An intelligent control electronic throttle valve for a hydrogen fuel cell

Abstract

The present invention provides an intelligent control electronic throttle valve for a hydrogen fuel cell, which relates to the technical field of hydrogen fuel cells and includes an aluminum housing and an intelligent control system. A plastic cover is snap-connected to the side wall of the aluminum housing, and an electrical connector is fixedly connected to the outer wall of the plastic cover. A motor is fixedly connected to the outer wall of the aluminum housing, and an output end of the motor is fixedly connected to a driving gear. The driving gear is located inside the aluminum housing. A double-layer gear is rotatably connected to the inner wall of the aluminum housing, and a large gear of the double-layer gear meshes with a tooth surface of the driving gear. A ball bearing is connected to the aluminum housing by interference fit, and a valve shaft is connected to the inner wall of the ball bearing by interference fit. In the present invention, through the cooperation of various components, the sealing between the valve plate and the valve seat is made tight, so as to prevent the occurrence of the situation of hydrogen-air cross-section caused by medium leakage as much as possible, thereby improving the practicability of the electronic throttle valve and prolonging the service life of the hydrogen fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cells, and particularly to an intelligent control electronic throttle valve for a hydrogen fuel cell. Background Art

[0002] A hydrogen fuel cell system is a device that generates electricity through an electrochemical reaction between hydrogen and oxygen. The air supply subsystem is sensitive to the pressure, flow rate, and humidity of the incoming air. Therefore, an actuator for adjusting the back pressure, flow rate, and humidity is required. The throttle valve can play different roles when arranged at different positions in the system. For example, when arranged in the tail exhaust section as a back pressure valve, it can adjust the flow rate and pressure of the incoming air. When arranged at the front end of the fuel cell stack inlet, it can adjust the humidity of the incoming air.

[0003] The application environments of different arrangement positions in the hydrogen fuel cell system are different. For example, there is humid air at the front end of the fuel cell stack, while at the back end of the fuel cell stack, there are more complex components, such as nitrogen, oxygen, high-temperature water vapor, and acidic liquid water. Therefore, higher requirements are put forward for the corrosion resistance of the throttle valve.

[0004] From the perspective of different usage positions, the throttle valve can play different roles, mainly including adjusting the flow rate, adjusting the back pressure, sealing the pipeline, etc. To meet the requirements of different position arrangements, its flow resistance characteristic is also an important evaluation index. A lower flow resistance makes it easier to match the performance requirements.

[0005] In the prior art, the valve plate of the valve plate type electronic throttle valve is often a centered or single eccentric structure, which is likely to cause the valve plate to be unable to be completely sealed, resulting in the problem of medium leakage due to poor sealing. As a result, there is always residual oxygen in the air pipeline after the hydrogen fuel cell system shuts down, thus generating a hydrogen-air interface, which affects the durability of the hydrogen fuel cell system. In addition, the existing products do not have the characteristics of intelligent control, and the system controller does not have enough ports to meet the product control. Summary of the Invention

[0006] The purpose of the present invention is to solve the disadvantages that in the prior art, the valve plate of the valve plate type electronic throttle valve is often a centered or single eccentric structure, which is likely to cause the valve plate to be unable to be completely sealed. In addition, the existing products do not have the characteristics of intelligent control, and the system controller does not have enough ports to meet the product control. Therefore, an intelligent control electronic throttle valve for a hydrogen fuel cell is proposed.

[0007] To achieve the above object, the present invention adopts the following technical solutions: An intelligent control electronic throttle valve for a hydrogen fuel cell, comprising an aluminum housing and an intelligent control system. A plastic cover is snap-connected to the side wall of the aluminum housing. An electrical connector is fixedly connected to the outer wall of the plastic cover. A motor is fixedly connected to the outer wall of the aluminum housing. The output end of the motor is fixedly connected to a driving gear, and the driving gear is located inside the aluminum housing. A double-layer gear is rotatably connected to the inner wall of the aluminum housing. The large gear of the double-layer gear meshes with the tooth surface of the driving gear. A ball bearing is connected to the aluminum housing by interference fit. The inner wall of the ball bearing is connected to a valve shaft by interference fit. A needle bearing is connected to the arc surface of the valve shaft by interference fit. The needle bearing is connected to the aluminum housing by interference fit. A sealing ring is fixedly connected to the end face of the needle bearing. The sealing ring is made of rubber. A sector gear is fixedly connected to one end of the valve shaft. The small gear of the double-layer gear meshes with the tooth surface of the sector gear. A flow channel is opened in the aluminum housing. A valve plate is fixedly connected to the arc surface of the valve shaft away from the sector gear. The valve plate is located in the upper flow channel of the aluminum housing. A valve seat is fixedly connected to the inner wall of the upper flow channel of the aluminum housing. A driver is fixedly connected to the outer wall of the aluminum housing. The driver is electrically connected to the motor. The valve plate and the valve shaft are processed by a welding process. The sector gear and the valve shaft are processed by a welding process. The axis of the sector gear is coaxial with the axis of the valve shaft.

[0008] The effects achieved by the above components are as follows: Through the cooperation of each component, the sealing between the valve plate and the valve seat is made tight, thereby minimizing the occurrence of hydrogen-air cross-section due to medium leakage, and further improving the practicality of the electronic throttle valve and extending the service life of the hydrogen fuel cell.

[0009] At the same time: The intelligent control module of the product can conveniently communicate with the fuel cell controller to achieve intelligent control, thereby reducing the difficulty of use for customers and improving the reliability of the product.

[0010] Preferably, the valve shaft and the valve plate are fixedly connected in an eccentric manner. The eccentric distance between the axis of the valve shaft and the center line of the valve plate is 2-4 mm, forming the first eccentricity. The valve shaft and the sealing plane of the valve plate are eccentrically arranged. The eccentric distance between the axis of the valve shaft and the sealing plane of the valve seat is 3-8 mm, forming the second eccentricity.

[0011] The effects achieved by the above components are as follows: Due to the eccentric design, when the valve shaft rotates to drive the opening and closing of the sealing lip of the valve plate and the valve seat, the interference amount and friction force between the valve plate and the rubber seal during rotation are reduced. Thus, it is ensured that the valve plate is easier to open and close when opening and closing, and the wear of the rubber is reduced, extending the service life of the product.

[0012] The effects achieved by the above components are as follows: Since the sector gear and the valve shaft are integrated by welding process and the axis lines of the sector gear and the valve shaft are coaxial, the valve shaft will rotate the same angle as the sector gear.

[0013] Preferably, the surface of the valve seat is coated with a Teflon coating, and the valve seat is made of stainless steel.

[0014] The effects achieved by the above components are as follows: Teflon coating on the surface of the valve seat ensures good lubricity between the valve plate and the rubber sealing lip.

[0015] Preferably, an annular groove is provided at the position of the aluminum housing relative to the sector gear. One side of the sector gear close to the valve shaft is fixedly connected with a torsion spring, and the end of the torsion spring away from the sector gear is fixedly connected with the inner wall of the annular groove on the aluminum housing.

[0016] The effects achieved by the above components are as follows: When the torsion spring extends, the sector gear will rotate in the opposite direction by virtue of the torsion of the torsion spring. The torsion spring serves to automatically reset the sector gear, thereby ensuring the sealing function of the product when powered off.

[0017] Preferably, a shaft hole is provided on one side of the sector gear away from the valve shaft. A magnet is riveted to the inner wall of the shaft hole on the sector gear. A non-contact Hall sensor is fixedly connected to the plastic cover relative to the magnet. The axis line of the magnet is coaxial with the axis line of the valve shaft, and the non-contact Hall sensor is electrically connected to the driver.

[0018] The effects achieved by the above components are as follows: Since the axis line of the magnet is coaxial with the axis line of the valve shaft, when the valve shaft rotates, the magnet will rotate synchronously. The non-contact Hall sensor can identify the rotation angle of the valve shaft according to the rotation angle of the magnet and feedback it to the intelligent control module.

[0019] Preferably, the magnet is circular or square and is radially magnetized, with NS poles formed in the diameter direction.

[0020] The effects achieved by the above components are as follows: Since the magnet is circular or square and is radially magnetized, with NS poles formed in the diameter direction, the non-contact Hall sensor can accurately identify the rotation angle of the magnet by recognizing the change of the magnetic field.

[0021] Preferably, a sealing lip is fixedly connected to the end face of the valve seat, and the sealing lip is made of rubber.

[0022] The effects achieved by the above components are as follows: When the valve plate contacts the sealing lip, the rubber sealing lip will deform and closely contact the valve plate. The sealing line on the valve seat forms an end face seal after the valve seat and the aluminum housing are fitted together, making the electronic throttle valve completely sealed when not in use.

[0023] Preferably, the rotation range of the valve plate is 0° - 90°, the edge of the valve plate is a conical surface or a spherical surface, and the thickness of the valve plate is 2 mm - 4 mm.

[0024] The effects achieved by the above components are as follows: By adjusting the angle of the valve plate, the flow rate of the medium in the electronic throttle valve can be adjusted. The valve plate with a conical surface or a spherical surface at the edge can reduce the resistance of the valve plate to open and close.

[0025] Preferably, the inner wall of the flow channel on the aluminum housing is coated with a Teflon coating, the surface of the valve plate is coated with a Teflon coating, and the valve plate is made of stainless steel.

[0026] The effects achieved by the above components are as follows: The inner wall of the flow channel is coated with Teflon on the surface to achieve good corrosion resistance and reduce weight. The surface of the valve plate is coated with Teflon to reduce the surface friction of the valve plate, reduce the friction between the valve plate and the sealing lip, extend the life of the rubber, and the stainless steel valve plate can be corrosion-resistant.

[0027] Preferably, the intelligent control system includes an intelligent control module, a valve module, an intelligent program module, a CAN communication module, and an FCU instruction module. The output end and the input end of the intelligent control module are electrically connected to the input end and the output end of the CAN communication module respectively. The output end and the input end of the CAN communication module are electrically connected to the input end and the output end of the FCU instruction module respectively. The output end of the intelligent control module is electrically connected to the input end of the intelligent program module. The output end of the intelligent program module is electrically connected to the input end of the valve module. The intelligent program module includes a switch program module, a boosting program module, an ice-breaking program module, and an adjustment program module.

[0028] The effects achieved by the above components are as follows: When it is necessary to adjust the state of the valve module, the FCU instruction module can issue an instruction and transmit the information to the CAN communication module. Then the CAN communication module will transmit the instruction information to the intelligent control module. The intelligent control module will control the operation of the set intelligent program module. At this time, the switch program module in the intelligent program module can control the valve module to open or close. The boosting program module can ensure that the valve template can stop at the specified position when shutting down, achieving a good sealing effect. The ice-breaking program module can ensure that the valve plate opens when there is ice between the valve plate and the valve seat, and the ice-breaking program module can also ensure that the opening force of the valve plate is relatively large but will not burn out the motor. The adjustment program module can adjust the opening degree of the valve module. During this process, the intelligent control module can feedback the opening or closing state of the valve module to the CAN communication module, and the CAN communication module will feedback the data information to the FCU instruction module, so as to facilitate the user to understand the state information of the valve module in real time.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0030] 1. In the present invention, when the valve plate needs to be opened, the electrical connector can connect the external power supply and control signal. The driver controls the motor to start, and the movement of the output end of the motor drives the driving gear to move. Since the tooth surface of the driving gear meshes with the large gear of the double-layer gear, the movement of the driving gear drives the double-layer gear to rotate. During this process, the large gear teeth of the double-layer gear can reduce the speed. Since the tooth surface of the sector gear meshes with the small gear of the double-layer gear, the movement of the double-layer gear drives the sector gear to move. Because the sector gear and the valve shaft are integrally formed by welding process, the valve shaft will rotate by the same angle as the sector gear. Since the valve shaft and the valve plate are connected by welding, the rotation of the valve shaft drives the valve plate to rotate synchronously. Since the valve shaft and the valve plate are of double-eccentric structure, under the same opening torque, the double-eccentric structure has less opening resistance, stronger torque and is more adaptable to opening the valve plate under different working conditions. When the valve shaft rotates, the magnet rotates synchronously. Since the magnet is circular or square and is radially magnetized to form NS poles in the diameter direction, the non-contact Hall sensor can accurately identify the rotation angle of the valve plate by recognizing the change of the magnetic field and feedback the recognized information to the intelligent control module. At the same time, the shaft hole opened on the sector gear ensures the accurate positioning between the sector gear and the magnet, and thermal riveting connection is carried out after installation, which not only improves the manufacturing efficiency but also ensures the reliable installation accuracy. The valve plate moves between 0 degrees and 90 degrees, which can control the size of the flow passage diameter, thereby controlling the flow rate of the medium in the electronic throttle valve. The inner wall of the valve body flow passage is coated with surface Teflon, which plays the role of good corrosion resistance and weight reduction. The surface of the valve plate and the surface of the valve seat are coated with Teflon, so that a good lubricity is maintained between the valve plate and the rubber sealing lip, which can extend the service life of the electronic throttle valve. The rotation of the sector gear also causes the torsion spring to contract. When the opening of the throttle valve plate needs to be adjusted, the intelligent control module drives the motor to rotate, overcomes the reverse force of the gear torsion spring to open, and at the same time receives the position signal of the position feedback, and maintains at any required angle through intelligent control. When the electronic throttle valve needs to be closed, the driver is used to turn off the motor. At this time, the torsion spring begins to stretch, and the sector gear rotates in the opposite direction by means of the torsion force of the torsion spring. The rotation of the sector gear drives the valve shaft to rotate along the inner walls of the ball bearing and the needle bearing. At this time, the sealing ring at the end face of the needle bearing plays the role of improving the sealing performance between the aluminum housing and the needle bearing. The rotation of the valve shaft drives the valve plate to rotate synchronously. At this time, the valve plate contacts the sealing lip, and the rubber sealing lip will deform and closely contact the valve plate. During this process, the valve plate with a conical or spherical surface at the edge can reduce the opening and closing resistance of the valve plate. The sealing lip on the valve seat forms an end face sealing structure after the valve seat is fitted with the aluminum housing, so that the electronic throttle valve is completely sealed when not in use. Through the cooperation of various components, the sealing between the valve plate and the valve seat is made tight, so as to prevent the medium leakage and the occurrence of hydrogen-air cross-section as much as possible, thereby improving the practicability of the electronic throttle valve and extending the service life of the hydrogen fuel cell.

[0031] 2. In the present invention, the valve plate and the valve seat are used in sets as mating parts. On the basis of using the same aluminum housing, different caliber sets can be pressed in, so as to realize the production of through-hole throttle valves with different size specifications from 20 to 60 mm, and further meet the requirements of fuel cell systems with a power of 10 - 250 kW. Moreover, by replacing the valve seat and the valve plate without sealing lips, the high-temperature resistance requirement can be achieved, and the applicable range of the electronic throttle valve can be expanded.

[0032] 3. In the present invention, by setting up an intelligent control system, when it is necessary to adjust the state of the valve module, the FCU instruction module can issue an instruction and transmit the information to the CAN communication module. Then, the CAN communication module will transmit the instruction information to the intelligent control module, and the intelligent control module will control the operation of the set intelligent program module. At this time, the switch program module in the intelligent program module can control the opening or closing of the valve module. The boosting program module can ensure that the valve template can stop at a specified position when shutting down, achieving a good sealing effect. The ice-breaking program module can ensure that the valve plate opens when there is ice between the valve plate and the valve seat, and the ice-breaking program module can also ensure that the opening force of the valve plate is relatively large but will not burn out the motor. The adjustment program module can adjust the opening degree of the valve module. During this process, the intelligent control module can feedback the opening or closing state of the valve module to the CAN communication module, and the CAN communication module will feedback the data information to the FCU instruction module, so as to facilitate the user to understand the state information of the valve module in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional structural schematic diagram of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention;

[0034] Figure 2 is an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention Figure 1 partial structural schematic diagram on the left;

[0035] Figure 3 is an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention Figure 2 disassembly structural schematic diagram;

[0036] Figure 4 is a structural schematic diagram of a double-layer gear of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention;

[0037] Figure 5 is a structural schematic diagram at the plastic cover of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention;

[0038] Figure 6 is an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention Figure 1Schematic cross-sectional structure diagram;

[0039] Figure 7 The present invention provides an intelligent control electronic throttle valve for a hydrogen fuel cell Figure 1 Schematic cross-sectional structure diagram on the right;

[0040] Figure 8 Schematic structure diagram at the valve plate of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention;

[0041] Figure 9 Schematic structure diagram at the valve shaft of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention;

[0042] Figure 10 Principle flow chart of an intelligent control electronic throttle valve for a hydrogen fuel cell proposed by the present invention.

[0043] Legend: 1. Aluminum housing; 2. Motor; 3. Double-layer gear; 4. Sector gear; 5. Magnet; 6. Torsion spring; 7. Valve shaft; 8. Electrical connector; 9. Valve seat; 10. Plastic cover; 11. Flow channel; 12. Valve plate; 13. Driving gear; 14. Non-contact Hall sensor; 15. Ball bearing; 16. Annular groove; 17. Needle bearing; 18. Driver. Detailed implementation manners

[0044] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0045] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0046] Embodiment 1, as Figure 1 and Figure 2 shown, the present invention provides an intelligent control electronic throttle valve for a hydrogen fuel cell, including an aluminum housing 1 and an intelligent control system.

[0047] As Figure 1 and Figure 3 and Figure 4As shown, a plastic cover 10 is snap-fitted to the side wall of the aluminum housing 1. An electrical connector 8 is fixedly connected to the outer wall of the plastic cover 10. A motor 2 is fixedly connected to the outer wall of the aluminum housing 1. The output end of the motor 2 is fixedly connected to a driving gear 13. The rotation of the output end of the motor 2 will drive the driving gear 13 to rotate. The driving gear 13 is located inside the aluminum housing 1. A double-layer gear 3 is rotatably connected to the inner wall of the aluminum housing 1. The large gear of the double-layer gear 3 meshes with the tooth surface of the driving gear 13. The rotation of the driving gear 13 will drive the double-layer gear 3 to rotate. An interference fit connection is made between a ball bearing 15 and the aluminum housing 1. An interference fit connection is made between the inner wall of the ball bearing 15 and a valve shaft 7. An interference fit connection is made between the arc surface of the valve shaft 7 and a needle bearing 17. The needle bearing 17 is in interference fit connection with the aluminum housing 1. A sealing ring is fixedly connected to the end face of the needle bearing 17. The sealing ring is made of rubber. One end of the valve shaft 7 is fixedly connected to a sector gear 4. The rotation of the sector gear 4 will drive the valve shaft 7 to rotate. The small gear of the double-layer gear 3 meshes with the tooth surface of the sector gear 4. The rotation of the double-layer gear 3 will drive the sector gear 4 to rotate. A flow channel 11 is formed in the aluminum housing 1. A valve plate 12 is fixedly connected to the arc surface of the end of the valve shaft 7 away from the sector gear 4. The rotation of the valve shaft 7 will drive the valve plate 12 to rotate. The valve plate 12 is located in the upper flow channel 11 of the aluminum housing 1. A valve seat 9 is fixedly connected to the inner wall of the upper flow channel 11 of the aluminum housing 1. A driver 18 is fixedly connected to the outer wall of the aluminum housing 1. The driver 18 is electrically connected to the motor 2. The valve plate 12 and the valve shaft 7 are processed by a welding process. The sector gear 4 and the valve shaft 7 are processed by a welding process. The axis of the sector gear 4 is coaxial with the axis of the valve shaft 7.

[0048] As Figure 3-9 As shown, the valve shaft 7 and the valve plate 12 are fixedly connected in an eccentric manner. The eccentric distance between the axis of the valve shaft 7 and the center line of the valve plate 12 is 2 - 4 mm, forming the first eccentricity. The sealing plane of the valve shaft 7 and the valve plate 12 is eccentrically arranged. The eccentric distance between the axis of the valve shaft 7 and the sealing plane of the valve seat 9 is 3 - 8 mm, forming the second eccentricity. Due to the eccentric design, when the valve shaft 7 rotates to drive the valve plate 12 to open and close the sealing lip of the valve seat 9, the interference amount and friction force between the valve plate 12 and the rubber seal during rotation are reduced. Thus, it is easier to open and close the valve plate 12 when opening and closing, and the wear of the rubber is reduced, extending the product life. The surface of the valve seat 9 is coated with a Teflon coating. The valve seat 9 is made of stainless steel. The surface of the valve seat 9 is coated with Teflon to maintain good lubricity between the valve plate 12 and the rubber sealing lip. An annular groove 16 is formed in the aluminum housing 1 at the position relative to the sector gear 4. A torsion spring 6 is fixedly connected to the side of the sector gear 4 close to the valve shaft 7. The end of the torsion spring 6 away from the sector gear 4 is fixedly connected to the inner wall of the annular groove 16 on the aluminum housing 1. When the torsion spring 6 expands, the sector gear 4 will rotate in the opposite direction by means of the torsion force of the torsion spring 6. The torsion spring 6 serves to automatically reset the sector gear 4, thereby ensuring the sealing function of the product when power is off.

[0049] As Figure 4 and Figure 7 as well as Figure 8 shown, a shaft hole is provided on the side of the sector gear 4 away from the valve shaft 7. A magnet 5 is riveted to the inner wall of the shaft hole on the sector gear 4. A non-contact Hall sensor 14 is fixedly connected to the position of the plastic cover 10 relative to the magnet 5. The axis line of the magnet 5 is coaxial with the axis line of the valve shaft 7. The non-contact Hall sensor 14 is electrically connected to the driver 18. Since the axis line of the magnet 5 is coaxial with the axis line of the valve shaft 7, when the valve shaft 7 rotates, the magnet 5 will rotate synchronously. The non-contact Hall sensor 14 can identify the rotation angle of the valve shaft 7 according to the rotation angle of the magnet 5 and feedback it to the intelligent control module. The magnet 5 is circular or square and is radially magnetized. The magnet 5 forms N and S poles in the diameter direction. Since the magnet 5 is circular or square and is radially magnetized to form N and S poles in the diameter direction, the non-contact Hall sensor 14 can accurately identify the rotation angle of the magnet 5 by identifying the change of the magnetic field.

[0050] As Figure 7 and Figure 8 as well as Figure 9 shown, a sealing lip is fixedly connected to the end face of the valve seat 9. The sealing lip is made of rubber. The valve plate 12 contacts the sealing lip. The rubber sealing lip will deform and closely contact the valve plate 12. The sealing lip on the valve seat 9 enables the end face formed after the valve seat 9 is attached to the aluminum shell 1 to be sealed, so that the electronic throttle valve is completely sealed when not in use. The rotation range of the valve plate 12 is 0 degrees - 90 degrees. The edge of the valve plate 12 is a conical surface or a spherical surface. The thickness of the valve plate 12 is 2 mm - 4 mm. By adjusting the angle of the valve plate 12, the flow rate of the medium in the electronic throttle valve can be adjusted. The valve plate 12 with a conical surface or a spherical surface at the edge can reduce the resistance of the valve plate 12 to open and close. The inner wall of the flow channel 11 on the aluminum shell 1 is coated with a Teflon coating. The inner wall of the flow channel 11 is coated with Teflon on the surface to achieve the effects of good corrosion resistance and weight reduction. The surface of the valve plate 12 is coated with a Teflon coating. The surface of the valve plate 12 is coated with Teflon on the surface to achieve the effect of reducing the surface friction of the valve plate 12. The valve plate 12 is made of stainless steel, and the stainless steel valve plate 12 can be corrosion-resistant.

[0051] As Figure 10As shown in the figure, the intelligent control system includes an intelligent control module, a valve module, an intelligent program module, a CAN communication module, and an FCU instruction module. The output end and the input end of the intelligent control module are electrically connected to the input end and the output end of the CAN communication module respectively. The FCU instruction module can issue instructions and transmit information to the CAN communication module. The output end and the input end of the CAN communication module are electrically connected to the input end and the output end of the FCU instruction module respectively. The CAN communication module transmits the instruction information to the intelligent control module. The output end of the intelligent control module is electrically connected to the input end of the intelligent program module. The intelligent control module controls the operation of the set intelligent program module. The output end of the intelligent program module is electrically connected to the input end of the valve module. The intelligent program module includes a switch program module, a boosting program module, an ice-breaking program module, and an adjustment program module. The switch program module can control the opening or closing of the valve module. The boosting program module can ensure that the valve template stops at a specified position when shutting down, achieving a good sealing effect. The ice-breaking program module can ensure that the valve plate 12 opens when there is ice between the valve plate 12 and the valve seat 9, and the ice-breaking program module can also ensure that the opening force of the valve plate 12 is relatively large but will not burn out the motor 2. The adjustment program module can adjust the opening degree of the valve module.

[0052] The overall working principle is as follows. When it is necessary to open the valve plate 12, the electrical connector 8 can connect to an external power supply and control signal. The motor 2 is started by the driver 18. The movement of the output end of the motor 2 drives the driving gear 13 to move. Since the tooth surface of the driving gear 13 meshes with the large gear of the double-layer gear 3, the movement of the driving gear 13 drives the double-layer gear 3 to rotate. During this process, the large gear teeth of the double-layer gear 3 can reduce the rotational speed. Since the tooth surface of the sector gear 4 meshes with the small gear of the double-layer gear 3, the movement of the double-layer gear 3 drives the sector gear 4 to move. Because the sector gear 4 and the valve shaft 7 are integrally formed by a welding process, the valve shaft 7 rotates by the same angle as the sector gear 4. Since the valve shaft 7 and the valve plate 12 are connected by welding, the rotation of the valve shaft 7 drives the valve plate 12 to rotate synchronously. Since the valve shaft 7 and the valve plate 12 are of a double-eccentric structure, under the same opening torque, the double-eccentric structure has less opening resistance, stronger torque and is more adaptable to opening the valve plate 12 under different working conditions. When the valve shaft 7 rotates, the magnet 5 rotates synchronously. Since the magnet 5 is circular or square and is radially magnetized to form NS poles in the diameter direction, the non-contact Hall sensor 14 can accurately identify the rotation angle of the valve plate 12 by recognizing the change of the magnetic field and feedback the recognized information to the intelligent control module. At the same time, the shaft hole opened on the sector gear 4 ensures the accurate positioning between the sector gear 4 and the magnet 5, and after installation, thermal riveting connection is carried out, which not only improves the manufacturing efficiency but also ensures reliable installation accuracy. The valve plate 12 moves between 0 degrees and 90 degrees, which can control the size of the flow-through diameter, thereby controlling the flow rate of the medium in the electronic throttle valve. The inner wall of the valve body flow channel 11 is coated with surface Teflon, which has the effect of good corrosion resistance and weight reduction. The surfaces of the valve plate 12 and the valve seat 9 are coated with Teflon, so that a relatively good lubricity is maintained between the valve plate 12 and the rubber sealing lip, which can extend the service life of the electronic throttle valve. The rotation of the sector gear 4 also causes the torsion spring 6 to contract. When it is necessary to close the electronic throttle valve, the motor 2 is closed by the driver 18. At this time, the torsion spring 6 begins to expand, and the sector gear 4 rotates in the opposite direction by means of the torsion of the torsion spring 6. The rotation of the sector gear 4 drives the valve shaft 7 to rotate along the inner walls of the ball bearing 15 and the needle bearing 17. At this time, the sealing ring at the end face of the needle bearing 17 plays a role in improving the sealing performance between the aluminum housing 1 and the needle bearing 17. The rotation of the valve shaft 7 drives the valve plate 12 to rotate synchronously. At this time, the valve plate 12 contacts the sealing lip, and the rubber sealing lip deforms and closely contacts the valve plate 12. During this process, the valve plate 12 with a conical or spherical surface at the edge can reduce the opening and closing resistance of the valve plate 12. The sealing lip on the valve seat 9 forms an end face sealing structure after the valve seat 9 is fitted with the aluminum housing 1, so that the electronic throttle valve is completely sealed when not in use.

[0053] The valve plate 12 and the valve seat 9 are used in sets as mating parts. On the basis of using the same aluminum housing 1, different calibers of sleeves can be pressed in to achieve the production of electronic throttle valves with different size specifications of through diameters from 20 to 60 mm, so as to meet the requirements of fuel cell systems with powers from 10 to 250 kW. Moreover, by replacing the valve seat 9 and the valve plate 12 without sealing lips, the high-temperature resistance requirement can be met, and the applicable range of the electronic throttle valve can be expanded.

[0054] When the state of the valve module needs to be adjusted, the FCU instruction module can issue an instruction and transmit the information to the CAN communication module. Then the CAN communication module will transmit the instruction information to the intelligent control module. The intelligent control module will control the operation of the set intelligent program module. At this time, the switch program module in the intelligent program module can control the opening or closing of the valve module. The boosting program module can ensure that the valve template can stop at the specified position when shutting down, achieving a good sealing effect. The ice-breaking program module can ensure that the valve plate 12 opens when there is ice between the valve plate 12 and the valve seat 9, and the ice-breaking program module can also ensure that the opening force of the valve plate 12 is relatively large but will not burn out the motor 2. The adjustment program module can adjust the opening degree of the valve module. During this process, the intelligent control module can feedback the opening or closing state of the valve module to the CAN communication module, and the CAN communication module will feedback the data information to the FCU instruction module, so as to facilitate the user to understand the state information of the valve module in real time.

[0055] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An intelligent control electronic throttle valve for a hydrogen fuel cell, comprising an aluminum housing (1) and an intelligent control system, characterized in that: The side wall of the aluminum housing (1) is snap - connected with a plastic cover (10). An electrical connector (8) is fixedly connected to the outer wall of the plastic cover (10). A motor (2) is fixedly connected to the outer wall of the aluminum housing (1). The output end of the motor (2) is fixedly connected with a driving gear (13). The driving gear (13) is located inside the aluminum housing (1). A double - layer gear (3) is rotatably connected to the inner wall of the aluminum housing (1). The large gear of the double - layer gear (3) meshes with the tooth surface of the driving gear (13). A ball bearing (15) is connected to the aluminum housing (1) by interference fit. The inner wall of the ball bearing (15) is connected to a valve shaft (7) by interference fit. A needle bearing (17) is connected to the arc surface of the valve shaft (7) by interference fit. The needle bearing (17) is connected to the aluminum housing (1) by interference fit. A sealing ring is fixedly connected to the end face of the needle bearing (17). The sealing ring is made of rubber. One end of the valve shaft (7) is fixedly connected with a sector gear (4). The small gear of the double - layer gear (3) meshes with the tooth surface of the sector gear (4). A flow channel (11) is opened inside the aluminum housing (1). A valve plate (12) is fixedly connected to the arc surface of the end of the valve shaft (7) away from the sector gear (4). The valve plate (12) is located in the flow channel (11) on the upper part of the aluminum housing (1). A valve seat (9) is fixedly connected to the inner wall of the flow channel (11) on the upper part of the aluminum housing (1). A driver (18) is fixedly connected to the outer wall of the aluminum housing (1). The driver (18) is electrically connected to the motor (2). The valve plate (12) and the valve shaft (7) are processed by welding technology. The sector gear (4) and the valve shaft (7) are processed by welding technology. The axis of the sector gear (4) is coaxial with the axis of the valve shaft (7).

2. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: The valve shaft (7) and the valve plate (12) are fixed in an eccentric manner. The eccentric distance between the axis of the valve shaft (7) and the center line of the valve plate (12) is 2 - 4 mm, forming the first eccentricity. The sealing plane of the valve shaft (7) and the valve plate (12) is arranged eccentrically. The eccentric distance between the axis of the valve shaft (7) and the sealing plane of the valve seat (9) is 3 - 8 mm, forming the second eccentricity.

3. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: The surface of the valve seat (9) is coated with a Teflon coating. The valve seat (9) is made of stainless steel.

4. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: An annular groove (16) is opened at the position of the aluminum housing (1) relative to the sector gear (4). A torsion spring (6) is fixedly connected to the side of the sector gear (4) close to the valve shaft (7). The end of the torsion spring (6) away from the sector gear (4) is fixedly connected to the inner wall of the annular groove (16) on the aluminum housing (1).

5. An intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: A shaft hole is opened on the side of the sector gear (4) away from the valve shaft (7). A magnet (5) is riveted to the inner wall of the shaft hole on the sector gear (4). A non - contact Hall sensor (14) is fixedly connected to the position of the plastic cover (10) relative to the magnet (5). The axis of the magnet (5) is coaxial with the axis of the valve shaft (7). The non - contact Hall sensor (14) is electrically connected to the driver (18).

6. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 5, characterized in that: The magnet (5) is circular or square and is radially magnetized, and the magnet (5) forms N and S poles in the diameter direction.

7. An intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: A sealing lip is fixedly connected to the end face of the valve seat (9), and the sealing lip is made of rubber.

8. An intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: The rotation range of the valve plate (12) is 0 degrees - 90 degrees, the edge of the valve plate (12) is a conical surface or a spherical surface, and the thickness of the valve plate (12) is 2 mm - 4 mm.

9. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: The inner wall of the flow channel (11) on the aluminum shell (1) is coated with a Teflon coating, the surface of the valve plate (12) is coated with a Teflon coating, and the valve plate (12) is made of stainless steel.

10. The intelligent control electronic throttle valve for a hydrogen fuel cell according to claim 1, characterized in that: The intelligent control system includes an intelligent control module, a valve module, an intelligent program module, a CAN communication module, and an FCU instruction module. The output end and the input end of the intelligent control module are electrically connected to the input end and the output end of the CAN communication module respectively. The output end and the input end of the CAN communication module are electrically connected to the input end and the output end of the FCU instruction module respectively. The output end of the intelligent control module is electrically connected to the input end of the intelligent program module. The output end of the intelligent program module is electrically connected to the input end of the valve module. The intelligent program module includes a switch program module, a boosting program module, an ice-breaking program module, and an adjustment program module.

Images