Supporting structure for liquid hydrogen tank and liquid hydrogen tank

Abstract

The utility model discloses a supporting structure for a liquid hydrogen tank and the liquid hydrogen tank, and belongs to the technical field of liquid hydrogen, the supporting structure is suitable for being arranged between an inner tank and an outer tank of the liquid hydrogen tank, the supporting structure comprises a connecting seat, a supporting piece and an elastic piece, the connecting seat is suitable for being fixedly connected with the outer tank, and the connecting seat is provided with a mounting cavity; a limiting hole is formed in the top wall of the mounting cavity, the supporting piece movably penetrates through the limiting hole, the supporting piece is provided with a connecting end in the mounting cavity and a supporting end outside the mounting cavity, and the supporting end is suitable for abutting against the inner tank. According to the supporting structure, the elastic piece applies the elastic force close to the top wall of the mounting cavity to the connecting end of the supporting piece, so that the pressure of the supporting end of the supporting piece on the inner tank is increased, the supporting effect of the supporting piece on the inner tank is improved, and meanwhile, the supporting end supports the inner tank in an abutting mode; the influence of deformation of an inner tank under thermal stress on a supporting structure is reduced, and the stability and reliability of the supporting structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen, and more specifically, to a support structure and a liquid hydrogen tank for a liquid hydrogen tank. Background Art

[0002] The liquid hydrogen tank consists of an inner tank, an outer tank, pipelines, a limited filling structure, a support structure, etc. The support structure is located between the inner tank and the outer tank. The inner tank of the liquid hydrogen tank stores liquid hydrogen, and liquid hydrogen requires a relatively low storage temperature. Usually, a vacuum is drawn between the inner tank and the outer tank of the liquid hydrogen tank to isolate the transfer of external heat to the inner tank. At the same time, a support structure is also required to fix the inner tank.

[0003] In the related art, the support structure usually rigidly connects the inner tank and the outer tank by welding or other means. However, the shape of the inner tank will change under the action of thermal stress, resulting in the support structure being easily damaged by force and having poor reliability. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the above technical problems in the prior art to some extent. For this reason, the utility model provides a support structure for a liquid hydrogen tank, which can reduce the influence of the deformation of the inner tank under thermal stress on the support structure.

[0005] The utility model also provides a liquid hydrogen tank with the above support structure.

[0006] According to the support structure for a liquid hydrogen tank of an embodiment of the utility model, the support structure is adapted to be arranged between the inner tank and the outer tank of the liquid hydrogen tank. The support structure includes: a connection seat, which is adapted to be fixedly connected to the outer tank. The connection seat has an installation cavity, and a limit hole is provided on the top wall of the installation cavity; a support member, which is movably inserted through the limit hole. The support member has a connection end inside the installation cavity and a support end outside the installation cavity, and the support end is adapted to abut against the inner tank; an elastic member, which is arranged inside the installation cavity and is respectively connected to the connection end and the connection seat. The elastic member is used to apply an elastic force to the connection end in the direction close to the top wall.

[0007] According to the support structure of an embodiment of the utility model, the support structure is arranged between the inner tank and the outer tank of the liquid hydrogen tank. The support member of the support structure can be connected to the connection seat through the elastic member. The support member is movably inserted through the top wall of the installation cavity. The elastic member applies an elastic force to the connection end of the support member in the direction close to the top wall of the installation cavity to increase the pressure of the support end of the support member on the inner tank and improve the support effect of the support member on the inner tank. At the same time, the support end supports the inner tank by abutting, so as to reduce the influence of the deformation of the inner tank under thermal stress on the support structure and improve the stability and reliability of the support structure.

[0008] According to some embodiments of the present utility model, the support member is configured as a hemispherical shell, the top end of the outer wall of the hemispherical shell is the support end, and the annular bottom wall connecting its inner and outer walls is the connection end.

[0009] According to some embodiments of the present utility model, the outer diameter of the hemispherical shell is greater than the aperture diameter of the limiting hole.

[0010] According to some embodiments of the present utility model, the elastic member is configured as a disc spring; the connecting seat forms a guiding column in the installation cavity, and the disc spring is sleeved on the guiding column.

[0011] According to some embodiments of the present utility model, the support structure further includes: a support plate, and the support plate includes: an annular connecting portion, in the axial direction of the limiting hole, the annular connecting portion is connected between the connection end and the disc spring; an annular guiding portion, the annular guiding portion is connected to the annular connecting portion, and in the axial direction of the limiting hole, the annular guiding portion is adapted to be in guiding cooperation with the side wall of the installation cavity.

[0012] According to some embodiments of the present utility model, the thermal conductivity of at least one of the support member, the elastic member, and the support plate is less than or equal to 0.256 W / (m·K).

[0013] According to some embodiments of the present utility model, the connecting seat includes: a connecting groove body and a connecting top cover, the connecting groove body and the connecting top cover are connected and jointly define the installation cavity, and the connecting top cover is provided with the limiting hole.

[0014] According to another embodiment of the present utility model, a liquid hydrogen tank includes: an inner tank and an outer tank, the inner tank is disposed inside the outer tank; a support assembly, the support assembly includes: the above-mentioned support structure for the liquid hydrogen tank, the support structure is disposed between the inner tank and the outer tank, and the connecting seat is fixedly connected to the outer tank, and the support end abuts against the inner tank.

[0015] According to the embodiment of the present utility model, the support structure of the liquid hydrogen tank is disposed between the inner tank and the outer tank of the liquid hydrogen tank. The support member of the support structure can be connected to the connecting seat through the elastic member. The support member movably passes through the top wall of the installation cavity. The elastic member applies an elastic force to the connection end of the support member in the direction close to the top wall of the installation cavity to increase the pressure of the support end of the support member on the inner tank and improve the support effect of the support member on the inner tank. At the same time, the support end supports the inner tank by abutting, so as to reduce the influence of the deformation of the inner tank under thermal stress on the support structure and the outer tank, and improve the stability and reliability of the liquid hydrogen tank.

[0016] According to some embodiments of the present utility model, the support assembly includes N support structures, N≥3, and the N support structures are arranged at intervals along the circumferential direction of the inner tank.

[0017] According to some embodiments of the present utility model, the number of the support assemblies is multiple, and the multiple support assemblies are arranged at intervals along the axial direction of the inner tank.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0019] Figure 1 is a schematic diagram of a support structure according to an embodiment of the present utility model;

[0020] Figure 2 is an exploded view of a support structure according to an embodiment of the present utility model;

[0021] Figure 3 is a sectional view of a support structure according to an embodiment of the present utility model;

[0022] Figure 4 is a sectional view of a liquid hydrogen tank according to an embodiment of the present utility model.

[0023] Reference Numerals:

[0024] Connection seat 1; Connection groove body 11; Installation cavity 111; Guide post 112; Connection top cover 12; Limit hole 121;

[0025] Support member 2; Hemispherical shell 2a; Connection end 21; Support end 22;

[0026] Elastic member 3; Disc spring 3a;

[0027] Support plate 4; Annular connection portion 41; Annular guide portion 42;

[0028] Support structure 10; Support assembly 100; Inner tank 200; Outer tank 300; Liquid hydrogen tank 1000. Detailed Description of the Embodiments

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The following will describe in detail the support structure 10 and the liquid hydrogen tank 1000 having the same according to an embodiment of the present utility model with reference to the drawings.

[0034] Refer to Figures 1-4 As shown, the support structure 10 according to an embodiment of the present utility model is for the liquid hydrogen tank 1000. The support structure 10 is adapted to be disposed between the inner tank 200 and the outer tank 300 of the liquid hydrogen tank 1000. The support structure 10 includes: a connection seat 1, a support member 2, and an elastic member 3. The connection seat 1 is adapted to be fixedly connected to the outer tank 300. The connection seat 1 has an installation cavity 111. A limit hole 121 is formed in the top wall of the installation cavity 111. The support member 2 is movably inserted through the limit hole 121. The support member 2 has a connection end 21 inside the installation cavity 111 and a support end 22 outside the installation cavity 111. The support end 22 is adapted to abut against the inner tank 200. The elastic member 3 is disposed inside the installation cavity 111. The elastic member 3 is respectively connected to the connection end 21 and the connection seat 1. The elastic member 3 is used to apply an elastic force to the connection end 21 in the direction close to the top wall.

[0035] Among them, the inner tank 200 of the liquid hydrogen tank 1000 can be used to store liquid hydrogen. The outer tank 300 of the liquid hydrogen tank 1000 is sleeved outside the inner tank 200. The space between the inner tank 200 and the outer tank 300 is evacuated to reduce the heat exchange between the inner tank 200 and the external environment. The support structure 10 is arranged between the inner tank 200 and the outer tank 300. The outer tank 300 supports and fixes the inner tank 200 through the support structure 10 to prevent the inner tank 200 from shaking.

[0036] The support structure 10 includes: a connection seat 1, a support member 2, and an elastic member 3. The connection seat 1 is adapted to be welded and fixed to the inner wall of the outer tank 300. The support member 2 can be connected to the connection seat 1 through the elastic member 3. The elastic member 3 can apply an elastic force to the support member 2 so that the support member 2 remains in contact with the outer wall of the inner tank 200. The support structure 10 is supported between the inner tank 200 and the outer tank 300 to support and limit the inner tank 200.

[0037] Specifically, the connection seat 1 has an installation cavity 111. The installation cavity 111 can be used to accommodate the elastic member 3 and part of the support member 2. The limiting hole 121 is located on the top wall of the installation cavity 111 close to the inner tank 200. The support member 2 is movably inserted through the limiting hole 121. The two ends of the support member 2 in the axial direction of the limiting hole 121 are respectively a connection end 21 and a support end 22. The support end 22 is outside the installation cavity 111 and is adapted to be in contact with the outer wall of the inner tank 200. The connection end 21 is inside the installation cavity 111 and is connected to the bottom wall of the installation cavity 111 of the connection seat 1 through the elastic member 3. The elastic member 3 can be in a compressed state. The elastic member 3 applies an elastic force to the connection end 21 in the direction close to the top wall to increase the pressure of the support end 22 of the support member 2 on the inner tank 200 and improve the support effect of the support member 2 on the inner tank 200. That is to say, the elastic potential energy stored in the elastic member 3 can be used to fix the inner tank 200 to provide stiffness for it, so that the support member 2 provides sufficient stiffness for the inner tank 200 and improves the modal frequency of the liquid hydrogen tank 1000.

[0038] At the same time, when the temperature of the inner tank 200 changes, the inner tank 200 deforms under the action of thermal stress. The support end 22 of the support member 2 is connected to the inner tank 200 in a non-rigid contact manner, so that the deformation of the inner tank 200 has little influence on the support effect of the support structure 10, which can relieve the thermal stress caused by temperature difference and prevent the support structure 10 and the inner tank 200 from being damaged.

[0039] According to the support structure 10 of the embodiment of the present utility model, the support structure 10 is arranged between the inner tank 200 and the outer tank 300 of the liquid hydrogen tank 1000. The support member 2 of the support structure 10 can be connected to the connection seat 1 through the elastic member 3. The support member 2 is movably inserted through the top wall of the installation cavity 111. The elastic member 3 applies an elastic force to the connection end 21 of the support member 2 in the direction close to the top wall of the installation cavity 111, so as to increase the pressure of the support end 22 of the support member 2 on the inner tank 200, improve the support effect of the support member 2 on the inner tank 200. At the same time, the support end 22 supports the inner tank 200 in a butting manner, so as to reduce the influence of the deformation of the inner tank 200 under thermal stress on the support structure 10, and improve the stability and reliability of the support structure 10.

[0040] In some embodiments of the present utility model, referring to Figures 1-3 As shown, the support member 2 is configured as a hemispherical shell 2a. The top end of the outer wall of the hemispherical shell 2a is the support end 22, and the annular bottom wall connecting its inner and outer walls is the connection end 21.

[0041] Wherein, the hemispherical shell 2a has a hemispherical outer wall, inner wall and an annular bottom wall connecting the inner and outer walls. The radius of the outer wall is greater than the radius of the inner wall. The outer circle radius of the annular bottom wall is the same as the radius of the outer wall, and the inner circle radius of the annular bottom wall is the same as the radius of the inner wall. The distance from the top end of the outer wall of the hemispherical shell 2a to any position on the edge of its outer wall is the same, and the annular bottom wall can be perpendicular to the axis of the limiting hole 121.

[0042] In the above embodiment, the support member 2 is configured as a hemispherical shell 2a to reduce the weight of the support member 2 and realize the light weight of the support member 2. At the same time, the cross-sectional area of the hemispherical shell 2a is small, and the contact heat exchange area between the support end 22 and the inner tank 200 is also small, so as to reduce the heat conduction amount of the support member 2, which is beneficial to reducing the static evaporation rate of the liquid hydrogen tank 1000. In addition, when the outer wall of the hemispherical shell 2a abuts against the inner tank 200, the contact surface between the support end 22 and the inner tank 200 is a smooth curved surface, so as to avoid scratching the inner tank 200 by the support end 22 and reduce the risk of air leakage of the inner tank 200.

[0043] In other embodiments of the present utility model, the support member 2 can also be configured as a cylinder, a frustum of a cone, a cone and other structures.

[0044] In some embodiments of the present utility model, the outer diameter of the hemispherical shell 2a is greater than the aperture of the limiting hole 121.

[0045] Among them, the outer diameter R1 of the hemispherical shell 2a and the aperture diameter R2 of the limiting hole 121 can satisfy the following relational expression: 1.2R2 ≤ R1 ≤ 2R2. It can be understood that if R1 < 1.2R2, the hemispherical shell 2a has a risk of slipping out of the limiting hole 121 when its volume decreases in a low-temperature environment. If R1 > 2R2, the occupied space of the hemispherical shell 2a in the installation cavity 111 is too large, which is not conducive to the miniaturization of the support structure 10. Optionally, R1 = 1.2R2, or R1 = 1.6R2, or R1 = 2R2.

[0046] In the above embodiment, the outer diameter of the hemispherical shell 2a is larger than the aperture diameter of the limiting hole 121. When the support structure 10 is not in use, the limiting hole 121 contacts and limits the outer wall of the hemispherical shell 2a to prevent the hemispherical shell 2a from slipping out of the installation cavity 111 through the limiting hole 121, which is beneficial to the assembly and use of the support structure 10. In addition, when the support structure 10 is in use, the hemispherical shell 2a is pressed into the installation cavity 111 by the inner tank 200, and the hemispherical shell 2a is separated from the limiting hole 121 to prevent the connecting seat 1 from directly transferring heat to the inner tank 200 through the hemispherical shell 2a.

[0047] In some embodiments of the present utility model, referring to Figures 1-3 As shown, the elastic member 3 is configured as a disc spring 3a. The connecting seat 1 forms a guide post 112 in the installation cavity 111, and the disc spring 3a is sleeved on the guide post 112.

[0048] Among them, the guide post 112 can extend along the axial direction of the limiting hole 121. The guide post 112 can be a hollow cylindrical structure to reduce the weight of the connecting seat 1. The axis of the disc spring 3a can coincide with the axis of the limiting hole 121, and the disc spring 3a is sleeved on the guide post 112 so that the disc spring 3a can expand and contract along the extension direction of the guide post 112.

[0049] In the above embodiment, the elastic member 3 is configured as a disc spring 3a. The disc spring 3a has the advantages of short stroke, heavy load and small required space. At the same time, the disc spring 3a is sleeved on the guide post 112 to prevent the disc spring 3a from deflecting and failing during expansion and contraction, which is beneficial to improving the stability and reliability of the support structure 10.

[0050] In other embodiments of the present utility model, the elastic member 3 is also configured as a gas spring, a helical spring, etc.

[0051] In some embodiments of the present utility model, referring to Figure 2 and Figure 3 As shown, the support structure 10 further includes: a support plate 4. The disc spring 3a is connected to the connecting end 21 through the support plate 4.

[0052] Among them, the support plate 4 can be made of a material with a low thermal conductivity. For example, the support plate 4 can be made of materials such as fiberglass, ceramic fiber, aerogel, etc. The heat transfer path from the outside to the inner tank 200 is as followsFigure 3 As shown by the arrow in the figure, specifically: outer tank 300, connecting seat 1, disc spring 3a, support plate 4, support member 2, inner tank 200. The disc spring 3a is connected to the connecting end 21 of the support member 2 through the support plate 4, and the support plate 4 can block the heat transfer between the disc spring 3a and the support member 2.

[0053] In the above embodiment, the disc spring 3a is connected to the connecting end 21 of the support member 2 through the support plate 4. The support plate 4 can reduce the heat conduction efficiency between the disc spring 3a and the support member 2, reduce the thermal conductivity of the support structure 10, and reduce the heat transfer of the support structure 10, so that as little external heat as possible is conducted to the inner tank 200.

[0054] In some embodiments of the present utility model, the thermal conductivity of at least one of the support member 2, the elastic member 3, and the support plate 4 is less than or equal to 0.256 W / (m·K). That is to say, at least one of the support member 2, the elastic member 3, and the support plate 4 can be made of a material with a low thermal conductivity to further reduce the heat transfer of the support structure 10. Among them, the material with a low thermal conductivity can be fiberglass, ceramic fiber, aerogel, etc.

[0055] In some embodiments of the present utility model, with reference to Figure 2 and Figure 3 As shown, the support plate 4 includes: an annular connecting portion 41 and an annular guiding portion 42. In the axial direction of the limiting hole 121, the annular connecting portion 41 is connected between the connecting end 21 and the disc spring 3a, and the annular guiding portion 42 is connected to the annular connecting portion 41. In the axial direction of the limiting hole 121, the annular guiding portion 42 is adapted to be in guiding cooperation with the side wall of the installation cavity 111.

[0056] Among them, the support plate 4 can be an annular structure with an L-shaped cross section. The annular connecting portion 41 is connected between the connecting end 21 and the disc spring 3a. The annular connecting portion 41 can block the heat transfer between the connecting end 21 and the disc spring 3a. At the same time, in the radial direction of the limiting hole 121, the size of the annular connecting portion 41 can be larger than the size of the connecting end 21, so that the connecting end 21 forms a stable connection with the disc spring 3a through the annular connecting portion 41, reducing the risk of the disc spring 3a being deflected or misaligned and failing. In addition, the annular connecting portion 41 can be sleeved on the guiding column 112 to avoid interference between the annular connecting portion 41 and the guiding column 112.

[0057] The annular guiding portion 42 can extend along the top wall of the installation cavity 111 in the axial direction of the limiting hole 121. When the elastic member 3 expands and contracts and deforms in the axial direction of the limiting hole 121, the outer wall of the annular guiding portion 42 can be in guiding cooperation with the side wall of the installation cavity 111 to reduce the risk of the support plate 4 tilting and losing stability. In addition, the inner wall of the annular guiding portion 42 can be in abutting cooperation with the outer wall of the hemispherical shell 2a to enhance the stability of the hemispherical shell 2a during movement, limit the movement of the hemispherical shell 2a in the radial direction of the limiting hole 121, and prevent the support structure 10 from failing.

[0058] In the above embodiment, the annular guiding portion 42 of the support plate 4 is adapted to be in guiding cooperation with the side wall of the installation cavity 111 to reduce the risk of the support plate 4 tilting and losing stability during movement, thereby facilitating the improvement of the stability and reliability of the support plate 4.

[0059] In some embodiments of the present utility model, with reference to Figures 1-3 as shown, the connecting seat 1 includes: a connecting groove body 11 and a connecting top cover 12. The connecting groove body 11 and the connecting top cover 12 are connected and jointly define an installation cavity 111, and the connecting top cover 12 is provided with a limiting hole 121.

[0060] Among them, the connecting top cover 12 forms a limiting hole 121. The connecting groove body 11 and the connecting top cover 12 can be connected by means of fasteners, snap connections, welding, etc. When manufacturing the support structure 10, the elastic member 3, a part of the support plate 4, and the support member 2 can be first installed into the connecting groove body 11, and then the connecting top cover 12 is assembled to the connecting groove body 11, so that the elastic member 3, the support plate 4, and a part of the support member 2 are located in the installation cavity 111.

[0061] In the above embodiment, the connecting groove body 11 and the connecting top cover 12 are connected and jointly define an installation cavity 111 to facilitate the assembly of the elastic member 3, the support member 2, and the support plate 4.

[0062] In some embodiments of the present utility model, with reference to Figure 3 as shown, the elastic member 3 is respectively connected to the connecting groove body 11 and the connecting end 21 to facilitate the assembly of the elastic member 3.

[0063] In some other embodiments of the present utility model (not shown in the figure), the elastic member 3 can be in a stretched state. One end of the elastic member 3 is connected to the connecting top cover 12, and the other end of the elastic member 3 is connected to the support plate 4 or the connecting end 21, so that the heat transfer path between the connecting seat 1 and the elastic member 3 changes from the connecting groove body 11 to the elastic member 3 to the connecting groove body 11, the connecting top cover 12, and the elastic member 3, thereby increasing the length of the heat transfer path to reduce the heat transfer of the support structure 10. Among them, the connecting groove body 11 can be made of a metal material part to facilitate its welding and fixing to the outer tank 300, and the connecting top cover 12 can be made of a material with a low thermal conductivity coefficient to further reduce the heat transfer of the support structure 10.

[0064] Referring to Figures 1-4 As shown, the liquid hydrogen tank 1000 according to another embodiment of the present utility model includes: an inner tank 200, an outer tank 300, and a support assembly 100. The inner tank 200 is disposed inside the outer tank 300. The support assembly 100 includes the support structure 10 for the liquid hydrogen tank 1000 in the above embodiment. The support structure 10 is disposed between the inner tank 200 and the outer tank 300, and the connecting seat 1 is fixedly connected to the outer tank 300, and the support end 22 abuts against the inner tank 200.

[0065] For the liquid hydrogen tank 1000 according to an embodiment of the present utility model, the support structure 10 is disposed between the inner tank 200 and the outer tank 300 of the liquid hydrogen tank 1000. The support member 2 of the support structure 10 can be connected to the connecting seat 1 through an elastic member 3. The support member 2 is movably disposed through the top wall of the installation cavity 111. The elastic member 3 applies an elastic force to the connecting end 21 of the support member 2 in the direction close to the top wall of the installation cavity 111 to increase the pressure of the support end 22 of the support member 2 on the inner tank 200, improve the support effect of the support member 2 on the inner tank 200. At the same time, the support end 22 supports the inner tank 200 by abutting, so as to reduce the influence of the deformation of the inner tank 200 under thermal stress on the support structure 10 and the outer tank 300, and improve the stability and reliability of the liquid hydrogen tank 1000.

[0066] In some embodiments of the present utility model, referring to Figure 4 As shown, the support assembly 100 includes N support structures 10, N≥3, and the N support structures 10 are arranged at intervals in the circumferential direction of the inner tank 200.

[0067] Among them, when the inner tank 200 deforms under the action of thermal stress, the deformation amount of the inner tank 200 in its axial direction (i.e., Figure 4 the direction perpendicular to the paper surface in) is usually greater than the deformation amount in its radial direction. Therefore, the N support structures 10 arranged at intervals in the circumferential direction of the inner tank 200 can support the inner tank 200 in the radial direction of the inner tank 200 and avoid the axial direction where the inner tank 200 has a large deformation amount. At the same time, the elastic member 3 can also absorb the deformation amount of the inner tank 200 in the radial direction by further compression to reduce the risk of the inner tank 200 being deformed by the support member 2.

[0068] The support assembly 100 may include three, four, five, six or other numbers of support structures 10. The N support structures 10 can be arranged at equal angular intervals in the circumferential direction of the inner tank 200 to ensure the stability of the inner tank 200. Referring to Figure 4As shown, the support assembly 100 includes three support structures 10. The included angle between two adjacent support structures 10 is 120°. Among them, the upper support structure 10 is placed at the highest point of the gap between the inner tank 200 and the outer tank 300. The two lower support structures 10 are arranged on the same horizontal line. The vertical displacement of the inner tank 200 is restricted by the upper support structure 10, and the self-weight of the inner tank 200 is borne by the two lower support structures 10, while restricting the vertical and radial displacements of the inner tank 200. The three support structures 10 can reduce the heat transfer path between the outside and the inner tank 200 while ensuring the support and fixation effect on the inner tank 200.

[0069] In the above embodiment, the N support structures 10 are arranged at intervals along the circumferential direction of the inner tank 200 to avoid the axial direction where the inner tank 200 has a large deformation amount, and improve the reliability of the liquid hydrogen tank 1000.

[0070] In some embodiments of the present invention, the number of the support assemblies 100 is multiple, and the multiple support assemblies 100 are arranged at intervals along the axial direction of the inner tank 200.

[0071] Among them, the number of the support assemblies 100 can be three, four, five, etc. The multiple support assemblies 100 can be arranged at equal distances along the axial direction of the inner tank 200. The number of the support assemblies 100 can be positively correlated with the length of the inner tank 200 in its axial direction. That is to say, the longer the length of the inner tank 200 in its axial direction, the more the number of the support assemblies 100 used.

[0072] In the above embodiment, the multiple support assemblies 100 are arranged at intervals along the axial direction of the inner tank 200 to form a stable and reliable support and fixation effect on the inner tank 200.

[0073] According to the liquid hydrogen tank 1000 of the embodiment of the present invention, the liquid hydrogen tank 1000 can be a mobile liquid hydrogen storage tank, which can be used to provide hydrogen for hydrogen energy vehicles. After hydrogen is compressed, it is cryogenically transformed into liquid hydrogen and stored in the adiabatic inner tank 200. Liquid hydrogen has the characteristics of high volume energy density.

[0074] The liquid hydrogen tank 1000 includes: an inner tank 200, an outer tank 300, pipelines, a charging limit structure, and a support structure 10. The inner tank 200 and the outer tank 300 can be cylindrical barrel structures. There is an adiabatic vacuum layer between the inner tank 200 and the outer tank 300. The pipelines are connected to the inner tank 200. The charging limit structure is arranged on the pipelines. The main function of the support structure 10 is to connect and fix the inner tank 200. The support structure 10 needs to meet two key indicators:

[0075] Natural frequency. To meet the vibration test requirements of the liquid hydrogen tank 1000, the support structure 10 needs to provide sufficient stiffness to the inner tank 200 to make its natural frequency as high as possible (>40 Hz);

[0076] The heat leakage. To meet the requirements of the 1000 static evaporation rate test of the liquid hydrogen tank, the support structure 10 needs to reduce heat transfer so that as little external heat as possible is conducted to the inner tank 200.

[0077] For the liquid hydrogen tank 1000 with the support structure 10 of the embodiment of the present utility model, through horizontal comparison by simulation, the first-order vertical vibration mode is increased from 62.0 Hz before improvement to 64.2 Hz, and the heat leakage is reduced from 20.4 W before improvement to 2.4 W. The natural frequency and heat leakage index of the support structure 10 of the embodiment of the present utility model have made significant progress.

[0078] The support structure 10 according to the embodiment of the present utility model has at least the following advantages:

[0079] 1. The support structure 10 can fix the inner tank 200 and the outer tank 300. The elastic potential energy stored in the elastic member 3 can enable the support member 2 to provide sufficient stiffness to the inner tank 200 and optimize the modal frequency of the liquid hydrogen tank 1000.

[0080] 2. The support member 2 is configured as a hemispherical shell 2a. The contact area between the support end 22 of the support member 2 and the inner tank 200 is significantly reduced compared with the prior art, which can effectively reduce the static evaporation rate of the liquid hydrogen tank 1000.

[0081] 3. The support structure 10 supports the inner tank 200 in the radial direction of the inner tank 200. The support structure 10 can release the axial deformation (displacement) generated by the inner tank 200 to relieve the thermal stress deformation caused by the temperature difference.

[0082] The vehicle according to another embodiment of the present utility model includes the liquid hydrogen tank 1000 of the above embodiment.

[0083] For the vehicle according to the embodiment of the present utility model, the support structure 10 of its liquid hydrogen tank 1000 is arranged between the inner tank 200 and the outer tank 300 of the liquid hydrogen tank 1000. The support member 2 of the support structure 10 can be connected to the connection seat 1 through the elastic member 3. The support member 2 is movably disposed through the top wall of the installation cavity 111. The elastic member 3 applies an elastic force to the connection end 21 of the support member 2 in the direction close to the top wall of the installation cavity 111 to increase the pressure of the support end 22 of the support member 2 on the inner tank 200 and improve the support effect of the support member 2 on the inner tank 200. At the same time, the support end 22 supports the inner tank 200 in a butt-joint manner to reduce the influence of the deformation of the inner tank 200 under thermal stress on the support structure 10 and the outer tank 300, and improve the stability and reliability of the liquid hydrogen tank 1000.

[0084] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0085] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A support structure for a liquid hydrogen tank, characterized in that, The support structure is adapted to be disposed between an inner tank (200) and an outer tank (300) of the liquid hydrogen tank, and the support structure includes: A connecting seat (1), the connecting seat (1) is adapted to be fixedly connected to the outer tank (300), the connecting seat (1) has an installation cavity (111), and a limiting hole (121) is formed in the top wall of the installation cavity (111); A support member (2), the support member (2) is movably inserted through the limiting hole (121), the support member (2) has a connecting end (21) inside the installation cavity (111) and a support end (22) outside the installation cavity (111), and the support end (22) is adapted to abut against the inner tank (200); An elastic member (3), the elastic member (3) is disposed inside the installation cavity (111), the elastic member (3) is respectively connected to the connecting end (21) and the connecting seat (1), and the elastic member (3) is used to apply an elastic force to the connecting end (21) in the direction close to the top wall.

2. The support structure for a liquid hydrogen tank according to claim 1, wherein, The support member (2) is configured as a hemispherical shell (2a), the top of the outer wall of the hemispherical shell (2a) is the support end (22), and the annular bottom wall connecting its inner and outer walls is the connecting end (21).

3. The support structure for a liquid hydrogen tank according to claim 2, characterized in that, The outer diameter of the hemispherical shell (2a) is larger than the aperture of the limiting hole (121).

4. The support structure for a liquid hydrogen tank according to claim 2, characterized in that, The elastic member (3) is configured as a disc spring (3a); A guiding column (112) is formed in the installation cavity (111) of the connecting seat (1), and the disc spring (3a) is sleeved on the guiding column (112).

5. The support structure for a liquid hydrogen tank according to claim 4, characterized in that, The support structure further includes: a support plate (4), and the support plate (4) includes: An annular connecting portion (41), in the axial direction of the limiting hole (121), the annular connecting portion (41) is connected between the connecting end (21) and the disc spring (3a); An annular guiding portion (42), the annular guiding portion (42) is connected to the annular connecting portion (41), and in the axial direction of the limiting hole (121), the annular guiding portion (42) is adapted to be in guiding cooperation with the side wall of the installation cavity (111).

6. The support structure for a liquid hydrogen tank according to claim 5, characterized in that, The thermal conductivity of at least one of the support member (2), the elastic member (3), and the support plate (4) is less than or equal to 0.256 W / (m·K).

7. The support structure for a liquid hydrogen tank according to any one of claims 1-6, characterized in that, The connecting seat (1) includes: a connecting groove body (11) and a connecting top cover (12), the connecting groove body (11) and the connecting top cover (12) are connected and jointly define the installation cavity (111), and the connecting top cover (12) is provided with the limiting hole (121).

8. A liquid hydrogen tank, characterized in that, Including: An inner tank (200) and an outer tank (300), the inner tank (200) is disposed inside the outer tank (300); A support assembly (100), the support assembly (100) includes: the support structure for a liquid hydrogen tank according to any one of claims 1-7, the support structure is disposed between the inner tank (200) and the outer tank (300), and the connecting seat (1) is fixedly connected to the outer tank (300), and the support end (22) abuts against the inner tank (200).

9. The liquid hydrogen tank according to claim 8, characterized in that, The support assembly (100) includes N support structures, where N ≥ 3, and the N support structures are arranged at intervals in the circumferential direction of the inner tank (200).

10. The liquid hydrogen tank according to claim 9, characterized in that, The number of the support assemblies (100) is multiple, and the multiple support assemblies (100) are arranged at intervals in the axial direction of the inner tank (200).

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