A durability test device for a hydrogen circulation pump

Abstract

The present invention relates to the technical field of durability test equipment, and specifically relates to a durability test device for a hydrogen circulation pump, which includes a bottom plate. Two parallel slide rails are fixedly connected to the bottom plate. A placement rack is slidably connected to the slide rails. A hydrogen circulation pump is placed on the placement rack. An air inlet and an air outlet are provided on the hydrogen circulation pump. A driving mechanism is further provided on the bottom plate. The driving mechanism is connected to the placement rack. A docking mechanism and a transmission mechanism are also provided on the bottom plate. In the present invention, through the provided driving structure, when driving the hydrogen circulation pump on the placement rack to move and making the air inlet and the air outlet dock with the sealing sleeve, the clamping blocks can be driven by the transmission mechanism to contract inward, firmly fixing the air inlet and the air outlet to the sealing sleeve, achieving a sealing effect, enabling the hydrogen circulation pump and the gas supply mechanism to be quickly connected through the docking mechanism without multiple connections, and being relatively convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of durability test equipment, and specifically provides a durability test device for a hydrogen circulation pump. Background Art

[0002] ‌For a hydrogen fuel cell to drive vehicles, ships, and drones, it also requires the assistance of other systems. The fuel cell stack, hydrogen supply and circulation system, air supply system, water heat management system, etc. together constitute the hydrogen fuel cell system. Among them, the hydrogen supply and circulation system‌ is mainly responsible for adjusting the pressure of hydrogen, humidifying hydrogen, and providing sufficient hydrogen to the fuel cell stack in a timely manner. The hydrogen circulation pump is a device that is responsible for continuously supplying high-purity hydrogen with a certain pressure and flow rate to the fuel cell stack to ensure the normal progress of the electrochemical reaction in the fuel cell stack.

[0003] Good stability of hydrogen supply is helpful for the durability of the fuel cell. This is because the fuel cell stack of a fuel cell vehicle requires the hydrogen pressure to be much lower than the outlet pressure, and improper pressure regulation is likely to cause permanent damage to the proton exchange membrane. Therefore, the hydrogen pressure needs to be kept stable. The primary task of the hydrogen circulation pump in the hydrogen fuel cell system is to maintain a stable supply of hydrogen. Therefore, it is necessary to detect the durability of the hydrogen circulation pump.

[0004] A prior patent (Publication No.: CN113027745A) discloses a durability test device for a hydrogen circulation pump, including an intake pipe, a flow detector, a pressure stabilizing tank a, a hydrogen circulation pump, and a pipeline a; the outlet of the flow detector is connected to the inlet of the pressure stabilizing tank a through a pipeline b, and the outlet of the pressure stabilizing tank a is connected to the inlet of the hydrogen circulation pump through a pipeline; the outlet of the hydrogen circulation pump is connected to the inlet of the pipeline a through a pipeline, and the outlet of the pipeline a is connected to the inlet pipe of the flow detector; an intake pipe is provided on the inlet pipe, and a valve a is provided on the intake pipe. However, in the actual test process, the following problems are found: the ventilation pipeline of this device needs to be connected in sequence, which is relatively complex, making it impossible to quickly replace the hydrogen circulation pump to be tested, resulting in low detection efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a durability test device for a hydrogen circulation pump to solve the problem of complex connection between the hydrogen circulation pump and the ventilation pipeline, resulting in low detection efficiency as mentioned in the above background art. To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A durability test device for a hydrogen circulation pump, comprising a bottom plate, on which two parallel sliding rails are fixedly connected. A placement rack is slidably connected to the sliding rails, and a hydrogen circulation pump is placed on the placement rack. An air inlet and an air outlet are provided on the hydrogen circulation pump. A driving mechanism is also provided on the bottom plate, and the driving mechanism is connected to the placement rack. A docking mechanism and a transmission mechanism are further provided on the bottom plate, the docking mechanism is connected to the transmission mechanism, and a gas supply mechanism is connected to the docking mechanism. A pressure indicator and a flow indicator are provided on the gas supply mechanism.

[0007] Preferably, the driving mechanism includes a driving cylinder fixedly connected to the bottom plate. The movable end of the driving cylinder is fixedly connected to a connecting bracket, and two pushing blocks are symmetrically and fixedly connected to the connecting bracket. Two fixing brackets are symmetrically and fixedly connected to the bottom end of the placement rack. A limiting block is slidably connected to the fixing bracket, and a first spring is connected between the limiting block and the fixing bracket. The pushing block is in contact with the limiting block on the same side.

[0008] Preferably, the docking mechanism includes two support brackets symmetrically and fixedly connected to the bottom plate. A connecting disk is fixedly connected to the support bracket, and three sliding grooves are evenly formed in the connecting disk. Clamping blocks are slidably connected in the three sliding grooves. A sealing sleeve is fixedly connected to one side of the connecting disk, and a connecting pipe is fixedly connected to the other side of the connecting disk. A connecting sleeve is rotatably connected to the connecting pipe, and a disk is fixedly connected to the connecting sleeve. Three guiding grooves are evenly formed in the disk. Guide rods I are fixedly connected to the clamping blocks, and the three guide rods I are respectively slidably connected in the three guiding grooves.

[0009] Preferably, the guiding groove is composed of a connected straight groove and an arc groove. When the disk rotates, the straight groove rotates to make the clamping block move along the sliding groove, and the arc groove rotates to make the clamping block remain stationary.

[0010] Preferably, the transmission mechanism includes a connecting block fixedly connected to the bottom plate. A driven rod is slidably connected to the connecting block, and a second spring is connected between one end of the driven rod and the connecting block. A cylinder is rotatably connected to the connecting block, and two spiral guiding grooves are evenly formed in the cylinder. A guide rod II is fixedly connected to the other end of the driven rod, and the guide rod II is slidably connected to the two spiral guiding grooves. A first belt pulley is fixedly connected to the cylinder, and second belt pulleys are fixedly connected to the two connecting sleeves. A synchronous belt is connected to the first belt pulley and the two second belt pulleys.

[0011] Preferably, the connecting bracket will abut against the driven rod during the moving process.

[0012] Preferably, the air supply mechanism includes two three-way valves which are symmetrically and fixedly connected to the two connecting pipes. An intake pipe is fixedly connected between the two three-way valves. A two-way valve is fixedly connected to the intake pipe and is also connected to a booster air pump. The booster air pump is fixedly connected to the bottom plate. A pressure indicator is also provided on the intake pipe. A flow indicator is also fixedly connected to the three-way valve on one side of the air outlet.

[0013] Preferably, a driven gear is fixedly connected to the valve core of the three-way valve. An arc-shaped rack is fixedly connected to the disc. During the rotation of the disc, the arc-shaped rack will engage with the driven gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, through the provided driving structure, when driving the hydrogen circulation pump on the placement rack to move, after the air inlet and the air outlet are docked with the sealing sleeve, the clamping block can be driven to contract inward through the transmission mechanism, firmly fixing the air inlet and the air outlet to the sealing sleeve, achieving a sealing effect, enabling the hydrogen circulation pump and the air supply mechanism to be quickly connected through the docking mechanism without multiple connections, and being relatively convenient to use.

[0016] 2. In the present invention, through the provided disc, after driving the clamping block to contract, the valve core of the three-way valve can be driven to rotate through the arc-shaped rack and the driven gear, enabling the connecting pipe to communicate with the intake pipe, so that high-pressure gas can be introduced into the hydrogen circulation pump, enabling the hydrogen circulation pump to operate in a high-pressure gas environment. By observing the pressure indicator, it can be judged whether there is a problem with the sealing performance during the operation of the hydrogen circulation pump.

[0017] 3. In the present invention, when the hydrogen circulation pump operates in a high-pressure gas environment for a certain period of time, the valve core of the three-way valve is driven to rotate again through the driving cylinder, so that the air inlet and the air outlet are communicated with the external environment. At this time, by observing the flow indicator, it can be judged whether there is a problem with the internal structure of the hydrogen circulation pump after operating in a high-pressure gas environment, thus achieving the effect of detecting the durability of the hydrogen circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of the driving mechanism in the present invention Figure 1 ;

[0020] Figure 3 is a schematic diagram of the structure of the driving mechanism in the present invention Figure 2 ;

[0021] Figure 4Structural schematic of the docking mechanism and transmission mechanism in the present invention Figure 1 ;

[0022] Figure 5 Structural schematic of the docking mechanism and transmission mechanism in the present invention Figure 2 ;

[0023] Figure 6 Schematic diagram of the connection structure between the disc and the first pulley in the present invention;

[0024] Figure 7 Structural schematic of the gas supply mechanism in the present invention Figure 1 ;

[0025] Figure 8 Structural schematic of the gas supply mechanism in the present invention Figure 2 .

[0026] In the figure: 1, bottom plate; 2, slide rail; 3, placement rack; 4, hydrogen circulation pump; 401, air inlet; 402, air outlet; 5, drive mechanism; 501, drive cylinder; 502, connection bracket; 503, push block; 504, fixed bracket; 505, limit block; 506, first spring; 6, docking mechanism; 601, support bracket; 602, connection disc; 603, chute; 604, clamping block; 605, sealing sleeve; 606, connecting pipe; 607, connecting sleeve; 608, disc; 609, guiding groove; 6091, straight groove; 6092, arc groove; 610, first guide rod; 7, transmission mechanism; 701, connection block; 702, driven rod; 703, second spring; 704, cylinder; 705, spiral guide groove; 706, second guide rod; 707, first pulley; 708, second pulley; 709, synchronous belt; 8, gas supply mechanism; 801, three-way valve; 802, inlet pipe; 803, two-way valve; 804, booster pump; 805, driven gear; 806, arc rack; 9, pressure indicator; 10, flow indicator. Specific embodiments

[0027] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical staff in the art without creative work fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 8 , the present invention provides a technical solution:

[0029] A durability testing device for a hydrogen circulation pump comprises a base plate 1, two parallel slide rails 2 are fixedly connected to the base plate 1, a placement rack 3 is slidably connected to the slide rail 2, a hydrogen circulation pump 4 is placed on the placement rack 3, an air inlet 401 and an air outlet 402 are arranged on the hydrogen circulation pump 4, a driving mechanism 5 is also arranged on the base plate 1, the driving mechanism 5 is connected to the placement rack 3, a docking mechanism 6 and a transmission mechanism 7 are also arranged on the base plate 1, the docking mechanism 6 is connected to the transmission mechanism 7, an air supply mechanism 8 is connected to the docking mechanism 6, and a pressure indicator 9 and a flow indicator 10 are arranged on the air supply mechanism 8.

[0030] In this embodiment, a positioning block is provided on the placement rack 3 , so that the hydrogen circulation pump 4 to be tested can be accurately placed on the placement rack 3 , ensuring that the hydrogen circulation pump 4 can be accurately docked with the docking mechanism 6 .

[0031] In this embodiment, the driving mechanism 5 includes a driving cylinder 501, which is fixedly connected to the base plate 1. The movable end of the driving cylinder 501 is fixedly connected to a connecting bracket 502. Two pushing blocks 503 are symmetrically fixedly connected to the connecting bracket 502. The bottom end of the placement rack 3 is symmetrically fixedly connected to two fixed brackets 504. A limiting block 505 is slidably connected to the fixed bracket 504. A spring 506 is connected between the limiting block 505 and the fixed bracket 504. The pushing block 503 is in contact with the limiting block 505 on the same side.

[0032] In this embodiment, the docking mechanism 6 includes two supporting brackets 601, and the two supporting brackets 601 are symmetrically fixedly connected to the base plate 1. A connecting disk 602 is fixedly connected to the supporting bracket 601, and three sliding grooves 603 are evenly opened on the connecting disk 602. A clamping block 604 is slidably connected in the three sliding grooves 603. A sealing sleeve 605 is fixedly connected to one side of the connecting disk 602, and a connecting pipe 606 is fixedly connected to the other side of the connecting disk 602. A connecting sleeve 607 is rotatably connected to the connecting pipe 606, and a circular disc 608 is fixedly connected to the connecting sleeve 607. Three guide grooves 609 are evenly opened on the circular disc 608. A guide rod 1 610 is fixedly connected to the clamping block 604, and the three guide rods 1 610 are respectively slidably connected in the three guide grooves 609.

[0033] In this embodiment, the ends of the sealing sleeve 605 expand outward so that the air inlet 401 and the air outlet 402 can be accurately inserted into the sealing sleeve 605. At the same time, the inner diameter of the main part of the sealing sleeve 605 is equal to the outer diameter of the air inlet 401 and the air outlet 402, so that the sealing sleeve 605 can fit perfectly with the air inlet 401 and the air outlet 402 under the pressure of the clamping block 604 to ensure sealing.

[0034] In this embodiment, the guiding groove 609 is composed of a connected straight groove 6091 and an arc groove 6092. When the disc 608 rotates, the straight groove 6091 will cause the clamping block 604 to move along the sliding groove 603 during rotation, and the arc groove 6092 will keep the clamping block 604 stationary during rotation.

[0035] In this embodiment, the transmission mechanism 7 includes a connecting block 701. The connecting block 701 is fixedly connected to the bottom plate 1. A driven rod 702 is slidably connected to the connecting block 701. A second spring 703 is connected between one end of the driven rod 702 and the connecting block 701. A cylinder 704 is also rotatably connected to the connecting block 701. Two spiral guide grooves 705 are evenly formed on the cylinder 704. A second guide rod 706 is fixedly connected to the other end of the driven rod 702. The second guide rod 706 is slidably connected to the two spiral guide grooves 705. A first belt pulley 707 is fixedly connected to the cylinder 704. A second belt pulley 708 is fixedly connected to each of the two connecting sleeves 607. A synchronous belt 709 is connected between the first belt pulley 707 and the two second belt pulleys 708.

[0036] In this embodiment, the connecting bracket 502 will abut against the driven rod 702 during the moving process.

[0037] In this embodiment, the air supply mechanism 8 includes two three-way valves 801. The two three-way valves 801 are symmetrically and fixedly connected to the two connecting pipes 606. An intake pipe 802 is fixedly connected between the two three-way valves 801. A two-way valve 803 is fixedly connected to the intake pipe 802. The two-way valve 803 is also connected to a supercharging air pump 804. The supercharging air pump 804 is fixedly connected to the bottom plate 1. A pressure indicator 9 is further provided on the intake pipe 802. A flow indicator 10 is also fixedly connected to the three-way valve 801 on one side of the air outlet 402.

[0038] In this embodiment, after the supercharging air pump 804 is started, it can absorb external gas and discharge it after pressurization. A pressure sensor is provided at the air outlet end of the supercharging air pump 804. When the air pressure detected by the pressure sensor reaches a certain value, the supercharging air pump 804 will stop outputting high-pressure gas. When the air pressure value detected by the pressure sensor decreases, the supercharging air pump 804 will output high-pressure gas again.

[0039] In this embodiment, a driven gear 805 is fixedly connected to the valve core of the three-way valve 801. An arc-shaped rack 806 is fixedly connected to the disc 608. During the rotation of the disc 608, the arc-shaped rack 806 will engage with the driven gear 805.

[0040] When the durability test device for this hydrogen circulation pump is working, the working process is as follows:

[0041] First, place the hydrogen circulation pump 4 to be tested on the placement rack 3, and then start the driving cylinder 501. The movable end of the driving cylinder 501 extends, driving the connecting bracket 502 to move. The connecting bracket 502 drives the pushing block 503 to move. The pushing block 503 drives the placement rack 3 to slide along the slide rail 2 through the limit block 505 and the fixed bracket 504. When the placement rack 3 moves to the other end of the slide rail 2, the air inlet 401 and the air outlet 402 of the hydrogen circulation pump 4 are respectively slidably inserted into the two sealing sleeves 605;

[0042] At this time, the driving cylinder 501 continues to drive the connecting bracket 502 to move. Since the placement rack 3 cannot move further, the pushing block 503 will squeeze the limit block 505 and make it slide upward. Eventually, the pushing block 503 can push open the limit block 505 and continue to move. At this time, the connecting bracket 502 will abut against the driven rod 702, driving the driven rod 702 to move. Since the guide rod two 706 on the driven rod 702 is slidably connected in the spiral guide groove 705, the movement of the driven rod 702 will drive the cylinder 704 to rotate. The cylinder 704 will drive the disc 608 to rotate after being transmitted by the pulley one 707, the synchronous belt 709 and the pulley two 708. Since the guide rod one 610 is slidably connected in the guiding groove 609, the clamping block 604 will contract inward under the drive of the disc 608, thereby firmly fixing the air inlet 401 and the air outlet 402 to the sealing sleeve 605 to avoid leakage;

[0043] After the clamping block 604 completes the clamping, the driving cylinder 501 continues to extend and stops after rotating the disc 608 by a certain angle, so that the arc-shaped rack 806 meshes with the driven gear 805. The driven gear 805 will drive the valve core of the three-way valve 801 to rotate, making the connecting pipe 606 communicate with the inlet pipe 802. Then open the two-way valve 803, and the supercharging air pump 804 outputs high-pressure gas. After the air pressure in the hydrogen circulation pump 4 and the air supply mechanism 8 reaches a certain height, the supercharging air pump 804 automatically stops. Then close the two-way valve 803, start the hydrogen circulation pump 4, drive the high-pressure gas in the air supply mechanism 8 to flow. After running for a period of time, observe whether the air pressure changes through the pressure indicator 9 to judge whether there is leakage when the hydrogen circulation pump 4 is running;

[0044] Make the driving cylinder 501 contract and stop after the arc-shaped rack 806 drives the driven gear 805 to rotate in the reverse direction and reset, so that the hydrogen circulation pump 4 communicates with the external environment through the three-way valve 801, and make the hydrogen circulation pump 4 continue to run. Observe whether the operation of the hydrogen circulation pump 4 is stable through the flow indicator 10. After the test is completed, stop the hydrogen circulation pump 4, make the driving cylinder 501 retract completely, drive the hydrogen circulation pump 4 to reset to the origin, and then the hydrogen circulation pump 4 can be replaced for further testing.

[0045] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A durability testing device for a hydrogen circulation pump, comprising a bottom plate (1), characterized in that: The bottom plate (1) is fixedly connected to two parallel slide rails (2), the slide rails (2) are slidably connected to a placement rack (3), a hydrogen circulation pump (4) is placed on the placement rack (3), and the hydrogen circulation pump (4) is provided with an air inlet (401) and an air outlet (402), the bottom plate (1) is also provided with a driving mechanism (5), the driving mechanism (5) is connected to the placement rack (3), the bottom plate (1) is also provided with a docking mechanism (6) and a transmission mechanism (7), the docking mechanism (6) is connected to the transmission mechanism (7), the docking mechanism (6) is connected to an air supply mechanism (8), and the air supply mechanism (8) is provided with a pressure indicator (9) and a flow indicator (10); The docking mechanism (6) comprises two support brackets (601), the two support brackets (601) are symmetrically fixedly connected to the bottom plate (1), a connecting plate (602) is fixedly connected to the support bracket (601), three sliding grooves (603) are evenly opened on the connecting plate (602), and clamping blocks (604) are slidably connected in the three sliding grooves (603), and a sealing sleeve (605) is fixedly connected to one side of the connecting plate (602). A connecting tube (606) is fixedly connected to the other side of the connecting disk (602), a connecting sleeve (607) is rotatably connected to the connecting tube (606), a circular disk (608) is fixedly connected to the connecting sleeve (607), three guide grooves (609) are evenly formed on the circular disk (608), and a guide rod one (610) is fixedly connected to the clamping block (604), and the three guide rods one (610) are respectively slidably connected in the three guide grooves (609).

2. The durability testing device for a hydrogen circulation pump according to claim 1, characterized in that: The driving mechanism (5) comprises a driving cylinder (501), wherein the driving cylinder (501) is fixedly connected to the bottom plate (1), and a connecting bracket (502) is fixedly connected to the movable end of the driving cylinder (501), and two pushing blocks (503) are symmetrically fixedly connected to the connecting bracket (502), and two fixed brackets (504) are symmetrically fixedly connected to the bottom end of the placement rack (3), and a limiting block (505) is slidably connected to the fixed bracket (504), and a spring 1 (506) is connected between the limiting block (505) and the fixed bracket (504), and the pushing block (503) is in contact with the limiting block (505) on the same side.

3. The durability testing device for a hydrogen circulation pump according to claim 1, characterized in that: The guide groove (609) is composed of a connected straight groove (6091) and an arc groove (6092). When the disc (608) rotates, the straight groove (6091) rotates to move the clamping block (604) along the slide groove (603), and the arc groove (6092) rotates to keep the clamping block (604) stationary.

4. The durability testing device for a hydrogen circulation pump according to claim 2, characterized in that: The transmission mechanism (7) comprises a connecting block (701), wherein the connecting block (701) is fixedly connected to the bottom plate (1), a driven rod (702) is slidably connected to the connecting block (701), a second spring (703) is connected between one end of the driven rod (702) and the connecting block (701), a cylinder (704) is rotatably connected to the connecting block (701), two spiral guide grooves (705) are evenly formed on the cylinder (704), a second guide rod (706) is fixedly connected to the other end of the driven rod (702), the second guide rod (706) is slidably connected to the two spiral guide grooves (705), a first pulley (707) is fixedly connected to the cylinder (704), two connecting sleeves (607) are fixedly connected to second pulleys (708), and a synchronous belt (709) is connected to the first pulley (707) and the two second pulleys (708).

5. The durability testing device for a hydrogen circulation pump according to claim 4, characterized in that: The connecting bracket (502) will abut against the driven rod (702) during the movement.

6. The durability testing device for a hydrogen circulation pump according to claim 1, characterized in that: The air supply mechanism (8) comprises two three-way valves (801), the two three-way valves (801) are symmetrically fixedly connected to two connecting pipes (606), an air intake pipe (802) is fixedly connected between the two three-way valves (801), a two-way valve (803) is fixedly connected to the air intake pipe (802), the two-way valve (803) is also connected to a booster air pump (804), the booster air pump (804) is fixedly connected to the bottom plate (1), a pressure indicator (9) is also provided on the air intake pipe (802), and a flow indicator (10) is also fixedly connected to the three-way valve (801) on one side of the air outlet (402).

7. The durability testing device for a hydrogen circulation pump according to claim 6, characterized in that: A driven gear (805) is fixedly connected to the valve core of the three-way valve (801), and an arc-shaped rack (806) is fixedly connected to the disk (608). When the disk (608) rotates, the arc-shaped rack (806) will mesh with the driven gear (805).

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