Ventilation valve and electric drive assembly

Abstract

The utility model provides a vent valve and an electric drive assembly. The vent valve comprises a valve body, a sealing piece and an elastic piece. The valve body is provided with an air inlet, a first air outlet and a second air outlet, a first air outlet channel is formed between the air inlet and the first air outlet, and a second air outlet channel is formed between the air inlet and the second air outlet. The elastic piece abuts against the sealing piece in the first direction so that the sealing piece can be kept in a sealed state to block the second air outlet channel. In the sealing state, gas can be discharged through the first gas outlet channel. When the sealing piece moves to the non-sealing state in the second direction opposite to the first direction, the gas can be exhausted through the second gas outlet channel. According to the vent valve, the valve body is provided with the first air outlet channel and the second air outlet channel, the vent valve exhausts air only through the first air outlet channel in the normal working process, when the air pressure in the electric drive assembly is too large, air can also be exhausted through the second air outlet channel, and therefore the purpose of rapidly reducing the air pressure in the electric drive assembly is achieved.

Description

Technical Field

[0001] The present application relates to the field of vent valves, and in particular to a vent valve and an electric drive assembly suitable for an oil-cooled electric drive system. Background Art

[0002] With the growth of the new energy market, the sales volume of electric drive system assemblies is also increasing, and oil-cooled motors are gradually becoming the mainstream choice in the future market due to their excellent efficiency.

[0003] The electric drive assembly equipped with an oil-cooled motor will generate a lot of heat during operation, so a vent valve is needed to balance the internal air pressure. However, the existing vent valve only has one air outlet channel. When the electric drive assembly is overloaded and the internal air pressure rises rapidly, the existing vent valve cannot quickly discharge the gas to reduce the internal air pressure. Utility Model Content

[0004] The purpose of the present application is to provide a vent valve and an electric drive assembly that can quickly reduce the internal air pressure of an electric drive assembly.

[0005] The present application provides a vent valve, comprising: a valve body, a sealing member and an elastic member; the valve body is provided with an air inlet, a first air outlet and a second air outlet, a first air outlet channel is formed between the air inlet and the first air outlet, and a second air outlet channel is formed between the air inlet and the second air outlet; the elastic member presses the sealing member along a first direction so that the sealing member remains in a sealed state to block the second air outlet channel; in the sealed state, gas can be discharged through the first air outlet channel; when the sealing member moves along a second direction opposite to the first direction to a non-sealed state, gas can be discharged through the second air outlet channel.

[0006] Furthermore, it also includes a valve cap fixed to the valve body, one end of the elastic member abuts against the valve cap, and the other end abuts against the sealing member.

[0007] Furthermore, the valve cap includes a top wall and a side wall extending from the top wall; the top end of the valve body is located in the space enclosed by the top wall and the side wall, the side wall is covered on the outside of the second air outlet, and an air outlet gap connected to the second air outlet is provided between the side wall and the valve body.

[0008] Furthermore, the valve body is provided with a step portion; and the side wall is provided with a shoulder portion that abuts against the step portion so that the valve cap is limited to the valve body.

[0009] Furthermore, the valve body includes a main body and a side wall arranged on the outside of the main body; the main body and the side wall form a cavity; the first air outlet channel includes the cavity; the second air outlet is arranged on the main body; and a connecting hole connecting the cavity and the air inlet is provided on the main body.

[0010] Furthermore, it also includes filter cotton; the filter cotton is accommodated in the cavity and is arranged around the outside of the main body.

[0011] Furthermore, it also includes a waterproof breathable component; the waterproof breathable component is located on one side of the filter cotton, and the gas is discharged through the filter cotton and the waterproof breathable component in sequence; the waterproof breathable component is provided with a through hole for the main body to pass through.

[0012] Furthermore, it also includes a cover plate fixed to the side wall; the cover plate is provided with a through hole for the main body to pass through, and the first air outlet is arranged on the side wall.

[0013] Furthermore, it also includes an oil baffle fixed to the valve body; the oil baffle is provided with a labyrinth passage connected to the air inlet, and the gas enters the air inlet through the labyrinth passage.

[0014] The present application also provides an electric drive assembly, comprising the above-mentioned ventilation valve.

[0015] The vent valve provided in the present application is provided with a first air outlet channel and a second air outlet channel on the valve body. When working normally, the vent valve only exhausts air through the first air outlet channel. When the internal air pressure of the vent valve electric drive assembly is too high, the air can also be exhausted through the second air outlet channel, thereby achieving the purpose of quickly reducing the internal air pressure of the electric drive assembly.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0018] Figure 1 It is a schematic diagram of the ventilation valve of the present application.

[0019] Figure 2 yes Figure 1 A cross-sectional view of the vent valve is shown.

[0020] Figure 3 yes Figure 1 Exploded view of the breather valve shown.

[0021] Figure 4 yes Figure 3A cross-sectional view of the vent valve is shown.

[0022] Figure 5 yes Figure 3 A cross-sectional view of the valve body is shown.

[0023] Figure 6 yes Figure 3 A cross-sectional view of the valve bonnet is shown.

[0024] Figure 7 yes Figure 3 A cross-sectional view of the oil baffle is shown.

[0025] Explanation of the reference numerals: 1. valve body; 101. air inlet; 102. first air outlet; 103. second air outlet; 104. first air outlet channel; 105. second air outlet channel; 106. air outlet gap; 11. main body; 111. connecting hole; 12. side wall; 121. forming hole; 13. cavity; 14. step portion; 15. first threaded portion; 2. sealing member; 3. elastic member; 4. valve cap; 41. top wall; 42. side wall; 43. shoulder; 5. filter cotton; 6. waterproof and breathable member; 61. through hole; 7. valve cover; 71. through hole; 8. oil retaining member; 81. labyrinth passage; 82. second threaded portion; 9. screw plug. DETAILED DESCRIPTION

[0026] Next, the embodiments of this specification are described in detail.

[0027] Please refer to Figure 1 to Figure 2 As shown, the present application provides a vent valve, comprising: a valve body 1, a sealing member 2 and an elastic member 3. The valve body 1 is provided with an air inlet 101, a first air outlet 102 and a second air outlet 103. A first air outlet channel 104 is formed between the air inlet 101 and the first air outlet 102, and a second air outlet channel 105 is formed between the air inlet 101 and the second air outlet 103.

[0028] The elastic member 3 presses the sealing member 2 along the first direction so that the sealing member 2 remains in a sealed state, thereby blocking the second gas outlet channel 105. In the sealed state, gas can be discharged through the first gas outlet channel 104.

[0029] When the air pressure inside the vent valve is too high, the gas entering the vent valve will push the seal 2 to move in a second direction opposite to the first direction to a non-sealed state (not shown), and the gas can be discharged through the second outlet channel 105 and the first outlet channel 104 .

[0030] When the first air outlet channel 104 is blocked, the gas entering the vent valve cannot be discharged, which will increase the air pressure in the vent valve. The pressure applied by the gas to the seal 2 is greater than the elastic force applied by the elastic member 3 to the seal 2, causing the seal 2 to move in a second direction opposite to the first direction to a non-sealed state (not shown), and the gas can be discharged through the second air outlet channel 105.

[0031] The vent valve provided in the present application is provided with a first air outlet channel 104 and a second air outlet channel 105 on the valve body 1. When working normally, the vent valve only exhausts air through the first air outlet channel 104; when the internal air pressure of the vent valve is too high, the air can be exhausted through the second air outlet channel 105, thereby achieving the purpose of quickly reducing the internal air pressure of the electric drive assembly.

[0032] Please refer to Figures 1 to 5 As shown, the valve body 1 includes a main body 11 and a side wall 12 arranged on the outside of the main body 11. The main body 11 and the side wall 12 form a cavity 13. The first air outlet channel 104 includes the cavity 13. The second air outlet 103 is arranged on the main body 11. The first air outlet 102 is arranged on the side wall 12. The main body 11 is provided with a connecting hole 111 connecting the cavity 13 and the air inlet 101. In a sealed state, the gas enters from the air inlet 101 on the main body 11, enters the first air outlet channel 104 through the connecting hole 111, and is discharged from the side wall 12 through the first air outlet 102. In an unsealed state, the gas will also enter the second air outlet channel 105 on the main body 11 and be discharged from the main body 11 through the second air outlet 103.

[0033] The number of the first air outlet 102 can be only one or multiple, and the present application does not impose any limitation on this.

[0034] In one embodiment, if Figure 1 As shown, the side wall 12 is a hexahedral structure, a first air outlet 102 is arranged on each surface of the side wall 12 , and the side wall 12 is arranged around the main body 11 .

[0035] The side wall 12 may also be a circular ring disposed around the main body 11 , and this application does not impose any limitation on this.

[0036] The side wall 12 may be integrally formed with the main body 11 , or the side wall 12 and the main body 11 may be connected by welding or the like, and this application does not impose any limitation on this.

[0037] The vent valve provided in the present application further includes filter cotton 5. The filter cotton 5 is accommodated in the cavity 13 and is arranged around the outside of the main body 11. The filter cotton 5 can absorb impurities such as oil and gas in the gas entering from the air inlet 101, thereby achieving the effect of purifying the exhaust gas.

[0038] The filter cotton 5 described in the present application may be glass fiber filter cotton, synthetic fiber made of synthetic fibers such as polyester and polypropylene, activated carbon, sponge filter cotton, or non-woven fabric, etc., and the present application does not impose any restrictions on this.

[0039] The vent valve provided in the present application further includes a waterproof breathable member 6. The waterproof breathable member 6 is located on one side of the filter cotton 5, and the gas is discharged sequentially through the filter cotton 5 and the waterproof breathable member 6. The waterproof breathable member 6 is provided with a through hole 61 for the main body 11 to pass through.

[0040] The waterproof breathable member 6 can pass gas and block water vapor, thereby balancing the air pressure inside and outside the vent valve. The filter cotton 5 can absorb oil and gas in the gas to prevent the oil and gas from being adsorbed on the waterproof breathable member 6, thereby causing the waterproof breathable member 6 to fail. Preferably, the waterproof breathable member 6 of the present application can be a waterproof breathable membrane made of expanded polytetrafluoroethylene material, and the pore size of the waterproof breathable member 6 is greater than or equal to 0.1 microns and less than or equal to 10 microns.

[0041] When the vent valve of the present application is used in an oil-cooled electric drive system, since the oil-cooled electric drive system will generate oil and gas aerosols, the generated aerosols will seriously reduce the service life of the waterproof and breathable component 6. The vent valve of the present application achieves the function of smooth ventilation through the setting of the first air outlet channel 104 and the second air outlet channel 105, thereby extending the service life of the vent valve.

[0042] The communicating hole 111 on the side wall 12 will generate a corresponding forming hole 121 on the side wall 12 during the process of forming. The vent valve also includes a screw plug 9, which is used to block the forming hole 121 to prevent gas from being discharged from the forming hole 121 without passing through the filter cotton 5 and the waterproof breathable member 6.

[0043] The vent valve provided in the present application further includes a cover plate 7 fixed to the side wall 12. The cover plate 7 is provided with a through hole 71 for the main body 11 to pass through. The cover plate 7 is located outside the waterproof breathable member 6, and the cover plate 7 can protect the waterproof breathable member 6. Along the first direction, the first air outlet 102 is located between the cover plate 7 and the waterproof breathable member 6.

[0044] The vent valve provided in the present application further includes a valve cap 4 fixed to the valve body 1. One end of the elastic member 3 abuts against the valve cap 4, and the other end abuts against the sealing member 2. In the sealed state, the sealing member 2 seals the second air outlet channel 105, and the end of the elastic member 3 abutting against the sealing member 2 applies elastic force to the sealing member 2 along the first direction, thereby improving the sealing stability of the sealing member 2.

[0045] When the air pressure inside the vent valve is too high, the gas pushes the seal 2 to move in the second direction to a non-sealed state, at which time the elastic member 3 contracts, and the gas can be discharged from the second air outlet channel 105 to reduce the air pressure inside the vent valve. When the air pressure drops to a critical point, that is, the push force applied by the gas to the seal 2 is less than the elastic force applied by the elastic member 3 to the seal 2 at this time, the elastic member 3 rebounds, driving the seal 2 back to the original sealed state, at which time the second air outlet channel 105 is sealed, and the gas is discharged from the first air outlet channel 104, so that the vent valve can still work normally after the pressure is released.

[0046] The sealing member 2 described in the present application may be a sealing ring (not shown) or a Figure 2 The valve ball is shown, but this application is not limited to this.

[0047] The elastic member 3 described in the present application may be a spring, or other objects capable of elastic deformation such as rubber, plastic, etc., and the present application does not impose any limitation on this.

[0048] The valve cap 4 can be fixed to the top of the valve body 1 by welding, bonding, etc., and this application does not impose any limitation on this.

[0049] Please refer to Figure 2 , Figure 4 and Figure 6 As shown, the valve cap 4 includes a top wall 41 and a side wall 42 extending from the top wall 41. The top of the valve body 1 is located in the space surrounded by the top wall 41 and the side wall 42, the side wall 42 covers the outside of the second air outlet 103, and an air outlet gap 106 communicating with the second air outlet 103 is provided between the side wall 42 and the valve body 1.

[0050] By setting a valve cap 4 at the top of the valve body 1, the second air outlet 103 is covered by the valve cap 4, and the gas is discharged from the second air outlet 103 through the air outlet gap 106 between the second air outlet 103 and the side wall 42, which can protect the sealing member 2 and the elastic member 3 inside the valve body 1 and prevent water vapor, dust, etc. from entering the interior of the valve body 1 through the second air outlet 103, thereby improving the service life of the vent valve.

[0051] The type, specification, pressure and other information of the vent valve can be set on the top wall 41 or the side wall 42 of the valve cap 4 of the present application, which helps users to identify and distinguish different types of valves and facilitates maintenance and operation.

[0052] The second air outlet 103 of the present application can be provided with only one or more second air outlets on the valve body 1, and the present application does not limit this. The second air outlet 103 can be provided on the side of the main body 11 or on the top of the main body 11, and the present application does not limit this.

[0053] The valve body 1 is provided with a step portion 14. The side wall 42 is provided with a shoulder portion 43 that abuts against the step portion 14 so that the valve cap 4 is limited to the valve body 1 to prevent the valve cap 4 from being separated from the top of the valve body 1 under the action of external force. In the non-sealed state, the valve cap 4 can rotate around the valve body 1 when subjected to the pressure of the gas, thereby increasing the width of the air outlet gap 106 and improving the pressure relief capacity of the vent valve. The shoulder portion 43 described in the present application can be formed by applying force to the side wall 42 so that part of the side wall 42 is concave.

[0054] Please refer to Figure 2 , Figure 4 and Figure 7 As shown, the vent valve provided in the present application further includes an oil retaining member 8 fixed to the valve body 1. The oil retaining member 8 is provided with a labyrinth channel 81 connected to the air inlet 101, and the gas enters the air inlet 101 via the labyrinth channel 81. When the gas flows through the labyrinth channel 81, the flow rate will suddenly decrease, causing the liquid particles (such as oil droplets, etc.) in the gas to continue to move forward due to inertia and not to easily follow the flow of the gas. This speed difference will cause the liquid particles to settle on the inner wall of the labyrinth channel 81, thereby preventing them from entering the vent valve.

[0055] A first threaded portion 15 is disposed on the inner wall of the bottom end of the main body 11 , and a second threaded portion 82 cooperating with the first threaded portion 15 is disposed on the oil retaining member 8 , thereby fixing the oil retaining member 8 in the main body 11 and preventing the oil retaining member 8 from falling off the valve body 1 .

[0056] The oil retaining member 8 may also be fixed in the main body 11 by welding to the main body 11 or bonding to the inner wall of the main body 11, etc., and the present application does not impose any limitation on this.

[0057] The present application also provides an electric drive assembly, including the above-mentioned vent valve and an oil-cooled motor. The vent valve is connected to the exhaust port of the oil-cooled motor. When the oil-cooled motor runs and generates a lot of heat, it can be discharged through the vent valve to achieve the effect of balancing the air pressure.

[0058] Preferably, the valve body 1, the sealing member 2 and the elastic member 3 are made of anti-corrosion materials, thereby preventing oil droplets in the gas discharged from the oil-cooled motor from corroding the vent valve, thereby increasing the service life of the vent valve.

[0059] The valve body 1, the sealing member 2 and the elastic member 3 may be made of stainless steel, aluminum alloy, galvanized steel, etc., and this application does not impose any restrictions on this.

[0060] The electric drive assembly described in this application may also use other motors such as air-cooled motors, and this application does not impose any restrictions on this.

Claims

1. A vent valve, characterized in that: include: A valve body, a sealing member and an elastic member; the valve body is provided with an air inlet, a first air outlet and a second air outlet, a first air outlet channel is formed between the air inlet and the first air outlet, and a second air outlet channel is formed between the air inlet and the second air outlet; the elastic member presses the sealing member along a first direction so that the sealing member remains in a sealed state to block the second air outlet channel; in the sealed state, gas can be discharged through the first air outlet channel; when the sealing member moves along a second direction opposite to the first direction to a non-sealed state, gas can be discharged through the second air outlet channel.

2. The vent valve according to claim 1, characterized in that It also includes a valve cap fixed to the valve body, one end of the elastic member abuts against the valve cap, and the other end abuts against the sealing member.

3. The vent valve according to claim 2, characterized in that: The valve cap includes a top wall and a side wall extending from the top wall; the top end of the valve body is located in the space enclosed by the top wall and the side wall, the side wall covers the outer side of the second air outlet, and an air outlet gap connected to the second air outlet is provided between the side wall and the valve body.

4. The vent valve according to claim 3, characterized in that: The valve body is provided with a step portion; the side wall is provided with a shoulder portion that abuts against the step portion so that the valve cap is limited to the valve body.

5. The vent valve according to claim 1, characterized in that: The valve body includes a main body and a side wall arranged on the outside of the main body; the main body and the side wall form a cavity; the first air outlet channel includes the cavity; the second air outlet is arranged on the main body; and a connecting hole connecting the cavity and the air inlet is provided on the main body.

6. The vent valve according to claim 5, characterized in that It also includes filter cotton; the filter cotton is accommodated in the cavity and is arranged around the outside of the main body.

7. The vent valve according to claim 6, characterized in that It also includes a waterproof and breathable component; the waterproof and breathable component is located on one side of the filter cotton, and the gas is discharged through the filter cotton and the waterproof and breathable component in sequence; the waterproof and breathable component is provided with a through hole for the main body to pass through.

8. The vent valve according to claim 5, characterized in that It also includes a cover plate fixed to the side wall; the cover plate is provided with a through hole for the main body to pass through, and the first air outlet is arranged on the side wall.

9. The vent valve according to claim 1, characterized in that: It also includes an oil baffle fixed to the valve body; the oil baffle is provided with a labyrinth passage connected to the air inlet, and the gas enters the air inlet via the labyrinth passage.

10. An electric drive assembly, characterized in that: Comprising the vent valve according to any one of claims 1-9.

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