Mobile solid hydrogen storage system using anti-deformation bidirectional anti-vibration damping device

Abstract

The invention discloses a mobile solid hydrogen storage system using an anti-deformation bidirectional anti-vibration damping device. Wherein the water tank first panel and the water tank second panel are respectively sealed and fixed with a flange at one end of the water tank side wall through a sealing ring and a bolt; the second ends of the hydrogen storage tank bodies stacked in the radial direction are fixed to the second panel of the water tank; the first end of each hydrogen storage tank body is fixed with the hydrogen storage tank connecting base, and the first end of each buffer spring is fixed with the hydrogen storage tank connecting base through a spring welding column; the second ends of the buffer springs are connected with the first panel of the water tank in two staggered connection modes. In the transportation process of the solid hydrogen storage system, when vibration is caused by heat exchange hydrogen charging and discharging, the two connection modes can generate different pulling forces and pushing forces on the box body, the vibration in the transportation and operation process and box body deformation caused by water pressure change can be effectively reduced, and the leakage probability of the circulating water heat exchange system is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen storage equipment technology, specifically a mobile solid hydrogen storage system using a deformation-resistant bidirectional vibration damping device. Background Technology

[0002] Currently, hydrogen power generation is being used more and more widely in high-speed rail and ships. In hydrogen power generation systems for high-speed rail and ships, hydrogen users need to transport solid hydrogen storage systems by vehicle and ship. During transportation, the solid hydrogen storage systems also need to be circulated with hot and cold water to achieve the function of charging and discharging hydrogen, thereby supplying the power generation system with clean water. During transportation, the structural components inside the water tank (such as the hydrogen storage tank) will continuously exert pressure on the front and rear panels of the water tank (the first panel 8 and the second panel 10). At the same time, the vibration generated by the transportation vehicle itself will cause resonance and other problems to the liquid in the water tank where the hydrogen storage tank is placed. As a result, the front and rear panels of the hot water exchange tank in the hydrogen storage system often deform due to pressure changes, which leads to leakage of circulating water and seriously affects the system's performance and service life.

[0003] However, hydrogen storage alloys are inherently heavy. The bulk weight of typical AB (titanium iron) and AB2 (titanium manganese) hydrogen storage alloys used at room temperature exceeds 6 tons per cubic meter. Even when fabricated as alloy powder beds, the packing density is extremely high. Furthermore, for hydrogen safety reasons, the hydrogen storage tanks that hold the alloy powder beds and bear the pressure of hydrogen charging and discharging require hydrogen-resistant stainless steel with a certain pressure-bearing thickness. Additionally, because hydrogen storage alloys require significant heat absorption and release during charging and discharging, the storage tanks are often fabricated as multiple slender tubes housed within a stainless steel water tank capable of high-flow-rate water exchange. These design requirements undoubtedly significantly increase the weight of solid-state hydrogen storage systems.

[0004] Therefore, although the demand for mobile solid hydrogen storage systems is increasing, mobile vehicles usually need to balance the counterweight or center of gravity (such as trains, ships, and other transportation vehicles or forklifts, cranes, and other installation equipment). As a result, with current technology, it is difficult to distribute more weight to the thickness of the water tank or the reinforcement structure.

[0005] Therefore, in the design and fabrication of hydrogen storage systems, there is an urgent need for a new type of vibration-resistant device to reduce the damage to components such as water tanks in the hydrogen storage system caused by the resonant deformation generated during the hydrogen charging and discharging process during transportation and mobile operation. Summary of the Invention

[0006] To address the problems existing in the background technology, the present invention provides a mobile solid hydrogen storage system using a deformation-resistant bidirectional vibration damping device. The technical solution includes: a first water tank panel, a second water tank panel, a hydrogen storage tank body, a water tank sidewall, a gasket, a connecting ring, a water tank fixing base, a buffer spring, a hydrogen storage tank connecting base, and a spring welded column; wherein, the first water tank panel and the second water tank panel are respectively sealed and fixed to the flange at one end of the water tank sidewall by sealing rings and bolts; the second ends of a plurality of hydrogen storage tank bodies arranged radially are fixed to the second water tank panel;

[0007] The first end of each hydrogen storage tank is fixed to the hydrogen storage tank connecting base, and the first end of the buffer spring is fixed to the hydrogen storage tank connecting base through a spring welding column; the second ends of several buffer springs are connected to the first panel of the water tank through two staggered connection methods.

[0008] The two connection methods are: fixed connection at both ends of the spring and fixed connection at one end of the spring;

[0009] When the buffer spring is fixedly connected to the first panel of the water tank through one end of the spring, the second end of the buffer spring is fixed to the connecting ring through the spring welding post. The connecting ring is parallel to the first panel of the water tank. A washer is installed on the end face of the connecting ring, and a gap is maintained between the washer and the first panel of the water tank.

[0010] When the buffer spring is fixedly connected to the first panel of the water tank through the two ends of the spring, the second end of the buffer spring is fixed to the first end of the water tank fixing seat through the spring welding post, and the second end of the water tank fixing seat is fixedly connected to the first panel of the water tank.

[0011] The gap between the gasket and the first panel of the water tank should be 1mm-5mm.

[0012] The ratio of the length to the diameter of the hydrogen storage tank is N:1, where N≥25.

[0013] The dimensions of the hydrogen storage tank are: diameter 40~100mm, length 1000~2500mm.

[0014] The stacking configuration includes: layered stacking or staggered stacking.

[0015] The staggered arrangement is either a spaced-out arrangement or an encircling arrangement.

[0016] The arrangement of the alternating rows of tubes is such that one end of each row of springs is fixedly connected to a grid located at the center of the grid of four squares with fixed ends.

[0017] The encircling arrangement is such that each spring's one-end fixed connection device is surrounded by two-end fixed connection devices, and is not adjacent to any other spring's one-end fixed connection device.

[0018] 7. A mobile solid hydrogen storage system using a deformation-resistant bidirectional vibration damping device according to claim 1, characterized in that a fixed shaft (4) for guidance is respectively provided at both ends of the buffer spring (3).

[0019] 8. A mobile solid hydrogen storage system using a deformation-resistant bidirectional vibration damping device according to claim 1, characterized in that a plurality of water flow guide plates are provided at equal intervals between the second panel (10) and the first panel (8) of the water tank, and the water flow guide plates are provided with through holes that fit with the tank body (9) of the hydrogen storage tank; a water flow gap is provided between the water flow guide plate and one of the side walls of the water tank, thereby guiding the water flow in an S-shape in the water tank.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The buffer spring at one end of the hydrogen storage tank is connected to the water tank end plate by two staggered connection methods (fixed connection at both ends of the spring and fixed connection at one end of the spring). When the solid hydrogen storage system needs to exchange heat and charge / discharge hydrogen during transportation, which causes vibration, the two connection methods will generate different tensile and thrust forces on the tank body. This can effectively reduce the vibration during transportation and operation, as well as the deformation of the tank body caused by water pressure changes, and significantly reduce the probability of leakage of the circulating water heat exchange system.

[0022] 2. When the solid hydrogen storage system is operating statically in a non-transportation state, the double-ended connecting components in the vibration damping device will provide tension to the front and rear panels of the water tank (the first panel 8 and the second panel 10 of the water tank), reducing the convex deformation of the front and rear panels of the water tank, making it run more smoothly during the hydrogen absorption and desorption process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a mobile solid hydrogen storage system using a deformation-resistant bidirectional vibration damping device according to Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure in which the two ends of the spring are fixedly connected in an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure in an embodiment of the present invention where one end of the spring is fixedly connected.

[0026] Figure 4 This is a partial side view of Embodiment 1 of the present invention.

[0027] Figure 5 The maximum cyclic deformation curves of Embodiment 1 and Comparative Example 1 of the present invention are shown in the rear panel (first panel of the water tank).

[0028] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0029] Figure 7 The maximum cyclic deformation curves of the back panel (first panel of the water tank) in Embodiment 2 and Comparative Example 2 of the present invention are shown.

[0030] Among them, 1-washer, 2-connecting ring, 3-buffer spring, 4-fixed shaft, 5-hydrogen storage tank connecting base, 6-spring welding column, 7-water tank fixing seat, 8-water tank first panel, 9-hydrogen storage tank body, 10-water tank second panel. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] like Figures 1-5 The embodiment 1 of the present invention shown includes: a first panel 8 of a water tank, a second panel 10 of a water tank, a hydrogen storage tank body 9, a side wall of a water tank (not shown in the figure), a gasket 1, a connecting ring 2, a water tank fixing seat 7, a buffer spring 3, a hydrogen storage tank connecting base 5, and a spring welding column 6; wherein, the first panel 8 and the second panel 10 of the water tank are respectively sealed and fixed to the flange at one end of the side wall of the water tank by sealing rings and bolts; the second ends of a plurality of hydrogen storage tank bodies 9 arranged radially are fixed to the second panel 10 of the water tank;

[0033] The first end of each hydrogen storage tank body 9 is fixed to the hydrogen storage tank connecting base 5, and the first end of the buffer spring 3 is fixed to the hydrogen storage tank connecting base 5 through the spring welding column 6; the second ends of several buffer springs 3 are connected to the first panel 8 of the water tank through two staggered connection methods, forming a two-way anti-vibration damping device to prevent deformation.

[0034] The two connection methods are: fixed connection at both ends of the spring and fixed connection at one end of the spring;

[0035] When the buffer spring 3 is fixedly connected to the first panel 8 of the water tank via one end of the spring, as Figure 3 As shown, the second end of the buffer spring 3 is fixed to the connecting ring 2 by the spring welding post 6. The connecting ring 2 is parallel to the first panel 8 of the water tank. A washer 1 is installed on the end face of the connecting ring 2, and a gap is maintained between the washer 1 and the first panel 8 of the water tank.

[0036] When the buffer spring 3 is fixedly connected to the first panel 8 of the water tank through the two ends of the spring, as Figure 2As shown, the second end of the buffer spring 3 is fixed to the first end of the water tank fixing seat 7 via the spring welding post 6 (the spring does not deform after installation), and the second end of the water tank fixing seat 7 is fixedly connected to the first panel 8 of the water tank; when Embodiment 1 is working statically in a non-transportation state, the fixed connection of the two ends of the spring will provide tension to the first panel 8 and the second panel 10 of the water tank, reducing the convex deformation of the first panel 8 and the second panel 10 of the water tank, making it run more smoothly during the hydrogen absorption and desorption process; when Embodiment 1 is working dynamically during transportation, the hydrogen storage tubes of the hydrogen storage system will be affected by... The entire structure moves back and forth continuously due to vibrations during transport. In this process, the fixed connection at both ends of the spring provides tension to the first panel 8 and the second panel 10 of the water tank, while the fixed connection at one end of the spring creates a thrust on the first panel 8 and the second panel 10 of the water tank. The alternating arrangement of the two connection methods will disrupt the unified resonance of the multi-row tubes during transport, and at the same time create different forces on different parts of the first panel 8 and the second panel 10 of the water tank, reducing the concave and convex deformation of the first panel 8 and the second panel 10 of the water tank, making it run more smoothly during hydrogen absorption and desorption.

[0037] In this embodiment, the gap between the gasket 1 and the first panel 8 of the water tank is 1mm-5mm.

[0038] In this embodiment, the dimensions of the hydrogen storage tank 9 are: diameter 40~100mm, length 1000~2500mm, and the ratio of length to diameter is N:1, where N≥25. This size of hydrogen storage tank is used in mobile solid hydrogen storage systems because of its short heat transfer distance from the axis to the outer shell and fast heat transfer speed, but it is also more prone to resonance.

[0039] In this embodiment, multiple water flow guide plates are provided at equal intervals between the second panel 10 and the first panel 8 of the water tank. The water flow guide plates have through holes that fit with the tank body 9 of the hydrogen storage tank. A water flow gap is provided between the water flow guide plate and one of the side walls of the water tank, thereby guiding the water flow in an S-shape in the water tank for more complete heat exchange.

[0040] In this embodiment, fixed shafts 4 for guidance are respectively provided at both ends of the buffer spring 3.

[0041] Stacking arrangements include: layered stacking or staggered stacking (the method used in Example 1);

[0042] The staggered arrangement can be either a spaced-apart arrangement or an encircling arrangement.

[0043] The arrangement of the tubes is as follows: the fixed connection device at one end of each row of springs is located at the center of the grid of four squares with fixed connection devices at both ends (the method used in Example 1).

[0044] The encircling arrangement is as follows: each spring's one-end fixed connection device is surrounded by two-end fixed connection devices, and is not adjacent to any other spring's one-end fixed connection device.

[0045] The specific hydrogen charging and discharging experiment comparison process for the solid-state hydrogen storage system in Example 1 is as follows:

[0046] First, the mobile solid-state hydrogen storage system of Embodiment 1 of this invention, which uses a staggered stacking configuration and an alternating arrangement of spaced tubes, was tested within a solid-state hydrogen storage system. The experimental solid-state hydrogen storage system was first mounted on a diagnostic testing platform, and vibrations of 60 times / min with an amplitude of 5 mm were applied along the axial direction of the hydrogen storage tank. The hydrogen storage system was cooled with circulating water at room temperature (20°C) and charged with hydrogen until the pressure stabilized at 3 MPa. After the pressure stabilized, the system was heated with circulating water to 60°C and hydrogen was released until the pressure stabilized at 0.1 MPa, constituting one cycle. Strain test patches were installed on the first panel 8 and the second panel 10 of the hydrogen storage system's water tank, and the maximum deformation data of the front and rear panels after each cycle was measured.

[0047] Then, a comparative example 1, without the installation of buffer springs 3 (the two ends of the hydrogen storage tank 9 are directly fixed to the first panel 8 and the second panel 10 of the water tank), and using a staggered stacking configuration, was placed in the solid hydrogen storage system for testing. Vibration at a frequency of 60 times / min with an amplitude of 5 mm was applied along the axial direction of the hydrogen storage tank. The hydrogen storage system was cooled with circulating water at room temperature (20°C) and charged with hydrogen until the pressure stabilized at 3 MPa. After the pressure stabilized, the system was heated with circulating water to 60°C and hydrogen was released until the pressure stabilized at 0.1 MPa, constituting one cycle. Strain test patches were installed on the first panel 8 and the second panel 10 of the hydrogen storage system water tank, and the maximum deformation data of the front and rear panels after each cycle was measured.

[0048] The maximum deformation changes of the first panel 8 and the second panel 10 of the water tank after 20 cycles in Example 1 and Comparative Example 1 are as follows: Figure 5 As shown, the maximum deformation of the first panel 8 and the second panel 10 of the solid hydrogen storage system without bidirectional vibration damping device is 4221 μm after the first cycle and 20673 μm after 20 cycles; the maximum deformation of the first panel 8 and the second panel 10 of the solid hydrogen storage system with bidirectional vibration damping device is 2043 μm after the first cycle and 4589 μm after 20 cycles.

[0049] As shown in the results of Example 1 and Comparative Example 1, after the first cycle, the maximum deformation of the first panel 8 and the second panel 10 of the former's water tank is about twice that of the latter. After 20 cycles, the deformation of the former is about 4.5 times that of the latter. The former requires a significant increase in the wall thickness and flange of the hydrogen storage system water tank to ensure system safety and prevent cracks and leaks. However, after the second ends of several buffer springs 3 are connected to the first panel 8 of the water tank through two staggered connection methods, the two components will generate different tensile and thrust forces on the tank body when vibration occurs. This can effectively reduce the deformation of the tank body caused by vibration and water pressure changes during transportation and operation, and significantly reduce the leakage probability of the circulating water heat exchange system. This also makes the deformation trend decrease significantly with the number of cycles, effectively reducing the deformation of the tank body caused by vibration and water pressure changes during transportation and operation, and significantly reducing the leakage probability of the circulating water heat exchange system. In addition, it can also reduce the design wall thickness of the solid hydrogen storage system water tank and extend the service life of the system.

[0050] like Figure 6 The difference between Embodiment 2 and Embodiment 1 lies in the staggered arrangement and the density of the hydrogen storage tank 9.

[0051] In Example 2, the stacking method is staggered stacking;

[0052] In Example 2, the staggered arrangement is an encircling arrangement. Specifically, one end of each spring is fixedly connected to a central position of the six hexagonal fixed-connection devices arranged in a hexagonal pattern.

[0053] The specific hydrogen charging and discharging experiment comparison process for the solid-state hydrogen storage system in Example 2 is as follows:

[0054] First, the mobile solid-state hydrogen storage system of Embodiment 1 of this invention, which uses a staggered stacking arrangement and an enclosed staggered arrangement, was placed in the solid-state hydrogen storage system for testing: vibration at a frequency of 60 times / min and an amplitude of 5 mm was applied along the axial direction of the hydrogen storage tank. The hydrogen storage system was cooled with circulating water at room temperature (20°C) and charged with hydrogen until the pressure stabilized at 3 MPa. After the pressure stabilized, the circulating water was used to heat the system to 60°C and then the hydrogen was released until the pressure stabilized at 0.1 MPa, which constituted one cycle. Strain test patches were installed on the first panel 8 and the second panel 10 of the hydrogen storage system's water tank, and the maximum deformation data of the front and rear panels after each cycle was measured.

[0055] Then, Comparative Example 1, which does not have the buffer spring 3 installed (both ends of the hydrogen storage tank 9 are directly fixed to the first panel 8 and the second panel 10 of the water tank) and is arranged in a staggered, encircling configuration, was placed in the solid hydrogen storage system for testing. Vibration at a frequency of 60 times / min and an amplitude of 5 mm was applied along the axial direction of the hydrogen storage tank. The hydrogen storage system was cooled with circulating water at room temperature (20°C) and charged with hydrogen until the pressure stabilized at 3 MPa. After the pressure stabilized, the system was heated with circulating water to 60°C and hydrogen was released until the pressure stabilized at 0.1 MPa, constituting one cycle. Strain test patches were installed on the first panel 8 and the second panel 10 of the hydrogen storage system water tank, and the maximum deformation data of the front and rear panels after each cycle was measured.

[0056] The maximum deformation changes of the first panel 8 and the second panel 10 of the water tank after 20 cycles in Example 2 and Comparative Example 2 are as follows: Figure 7 As shown, the maximum deformation of the first panel 8 and the second panel 10 of the solid hydrogen storage system without bidirectional vibration damping device is 4743 μm after the first cycle and 23668 μm after 20 cycles; the maximum deformation of the first panel 8 and the second panel 10 of the solid hydrogen storage system with bidirectional vibration damping device is 2672 μm after the first cycle and 3749 μm after 20 cycles.

[0057] The results of Example 2 and Comparative Example 2 show that after the first cycle, the maximum deformation of the first panel 8 and the second panel 10 of the former's water tank is about 1.8 times that of the latter. After 20 cycles, the deformation of the former is about 6.3 times that of the latter. The former requires a significant increase in the wall thickness and flange of the hydrogen storage system water tank to ensure system safety and prevent cracks and leaks. However, after the second ends of several buffer springs 3 are connected to the first panel 8 of the water tank through two staggered connection methods, the two components will generate different tensile and thrust forces on the tank body when vibration occurs. This can effectively reduce the deformation of the tank body caused by vibration and water pressure changes during transportation and operation, and significantly reduce the leakage probability of the circulating water heat exchange system. The deformation trend with the number of cycles is significantly reduced, which can effectively reduce the deformation of the tank body caused by vibration and water pressure changes during transportation and operation, and significantly reduce the leakage probability of the circulating water heat exchange system. In addition, the design wall thickness of the solid hydrogen storage system water tank can be reduced, while extending the service life of the system.

Claims

1. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device, characterized in that, include: The water tank consists of a first panel (8), a second panel (10), a hydrogen storage tank body (9), a water tank sidewall, a gasket (1), a connecting ring (2), a buffer spring (3), a hydrogen storage tank connecting base (5), a water tank fixing seat (7), and a spring welding column (6). The first panel (8) and the second panel (10) are sealed and fixed to the flange at one end of the water tank sidewall by sealing rings and bolts, respectively. The second end of several hydrogen storage tank bodies (9) stacked radially is fixed to the second panel (10) of the water tank. The first end of each hydrogen storage tank body (9) is fixed to the hydrogen storage tank connecting base (5), and the first end of the buffer spring (3) is fixed to the hydrogen storage tank connecting base (5) through the spring welding column (6); the second ends of several buffer springs (3) are connected to the first panel (8) of the water tank through two staggered connection methods. The two connection methods are: fixed connection at both ends of the spring and fixed connection at one end of the spring; When the buffer spring (3) is fixedly connected to the first panel (8) of the water tank through one end of the spring, the second end of the buffer spring (3) is fixed to the connecting ring (2) through the spring welding column (6). The connecting ring (2) is parallel to the first panel (8) of the water tank. A washer (1) is installed on the end face of the connecting ring (2), and a gap is maintained between the washer (1) and the first panel (8) of the water tank. When the buffer spring (3) is fixedly connected to the first panel (8) of the water tank through the two ends of the spring, the second end of the buffer spring (3) is fixed to the first end of the water tank fixing seat (7) through the spring welding column (6), and the second end of the water tank fixing seat (7) is fixedly connected to the first panel (8) of the water tank.

2. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, The gap between the gasket (1) and the first panel (8) of the water tank is 1mm-5mm.

3. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, The ratio of the length to the diameter of the hydrogen storage tank (9) is N:1, where N≥25.

4. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, 2, or 3, characterized in that, The dimensions of the hydrogen storage tank body (9) are: diameter 40~100mm, length 1000~2500mm.

5. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, The stacking configuration includes: layered stacking or staggered stacking.

6. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, The staggered arrangement is either a spaced-out arrangement or an encircling arrangement. The arrangement of the alternating rows of tubes is such that one end of each row of springs is fixedly connected to a grid located at the center of the grid of four squares with fixed ends.

7. The enclosed arrangement is such that each spring's one-end fixed connection device is surrounded by two-end fixed connection devices, and is not adjacent to any other spring's one-end fixed connection device.

8. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, The buffer spring (3) has fixed shafts (4) for guidance at both ends.

9. A mobile solid-state hydrogen storage system using a deformation-resistant bidirectional vibration-damping device according to claim 1, characterized in that, Multiple water flow guide plates are provided at equal intervals between the second panel (10) and the first panel (8) of the water tank. The water flow guide plates have through holes that fit with the tank body (9) of the hydrogen storage tank. A water flow gap is provided between the water flow guide plate and one of the side walls of the water tank, so as to guide the water flow in an S-shape in the water tank.

Images