A high-temperature three-way valve for a hydrogen fuel system

Abstract

The present invention relates to the field of high-temperature three-way valves for automobiles, and discloses a high-temperature three-way valve for a hydrogen fuel system, which includes a high-temperature valve body. A valve stem is rotatably connected inside the high-temperature valve body. A main path valve plate is arranged on the outer side of the valve stem. A bypass outlet is arranged on the outer side of the high-temperature valve body. An air inlet and a main path outlet are respectively arranged on both sides of the outer side of the high-temperature valve body. By providing a stainless steel base, a cooling water pipe, a U-shaped cooling water tank and a graphite bushing, after high-temperature air enters the high-temperature valve, it can quickly and efficiently dissipate heat from the motor housing and the electrical components inside it and reduce the temperature to a suitable working temperature, thereby avoiding the situation where the electrical components and the transmission system cannot work due to excessive temperature, and greatly improving the reliability and service life of the present high-temperature three-way valve.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive high-temperature three-way valves, and particularly to a high-temperature three-way valve for a hydrogen fuel system. Background Art

[0002] Automobiles are the most representative field for the application of hydrogen fuel cells. Hydrogen fuel cell vehicles have many advantages such as high efficiency, no pollution, short charging time, and long-range driving ability, and are expected to become the mainstream of the future automotive industry. Currently, many automobile brands in the world have launched hydrogen fuel cell vehicles, and in the automotive industry, hydrogen fuel cell vehicles are gradually replacing fuel vehicles as the mainstream.

[0003] For small-power hydrogen fuel vehicles, the three-way valve is installed behind the intercooler, but for large-power hydrogen fuel vehicles, the three-way valve is installed in front of the intercooler. In this way, the high-temperature gas compressed by the compressor directly enters the three-way valve, so it is called a high-temperature valve. As an important component of the automotive engine air system, the high-temperature valve adjusts the opening of the valve according to the air volume required by the fuel cell stack to provide an appropriate amount of air for the fuel cell stack.

[0004] Currently, there is a common technical problem in the operation of current automotive high-temperature valves, that is, since the temperature of the air compressed by the compressor can reach a certain degree, it is difficult for the motors, electrical components, and transmission components in the high-temperature valve to work at this temperature, which will in turn lead to a higher failure rate of the high-temperature valve and the service life of the high-temperature valve cannot be guaranteed. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a high-temperature three-way valve for a hydrogen fuel system.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A high-temperature three-way valve for a hydrogen fuel system, comprising a high-temperature valve body, wherein a valve rod is rotatably connected inside the high-temperature valve body, a main path valve plate is arranged on the outer side of the valve rod, a bypass outlet is arranged on the outer side of the high-temperature valve body, an air inlet and a main path outlet are respectively arranged on both sides of the outer side of the high-temperature valve body. The high-temperature three-way valve for the hydrogen fuel system further comprises: a stainless-steel base connected to the outer side of the high-temperature valve body, and a through hole is formed on the surface of the stainless-steel base and is communicated with the inside of the high-temperature valve body, and the valve rod is arranged inside the through hole; two cooling water pipes are connected to the outer side of the stainless-steel base, and a U-shaped cooling water tank is formed inside the stainless-steel base, and the two cooling water pipes are respectively communicated with both ends of the U-shaped cooling water tank; a motor housing is connected to the outer side of the stainless-steel base, a driving motor is installed inside the motor housing, a motor gear is installed at the output end of the driving motor, an intermediate gear is meshed with the outer side of the motor gear, a sector gear is meshed with the outer side of the intermediate gear, and the sector gear is sleeved on the outer side of the valve rod; and a torsion spring is installed inside the motor housing, and one end of the torsion spring far away from the motor housing is connected to the outer side of the valve rod.

[0008] Preferably, a graphite bushing is sleeved on one side of the outer side of the valve rod, and the outer side of the graphite bushing is in contact with the stainless-steel base.

[0009] Preferably, a main path seal valve sleeve is arranged at the edge position of the lower side of the stainless-steel base, and the main path seal valve sleeve is a component made of sulfide fluororubber, and a polytetrafluoroethylene layer is arranged at a position on the outer side of the main path valve plate close to the main path seal valve sleeve.

[0010] Preferably, a magnetic steel is installed at one end of the valve rod.

[0011] Preferably, a precision bearing is installed inside the motor housing, and the intermediate gear is installed on the precision bearing.

[0012] Preferably, the sector gear is a component made of glass fiber, the valve rod is a component made of stainless steel, and the sector gear and the valve rod are of an integrally injection-molded structure.

[0013] Preferably, the high-temperature three-way valve for the hydrogen fuel system further comprises: a support ring connected inside the bypass outlet, and rotating shafts are installed on both sides inside the support ring, and a gas distribution pipe is rotatably connected to the outer sides of the two rotating shafts; a telescopic member is installed on the outer side of the bypass outlet; and a pulling slide rail is arranged on the surface of the gas distribution pipe, and a pulling slider is slidably connected inside the pulling slide rail, and the pulling slider is hinged to the telescopic end of the telescopic member.

[0014] Preferably, a protective shell is arranged on the outer side of the bypass outlet, the telescopic member is arranged inside the protective shell, a through hole is formed on the outer side of the protective shell, and the telescopic end of the telescopic member is arranged inside the through hole.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. A high-temperature three-way valve for a hydrogen fuel system proposed by the present invention, by setting a stainless steel base, a cooling water pipe, a U-shaped cooling water tank and a graphite bushing, after high-temperature air enters the high-temperature valve, it can quickly and efficiently dissipate heat from the motor housing and the electrical components inside it and reduce the temperature to a suitable working temperature, thereby avoiding the situation where the electrical components and the transmission system cannot work due to excessive temperature, and greatly improving the reliability and service life of the present high-temperature three-way valve.

[0017] 2. A high-temperature three-way valve for a hydrogen fuel system proposed by the present invention, by setting a magnet and installing a chip on the PLC board for controlling the high-temperature three-way valve, can accurately control the air flow rate inside the high-temperature valve body, so as to adjust the opening degrees of the main path and the bypass according to the actual air demand of the vehicle fuel cell stack, thereby improving the applicable range of the present high-temperature three-way valve.

[0018] 3. A high-temperature three-way valve for a hydrogen fuel system proposed by the present invention, by setting a gas distribution pipe, a telescopic member, a pulling slider, a pulling slide rail, a rotating shaft and a support ring, can automatically expand the blowing coverage range of the high-temperature air and make the high-temperature air fully blow on the throttle valve and other components that need to be heated in the vehicle, thereby improving the functionality of the present high-temperature three-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention;

[0020] Figure 2 is a partial side sectional view of a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of the valve stem, sector gear and magnet of a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention;

[0022] Figure 4 is a partial front sectional view of a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention;

[0023] Figure 5 is a partial top structural diagram of the stainless steel base, U-shaped cooling water tank and high-temperature valve body of a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention;

[0024] Figure 6 is a high-temperature three-way valve for a hydrogen fuel system proposed by an embodiment of the present invention Figure 4 partial enlarged view;

[0025] Figure 7 Schematic structural diagram of the main - path sealing valve sleeve of a high - temperature three - way valve for a hydrogen fuel system proposed in an embodiment of the present invention;

[0026] Figure 8 Partial cross - sectional view of a stainless - steel base and the main - path sealing valve sleeve of a high - temperature three - way valve for a hydrogen fuel system proposed in an embodiment of the present invention;

[0027] Figure 9 Partial front cross - sectional view of the bypass outlet of a high - temperature three - way valve for a hydrogen fuel system proposed in an embodiment of the present invention.

[0028] In the figure: 1. High - temperature valve body; 2. Bypass outlet; 3. Air inlet; 4. Stainless - steel base; 5. Motor housing; 6. Cooling water pipe; 7. Main - path outlet; 8. U - shaped cooling water tank; 9. Valve stem; 10. Graphite bushing; 11. Main - path sealing valve sleeve; 12. Main - path valve plate; 13. Magnet; 14. Motor gear; 15. Intermediate gear; 16. Torsion spring; 17. Sector gear; 18. Driving motor; 19. Dividing air pipe; 20. Pulling slide rail; 21. Pulling slider; 22. Protective shell; 23. Telescopic member; 24. Support ring; 25. Rotating shaft. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Refer to Figures 1 to 8 , a high - temperature three - way valve for a hydrogen fuel system includes a high - temperature valve body 1, and a valve stem 9 is rotatably connected inside the high - temperature valve body 1. A main - path valve plate 12 is arranged on the outer side of the valve stem 9. A bypass outlet 2 is arranged on the outer side of the high - temperature valve body 1. An air inlet 3 and a main - path outlet 7 are respectively arranged on both sides of the outer side of the high - temperature valve body 1. The air inlet 3 is connected to an air compressor through a connecting flange, the main - path outlet 7 is connected to an automotive intercooler, the bypass outlet 2 is connected to the tail exhaust, and a bypass valve plate is further arranged at the bottom of the outer side of the valve stem 9, and this bypass valve plate is used to control the opening and closing state inside the bypass outlet 2;

[0031] The high - temperature valve in this application is placed in front of the automotive compressor. By setting it in front of the compressor, when it is cold and freezing, the high - temperature gas compressed by the compressor can be sent into the bypass outlet 2 on the high - temperature valve to purge the automotive throttle, so as to achieve the purpose of rapid cold start.

[0032] The high - temperature three - way valve for a hydrogen fuel system in this application further includes:

[0033] The stainless - steel base 4 is connected to the outside of the high - temperature valve body 1. A through - hole is provided on the surface of the stainless - steel base 4, and the through - hole is in communication with the inside of the high - temperature valve body 1. The valve stem 9 is arranged inside the through - hole. At the edge position on the lower side of the stainless - steel base 4, a main - path sealing valve sleeve 11 is provided, and the main - path sealing valve sleeve 11 is a component made of sulfurized fluororubber. A polytetrafluoroethylene layer is provided at a position near the main - path sealing valve sleeve 11 on the outside of the main - path valve plate 12, which can greatly improve the sealing performance between the main - path sealing valve sleeve 11 and the main - path valve plate 12;

[0034] Two cooling water pipes 6 are connected to the outside of the stainless - steel base 4. A U - shaped cooling water tank 8 is provided inside the stainless - steel base 4. The two cooling water pipes 6 are respectively in communication with both ends of the U - shaped cooling water tank 8. The external coolant is injected into the inside of the U - shaped cooling water tank 8 through the cooling water pipes 6, and the coolant continuously flows inside the U - shaped cooling water tank 8;

[0035] The motor housing 5 is connected to the outside of the stainless - steel base 4. A driving motor 18 is installed inside the motor housing 5. An output end of the driving motor 18 is provided with a motor gear 14. A middle gear 15 is meshed and connected to the outside of the motor gear 14. A sector gear 17 is meshed and connected to the outside of the middle gear 15, and the sector gear 17 is sleeved on the outside of the valve stem 9. A precision bearing is installed inside the motor housing 5, and the middle gear 15 is installed on the precision bearing; and

[0036] A torsion spring 16 is installed inside the motor housing 5, and one end of the torsion spring 16 away from the motor housing 5 is connected to the outside of the valve stem 9;

[0037] A graphite bushing 10 is sleeved on one side of the outside of the valve stem 9, and the outside of the graphite bushing 10 is in contact with the stainless - steel base 4.

[0038] In the above - mentioned technical solution, in the initial state, the main - path valve plate 12 and the main - path sealing valve sleeve 11 are in close contact, the inside of the high - temperature valve body 1 is in a closed state, and the bypass outlet 2 is in a fully - open state. When the automotive fuel cell stack needs an appropriate amount of air, the driving motor 18 is started. The output end of the driving motor 18 drives the motor gear 14 to rotate, and the motor gear 14 drives the middle gear 15 to rotate through the precision bearing inside the motor housing 5. The middle gear 15 drives the sector gear 17 meshed with itself to rotate. Then, the sector gear 17 drives the valve stem 9 to rotate, so that the main - path valve plate 12 on the valve stem 9 is separated from the main - path sealing valve sleeve 11 to open the main path and close the bypass;

[0039] When the driving motor 18 is powered off, the torsion spring 16 connected to the valve stem 9 will return to its original position and drive the valve stem 9 to rotate, so that the valve stem 9 and the main - path valve plate 12 on the valve stem 9 return to the initial state, the main path is closed, and the bypass is opened.

[0040] After the high-temperature gas enters the interior of the high-temperature valve body 1, both the entire high-temperature valve body 1 and the valve stem 9 will be heated by the high-temperature gas. Since the motor housing 5 and the electrical components inside the motor housing 5 are both arranged close to the high-temperature valve body 1 and the valve stem 9, the motor housing 5 will also be in a high-temperature state passively, which is very unfavorable for the normal operation of the driving motor 18 and other electrical components. To solve the above technical problems, in this application, after the high-temperature gas enters the interior of the high-temperature valve body 1, the coolant can be sent into the interior of the cooling water pipe 6, and the coolant is made to continuously circulate in the U-shaped cooling water tank 8 opened inside the stainless steel base 4. Furthermore, the coolant can quickly take away the heat of the stainless steel base 4 and the motor housing 5 in contact with the stainless steel base 4 until the temperature of the motor housing 5 and its interior drops below 100 degrees Celsius. And by sleeving a graphite bushing 10 on the top of the outer side of the valve stem 9, the heat can be conducted away by the graphite bushing 10 before being transferred to the top of the valve stem 9. And since the graphite bushing 10 is in contact with the stainless steel base 4, the heat of the graphite bushing 10 can be quickly taken away, thereby avoiding the situation that after the high-temperature air transfers the heat to the valve stem 9, the valve stem 9 continues to transfer the heat to the sector gear 17 and other transmission components. Through the above technical solutions, after the high-temperature air enters the high-temperature valve, it can quickly and efficiently dissipate heat and cool down the motor housing 5 and the electrical components inside it to a suitable working temperature, thereby avoiding the situation that the electrical components and the transmission system cannot work due to excessive temperature, and greatly improving the use reliability and service life of this high-temperature three-way valve.

[0041] Based on the above embodiment, a magnetic steel 13 is installed at one end of the valve stem 9, and a chip is installed on the PLC board for controlling the high-temperature three-way valve. This chip is used to detect the opening degree of the main path valve plate 12 to achieve precise control of the air flow rate inside the high-temperature valve body 1, so as to adjust the opening degrees of the main path and the bypass according to the actual air demand of the automotive fuel cell stack, thereby improving the applicable range of this high-temperature three-way valve.

[0042] Based on the above embodiment, the sector gear 17 is a component made of PA66 + 30% glass fiber material, and the valve stem 9 is a component made of stainless steel material. The sector gear 17 and the valve stem 9 are integrally injection-molded, so that the sector gear 17 has good heat resistance.

[0043] Referring to Figure 9 , based on the research and expansion of the above technical solutions, the high-temperature three-way valve for the hydrogen fuel system further includes:

[0044] A support ring 24, connected inside the bypass outlet 2, and two rotating shafts 25 are installed on both sides inside the support ring 24. A gas distribution pipe 19 is rotatably connected to the outer sides of the two rotating shafts 25;

[0045] The telescopic member 23 is installed outside the bypass outlet 2, and the telescopic member 23 is a high-temperature-resistant electric telescopic rod; and

[0046] The pulling slide rail 20 is arranged on the surface of the branch air pipe 19, and a pulling slider 21 is slidably connected inside the pulling slide rail 20, and the pulling slider 21 is hinged to the telescopic end of the telescopic member 23. Preferably, the number of the branch air pipes 19 is set to two, and the corresponding telescopic members 23, pulling sliders 21, pulling slide rails 20 and support rings 24 are also two.

[0047] In the above technical solution, when the main road is closed and the bypass is opened, the high-temperature air enters the inside of the bypass outlet 2 and is mainly blown on the vehicle throttle through the bypass outlet 2. However, since the opening direction of the bypass outlet 2 is fixed and its opening size is limited, it is difficult to fully blow the high-temperature air on the throttle and other vehicle components that need to be heated. In this application, when it is necessary to expand the blowing coverage range of the high-temperature air, the telescopic member 23 can be opened. The telescopic end of the telescopic member 23 drives the pulling slider 21 to slide inside the pulling slide rail 20, so that the pulling slide rail 20 drives the branch air pipe 19 to rotate inside the support ring 24 through the rotating shaft 25, thereby adjusting the opening direction of the branch air pipe 19. Thus, after the high-temperature air enters the bypass outlet 2, part of the high-temperature air will also enter the inside of the branch air pipe 19 and be blown at the designated position under the guidance of the branch air pipe 19, thereby improving the functionality of this high-temperature three-way valve.

[0048] As a preferred embodiment of the present invention, a protective shell 22 is arranged outside the bypass outlet 2, and the telescopic member 23 is arranged inside the protective shell 22. Through holes are opened on the outer side of the protective shell 22, and the telescopic end of the telescopic member 23 is arranged inside the through holes, and the protective shell 22 is a member made of heat-insulating material, which can avoid the telescopic member 23 being damaged due to high-temperature erosion.

[0049] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A high-temperature three-way valve for a hydrogen fuel system, comprising a high-temperature valve body (1), and a valve rod (9) is rotatably connected inside the high-temperature valve body (1). A main path valve plate (12) is arranged on the outer side of the valve rod (9). A bypass outlet (2) is arranged on the outer side of the high-temperature valve body (1). An air inlet (3) and a main path outlet (7) are respectively arranged on both sides of the outer side of the high-temperature valve body (1), characterized in that, The high-temperature three-way valve for the hydrogen fuel system further comprises: A stainless-steel base (4), connected to the outside of the high-temperature valve body (1), and a through-hole is provided on the surface of the stainless-steel base (4), and the through-hole communicates with the inside of the high-temperature valve body (1), and the valve stem (9) is arranged inside the through-hole; Two cooling water pipes (6), connected to the outside of the stainless-steel base (4), and a U-shaped cooling water tank (8) is provided inside the stainless-steel base (4), and the two cooling water pipes (6) are respectively communicated with both ends of the U-shaped cooling water tank (8); A motor housing (5), connected to the outside of the stainless-steel base (4), and a driving motor (18) is installed inside the motor housing (5), an output end of the driving motor (18) is provided with a motor gear (14), an intermediate gear (15) is meshed and connected to the outside of the motor gear (14), a sector gear (17) is meshed and connected to the outside of the intermediate gear (15), and the sector gear (17) is sleeved on the outside of the valve stem (9); and A torsion spring (16), installed inside the motor housing (5), and one end of the torsion spring (16) away from the motor housing (5) is connected to the outside of the valve stem (9); The sector gear (17) is a component made of fiberglass material, and the valve stem (9) is a component made of stainless-steel material, and the sector gear (17) and the valve stem (9) are an integrally injection-molded structure; The high-temperature three-way valve for the hydrogen fuel system further comprises: A support ring (24), connected to the inside of the bypass outlet (2), and a rotating shaft (25) is installed on both sides inside the support ring (24), and a gas distribution pipe (19) is rotatably connected to the outside of the two rotating shafts (25); A telescopic member (23), installed on the outside of the bypass outlet (2); A pulling slide rail (20), arranged on the surface of the gas distribution pipe (19), and a pulling slider (21) is slidably connected to the inside of the pulling slide rail (20), and the pulling slider (21) is hinged to the telescopic end of the telescopic member (23); A protective shell (22) is arranged on the outside of the bypass outlet (2), and the telescopic member (23) is arranged inside the protective shell (22), a through-hole is provided on the outside of the protective shell (22), and the telescopic end of the telescopic member (23) is arranged inside the through-hole.

2. The high-temperature three-way valve for a hydrogen fuel system according to claim 1, wherein A graphite bushing (10) is sleeved on one side of the outside of the valve stem (9), and the outside of the graphite bushing (10) is in contact with the stainless-steel base (4).

3. The high-temperature three-way valve for a hydrogen fuel system according to claim 1, characterized in that, A main path sealing valve sleeve (11) is arranged at the edge position on the lower side of the stainless-steel base (4), and the main path sealing valve sleeve (11) is a component made of sulfurized fluororubber material, and a polytetrafluoroethylene layer is arranged at a position on the outside of the main path valve plate (12) close to the main path sealing valve sleeve (11).

4. A high-temperature three-way valve for a hydrogen fuel system according to claim 1, characterized in that, A magnet (13) is installed at one end of the valve stem (9).

5. A high-temperature three-way valve for a hydrogen fuel system according to claim 1, characterized in that, A precision bearing is installed inside the motor housing (5), and the intermediate gear (15) is installed on the precision bearing.

Images