Vehicle-mounted liquid hydrogen tank anti-shaking device

Abstract

The invention discloses a vehicle-mounted liquid hydrogen tank anti-shaking device which comprises a vehicle-mounted liquid hydrogen tank and an anti-shaking partition plate fixing guide rail located in the vehicle-mounted liquid hydrogen tank, the anti-shaking partition plate fixing guide rail is connected to the inner wall of the vehicle-mounted liquid hydrogen tank, and the anti-shaking partition plate fixing guide rail coincides with the vertical center face of the vehicle-mounted liquid hydrogen tank. An anti-shaking partition plate is connected to the anti-shaking partition plate fixing guide rail in a sliding mode and can float up and down along with the liquid level of liquid in the vehicle-mounted liquid hydrogen tank, and limiting structures are arranged on the upper portion and the lower portion of the anti-shaking partition plate and installed on the anti-shaking partition plate fixing guide rail. According to the vehicle-mounted liquid hydrogen tank, the guide rails are fixed through the anti-shaking partition plates, so that the anti-shaking partition plates can float up and down along with changes of the liquid hydrogen reserves in the liquid hydrogen filling process or the using process of the vehicle-mounted liquid hydrogen tank, and the anti-shaking requirements of the vehicle-mounted liquid hydrogen tank under different liquid hydrogen reserves can be met; and meanwhile, other built-in components are not needed, and the self-locking effect of the anti-shaking partition plate can be achieved through the overturning force of shaking of the liquid hydrogen when the vehicle-mounted liquid hydrogen tank shakes in the running process.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid hydrogen, and in particular to an anti-sway device for a vehicle-mounted liquid hydrogen tank. Background Art

[0002] Liquid hydrogen has the advantages of high density and high energy density, but it is also volatile and highly flammable. Therefore, strict safety measures must be taken when transporting and storing liquid hydrogen to prevent accidents such as leakage and fire. With the rapid development of hydrogen energy vehicles, the safety and stability of on-board liquid hydrogen tanks have gradually received attention. During vehicle driving, especially in complex road conditions such as mountainous areas and cities, on-board liquid hydrogen tanks will be affected by forces in different directions, which can easily cause the liquid to slosh.

[0003] If the liquid hydrogen in the liquid hydrogen tank shakes violently, on the one hand, the evaporation of liquid hydrogen will increase, resulting in increased pressure, which may easily lead to safety hazards, such as rupture or leakage of the tank; on the other hand, the lateral shaking of liquid hydrogen when the liquid hydrogen tanker turns may easily cause the center of gravity of the vehicle to shift, resulting in accidents such as rollover. With the gradual popularization of hydrogen fuel vehicles, the research and application of anti-sway technology for liquid hydrogen tanks will become increasingly important. Existing anti-sway technology mainly focuses on the design of the internal structure of liquid hydrogen tanks, such as reducing the sway of liquid in the tank by designing special baffles or bends and other anti-sway devices inside the liquid hydrogen tank. However, the existing baffles or bends are all fixed in design, which makes it difficult to meet the needs of effective anti-sway under different filling volumes. Therefore, the development of an effective anti-sway device has become an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and propose a vehicle-mounted liquid hydrogen tank anti-sway device, which uses a baffle that can float up and down within a certain range and uneven force on the baffle when liquid hydrogen sways to achieve real-time anti-sway under different liquid hydrogen filling amounts. The purpose is to reduce the sway of the vehicle-mounted liquid hydrogen tank during driving through a special structural design to improve safety and stability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A vehicle-mounted liquid hydrogen tank anti-sway device comprises a vehicle-mounted liquid hydrogen tank and an anti-sway baffle fixing rail located therein, wherein the anti-sway baffle fixing rail is connected to the inner wall of the vehicle-mounted liquid hydrogen tank, and the anti-sway baffle fixing rail coincides with the vertical center plane of the vehicle-mounted liquid hydrogen tank, an anti-sway baffle is slidably connected to the anti-sway baffle fixing rail, and the anti-sway baffle can float up and down with the liquid level in the vehicle-mounted liquid hydrogen tank, and limiting structures are arranged above and below the anti-sway baffle, and the limiting structures are installed on the anti-sway baffle fixing rail.

[0006] Preferably, the limiting structure includes an anti-sway partition fixed guide rail baffle plate, the anti-sway partition fixed guide rail baffle plate located below is fixed to the anti-sway partition fixed guide rail, and the anti-sway partition fixed guide rail baffle plate located above is detachable from the anti-sway partition fixed guide rail.

[0007] Preferably, the left and right parts of the anti-sway partition are symmetrically arranged about the anti-sway partition fixing rail.

[0008] Preferably, the anti-sway partition is provided with a sliding opening corresponding to the fixing guide rail of the anti-sway partition, and the sliding opening and the fixing guide rail of the anti-sway partition are clearance-matched.

[0009] Preferably, the anti-sway partition fixing rail is fixed to the anti-sway partition fixing rail baffle above by bolts.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention utilizes the anti-sway baffle to fix the guide rail, so that during the liquid hydrogen filling process or use of the on-board liquid hydrogen tank, as the liquid hydrogen storage amount changes, the anti-sway baffle can float up and down, and can meet the anti-sway requirements of the on-board liquid hydrogen tank under different liquid hydrogen storage amounts; at the same time, without relying on other built-in components, the anti-sway baffle can achieve a self-locking effect when the on-board liquid hydrogen tank shakes during driving by relying on the overturning force of the liquid hydrogen shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0012] Figure 1 The present invention is a structural schematic diagram of a vehicle-mounted liquid hydrogen tank anti-sway device. In the figure: a vehicle-mounted liquid hydrogen tank 1, an anti-sway partition fixing rail 2, an anti-sway partition fixing rail baffle 3, and an anti-sway partition 4.

[0013] Figure 2 This is a three-dimensional example diagram of an anti-sway device for a vehicle-mounted liquid hydrogen tank of the present invention. It should be noted that this three-dimensional structure example diagram is only for a specific vehicle-mounted liquid hydrogen tank, and its aspect ratio and other data are not specific.

[0014] Figure 3 It is a schematic diagram of an anti-sway device for a vehicle-mounted liquid hydrogen tank of the present invention when not filled with liquid hydrogen.

[0015] Figure 4 It is a schematic diagram of the liquid level of an anti-sway device for a vehicle-mounted liquid hydrogen tank of the present invention when the liquid hydrogen filling amount is 50%.

[0016] Figure 5 It is a schematic diagram of liquid surface swaying when the on-board liquid hydrogen tank of a liquid hydrogen tank truck turns left and an anti-sway device for a liquid hydrogen tank on board of the present invention sways.

[0017] Figure 6 This is a force analysis diagram of an anti-sway partition of a vehicle-mounted liquid hydrogen tank anti-sway device of the present invention when the vehicle-mounted liquid hydrogen tank sways.

[0018] In the figure: on-board liquid hydrogen tank 1, anti-sway bulkhead fixing rail 2, anti-sway bulkhead fixing rail baffle 3, anti-sway bulkhead 4. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-6 A vehicle-mounted liquid hydrogen tank anti-sway device comprises a vehicle-mounted liquid hydrogen tank 1 and an anti-sway baffle fixing guide rail 2 located therein, the anti-sway baffle fixing guide rail 2 is connected to the inner wall of the vehicle-mounted liquid hydrogen tank 1, and can be fixed by bolt connection or direct welding, and the anti-sway baffle fixing guide rail 2 coincides with the vertical center plane of the vehicle-mounted liquid hydrogen tank 1, an anti-sway baffle 4 is slidably connected to the anti-sway baffle fixing guide rail 2, and the anti-sway baffle 4 can float up and down with the liquid level of the liquid in the vehicle-mounted liquid hydrogen tank 1, and the anti-sway baffle 4 is provided with limiting structures above and below, and the limiting structures are installed on the anti-sway baffle fixing guide rail 2.

[0021] In this embodiment, the limiting structure includes an anti-sway partition fixed guide rail baffle plate 3, the anti-sway partition fixed guide rail baffle plate 3 located below is fixed to the anti-sway partition fixed guide rail 2, and the anti-sway partition fixed guide rail baffle plate 3 located above is detachable from the anti-sway partition fixed guide rail 2.

[0022] In this embodiment, the left and right parts of the anti-sway baffle 4 are symmetrically arranged about the anti-sway baffle fixing rail 2. A sliding mouth corresponding to the anti-sway baffle fixing rail 2 is arranged on the anti-sway baffle 4, and the sliding mouth and the anti-sway baffle fixing rail 2 are clearance-matched, ensuring that the anti-sway baffle 4 can float up and down during the liquid hydrogen filling process and use.

[0023] In this embodiment, the anti-sway partition fixing rail 2 is fixed to the anti-sway partition fixing rail baffle 3 above by bolts. When the anti-sway partition 4 is to be repaired or replaced, it is only necessary to remove the anti-sway partition fixing rail baffle 3 and take out the anti-sway partition 4 for repair or replacement.

[0024] 1) Charging process Figure 3This is the initial state of the on-board liquid hydrogen tank before liquid hydrogen is filled. The anti-sway baffle 4 is located on the non-removable baffle of the anti-sway baffle fixed guide rail 2 due to gravity. Assuming that the liquid hydrogen filling amount of the on-board liquid hydrogen tank 1 is 50%, as the liquid hydrogen filling amount increases, since the anti-sway baffle 4 is made of a high-strength material with a density less than that of liquid hydrogen, the anti-sway baffle 4 gradually rises as the liquid level rises. For the on-board liquid hydrogen tank 1, the filling port of liquid hydrogen is generally at the bottom or lower part of the on-board liquid hydrogen tank 1. During the liquid hydrogen filling process, the anti-sway baffle 4 will not shake violently. When 50% of the liquid hydrogen filling is completed, Figure 4 shown.

[0025] 2) Anti-sway process When the vehicle encounters bumps during driving, especially when turning, the liquid hydrogen in the on-board liquid hydrogen tank body 1 will shake and tilt due to the centrifugal force.

[0026] Taking the left turn of a liquid hydrogen tanker as an example, since the anti-sway baffle 4 is not tightly fitted with the anti-sway baffle fixed rail 2, the anti-sway baffle 4 tilts under the action of the unbalanced force, and the tilt angle is α. The liquid hydrogen on the left side of the anti-sway baffle fixed rail 2 in the on-board liquid hydrogen tank 1 moves toward the vertical center plane of the tank, and the liquid hydrogen on the right side of the anti-sway baffle fixed rail 2 in the on-board liquid hydrogen tank 1 moves toward the tank wall. Figure 5 shown.

[0027] Compared with the liquid hydrogen on the left side of the anti-sway baffle fixed guide rail 2, the relative movement of the liquid hydrogen on the right side of the anti-sway baffle fixed guide rail 2 is more violent. Therefore, the upward overturning force on the anti-sway baffle 4 caused by the swaying liquid hydrogen on the right side is more obvious, and the overturning force on the anti-sway baffle 3 is obviously concentrated on the right side of the anti-sway baffle fixed guide rail 2.

[0028] Figure 6 This is the force analysis diagram of the anti-sway partition when the on-board liquid hydrogen tank shakes. l 、F r are the overturning forces on the anti-sway partition 4 caused by the swaying of liquid hydrogen on the left and right sides of the anti-sway partition fixed guide rail 2, and F lN 、F rN are the supporting forces on the anti-sway partition 4 generated by the contact points on the left and right sides of the anti-sway partition fixed guide rail 2, and f l 、f r They are respectively the friction forces on the anti-sway partition 4 generated by the contact points on the left and right sides of the anti-sway partition 4 and the anti-sway partition fixing guide rail 2.

[0029] The resultant moment at the center of mass of the anti-sway partition 4 is obtained as follows: l 、F r The force arm is much larger than F lN 、F rN、 f l 、f rThe moment arm can be neglected, so the resultant moment is , and because Therefore, under this working condition, the resultant torque keeps the anti-sway partition 4 tilted to achieve self-locking.

[0030] 3) Stable process When the vehicle gradually runs steadily, the sway amplitude of the liquid level in the on-board liquid hydrogen tank gradually decreases, which will make the anti-sway baffle 4 gradually fit the liquid surface, and the sway amplitude gradually decreases. The decrease in the sway amplitude of the anti-sway baffle 4 positively stimulates the liquid surface to reduce its sway amplitude. The reduced sway of the liquid surface and the reduced sway of the anti-sway baffle 4 form positive excitation, accelerating the stability of the liquid surface and the anti-sway baffle 4.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle-mounted liquid hydrogen tank anti-sway device, comprising a vehicle-mounted liquid hydrogen tank (1) and an anti-sway partition fixing rail (2) located therein, characterized in that: The anti-sway baffle fixing rail (2) is connected to the inner wall of the on-board liquid hydrogen tank (1), and the anti-sway baffle fixing rail (2) coincides with the vertical center plane of the on-board liquid hydrogen tank (1). The anti-sway baffle (4) is slidably connected to the anti-sway baffle fixing rail (2), and the anti-sway baffle (4) can float up and down with the liquid level of the liquid in the on-board liquid hydrogen tank (1). The anti-sway baffle (4) is provided with limit structures at the top and bottom, and the limit structures are installed on the anti-sway baffle fixing rail (2).

2. The vehicle-mounted liquid hydrogen tank anti-sway device according to claim 1 is characterized in that: The limiting structure comprises an anti-sway partition fixed guide rail baffle (3), the anti-sway partition fixed guide rail baffle (3) located below is fixedly arranged with the anti-sway partition fixed guide rail (2), and the anti-sway partition fixed guide rail baffle (3) located above is detachably arranged with the anti-sway partition fixed guide rail (2).

3. The vehicle-mounted liquid hydrogen tank anti-sway device according to claim 2 is characterized in that: The left and right parts of the anti-sway partition (4) are symmetrically arranged with respect to the anti-sway partition fixing guide rail (2).

4. The vehicle-mounted liquid hydrogen tank anti-sway device according to claim 3 is characterized in that: The anti-sway partition (4) is provided with a sliding opening corresponding to the anti-sway partition fixing guide rail (2), and the sliding opening and the anti-sway partition fixing guide rail (2) are clearance-matched.

5. The vehicle-mounted liquid hydrogen tank anti-sway device according to claim 4 is characterized in that: The anti-sway partition fixing guide rail (2) and the upper anti-sway partition fixing guide rail baffle (3) are fixed by bolts.

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