Durability testing device for hydrogen circulating pump

Abstract

The invention relates to the technical field of durability testing equipment, in particular to a durability testing device for a hydrogen circulating pump, which comprises a bottom plate, two parallel slide rails are fixedly connected to the bottom plate, a placement rack is slidably connected to the slide rails, and the hydrogen circulating pump is placed on the placement rack. A hydrogen circulating pump is arranged on the bottom plate, a gas inlet and a gas outlet are formed in the hydrogen circulating pump, a driving mechanism is further arranged on the bottom plate, the driving mechanism is connected with the placing frame, and a butt joint mechanism and a transmission mechanism are further arranged on the bottom plate. According to the device, through the arranged driving structure, after the hydrogen circulating pump on the placing frame is driven to move and the gas inlet and the gas outlet are in butt joint with the sealing sleeve, the clamping blocks can be driven to contract inwards through the transmission mechanism, so that the gas inlet and the gas outlet are firmly fixed with the sealing sleeve, and the sealing effect is achieved; and the hydrogen circulating pump and the gas supply mechanism can be quickly communicated through the docking mechanism, repeated communication is not needed, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of durability testing equipment, in particular to a durability testing device for a hydrogen circulation pump. Background Art

[0002] Hydrogen fuel cells need the assistance of other systems to drive vehicles, ships, and drones. The hydrogen fuel cell system consists of a fuel cell stack, a hydrogen supply circulation system, an air supply system, a water and heat management system, etc. Among them, the hydrogen supply 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 responsible for continuously providing high-purity hydrogen with a certain pressure and flow rate to the fuel cell stack to ensure the normal electrochemical reaction in the fuel cell stack.

[0003] Good stability of hydrogen supply is helpful for the durability of fuel cells. This is because the fuel cell vehicle stack requires the hydrogen pressure to be much lower than the outlet pressure, and improper pressure regulation can easily cause permanent damage to the proton exchange membrane, so the hydrogen pressure must be kept stable. The number one task of the hydrogen circulation pump in the hydrogen fuel cell system is to maintain stable hydrogen input. Therefore, it is necessary to test the durability of the hydrogen circulation pump.

[0004] The existing patent (Announcement No.: CN113027745A) discloses a hydrogen circulation pump durability test device, including an intake pipe, a flow detector, a pressure-suppressing tank a, a hydrogen circulation pump, and a pipeline a; the outlet of the flow detector is connected to the inlet of the pressure-suppressing tank a through a pipeline b, and the outlet of the pressure-suppressing 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 pipeline a through a pipeline, and the outlet of pipeline a is connected to the inlet pipe of the flow detector; the inlet pipe is provided with an intake pipe, and the intake pipe is provided with a valve a. However, the following problems were found in the actual test process: the ventilation pipeline of the device needs to be connected in sequence, which is relatively complicated, 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 in the above background technology that the connection between the hydrogen circulation pump and the ventilation pipeline is relatively complicated, resulting in low detection efficiency. To achieve the above purpose, the present invention provides the following technical solutions: A durability testing device for a hydrogen circulation pump comprises a base plate, two parallel slide rails are fixedly connected to the base plate, a placement rack is slidably connected to the slide rail, a hydrogen circulation pump is placed on the placement rack, an air inlet and an air outlet are arranged on the hydrogen circulation pump, a driving mechanism is also arranged on the base plate, the driving mechanism is connected to the placement rack, a docking mechanism and a transmission mechanism are also arranged on the base plate, the docking mechanism is connected to the transmission mechanism, an air supply mechanism is connected to the docking mechanism, and a pressure indicator and a flow indicator are arranged on the air supply mechanism.

[0006] Preferably, the driving mechanism includes a driving cylinder, which is fixedly connected to the base plate, and the movable end of the driving cylinder is fixedly connected to a connecting bracket, and two pushing blocks are symmetrically fixedly connected to the connecting bracket, and the bottom end of the placement rack is symmetrically fixedly connected to two fixed brackets, and a limiting block is slidably connected to the fixed bracket, and a spring is connected between the limiting block and the fixed bracket, and the pushing block is attached to the limiting block on the same side.

[0007] Preferably, the docking mechanism includes two supporting brackets, the two supporting brackets are symmetrically fixedly connected to the base plate, the supporting bracket is fixedly connected with a connecting disk, the connecting disk is evenly provided with three sliding grooves, the three sliding grooves are slidably connected with a clamping block, one side of the connecting disk is fixedly connected with a sealing sleeve, the other side of the connecting disk is fixedly connected with a connecting pipe, the connecting pipe is rotatably connected with a connecting sleeve, the connecting sleeve is fixedly connected with a circular disc, the circular disc is evenly provided with three guide grooves, the clamping block is fixedly connected with a guide rod one, and the three guide rods one are slidably connected in the three guide grooves respectively.

[0008] Preferably, the guide groove is composed of a connected straight groove and an arc groove. When the disc rotates, the straight groove rotates to move the clamping block along the slide groove, and the arc groove rotates to keep the clamping block stationary.

[0009] Preferably, the transmission mechanism includes a connecting block, the connecting block is fixedly connected to the base plate, a driven rod is slidably connected to the connecting block, a spring 2 is connected between one end of the driven rod and the connecting block, a cylinder is also rotatably connected to the connecting block, two spiral guide grooves are evenly opened on the cylinder, a guide rod 2 is fixedly connected to the other end of the driven rod, the guide rod 2 is slidably connected to the two spiral guide grooves, a pulley 1 is fixedly connected to the cylinder, the two connecting sleeves are fixedly connected to pulleys 2, and a synchronous belt is connected to the pulley 1 and the two pulleys 2.

[0010] Preferably, the connecting bracket abuts against the driven rod during movement.

[0011] Preferably, the air supply mechanism includes two three-way valves, the two three-way valves are symmetrically fixedly connected to two connecting pipes, an air intake pipe is fixedly connected between the two three-way valves, a two-way valve is fixedly connected to the air intake pipe, the two-way valve is also connected to a boost air pump, the boost air pump is fixedly connected to a base plate, a pressure indicator is also provided on the air intake pipe, and a flow indicator is also fixedly connected to the three-way valve on one side of the air outlet.

[0012] Preferably, a driven gear is fixedly connected to the valve core of the three-way valve, and an arc-shaped rack is fixedly connected to the disc. During the rotation of the disc, the arc-shaped rack will mesh with the driven gear.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the driving structure is set up to drive the hydrogen circulation pump on the placement rack to move, so that the air inlet and the air outlet are docked with the sealing sleeve, and then the clamping block can be driven to retract inward through the transmission mechanism to firmly fix the air inlet and the air outlet to the sealing sleeve, thereby achieving a sealing effect, so that the hydrogen circulation pump and the gas supply mechanism can be quickly connected through the docking mechanism without multiple connections, which is more convenient to use.

[0014] 2. In the present invention, after the clamping block is driven to shrink, the disc is arranged to drive the valve core of the three-way valve to rotate through the arc-shaped rack and the driven gear, so that the connecting pipe is connected with the air inlet pipe, so that high-pressure gas can be introduced into the hydrogen circulation pump, so that the hydrogen circulation pump can operate in a high-pressure gas environment. By observing the pressure indicator, it can be determined whether there is a problem with the sealing of the hydrogen circulation pump during operation.

[0015] 3. In the present invention, after the hydrogen circulation pump has been running for a certain period of time in a high-pressure gas environment, the valve core of the three-way valve is driven to rotate again by driving the cylinder, so that the air inlet and the air outlet are connected to the external environment. At this time, by observing the flow indicator, it is possible to determine whether there is a problem with the internal structure of the hydrogen circulation pump after it has been running in a high-pressure gas environment, thereby achieving the effect of detecting the durability of the hydrogen circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The structure of the driving mechanism in the present invention is shown in FIG. Figure 1 ; Figure 3 The structure of the driving mechanism in the present invention is shown in FIG. Figure 2 ; Figure 4 The structure diagram of the docking mechanism and the transmission mechanism in the present invention is shown in FIG. Figure 1 ; Figure 5The structure diagram of the docking mechanism and the transmission mechanism in the present invention is shown in FIG. Figure 2 ; Figure 6 It is a schematic diagram of the connection structure between the disc and the pulley 1 in the present invention; Figure 7 The structure of the gas supply mechanism in the present invention is shown in FIG. Figure 1 ; Figure 8 The structure of the gas supply mechanism in the present invention is shown in FIG. Figure 2 .

[0017] In the figure: 1, bottom plate; 2, slide rail; 3, placement rack; 4, hydrogen circulation pump; 401, air inlet; 402, air outlet; 5, driving mechanism; 501, driving cylinder; 502, connecting bracket; 503, pushing block; 504, fixing bracket; 505, limiting block; 506, spring 1; 6, docking mechanism; 601, supporting bracket; 602, connecting plate; 603, slide groove; 604, clamping block; 605, sealing sleeve; 606, connecting pipe; 607, connecting sleeve; 608, disc; 609, guide groove ;6091, straight groove; 6092, arc groove; 610, guide rod one; 7, transmission mechanism; 701, connecting block; 702, driven rod; 703, spring two; 704, cylinder; 705, spiral guide groove; 706, guide rod two; 707, pulley one; 708, pulley two; 709, synchronous belt; 8, air supply mechanism; 801, three-way valve; 802, intake pipe; 803, two-way valve; 804, booster air pump; 805, driven gear; 806, arc rack; 9, pressure indicator; 10, flow indicator. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 8 , the present invention provides a technical solution: 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.

[0020] 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 .

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In this embodiment, 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.

[0025] In this embodiment, the transmission mechanism 7 includes a connecting block 701, which is fixedly connected to the base plate 1, and a driven rod 702 is slidably connected to the connecting block 701, a spring 2 703 is connected between one end of the driven rod 702 and the connecting block 701, and a cylinder 704 is also rotatably connected to the connecting block 701, and two spiral guide grooves 705 are evenly opened on the cylinder 704, and a guide rod 2 706 is fixedly connected to the other end of the driven rod 702, and the guide rod 2 706 is slidably connected to the two spiral guide grooves 705, and a pulley 1 707 is fixedly connected to the cylinder 704, and the two connecting sleeves 607 are fixedly connected to pulley 2 708, and a synchronous belt 709 is connected to the pulley 1 707 and the two pulleys 2 708.

[0026] In this embodiment, the connecting bracket 502 abuts against the driven rod 702 during the movement.

[0027] In this embodiment, the air supply mechanism 8 includes two three-way valves 801, and the two three-way valves 801 are symmetrically fixedly connected to the 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 boost air pump 804, and the boost air pump 804 is fixedly connected to the base 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 the side of the air outlet 402.

[0028] In this embodiment, after the booster air pump 804 is started, it can absorb external gas and discharge it after pressurization. An air pressure sensor is provided at the air outlet of the booster air pump 804. When the air pressure detected by the air pressure sensor reaches a certain value, the booster air pump 804 will stop outputting high-pressure gas. When the air pressure value detected by the air pressure sensor decreases, the booster air pump 804 will output high-pressure gas again.

[0029] In this embodiment, 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 meshes with the driven gear 805 .

[0030] When the durability test device of this hydrogen circulation pump is working, the working process is as follows: 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 push block 503 to move, and the push 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 also slidably inserted into the two sealing sleeves 605 respectively; At this time, the driving cylinder 501 continues to drive the connecting bracket 502 to move. Since the placement rack 3 cannot move any further, the pushing block 503 will squeeze the limiting block 505 and make it slide upward, and finally the pushing block 503 can squeeze the limiting block 505 and continue to move. At this time, the connecting bracket 502 will abut against the driven rod 702, pushing the driven rod 702 to move. Since the guide rod 2 706 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 driven by the pulley 1 707, the synchronous belt 709 and the pulley 2 708. Since the guide rod 1 610 is slidably connected in the guide groove 609, the clamping block 604 will shrink inwardly 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 prevent leakage. After the clamping block 604 completes the clamping, the driving cylinder 501 continues to extend and stops after the disc 608 continues to rotate a certain angle, so that the arc-shaped rack 806 and the driven gear 805 are meshed, and the driven gear 805 drives the valve core of the three-way valve 801 to rotate, so that the connecting pipe 606 is connected with the intake pipe 802, and then the two-way valve 803 is opened, and the booster 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 booster pump 804 automatically stops, and then the two-way valve 803 is closed, and the hydrogen circulation pump 4 is started, driving the high-pressure gas in the air supply mechanism 8 to flow. After running for a period of time, the pressure indicator 9 is used to observe whether the air pressure changes, so as to judge whether the hydrogen circulation pump 4 leaks during operation; The driving cylinder 501 is retracted, and the arc-shaped rack 806 drives the driven gear 805 to rotate in the opposite direction and reset, and then the hydrogen circulation pump 4 is connected to the external environment through the three-way valve 801, and the hydrogen circulation pump 4 continues to run. Whether the operation of the hydrogen circulation pump 4 is stable is judged by observing the flow indicator 10. After the test is completed, the hydrogen circulation pump 4 is stopped, and the driving cylinder 501 is completely retracted, driving the hydrogen circulation pump 4 to reset to the origin, and then the hydrogen circulation pump 4 can be replaced and tested again.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions 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 may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached 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), and 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), and 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).

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 2, characterized in that: 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).

4. The durability testing device for a hydrogen circulation pump according to claim 3, 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.

5. The durability testing device for a hydrogen circulation pump according to claim 4, 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).

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

7. The durability testing device for a hydrogen circulation pump according to claim 5, 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).

8. The durability testing device for a hydrogen circulation pump according to claim 7, 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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