumed its kinetic energy also flows back into the motor, thus achieving the filtration of cooling liquid in the exhaust gas, effectively collecting the cooling liquid, and further reducing the overflow of cooling liquid.

[0015] Preferably, in the above-described motor exhaust structure, the filter plate is inclined along the gas flow direction in the liquid storage chamber, and the end of the filter plate is inclined towards the air outlet.

[0016] The filter plate is set at an angle, so that the liquid that comes into contact with the filter plate can flow back down along the filter plate into the motor, which is more conducive to collecting and returning the coolant into the motor.

[0017] Preferably, in the above-described motor exhaust structure, the upper inner wall of the liquid storage chamber protrudes downward along the height direction to form the air outlet, and the width of the air outlet gradually increases upward along the height direction.

[0018] The air outlet is designed to be larger at the top and smaller at the bottom, and the air outlet protrudes downwards into the liquid storage chamber. This facilitates the discharge of gas that enters the liquid storage chamber through the air outlet, while making it difficult for coolant to pass through, thus further reducing coolant overflow.

[0019] As a preferred embodiment, in the above-described motor exhaust structure, the filter element further includes a fixed platform, the end of the column protruding from the fixed platform, the fixed platform being smaller at the top and larger at the bottom, and the lower part of the fixed platform having a mating surface, the upper part of the fixed platform being inserted into the liquid storage chamber for insertion and mating, and the lower end of the valve body abutting against the mating surface and being welded to the mating surface.

[0020] The filter element is welded to the valve body through mating surfaces, which improves the reliability of the filter element installation on the valve body. At the same time, because the fixing platform is set with a smaller top and a larger bottom, the installation position of the filter element and the valve body can also be pre-positioned through the mating surfaces, which facilitates the assembly of the filter element and the valve body. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the present invention;

[0022] Figure 2 This is an exploded structural diagram of the valve body and filter element of this utility model;

[0023] Figure 3 This is a cross-sectional view of the valve body, filter element, and air pipe of this utility model.

[0024] Explanation of reference numerals in the attached drawings: Valve body 1; Motor 10; Filter chamber 11; Liquid storage chamber 111; Air outlet 112; Quick connector 12; Transition flow channel 121; Air pipe 2; Exhaust channel 3; Filter element 4; Air inlet 41; Column 42; Filter plate 43; Fixing platform 44; Mating surface 441. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention:

[0026] Example 1

[0027] like Figures 1-3 As shown, an exhaust structure for an electric motor includes a valve body 1 and an electric motor 10, and also includes an air pipe 2. The valve body 1 is located inside the electric motor 10 and fixed on the stator inside the electric motor 10. The valve body 1 has an exhaust channel 3. The air pipe 2 is connected to the valve body 1 and passes through the electric motor 10. The two ends of the air pipe 2 are respectively connected to the exhaust channel 3 and the outside air.

[0028] Preferably, the valve body 1 is located on the upper half of the motor 10, and one end of the exhaust channel 3 is set to face downwards.

[0029] Preferably, the valve body 1 includes a filter chamber 11 and a quick connector 12. The filter chamber 11 has a storage cavity 111, and a filter element 4 is detachably installed in the storage cavity 111. The filter element 4 has an air inlet 41 that communicates with the storage cavity 111 and the outside. The upper end of the filter chamber 11 has an air outlet 112 that communicates with the storage cavity 111. A transition channel 121 runs through the quick connector 12. The two ends of the quick connector 12 are connected to the air pipe 2 and the filter chamber 11, respectively. The transition channel 121 communicates with the air outlet 112. The air inlet 41, the storage cavity 111, the air outlet 112, and the transition channel 121 are distributed from bottom to top. The air inlet 41, the storage cavity 111, the air outlet 112, and the transition channel 121 enclose and form an exhaust channel 3.

[0030] Preferably, the filter element 4 includes a column 42 and a filter plate 43 distributed on the side wall of the column 42. The air inlet 41 is distributed in the lower part of the column 42, and the filter plate 43 is located above the air inlet 41. The end of the filter plate 43 extends toward the inner wall of the liquid storage chamber 111 and is attached to the inner wall of the liquid storage chamber 111.

[0031] Preferably, there are several filter plates 43, which are distributed along the gas flow direction in the liquid storage chamber 111, and adjacent filter plates 43 are staggered.

[0032] Preferably, the filter plate 43 is inclined along the gas flow direction in the liquid storage chamber 111, and the end of the filter plate 43 is inclined toward the air outlet 112.

[0033] Preferably, the upper inner wall of the liquid storage cavity 111 protrudes downward along the height direction to form the air outlet 112, and the width of the air outlet 112 gradually increases upward along the height direction.

[0034] Preferably, the bottom of the filter element 4 is provided with a fixed platform 44, the end of the column 42 protrudes from the fixed platform 44, the fixed platform 44 is arranged with a smaller top and a larger bottom, and the lower part of the fixed platform 44 has a mating surface 441. The upper part of the fixed platform 44 is inserted into the liquid storage chamber 111 and is plugged in. The lower end of the valve body 1 abuts against the mating surface 441 and is welded to the mating surface 441.

[0035] Specifically, such as Figure 1 , Figure 2As shown, valve body 1 has a vertical surface on one side and an arc-shaped surface on the other side. The vertical surface of valve body 1 has a connector for fixing to motor 10. The connector consists of four elastic locking blocks distributed circumferentially, with clearance between the sidewalls of adjacent blocks. Motor 10 has a fixing hole for engaging with the connector. Valve body 1 is detachably fixed inside motor 10 via the connector and fixing hole. The clearance helps to avoid interference when the connector is inserted into the fixing hole on motor 10, facilitating the assembly and fixing of valve body 1 and motor 10.

[0036] The coolant is distributed in the lower half of the motor 10. The valve body 1 is fixed in the upper half of the motor 10 and is placed vertically. The exhaust port 112 on the exhaust channel 3 is set upward. One end of the air pipe 2 is placed vertically and fixed on the valve body 1. The other end of the air pipe 2 passes through the motor 10 and is installed in the frame of the electric vehicle. Thus, when the gas inside the motor 10 is discharged to the outside, the coolant can be filtered through the valve body 1 and the air pipe 2 to prevent the coolant from overflowing.

[0037] Furthermore, to improve the ease of connecting and fixing the air tube 2 to the valve body 1, such as... Figure 2 , Figure 3 As shown, the upper part of the filtrate chamber 11 has a sleeve surrounding the outside of the air outlet 112. The inner side wall of the sleeve has an annular groove, and the outer side wall of the quick connector 12 has an annular strip. The annular strip is inserted into the annular groove and engaged. At the same time, the width of the annular groove and the annular strip gradually increases upward along the height direction, thereby preventing the air pipe 2 from detaching from the valve body 1 through the quick connector 12.

[0038] The quick connector 12 is cylindrical, and the outer diameter of the upper end of the quick connector 12 is larger than the inner diameter of the sleeve. Therefore, when the quick connector 12 is fixed inside the sleeve, the upper end of the quick connector 12 is pressed against the upper end of the sleeve, thereby realizing the pre-positioning of the air tube 2 on the valve body 1, which facilitates fixing the air tube 2 on the valve body 1.

[0039] Furthermore, to ensure that the valve body 1 can effectively filter the cooling liquid, a filter element 4 is installed inside the valve body 1. The filter element 4 consists of a column 42, several filter plates 43, and a fixed platform 44 located on the column 42. The maximum width of the fixed platform 44 is greater than the inner diameter of the liquid storage chamber 111. The upper part of the fixed platform 44 is inserted into the liquid storage chamber 111 and seals the liquid storage chamber 111. The lower end of the filter chamber 11 abuts against the mating surface 441 on the fixed platform 44 and is welded and fixed.

[0040] In this embodiment of the application, there are two filter plates 43. The filter plates 43 are distributed at intervals along the height direction. The upper end of the lower filter plate 43 extends away from the side of the filtrate chamber 11 with the connector, and the upper end of the upper filter plate 43 extends closer to the side of the filtrate chamber 11 with the connector. The upper ends of the two filter plates 43 are in contact with the inner wall of the liquid storage chamber 111.

[0041] One side opening of the air inlet 41 is located at the lower end of the column 42, and the other side opening of the air inlet 41 is located on the side wall of the column 42, between the fixed platform 44 and the filter plate 43 below.

[0042] The filter plates 43 are multiple and staggered, which can divide the liquid storage chamber 111 into multiple flow channels at multiple angles, thereby extending the distance that the gas needs to travel. During this process, the kinetic energy of the cooling liquid entering the liquid storage chamber 111 is gradually consumed. The cooling liquid that has consumed its kinetic energy also flows back into the motor 10. This achieves the filtration of cooling liquid in the exhaust gas, effectively collects the cooling liquid and prevents the cooling liquid from overflowing, thus improving the safety of the motor 10 during operation.

[0043] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. An exhaust structure of an electric machine comprising a valve body (1) and an electric machine (10), characterized in that: Also include a trachea (2), the valve body (1) is located in the motor (10) and is fixed on the stator inside the motor (10), the valve body (1) is provided with exhaust passage (3), the trachea (2) is connected with valve body (1) and goes out from the motor (10), the trachea (2) is communicated with exhaust passage (3), ambient air respectively at both ends.

2. An electrical machine exhaust structure according to claim 1, wherein: The valve body (1) is located in the upper half of the motor (10), and one end of the exhaust passage (3) is arranged downward.

3. An electrical machine exhaust structure according to claim 1, wherein: The valve body (1) includes a filter tank (11) and a quick connector (12), the filter tank (11) is provided with a liquid storage cavity (111), the filter core (4) is detachably arranged in the liquid storage cavity (111), the filter core (4) is provided with an air inlet (41) communicated with the liquid storage cavity (111) and the outside, the upper end of the filter tank (11) is provided with an air outlet (112) communicated with the liquid storage cavity (111), the quick connector (12) is provided with a transition flow channel (121), the two ends of the quick connector (12) are connected with the trachea (2) and the filter tank (11) respectively, the transition flow channel (121) is communicated with the air outlet (112), the air inlet (41), the liquid storage cavity (111), the air outlet (112) and the transition flow channel (121) are distributed from bottom to top, and the air inlet (41), the liquid storage cavity (111), the air outlet (112) and the transition flow channel (121) form the exhaust passage (3).

4. An electrical machine exhaust structure according to claim 3, wherein: The filter core (4) includes a column body (42) and filter plates (43) distributed on the side wall of the column body (42), the air inlet (41) is distributed in the lower part of the column body (42), the filter plates (43) are located above the air inlet (41), and the end of the filter plate (43) extends to the direction close to the inner wall of the liquid storage cavity (111) and is attached to the inner wall of the liquid storage cavity (111).

5. An electrical machine exhaust structure according to claim 4, wherein: The number of filter plates (43) is several, and the filter plates (43) are distributed along the flow direction of the gas in the liquid storage cavity (111), and the adjacent filter plates (43) are staggered.

6. An electrical machine exhaust structure according to claim 4, wherein: The filter plates (43) are inclined along the gas flow direction in the liquid storage cavity (111), and the end of the filter plate (43) is inclined to the direction close to the air outlet (112).

7. An exhaust structure for an electric machine according to claim 3, characterized by: The upper inner wall of the liquid storage cavity (111) protrudes downward along the height direction to form the air outlet (112), and the width of the air outlet (112) gradually increases upward along the height direction.

8. An electrical machine exhaust structure according to claim 4, wherein: The filter core (4) further includes a fixing table (44), the end of the column body (42) penetrates out of the fixing table (44), the fixing table (44) is arranged in a small size upward and a large size downward, the lower part of the fixing table (44) is provided with a matching surface (441), the upper part of the fixing table (44) is inserted into the liquid storage cavity (111) and is inserted and matched, the lower end of the valve body (1) is tightly contacted with the matching surface (441) and is welded on the matching surface (441).

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