High-pressure hydrogen cylinder inner container arc top fiber winding shape determining method and system, computer equipment and storage medium

Abstract

The invention provides a high-pressure hydrogen cylinder inner container arc top fiber winding shape determining method and system, computer equipment and a storage medium. The method comprises the steps that on the basis of the known inner container arc top shape, the abscissa value of each point on an outer contour curve between an (i-1) th fiber layer outer contour curve and an ith fiber layer outer contour curve is determined; and determining the coordinate of each point on the outer contour of the ith fiber layer according to the abscissa value of each point on the outer contour curve between the outer contour curve of the (i-1) th fiber layer and the outer contour curve of the ith fiber layer and the coordinate value of each point on the arc top curve of the liner, so as to determine the winding shape of the ith fiber layer on the arc top of the liner. The structure of fiber winding described by a formula is provided for corresponding CAE software and is subjected to structural strength analysis together with the metal valve seat, the stress condition of the arc top of the gas cylinder can be predicted, the close correlation between the valve seat and the inner container structure is considered, and the overall strength and sealing performance of the gas cylinder are further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage cylinders, and in particular relates to a method, system, computer equipment and storage medium for determining the arc top fiber winding shape of an inner liner of a high-pressure hydrogen cylinder. Background Art

[0002] There are two main types of gas cylinders commonly used to store high-pressure hydrogen: Type III and Type IV. The main function of the inner liner of Type III and Type IV cylinders is to prevent gas leakage, while the ability to withstand pressure loads is borne by the wound reinforced fiber layer. Among them, Type III gas cylinders use metal inner liners, while Type IV gas cylinders have non-metallic inner liners, which are usually made of thermoplastic high-density polyethylene or nylon, and the outside of the inner liner is wound with carbon fiber or aramid fiber.

[0003] The control of the fiber winding angle, winding thickness and winding tension of the reinforcing fiber layer are important technical parameters in the design of high-pressure hydrogen cylinders. In the prior art, the fiber layer winding design of Type III and Type IV hydrogen cylinders is mainly carried out through the composite material layer theory method.

[0004] However, the composite material layer theory method is relatively complex and cannot accurately predict the local stress condition, especially it cannot be used for stress analysis of the top arc of the gas cylinder. It also ignores the close connection between the valve seat and the liner structure, which will affect the overall strength and sealing performance of the gas cylinder. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method, system, computer equipment and storage medium for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder.

[0006] In a first aspect, the present invention provides a method for determining the arc top fiber winding shape of a high-pressure hydrogen cylinder liner, comprising:

[0007] Obtain the expression of the liner arc top curve on the two-dimensional coordinate system to determine the coordinate value of each point on the liner arc top curve; wherein the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the liner arc top is located and the liner axis, the ordinate direction is the liner axis direction; the abscissa direction is perpendicular to the ordinate direction;

[0008] Determine the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer;

[0009] The coordinates of each point on the outer contour of the i-th fiber layer are determined according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer and the i-th fiber layer and the coordinate value of each point on the inner liner arc top curve to determine the winding shape of the i-th layer of fiber at the inner liner arc top.

[0010] Optionally, determining the abscissa value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer includes:

[0011] Determine the axial winding of the i-th layer of fiber in the inner liner and the circumferential winding The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fiber

[0012] Get the thickness h of a single-layer fiber yarn bundle 0 ;

[0013] The horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer is calculated according to the following formula

[0014]

[0015] in, The i-1th layer of fiber is wound axially around the inner shell and the i-1th layer of fiber is wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

[0016] Optionally, the inner container is determined to be axially wound with the i-th layer of fibers and circumferentially wound with the i-th layer of fibers. The value of the outer contour curve of the fiber layer after the layer of fiber is added on the horizontal axis, including:

[0017] According to the following formula, the axial winding of the i-th layer of fiber in the inner shell is calculated. The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is:

[0018]

[0019] Among them, R 0 is the radius of the inner cylinder.

[0020] Optionally, the step of determining the coordinates of each point on the outer contour of the i-th fiber layer according to the abscissa value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the liner arc top curve to determine the winding shape of the i-th fiber layer at the liner arc top includes:

[0021] Get the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis

[0022] The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ):

[0023]

[0024] in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h 0 is the thickness of a single-layer fiber yarn bundle;

[0025] The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

[0026] In a second aspect, the present invention provides a system for determining the shape of arc top fiber winding of a high-pressure hydrogen cylinder liner, comprising:

[0027] An acquisition module is used to acquire an expression of the liner arc top curve in a two-dimensional coordinate system to determine the coordinate value of each point on the liner arc top curve; wherein the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the liner arc top is located and the liner axis, the ordinate direction is the liner axis direction; and the abscissa direction is perpendicular to the ordinate direction;

[0028] A first determination module is used to determine the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer;

[0029] The second determination module is used to determine the coordinates of each point on the outer contour curve of the i-th fiber layer according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the inner liner arc top curve, so as to determine the winding shape of the i-th layer of fibers at the inner liner arc top.

[0030] Optionally, the first determining module includes:

[0031] The first determination unit is used to determine the axial winding of the i-th layer of fiber in the inner liner, the circumferential winding The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fiber

[0032] The first acquisition unit is used to acquire the thickness h of the single-layer fiber yarn bundle. 0 ;

[0033] The first calculation unit is used to calculate the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer according to the following formula

[0034]

[0035] in, The i-1th layer of fiber is wound axially around the inner shell and wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

[0036] Optionally, the first determining unit includes:

[0037] The calculation device is used to calculate the axial winding of the i-th layer of fiber in the inner liner and the circumferential winding according to the following formula The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is:

[0038]

[0039] Among them, R 0 is the radius of the inner cylinder.

[0040] Optionally, the second determining module includes:

[0041] The second acquisition unit is used to obtain the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis

[0042] The second calculation unit is used to calculate the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ):

[0043]

[0044] in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h 0 is the thickness of a single-layer fiber yarn bundle;

[0045] The second determining unit is used to determine the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

[0046] In a third aspect, the present invention provides a computer device comprising a processor and a memory; wherein, when the processor executes a computer program stored in the memory, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder described in the first aspect are implemented.

[0047] In a fourth aspect, the present invention provides a computer-readable storage medium for storing a computer program; when the computer program is executed by a processor, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder described in the first aspect are implemented.

[0048] The present invention provides a method, system, computer equipment and storage medium for determining the winding shape of the arc top fiber of the inner liner of a high-pressure hydrogen gas cylinder. In the method, the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer is determined based on the known shape of the arc top of the inner liner; the coordinates of each point on the outer contour of the i-th fiber layer are determined according to the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer and the coordinate value of each point on the arc top curve of the inner liner, so as to determine the winding shape of the i-th layer of fiber at the arc top of the inner liner. In the fiber winding molding process, the core mold parameters are updated in real time according to the needs, and a new process file is formed and provided to the winding machine; the configuration of the fiber winding described by the formula is provided to the corresponding CAE software, and together with the metal valve seat, the strength analysis of the structure is performed, so that the local stress condition can be predicted, especially the stress analysis for the arc top of the gas cylinder, and the close relationship between the valve seat and the inner liner structure is considered, thereby improving the overall strength and sealing performance of the gas cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A schematic flow chart of a method for determining the arc top fiber winding shape of a high-pressure hydrogen cylinder liner provided in an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of the outer contour curves of different layers of fibers provided by an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of a curve of the arc top of a gas cylinder when the number of fiber layers i=4 provided in an embodiment of the present invention;

[0053] Figure 4 A schematic diagram of a curve of the arc top of a gas cylinder when the number of fiber layers i=10 provided in an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of a curve of the arc top of a gas cylinder when the number of fiber layers i=15 provided in an embodiment of the present invention;

[0055] Figure 6A schematic diagram of a curve of the arc top of a gas cylinder when the number of fiber layers i=20 provided in an embodiment of the present invention;

[0056] Figure 7 A schematic structural diagram of a system for determining the arc top fiber winding shape of a high-pressure hydrogen cylinder liner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example 1

[0059] like Figure 1 As shown, this embodiment provides a method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder, comprising:

[0060] Step 101, obtaining an expression of an inner liner arc top curve in a two-dimensional coordinate system to determine the coordinate value of each point on the inner liner arc top curve.

[0061] like Figure 2 As shown, the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the inner liner arc is located and the inner liner axis, the ordinate direction is the direction of the inner liner axis; the abscissa direction is perpendicular to the ordinate direction. 0 is the radius of the straight section (cylindrical part) of the inner tank; R is the height of the position of the upper pole hole of the inner tank on the y-axis of the two-dimensional coordinate system; pole is the polar aperture radius.

[0062] Step 102, determining the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer.

[0063] Multiple axial fiber layers and circumferential fiber layers are wound outside the inner liner. The fiber layer thickness at the top of the inner liner arc is composed of axial winding, and the fiber layer thickness at the straight section of the inner liner is composed of axial winding and circumferential winding.

[0064] Since the fiber winding is continuous, according to the conservation of mass (volume), we can get:

[0065]

[0066] in, The i-th layer of fiber is wound axially around the inner shell and wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fiber is on the horizontal axis; N is the total number of axially wound fiber layers; π is the circumference; the thickness of the fiber yarn bundle after dipping depends on the type of yarn and the amount of dipping, and is a constant under fixed process conditions. In an ideal state, the thickness of the fiber yarn bundle in the straight section is uniform, and h is used to represent it. 0 Indicates the thickness of a single-layer fiber bundle; the thickness of the fiber bundle at the top of the arc is uneven, expressed as h (i) It represents the thickness of the fiber yarn bundle when winding the i-th layer of axial fibers.

[0067] set up The number of layers of circumferential winding that have been completed during the i-th layer of axial winding is calculated according to the following formula: The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is:

[0068]

[0069] Exemplarily, this step includes obtaining the thickness h of a single-layer fiber yarn bundle. 0 .

[0070] The horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer is calculated according to the following formula

[0071]

[0072] in, The i-1th layer of fiber is wound axially around the inner shell and wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

[0073] Step 103, determine the coordinates of each point on the outer contour of the i-th fiber layer according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the inner liner arc top curve, so as to determine the winding shape of the i-th layer of fibers at the inner liner arc top.

[0074] Exemplarily, this step includes obtaining the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis

[0075] The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ):

[0076]

[0077] in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h 0 It is the thickness of a single layer of fiber yarn bundle.

[0078] The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

[0079] In this step, is the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis, then It can be expressed as:

[0080]

[0081] After i layers of winding, the mass (volume) conservation formula and You can get:

[0082]

[0083] According to the derivation formula, we can get:

[0084]

[0085] Because h (i-1) and r (i-1) , Compared to the small amount, we can get h (i-1) About r (i-1) and The relationship is:

[0086]

[0087] As i increases, approaches 0, so

[0088] So we have:

[0089]

[0090] It can be further expressed as:

[0091]

[0092] Type IV hydrogen storage cylinder, inner diameter R 0400mm; wall thickness 3mm, inner liner straight section length L is 500mm; fiber bundle thickness h 0 =0.0005mm; the total number of axial fiber plies N = 20, and the number of circumferential plies wrapped by axial winding is 10.

[0093] Assume that the curve at the top of the inner arc is an ellipse, and its equation is:

[0094]

[0095] Where b = 80 mm, a = R 0 .

[0096] The radius of the inner hole From the ellipse equation we can calculate:

[0097] From the ellipse equation we get:

[0098]

[0099] We can further calculate the curves for different fiber ply numbers. Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the curves of the arc top of the gas cylinder when the number of fiber layers laid is i=4, 10, 15, and 20 are given in sequence.

[0100] From these figures, we can see that as the number of fiber layers increases, a sharp increase in fiber accumulation will form at the edge of the pole hole. Therefore, as the number of fiber winding layers increases, the radius of the pole hole should be appropriately increased to control the accumulation of fibers near the pole hole.

[0101] In summary, this embodiment provides a method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder. During the fiber winding molding process, the core mold parameters are updated in real time according to needs, and a new process file is formed and provided to the winding machine; the fiber winding configuration described by the formula is provided to the corresponding CAE software, and together with the metal valve seat, the strength analysis of the structure is carried out, which can predict the local stress condition, especially the stress analysis of the arc top of the gas cylinder, taking into account the close relationship between the valve seat and the inner liner structure, thereby improving the overall strength and sealing performance of the gas cylinder.

[0102] Example 2

[0103] Based on the same inventive concept as Example 1, this example provides a system for determining the shape of the arc top fiber winding of the inner liner of a high-pressure hydrogen cylinder. Since the principle of solving the problem by this system is similar to the aforementioned method for determining the shape of the arc top fiber winding of the inner liner of a high-pressure hydrogen cylinder, the implementation of this system can refer to the implementation of the method for determining the shape of the arc top fiber winding of the inner liner of a high-pressure hydrogen cylinder.

[0104] like Figure 7 As shown, the arc top fiber winding shape determination system of the inner liner of a high-pressure hydrogen cylinder includes:

[0105] The acquisition module 10 is used to obtain the expression of the inner liner arc top curve in the two-dimensional coordinate system to determine the coordinate value of each point on the inner liner arc top curve; wherein the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the inner liner arc top is located and the inner liner axis, and the vertical coordinate direction is the direction of the inner liner axis; the horizontal coordinate direction is perpendicular to the vertical coordinate direction.

[0106] The first determination module 20 is used to determine the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer.

[0107] The second determination module 30 is used to determine the coordinates of each point on the outer contour curve of the i-th fiber layer according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the inner liner arc top curve, so as to determine the winding shape of the i-th layer of fibers at the inner liner arc top.

[0108] Exemplarily, the first determining module includes:

[0109] The first determination unit is used to determine the axial winding of the i-th layer of fiber in the inner liner, the circumferential winding The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fiber

[0110] The first acquisition unit is used to acquire the thickness h of the single-layer fiber yarn bundle. 0 .

[0111] The first calculation unit is used to calculate the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer according to the following formula

[0112]

[0113] in, The i-1th layer of fiber is wound axially around the inner shell and the i-1th layer of fiber is wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

[0114] Exemplarily, the first determining unit includes:

[0115] The calculation device is used to calculate the axial winding of the i-th layer of fiber in the inner liner and the circumferential winding according to the following formula The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is:

[0116]

[0117] Among them, R 0 is the radius of the inner cylinder.

[0118] Exemplarily, the second determining module includes:

[0119] The second acquisition unit is used to obtain the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis

[0120] The second calculation unit is used to calculate the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ):

[0121]

[0122] in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h 0 It is the thickness of a single layer of fiber yarn bundle.

[0123] The second determination unit is used to determine the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

[0124] For more specific working processes of the above modules, please refer to the corresponding contents disclosed in Example 1, which will not be repeated here.

[0125] Example 3

[0126] This embodiment provides a computer device, including a processor and a memory; wherein, when the processor executes the computer program stored in the memory, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder described in Example 1 are implemented.

[0127] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 1, which will not be repeated here.

[0128] Example 4

[0129] This embodiment provides a computer-readable storage medium for storing a computer program; when the computer program is executed by a processor, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder described in Example 1 are implemented.

[0130] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 1, which will not be repeated here.

[0131] Example 5

[0132] This embodiment provides a computer program product, including computer executable instructions or a computer program. When the computer executable instructions or the computer program are executed by a processor, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder described in Example 1 are implemented.

[0133] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 1, which will not be repeated here.

[0134] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the systems, devices, storage media, and computer program products disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0135] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention or some parts of the embodiments.

[0136] In some embodiments, computer executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0137] As an example, computer-executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0138] As an example, computer executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one site, or on multiple electronic devices distributed at multiple sites and interconnected by a communication network.

[0139] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A method for determining the arc top fiber winding shape of a high-pressure hydrogen cylinder liner, characterized in that: include: Obtain the expression of the liner arc top curve on the two-dimensional coordinate system to determine the coordinate value of each point on the liner arc top curve; wherein the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the liner arc top is located and the liner axis, the ordinate direction is the liner axis direction; the abscissa direction is perpendicular to the ordinate direction; Determine the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer; The coordinates of each point on the outer contour of the i-th fiber layer are determined according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer and the i-th fiber layer and the coordinate value of each point on the inner liner arc top curve to determine the winding shape of the i-th layer of fiber at the inner liner arc top.

2. The method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder according to claim 1 is characterized in that: The step of determining the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer comprises: Determine the axial winding of the i-th layer of fiber in the inner liner and the circumferential winding The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fiber Get the thickness h0 of a single-layer fiber yarn bundle; The horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer is calculated according to the following formula in, The i-1th layer of fiber is wound axially around the inner shell and the i-1th layer of fiber is wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

3. The method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder according to claim 2 is characterized in that: The inner shell is determined to be axially wound with the i-th layer of fibers, and circumferentially wound The value of the outer contour curve of the fiber layer after the layer of fiber is added on the horizontal axis, including: According to the following formula, the axial winding of the i-th layer of fiber in the inner shell is calculated. The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is: Wherein, R0 is the radius of the inner cylinder.

4. The method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder according to claim 3 is characterized in that: The method of determining the coordinates of each point on the outer contour of the i-th fiber layer according to the abscissa value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the liner arc top curve to determine the winding shape of the i-th fiber layer at the liner arc top includes: Get the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ): in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h0 is the thickness of the single-layer fiber yarn bundle; The coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

5. A system for determining the shape of arc top fiber winding of the inner liner of a high-pressure hydrogen cylinder, characterized in that: include: An acquisition module is used to acquire an expression of the liner arc top curve in a two-dimensional coordinate system to determine the coordinate value of each point on the liner arc top curve; wherein the origin of the two-dimensional coordinate system is the intersection of the plane where the bottom of the liner arc top is located and the liner axis, the ordinate direction is the liner axis direction; and the abscissa direction is perpendicular to the ordinate direction; A first determination module is used to determine the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer; The second determination module is used to determine the coordinates of each point on the outer contour curve of the i-th fiber layer according to the horizontal coordinate value of each point on the outer contour curve between the i-1th fiber layer outer contour curve and the i-th fiber layer outer contour curve and the coordinate value of each point on the inner liner arc top curve, so as to determine the winding shape of the i-th layer of fibers at the inner liner arc top.

6. The arc top fiber winding shape determination system for the inner liner of a high-pressure hydrogen cylinder according to claim 5 is characterized in that: The first determining module comprises: The first determination unit is used to determine the axial winding of the i-th layer of fiber in the inner liner, the circumferential winding The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fiber A first obtaining unit, used for obtaining the thickness h0 of the single-layer fiber yarn bundle; The first calculation unit is used to calculate the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-1th fiber layer and the outer contour curve of the i-th fiber layer according to the following formula in, The i-1th layer of fiber is wound axially around the inner shell and the i-1th layer of fiber is wound circumferentially. The value of the outer contour curve of the fiber layer after the layer of fibers is removed on the horizontal axis.

7. The arc top fiber winding shape determination system for the inner liner of a high-pressure hydrogen cylinder according to claim 6 is characterized in that: The first determining unit includes: The calculation device is used to calculate the axial winding of the i-th layer of fiber in the inner liner and the circumferential winding according to the following formula The value of the outer contour curve of the fiber layer on the horizontal axis after the layer of fibers is: Wherein, R0 is the radius of the inner cylinder.

8. The arc top fiber winding shape determination system for the inner liner of a high-pressure hydrogen cylinder according to claim 7 is characterized in that: The second determining module comprises: The second acquisition unit is used to obtain the angle between the surface normal direction of the i-1th fiber layer curve and the horizontal axis The second calculation unit is used to calculate the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ): in, is the horizontal coordinate value of each point on the outer contour curve between the outer contour curve of the i-2nd fiber layer and the outer contour curve of the i-1st fiber layer; (r (0) ,z (0) ) is the horizontal axis r (i) The coordinates on the inner liner arc top curve corresponding to the time; h0 is the thickness of the single-layer fiber yarn bundle; The second determination unit is used to determine the coordinates of each point on the outer contour of the i-th fiber layer (r (i) ,z (i) ) Determine the winding shape of the i-th layer of fibers at the top of the inner liner.

9. A computer device, characterized in that: It comprises a processor and a memory; wherein, when the processor executes the computer program stored in the memory, it implements the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: Used to store computer programs; when the computer programs are executed by the processor, the steps of the method for determining the arc top fiber winding shape of the inner liner of a high-pressure hydrogen cylinder as described in any one of claims 1-4 are implemented.

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