Highly stable replaceable hydrogen pump for fuel cells

Abstract

This invention relates to the field of hydrogen pump technology, specifically to a highly stable replaceable hydrogen pump for fuel cells. It includes a hydrogen pump body, a side pressure damping mechanism, a guide seat, a slide seat, and a blocking mechanism. The slide seat is slidably mounted on top of the guide seat, and the hydrogen pump body is slidably mounted on top of the slide seat. The blocking mechanism blocks the end of the slide seat. The slide seat has at least two limiting posts for limiting the position of the hydrogen pump body. With this highly stable replaceable hydrogen pump for fuel cells, the hydrogen pump body can be disassembled or installed by a worker driving the blocking mechanism. The entire disassembly process is rapid. When the side pressure damping mechanism presses against the hydrogen pump body, it can guide some of the vibration of the hydrogen pump body, thereby reducing the noise of the hydrogen pump body. After pressing, if it is necessary to increase the pressing force of the side pressure damping mechanism on the hydrogen pump body, it can be continued by a linear push mechanism. When the block is pushed, it can still block the slide seat.

Description

Technical Field

[0001] This invention relates to the field of hydrogen pump technology, and more specifically to a highly stable replaceable hydrogen pump for fuel cells. Background Technology

[0002] The evaluation method for the lifespan of automotive proton exchange membrane fuel cell stacks involves cyclically switching between various operating conditions during lifespan testing. Since the hydrogen ejector is less efficient at low power, the hydrogen pump will be frequently started and stopped under varying load conditions during these switching and load changes. Assuming a stack lifespan of 5000 hours and 200,000 cycles, with 40 cycles per hour and one cycle every 1.5 minutes, this method matches the variable load conditions of the fuel cell system lifespan test. If the expected stack lifespan is longer, the hydrogen pump can be considered a consumable component and replaced.

[0003] To facilitate hydrogen pump replacement, bolts or screws are used to secure the pump to the fuel cell. However, troubleshooting before pump replacement generates significant heat in the fuel cell casing, compounded by the limited space in the vehicle. Therefore, a quick-replacement hydrogen pump is needed. Existing bolt connections are unsuitable for this rapid replacement, while quick-release clips can be dislodged by hydrogen-generated vibrations, causing the pump to detach and malfunction. Furthermore, the pump's operation generates considerable noise, affecting driver and passenger comfort. Therefore, a quick-disassembly, highly stable, and noise-reducing hydrogen pump design is necessary. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of this invention is to provide a highly stable replaceable hydrogen pump for fuel cells, and to design a hydrogen pump that can be quickly disassembled, has high stability, and can also reduce noise.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a highly stable replaceable hydrogen pump for fuel cells, including a hydrogen pump body, a side pressure damping mechanism, a guide seat, a slide seat, and a blocking mechanism. The slide seat is slidably mounted on the top of the guide seat, and the hydrogen pump body is slidably mounted on the top of the slide seat. The blocking mechanism is used to block the end of the slide seat, so that the slide seat is fixed to the guide seat. The slide seat has at least two limiting posts for limiting the hydrogen pump body. The hydrogen pump body is provided with a socket for the limiting posts to be inserted. The side pressure damping mechanism is drivenly connected to the blocking mechanism. When the blocking mechanism limits and blocks the slide seat, the side pressure damping mechanism applies downward pressure to the hydrogen pump body, pressing the hydrogen pump body tightly onto the slide seat.

[0006] Preferably, the side pressure damping mechanism includes a damper, a transmission mechanism, a rubber pressure plate, a mounting plate, a contact spring, a rotating plate, and a rotating base. The rotating plate is rotatably mounted on the rotating base. The transmission mechanism is connected to the blocking mechanism. When the blocking mechanism drives the transmission mechanism, the transmission mechanism will drive the rotating plate to rotate. The mounting plate is linearly slidably mounted on the damper. The rubber pressure plate is fixedly mounted on the side of the mounting plate near the hydrogen pump body. The contact spring is used to apply an elastic force away from the rotating plate to the rubber pressure plate. The damper is fixedly mounted on the mounting plate and is used to consume the elastic force of the contact spring.

[0007] Preferably, the transmission mechanism includes a gear and a rack, the gear is fixedly connected to the rotating shaft of the rotating plate, and the rack is fixedly installed on the blocking mechanism, with the rack meshing with the gear.

[0008] Preferably, the blocking mechanism includes a stop block, a hinge rod, a linear push mechanism, and two guide bars. The rack is slidably connected to the guide bars, the stop block is fixedly installed on the rack, and the stop block is used to block one end of the slide block. One end of the hinge rod is hinged to the rack, and the other end of the hinge rod is hinged to the displacement seat of the linear push mechanism.

[0009] Preferably, the linear drive mechanism includes a second rotating seat, a rotating rod, and a displacement seat. The second rotating seat is fixedly installed on the guide seat, and the rotating rod is rotatably connected to the second rotating seat. An external thread is provided on the outer edge of the rotating rod, and an internal thread that meshes with the rotating rod is provided on the displacement seat. One end of the hinge rod is hinged to the displacement seat.

[0010] Preferably, at least two guide posts are fixedly provided on the mounting plate, and a sliding hole is provided on the rotating plate to slide and connect with the guide posts. A limiting plate for limiting is provided at the end of the guide post away from the mounting plate.

[0011] Preferably, the damper includes a friction plate fixedly mounted on the mounting plate and a friction strip fixedly mounted on the rotating plate, wherein the frictional force between the friction plate and the friction strip is less than the initial elastic force of the resisting spring.

[0012] Preferably, the slide block is provided with a shaped slide bar, the guide seat is provided with a slide groove that cooperates with the shaped slide bar, and the guide seat is provided with a limiting baffle for limiting one end of the slide block.

[0013] Preferably, there are two side pressure damping mechanisms, which are respectively arranged on both sides of the hydrogen pump body, and both side pressure damping mechanisms are connected to the blocking mechanism in a transmission manner.

[0014] The beneficial effects of this invention are as follows: the fuel cell uses a highly stable replaceable hydrogen pump, and the hydrogen pump body can be disassembled or installed by the worker driving the blocking mechanism. The entire disassembly process is quick, and when the hydrogen pump body is pressed by the side pressure damping mechanism, some of the vibration of the hydrogen pump body can be guided out. By reducing the vibration of the hydrogen pump body, the noise of the hydrogen pump body is reduced.

[0015] After clamping, if it is necessary to increase the clamping force of the side pressure damping mechanism on the hydrogen pump body, it can be continued to be pushed by the linear push mechanism. Figure 7 It can be seen that the stop block can still block the slide when it is pushed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from another perspective.

[0019] Figure 3 This is a three-dimensional structural diagram of the side pressure damping mechanism of the present invention in the open state.

[0020] Figure 4 This is a partial three-dimensional structural diagram of the present invention. Figure 1 .

[0021] Figure 5 This is a three-dimensional structural diagram of the blocking mechanism.

[0022] Figure 6 This is a partial three-dimensional structural diagram of the present invention. Figure 2 .

[0023] Figure 7 for Figure 1 A three-dimensional structural diagram of the hydrogen pump body without its physical components.

[0024] Figure 8 This is a partial three-dimensional structural exploded view of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1-Hydrogen pump body; 2-Side pressure damping mechanism; 2a-Damper; 2a1-Friction plate; 2b-Transmission mechanism; 2b1-Gear; 2b2-Rack; 2c-Rubber pressure plate; 2d-Mounting plate; 2e-Contact spring; 2f-Rotating plate; 2h-Rotating seat one; 2j-Guide post; 2k-Limiting plate; 3-Guide seat; 3a-Limiting baffle; 4-Slide seat; 5-Blocking mechanism; 5a-Guide bar; 5b-Block; 5c-Hinge rod; 5d-Linear push mechanism; 5d1-Rotating seat two; 5d2-Rotating rod; 5d3-Displacement seat; 6-Limiting insert. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example: This invention provides a highly stable replaceable hydrogen pump for fuel cells, including a hydrogen pump body 1, a side pressure damping mechanism 2, a guide seat 3, a slide 4, and a blocking mechanism 5. The slide 4 is slidably mounted on the top of the guide seat 3, and the hydrogen pump body 1 is slidably mounted on the top of the slide 4. The guide seat 3, the side pressure damping mechanism 2, and the blocking mechanism 5 are all fixedly mounted on the outer shell of the fuel cell. The blocking mechanism 5 is used to block the end of the slide 4, so that the slide 4 is fixed to the guide seat 3. The slide 4 has at least two limiting posts 6 for limiting the hydrogen pump body 1. The hydrogen pump body 1 is provided with a socket for the limiting posts 6 to be inserted. The side pressure damping mechanism 2 is drivenly connected to the blocking mechanism 5. When the blocking mechanism 5 limits and blocks the slide 4, the side pressure damping mechanism 2 applies downward pressure to the hydrogen pump body 1, pressing the hydrogen pump body 1 tightly onto the slide 4. When the hydrogen pump body 1 needs to be disassembled and replaced, the blocking mechanism 5 is released, so that the blocking mechanism 5 no longer limits and blocks the slide 4. At the same time, the side pressure damping mechanism 2 will also release the pressure on the hydrogen pump body 1. At this time, the hydrogen pump body 1 can be pushed so that the air inlet and outlet of the hydrogen pump body 1 are no longer connected to the pipeline. The worker can then lift the hydrogen pump body 1 upward so that the hydrogen pump body 1 is no longer inserted with the limiting plug 6. The entire process mainly requires the worker to drive the blocking mechanism 5. That is, the entire disassembly process is quick. When the side pressure damping mechanism 2 presses the hydrogen pump body 1, it can guide some of the vibration of the hydrogen pump body 1. By reducing the vibration of the hydrogen pump body 1, the noise of the hydrogen pump body 1 is reduced.

[0028] In order to achieve the goal of pressing the hydrogen pump body 1 against the slide block 4 by the side pressure damping mechanism 2 when the blocking mechanism 5 moves, and to guide the vibration of the hydrogen pump body 1 so as to reduce the noise of the hydrogen pump body 1, such as... Figure 4As shown, the side-pressure damping mechanism 2 includes a damper 2a, a transmission mechanism 2b, a rubber pressure plate 2c, a mounting plate 2d, a contact spring 2e, a rotating plate 2f, and a rotating seat 2h. The rotating plate 2f is rotatably mounted on the rotating seat 2h. The transmission mechanism 2b is connected to the blocking mechanism 5. When the blocking mechanism 5 drives the transmission mechanism 2b to move, the transmission mechanism 2b will drive the rotating plate 2f to rotate. The mounting plate 2d is linearly slidably mounted on the damper 2a. The rubber pressure plate 2c is fixedly mounted on the side of the mounting plate 2d near the hydrogen pump body 1. The contact spring 2e is used to apply an elastic force away from the rotating plate 2f to the rubber pressure plate 2c. The damper 2a is fixedly mounted on the mounting plate 2d. The damper 2a is used to consume the elastic force of the contact spring 2e. By consuming the elastic force, the damping of the contact spring 2e is achieved. The structure of the spring damper is existing technology and will not be described here. After the rotating plate 2f is driven to rotate, it will push the rubber pressure plate 2c to rotate and press against the hydrogen pump body 1. During the pressing process, the contact spring 2e will be compressed. When the blocking mechanism 5 blocks the slide 4, there is a range. When it moves to the left, the rotating plate 2f will rotate towards the hydrogen pump body 1. Conversely, the rotating plate 2f will rotate in the opposite direction. Rotating towards the hydrogen pump body 1 will increase the compression of the contact spring 2e, that is, increase the pressing force, so that the hydrogen pump body 1 can be stably pressed. The greater the pressing force, the more the transmitted vibration will increase, further reducing noise.

[0029] like Figure 4 As shown, the transmission mechanism 2b includes a gear 2b1 and a rack 2b2. The gear 2b1 is fixedly connected to the rotating shaft of the rotating plate 2f, and the rack 2b2 is fixedly installed on the blocking mechanism 5, meshing with the gear 2b1. When the blocking mechanism 5 is working, it will drive the rack 2b2 to move linearly, causing the rack 2b2 to drive the gear 2b1 to rotate through meshing. That is, the gear 2b1 drives the rotating plate 2f to rotate.

[0030] like Figure 5 and Figure 6 As shown, the blocking mechanism 5 includes a stop block 5b, a hinge rod 5c, a linear push mechanism 5d, and two guide bars 5a. The rack 2b2 is slidably connected to the guide bars 5a. The stop block 5b is fixedly installed on the rack 2b2. The stop block 5b blocks one end of the slide block 4, while the other end of the slide block 4 is blocked by the main body structure of the guide bar 3. That is, once one end of the slide block 4 is blocked, the slide block 4 can be fixed. One end of the hinge rod 5c is hinged to the rack 2b2, and the other end of the hinge rod 5c is hinged to the displacement seat of the linear push mechanism 5d. By pushing the end of the hinge rod 5c closer to the slide block 4 through the linear push mechanism 5d, the hinge rod 5c will push the stop block 5b and the rack 2b2 outwards, causing the stop block 5b to block the slide block 4. Furthermore, the side-pressure damping mechanism 2 presses against the outer edge of the hydrogen pump body 1, and as shown... Figure 7As shown, this is the compressed state. After compression, if it is necessary to increase the compression force of the side pressure damping mechanism 2 on the hydrogen pump body 1, it can be further pushed by the linear push mechanism 5d. Figure 7 It can be seen that when the stop block 5b is pushed, it can still block the slide block 4. Among them, when increasing the squeezing force of the side pressure damping mechanism 2 on the hydrogen pump body 1, the distance of the linear push mechanism 5d is relatively small, and the angle that the side pressure damping mechanism 2 can rotate will also be larger, which meets the requirement of increasing the squeezing force, that is, preventing the stop block 5b and the slide block 4 from moving apart.

[0031] like Figure 5 As shown, the linear actuator 5d includes a second rotating seat 5d1, a rotating rod 5d2, and a displacement seat 5d3. The second rotating seat 5d1 is fixedly mounted on the guide seat 3. The rotating rod 5d2 is rotatably connected to the second rotating seat 5d1. The outer edge of the rotating rod 5d2 is provided with an external thread. The displacement seat 5d3 is provided with an internal thread that meshes with the rotating rod 5d2. One end of the hinge rod 5c is hinged to the displacement seat 5d3. By rotating the rotating rod 5d2, the displacement seat 5d3 can be driven to move linearly, causing the displacement seat 5d3 to drive one end of the hinge rod 5c to move. The entire disassembly process only requires driving one rotating rod 5d2, and both disassembly and installation are very rapid.

[0032] like Figure 7 As shown, at least two guide posts 2j are fixedly provided on the mounting plate 2d, and a sliding hole is provided on the rotating plate 2f to slide and connect with the guide posts 2j. A limiting plate 2k for limiting is provided at the end of the guide post 2j away from the mounting plate 2d, that is, so that the mounting plate 2d and the rotating plate 2f are slidably connected. The abutment spring 2e is sleeved on the guide post 2j, with one end of the abutment spring 2e abutting the mounting plate 2d and the other end abutting the rotating plate 2f.

[0033] like Figure 7 As shown, the damper 2a includes a friction plate 2a1 fixedly mounted on the mounting plate 2d and a friction strip fixedly mounted on the rotating plate 2f. The frictional force between the friction plate 2a1 and the friction strip is less than the initial elastic force of the resisting spring 2e, so that after the resisting spring 2e is compressed, the resisting spring 2e can still push the friction plate 2a1 to return to its original position. The frictional force between the friction plate 2a1 and the friction strip is used to consume the force generated by the vibration.

[0034] like Figure 8 As shown, the slide 4 is provided with a T-shaped slide bar, the guide seat 3 is provided with a slide groove that mates with the T-shaped slide bar, and the guide seat 3 is provided with a limiting baffle 3a for limiting one end of the slide 4. By limiting one end of the slide 4 with the limiting baffle 3a, that is, after the stop block 5b blocks the T-shaped slide bar on the slide 4, it also blocks the other end of the slide 4, thus fixing the slide 4.

[0035] There are two side-pressure damping mechanisms 2, which are respectively located on both sides of the hydrogen pump body 1, and both side-pressure damping mechanisms 2 are connected to the blocking mechanism 5. By pressing and fixing the hydrogen pump body 1 with the two side-pressure damping mechanisms 2, the hydrogen pump body 1 can be made more stable.

[0036] In use, when it is necessary to disassemble the hydrogen pump body 1, the worker drives the linear actuator 5d, which in turn moves the stop block 5b and the rotating plate 2f. The stop block 5b will no longer obstruct the T-shaped slide bar of the slide block 4, and the rubber pressure plate 2c will no longer press against the hydrogen pump body 1. At this point, the hydrogen pump body 1 can be pushed, causing the slide block 4 to slide along the guide seat 3, thus decoupling the inlet and outlet of the hydrogen pump body 1 from the pipeline. The worker can then lift the hydrogen pump body 1 upwards, decoupling it from the limiting pin 6, thus completing the disassembly. When it is necessary to install the hydrogen pump body 1, the reverse steps are repeated.

[0037] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-stable replaceable hydrogen pump for fuel cell, characterized in that, The hydrogen pump body (1), the side pressure damping mechanism (2), the guide base (3), the sliding base (4) and the blocking mechanism (5) are provided, the sliding base (4) is slidably installed on the top of the guide base (3), the hydrogen pump body (1) is slidably installed on the top of the sliding base (4), the blocking mechanism (5) is used for blocking the end of the sliding base (4), so that the sliding base (4) is fixed to the guide base (3), the sliding base (4) has at least two limiting insertion columns (6) for limiting the hydrogen pump body (1), the hydrogen pump body (1) is provided with an insertion hole for the limiting insertion column (6), the side pressure damping mechanism (2) is in transmission connection with the blocking mechanism (5), when the blocking mechanism (5) limits and blocks the sliding base (4), the side pressure damping mechanism (2) applies downward pressure to the hydrogen pump body (1), and the hydrogen pump body (1) is pressed on the sliding base (4); The side pressure damping mechanism (2) includes a damper (2a), a transmission mechanism (2b), a rubber pressing plate (2c), a mounting plate (2d), a contact spring (2e), a rotating plate (2f) and a rotating seat one (2h), the rotating plate (2f) is rotatably installed on the rotating seat one (2h), the transmission mechanism (2b) is in transmission connection with the blocking mechanism (5), when the blocking mechanism (5) drives the transmission mechanism (2b) to move, the transmission mechanism (2b) drives the rotating plate (2f) to rotate, at least two guide columns (2j) are fixedly arranged on the mounting plate (2d), a sliding hole in sliding connection with the guide columns (2j) is formed in the rotating plate (2f), a limiting plate (2k) for limiting is arranged at the end, away from the mounting plate (2d), of the guide column (2j), the rubber pressing plate (2c) is fixedly installed on the side, close to the hydrogen pump body (1), of the mounting plate (2d), the contact spring (2e) is used for applying elastic force, away from the rotating plate (2f), to the rubber pressing plate (2c), and the damper (2a) is fixedly installed on the mounting plate (2d) and is used for consuming the elastic force of the contact spring (2e).

2. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 1, wherein, The transmission mechanism (2b) includes a gear (2b1) and a rack (2b2), the gear (2b1) is fixedly connected with the rotating shaft of the rotating plate (2f), and the rack (2b2) is fixedly installed on the blocking mechanism (5) and is in mesh with the gear (2b1).

3. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 2, wherein, The blocking mechanism (5) includes a stop block (5b), a hinged rod (5c), a linear pushing mechanism (5d) and two guide strips (5a), the rack (2b2) is in sliding connection with the guide strips (5a), the stop block (5b) is fixedly installed on the rack (2b2) and is used for blocking one end of the sliding base (4), one end of the hinged rod (5c) is hinged with the rack (2b2), and the other end of the hinged rod (5c) is hinged with the displacement seat of the linear pushing mechanism (5d).

4. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 3, wherein, The linear pushing mechanism (5d) includes a rotating seat two (5d1), a rotating rod (5d2) and a displacement seat (5d3), the rotating seat two (5d1) is fixedly installed on the guide base (3), the rotating rod (5d2) is rotatably connected with the rotating seat two (5d1), an outer thread is formed on the outer edge of the rotating rod (5d2), an inner thread in mesh with the rotating rod (5d2) is arranged on the displacement seat (5d3), and one end of the hinged rod (5c) is hinged with the displacement seat (5d3).

5. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 1, wherein, The damper (2a) comprises a friction plate (2a1) fixedly installed on the mounting plate (2d) and a friction strip fixedly installed on the rotating plate (2f), and the friction force between the friction plate (2a1) and the friction strip is smaller than the initial elastic force of the abutting spring (2e).

6. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 1, wherein, The sliding seat (4) is provided with a T-shaped sliding strip, the guide seat (3) is provided with a sliding groove matched with the T-shaped sliding strip, and the guide seat (3) is provided with a limiting baffle (3a) for limiting one end of the sliding seat (4).

7. The high-stable replaceable hydrogen pump for fuel cell as claimed in claim 1, wherein, The side pressure damping mechanism (2) is two, two side pressure damping mechanisms (2) are arranged on both sides of the hydrogen pump body (1), and the two side pressure damping mechanisms (2) are in transmission connection with the blocking mechanism (5).

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