Design method and device for composite gas cylinder with flat lightweight fiber-wound lining

Abstract

The present application relates to a design method and device for a composite gas cylinder with a flat, lightweight fiber-wound liner. The method comprises: designing the configuration of the composite gas cylinder using an isotensoid combined head design; calculating the positive pressure value of the composite gas cylinder based on the winding tension generated during the design of the isotensoid combined head design; and, based on the positive pressure value, using a multi-layer, multi-angle, step-by-step hole expansion winding design to wind the mounting skirt of the composite gas cylinder onto the composite layers of the configuration. The present application can address the inherent problem of traditional designs being unsuitable for gas cylinders with flat structures, large head ellipsoid ratios, and large overall load capacities.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cylinder design, and more particularly to a design method and device for a composite material gas cylinder with a flat, lightweight fiber-wound liner. Background Art

[0002] Due to the large diameter of the spacecraft load-bearing cylinder, the gas cylinder has the characteristics of limited installation layout, high lightweight requirements, critical design strength, high stiffness requirements, large diameter, large ellipsoid ratio, and large deformation after pressurization.

[0003] At present, the traditional design method of composite gas cylinders can no longer adapt to designs with large diameter, large ellipsoid ratio, flat structure, large expansion deformation and heavy load. Summary of the Invention

[0004] The embodiments of this application provide a design method and apparatus for a flat, lightweight, fiber-wound composite gas cylinder with a liner. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is provided below. This summary is not intended to be a comprehensive review, identify key or important components, or delineate the scope of protection for these embodiments. Its sole purpose is to present some concepts in a simplified form, serving as a prelude to the detailed description that follows.

[0005] In a first aspect, an embodiment of the present application provides a method for designing a composite gas cylinder with a flat, lightweight fiber-wound liner, the method comprising:

[0006] The configuration of composite gas cylinder is designed by adopting the design method of isotensoid combined head;

[0007] Calculating the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head design is designed;

[0008] According to the positive pressure value, a multi-layer, multi-angle, step-by-step hole expansion winding design is adopted to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration.

[0009] Optionally, the configuration of the composite gas cylinder is designed by adopting an isotensoid combined head design method, including:

[0010] The isotensoid design structure is used to design the shoulder column section of the composite gas cylinder;

[0011] An ellipsoidal design structure is used to design the configuration of the composite gas cylinder head and the joint position;

[0012] The configuration of the composite gas cylinder is designed by designing the position of the shoulder of the configuration against the column section and the position of the head of the configuration against the joint;

[0013] The isotension design structure and the ellipsoid design structure are used as the isotension ellipsoid combined head design method.

[0014] Optionally, the design methods of the isotensoid combined head include: a spiral winding method of the head and a hole expansion winding method.

[0015] Optionally, the calculation of the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head design is designed includes:

[0016]

[0017] Wherein, σ is the positive pressure value; F is the winding tension, unit is N; n is the number of winding layers; R is the core mold radius, unit is mm; a is the yarn width.

[0018] Optionally, the multi-layer, multi-angle, step-by-step hole expansion winding design includes: a meridian winding line design.

[0019] Optionally, the installation skirt of the composite material gas cylinder is wrapped around the composite layer of the configuration, including:

[0020] An ear piece external hanging installation method is adopted, and the installation skirt of the composite material gas cylinder is wrapped around the waist column section, near the center of mass or near the equator of the composite layer of the configuration.

[0021] Optionally, the installation skirt of the composite material gas cylinder is wrapped around the composite layer of the configuration, including:

[0022] The buffer layer paving design at the interface between the composite layer and the installation skirt, and the longitudinal groove design on the circumference of the installation skirt.

[0023] In a second aspect, an embodiment of the present application provides a design device for a composite gas cylinder with a flat, lightweight fiber-wound liner, the device comprising:

[0024] The configuration design module is used to design the configuration of composite gas cylinders using an isotensoid combined head design method;

[0025] a calculation module, configured to calculate the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head is designed;

[0026] The winding module is used to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration according to the positive pressure value by adopting a multi-layer, multi-angle, step-by-step hole expansion winding design.

[0027] In a third aspect, an embodiment of the present application provides a computer storage medium, which stores a plurality of instructions suitable for being loaded by a processor and executing the above-mentioned method steps.

[0028] In a fourth aspect, an embodiment of the present application provides a terminal, which may include: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the above-mentioned method steps.

[0029] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0030] In an embodiment of the present application, the design method of a composite gas cylinder with a flat, lightweight fiber-wound liner first adopts an isotensoid combined head design method to design the configuration of the composite gas cylinder; then, based on the winding tension generated during the design of the isotensoid combined head design method, the positive pressure value of the composite gas cylinder is calculated; finally, based on the positive pressure value, a multi-layer, multi-angle, step-by-step reaming winding design is adopted to wind the installation skirt of the composite gas cylinder on the composite layer of the configuration. This application solves the technical problem of flat gas cylinders with an ellipsoid ratio between 1.8 and 2.3 and a diameter between φ600mm and φ1000mm being easily broken or cracked when subjected to large axial deformation of 22mm to 35mm caused by high-pressure expansion by using an isotensoid combined head design method and a multi-layer, multi-angle, step-by-step reaming winding design that combines spiral winding and reaming winding, which effectively achieves the winding stability of ultra-thin-wall (wall thickness 0.5mm to 0.8mm) metal liners, avoiding the phenomenon of liner instability and delamination between winding layers during the winding process.

[0031] In an embodiment of the present application, the design method of the composite gas cylinder with a flat lightweight fiber-wound liner first adopts an isotensoid combined head design method to design the configuration of the composite gas cylinder; then, based on the winding tension generated during the design of the isotensoid combined head design method, the positive pressure value of the composite gas cylinder is calculated; the buffer layer layout at the interface between the composite layer and the mounting skirt is designed, and the longitudinal grooves on the circumference of the mounting skirt are designed; finally, based on the positive pressure value, a multi-layer, multi-angle, step-by-step hole expansion winding design, a meridian winding linear laying method, and an ear piece external mounting method are adopted to wind the mounting skirt of the composite gas cylinder around the waist column section, near the center of mass, or near the equator on the composite layer of the configuration. This application adopts a secondary skirting method between the metal mounting skirt and the non-metallic composite layer of dissimilar materials, adopts a buffer layer laying design method for the interface between the mounting skirt and the composite layer, and opens a longitudinal groove design on the circumference of the mounting skirt, thereby solving the technical problems of equal stress connection and consistent coordinated deformation between the two dissimilar materials of the mounting skirt and the composite layer, and realizing the free expansion and contraction of the gas cylinder under high pressure; by designing the mounting skirt at the waist column section for large-diameter and flat gas cylinders, and the ear-piece external mounting skirt design structure, it not only has the ability to resist vibration and impact of large-load gas cylinders and stable operation, but also realizes a lightweight design, with a dead weight of 38kg and a load capacity of 200kg to 2000kg, which caters to the actual installation needs of lightweight composite gas cylinders for large spacecraft in future development trends; by designing a linear laying method along the meridian winding, the variable wall thickness laying of the composite layer is effectively realized, and the strength utilization coefficient is improved.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] Figure 1 This is a flow chart of a method for designing a composite material gas cylinder with a flat, lightweight fiber-wound liner provided in an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the structure of a composite gas cylinder according to a design method for a flat, lightweight, fiber-wound liner composite gas cylinder provided in an embodiment of the present application;

[0036] Figure 3 This is a schematic structural diagram of an isotensoidal, elliptical combined head busbar in a design method for a flat, lightweight fiber-wound liner composite gas cylinder provided in an embodiment of the present application;

[0037] Figure 4This is a schematic diagram of the installation skirt structure of a gas cylinder clamp according to a design method for a flat, lightweight, fiber-wound liner composite gas cylinder provided in an embodiment of the present application;

[0038] Figure 5 This is a schematic diagram of a design device for a composite material gas cylinder with a flat, lightweight fiber-wound liner provided in an embodiment of the present application;

[0039] Figure 6 This is a terminal schematic diagram provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.

[0041] It should be understood that the embodiments described are only a portion 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 persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0042] In the following description, unless otherwise indicated, identical numbers in different figures represent identical or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of systems and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0043] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0044] The following will be combined with the Figure 1 -Attached Figure 4 , a design method for a composite material gas cylinder with a flat lightweight fiber-wound liner provided in an embodiment of the present application is introduced in detail.

[0045] See Figure 1-4 , provides a flow chart of a design method for a composite gas cylinder with a flat lightweight fiber-wound liner in an embodiment of the present application. Figure 1-4 As shown, the method of the embodiment of the present application may include the following steps:

[0046] The present application provides a method for designing a composite gas cylinder with a flat, lightweight fiber-wound liner, which relates to the technical field of composite gas cylinders. It is a method for designing a composite high-pressure gas cylinder with a large diameter, large ellipsoid ratio, large load, and flat, lightweight fiber-wound ultra-thin-wall metal liner. It is used to solve the matching layer of a flat, large-deformation structure, including: a winding configuration design of a composite gas cylinder with a large diameter and large ellipsoid ratio (using an isotensoid combined head design configuration), a secondary skirt technology design on the outer surface of a large-load composite layer (using a large-size flat configuration to wrap and install the skirt at the waist column section), a flat fiber winding stability design, and an accurate calculation of the positive pressure of the ultra-thin-wall liner due to the fiber winding tension. It can solve the problem inherent in the related art that traditional designs cannot be applied to gas cylinders with a flat structure, a large head ellipsoid ratio, and a large overall load.

[0047] S100, adopts the design method of isotensoid combined head to design the configuration of composite gas cylinder.

[0048] In the embodiment of the present application, the isotensoid combined head design method is adopted to achieve the matching design of the winding line type and the configuration. At the same time, the isotensoid combined head design method is more conducive to the balanced distribution of stress caused by the large axial deformation of the flat structure, and is more conducive to the effective use of fiber strength; the isotensoid combined head design method includes: a head spiral winding method and a hole expansion winding method. The configuration design is to carry out the fiber routing along the meridian (also known as the geodesic) trajectory by combining the head spiral winding method and the hole expansion winding method to achieve stable yarn laying, effectively suppress large axial deformation, and is suitable for large-size small winding angle modes with a winding angle of about 6° to 12° for flat structures that are difficult to achieve with conventional winding. The stability of the hanging wire during winding is more in line with the flat lining reference configuration. At the same time, the following meridian winding line design is used to achieve a stable laying of the composite layer with variable wall thickness, which can effectively improve the fiber strength utilization coefficient.

[0049] S100 includes: adopting an isotensoid design structure to design the column-facing position of the composite gas cylinder's configuration shoulder; adopting an ellipsoid design structure to design the joint-facing position of the composite gas cylinder's configuration head; designing the configuration of the composite gas cylinder by designing the column-facing position of the configuration shoulder and the joint-facing position of the configuration head; and using the isotensoid design structure and the ellipsoid design structure as the isotensoid ellipsoid combined head design method.

[0050] The composite gas cylinder with a large diameter and large ellipsoid ratio flat lightweight fiber-wound metal liner described in the embodiment of the present application has an ultra-thin wall lining base wall thickness of 0.8 mm, adopts a variable wall thickness lining design structure, has a load capacity of 398 kg, a height of 572 mm, a diameter of φ926 mm, and an ellipsoid ratio of 2.3:1.

[0051] The isotension ellipsoid combined head (configuration) design method is adopted, which is better adapted to large-diameter, large-ellipsoid ratio winding type gas cylinders. The general ellipsoid ratio is 1.8 to 2.3, and the applicable diameter is in the range of φ600mm to φ1000mm. (Configuration) The isotension design structure is adopted at the column section of the shoulder, which not only gives full play to the equal stress transfer advantage of the head, reduces the risk of stress concentration, but also solves the problem of compressive stress cracking of the shoulder of the ellipsoid head. (Configuration) The ellipsoid design structure is adopted at the joint position of the head to achieve a flat design with high space constraints. The isotension ellipsoid combined head design effectively avoids the "bulge or crack" that is easy to occur in the weak area of ​​the head shoulder after pressurization of the pure ellipsoid structure for large-diameter, large-ellipsoid ratio composite layer. The ellipsoid is a conventional curve, and the isotension is the generatrix of the head curve. The specific isotension calculation formula is as follows:

[0052]

[0053] Among them, d0 is the polar hole diameter, D0 is the waist column section diameter, x represents the latitude circle radius on the head, r represents the ratio of the latitude circle radius to the equatorial maximum circle radius, and z(r) represents the ratio of the height of each latitude circle on the curve to the equatorial maximum circle radius.

[0054] The configuration of the embodiment of the present application adopts a combined linear design. The configuration is a flat combined design. Its busbar is composed of an isotensoid curve, an elliptical curve and a transition circular curve. It not only shows a stable force, but also adapts to the characteristics of the load-bearing cylinder layout with limited installation space, large diameter and small height. Figure 3 shown.

[0055] S200, calculating the positive pressure value of the composite material gas cylinder based on the winding tension generated when the isotensoid combined head design is designed, including:

[0056] Positive pressure is generated by the winding tension when the fiber filaments are tightened during winding. The positive pressure design generated by the winding tension has a certain impact on the instability of ultra-thin wall linings. The winding method provides an accurate calculation method for the positive pressure generated by the winding tension, which is important for effectively avoiding the rigid instability and winding delamination of ultra-thin wall linings (wall thickness 0.5mm to 0.8mm) during the winding process. The accurate calculation method of positive pressure is as follows:

[0057]

[0058] Wherein, σ is the positive pressure value; F is the winding tension, unit is N; n is the number of winding layers; R is the core mold radius, unit is mm; a is the yarn width, which is the width of the fiber filaments spliced ​​together.

[0059] S300: Based on the positive pressure value, a multi-layer, multi-angle, step-by-step hole expansion winding design is adopted to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration.

[0060] In an embodiment of the present application, the multi-layer, multi-angle, step-by-step hole expansion winding design includes: a meridian winding line design.

[0061] The embodiment of the present application adopts a multi-layer, multi-angle, step-by-step hole expansion and winding design to form a balanced structure of equal strength, which adapts to the structural design with large axial deformation after pressurization and expansion. The axial deformation is in the range of 22mm to 35mm. During repeated pressure increase and release, the large deformation realizes the step-by-step and uniform stress release of the gas cylinder head shell, so that it will not "become unstable or crack" under the large deformation state.

[0062] The winding method uses a meridian winding line design to achieve a stable layer of composite layer with variable wall thickness, effectively improving the strength coefficient. The specific calculation of the uniform thickness of the head is as follows:

[0063] h f =〔(D0 2 -d0 2 ) / (D 2 -d0 2 )〕 1 / 2 h fa

[0064] Among them, h f is the fiber thickness at the latitude circle, D0 is the diameter of the waist column section, d0 is the diameter of the polar hole, D is the diameter of the latitude circle at the corresponding position of the head, h fa is the thickness of the fiber layer in the waist column section.

[0065] In an embodiment of the present application, the installation skirt of the composite gas cylinder wrapped around the composite layer of the configuration includes: adopting an ear-piece external installation method to wrap the installation skirt of the composite gas cylinder around the waist column section, near the center of mass or near the equator circle on the composite layer of the configuration.

[0066] The mounting skirt structure of the embodiment of the present application adopts an external mounting method of lugs, which is suitable for radial mounting such as load-bearing cylinders. This external mounting method has certain anti-vibration advantages in overcoming the forces such as lateral vibration, longitudinal vibration, and bending of heavy-duty gas cylinders. At the same time, this external mounting method has good force stability. This external mounting structure meets the conditions for adopting a lug structure, which can achieve a significant weight reduction effect. The weight of the mounting skirt can be saved by more than 50%. The lug structure realizes the rigidity conditions during the operation of heavy-duty products. The force of the lugs can also ensure the magnitude required for heavy loads. At the same time, the flexible follow-up characteristics of the longitudinal slots in the mounting skirt can meet the radial deformation limit caused by the expansion of composite high-pressure gas cylinders.

[0067] The mounting skirt position can preferably be set at the (waist) column section position, near the center of mass or near the equator, and a single-point fixed constraint can be used to realize the static load and dynamic load fixed constraint of the entire gas cylinder plus the medium through a single mounting skirt. There is no need to add radial constraints near the gas nozzle. The determination of the mounting skirt position effectively solves the problems of easy debonding of the contact area of ​​the mounting skirt of flat and heavy-load composite high-pressure gas cylinders and excessive response of the vibration test curve exceeding the vibration magnitude tolerance band.

[0068] In summary, the placement of the mounting skirt within the cylinder and the external lug mounting skirt structure—located at the waist column, near the center of mass, or near the equator—help maximize the cylinder's load capacity, ensuring more stable operation during use and, to a certain extent, reducing the chance of debonding at the interface of the mounting skirt. Furthermore, the placement of the mounting skirt within the flat waist configuration and the external lug mounting structure not only enhance the vibration and impact resistance of heavy-duty cylinders, but also achieve a lightweight mounting skirt design.

[0069] In an embodiment of the present application, the installation skirt of the composite material gas cylinder wrapped on the composite layer of the configuration includes: a buffer layer laying design at the interface between the composite layer and the installation skirt, and a longitudinal groove design on the circumference of the installation skirt.

[0070] The heavy-duty gas cylinder developed for the above-mentioned fiber-wound metal-lined large-diameter, large-ellipsoidal-ratio flat lightweight composite gas cylinder has a special structure. The installation interface is combined with the metal installation skirt and the fiber material composite layer under epoxy resin bonding to achieve a large load capacity, meet the mechanical resistance conditions of a large number of levels, and have high-pressure bearing capacity, such as Figure 2 In the embodiment of the present application, a buffer (material) layer is laid at the interface between the installation skirt and the composite layer, and a buffer material layer is laid at the connection interface between the installation skirt and the composite layer, thereby achieving stress buffering and equal stress transfer. The buffer layer is laid with the epoxy resin.

[0071] The installation adopts an ear-shaped external mounting skirt structure. The mounting skirt is a flexible and adaptive inverted cone ring structure, which is divided into a flexible part with a gradually variable wall thickness (65mm long) and a rigid part with a fixed wall thickness (45mm long). The wall thickness of the flexible part is a thin-walled gradually variable inverted cone ring that gradually changes from 1.0mm to 2.0mm. There are 16 U-shaped longitudinal grooves with a width of 1mm evenly distributed on the circumference of the mounting skirt, and 4 circumferential grooves with a width of 4mm and a depth of 0.4mm are opened on the outer circumference of the gradually variable inverted cone ring. Figure 4As shown. The mounting skirt is designed with longitudinal grooves on its circumference. The (U-shaped) longitudinal grooves are approximately 2 / 3 to 3 / 4 the depth of the mounting skirt contact height. The grooves are located at positions corresponding to the lugs, and the number of grooves matches the number of lugs. The longitudinal grooves in the mounting skirt of this embodiment primarily allow for the cylinder to expand and contract freely during pressure charging and depressurization, effectively solving the problem of deformation consistency while also providing strong mechanical resistance.

[0072] A skirt is installed by wrapping metal material twice on the non-metallic composite layer of the waist column section of the "flying saucer" shaped gas cylinder. It is proposed that the high-pressure composite material gas cylinder achieves consistent interface connection (i.e. stress connection) and zero-gap fit between dissimilar materials (metal skirt and non-metallic composite layer) under the state of large radial deformation, which effectively improves the large-load mechanical resistance of the gas cylinder, so that the gas cylinder can carry a load range of 200kg to 2000kg, solving the technical bottleneck that the load-bearing capacity of the original two-end fixed support method is limited to less than 100kg.

[0073] In summary, the design method of the composite gas cylinder with flat light fiber winding lining described in this application adopts the design of isotensoid combined head configuration, secondary skirt technology design of the outer surface of the composite layer, large-size flat configuration installation position layout design, ear-type installation skirt configuration design, flat light fiber winding stability design and other methods. It proposes a configuration that adapts to large ellipsoid ratio and large diameter wound gas cylinders, a winding design for large deformation and flat structures, a secondary skirt technology design between dissimilar materials, a design of equal stress transfer and stress buffering layering, a longitudinal groove design that allows the installation skirt to shrink and expand freely, an installation position layout design, an ear-type external installation skirt design, a yarn laying line design with a small winding angle and other design methods and successful ideas. This gas cylinder design patent breaks through the key technology of "strength improvement and deformation consistency design of composite gas cylinders with large ellipsoid ratios", and solves the problems of "easy slippage due to small winding angles, poor winding line stability, and low fiber strength utilization coefficient". A breakthrough has been achieved in the key technology of enhancing the stiffness and designing a compatible configuration for a flat, lightweight, isotensoid composite gas cylinder head. This addresses the issue of large-diameter gas cylinders being prone to instability due to their flat configuration and prone to wire breakage due to their weak shoulders. This approach has been successfully validated in actual production. The method described in this application offers an effective solution for designs with unusual shapes, such as large diameters, large ellipsoid ratios, flat structures, significant expansion and deformation, and heavy loads, for which traditional design methods are unable to adapt.

[0074] The following are embodiments of the apparatus of the present invention, which can be used to implement the method embodiments of the present invention. For details not disclosed in the apparatus embodiments of the present invention, please refer to the method embodiments of the present invention.

[0075] See Figure 5, which shows a schematic structural diagram of a device for designing a composite gas cylinder with a flat, lightweight fiber-wound liner according to an exemplary embodiment of the present invention. The device comprises: a configuration design module 10, a calculation module 20, and a winding module 30.

[0076] Configuration design module 10, used to design the configuration of composite gas cylinders using an isotensoid combined head design method;

[0077] A calculation module 20 is used to calculate the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head design method is designed;

[0078] The winding module 30 is used to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration according to the positive pressure value by adopting a multi-layer, multi-angle, step-by-step hole expansion winding design.

[0079] It should be noted that the above-mentioned embodiment provides a composite material gas cylinder design device with a flat, lightweight fiber-wound liner, and only uses the division of the above-mentioned functional modules as an example when executing the composite material gas cylinder design method with a flat, lightweight fiber-wound liner. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the composite material gas cylinder design device with a flat, lightweight fiber-wound liner provided in the above-mentioned embodiment and the composite material gas cylinder design method with a flat, lightweight fiber-wound liner embodiment belong to the same concept. The implementation process thereof is detailed in the method embodiment and will not be repeated here.

[0080] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0081] In an embodiment of the present application, the design method of a composite gas cylinder with a flat, lightweight fiber-wound liner first adopts an isotensoid combined head design method to design the configuration of the composite gas cylinder; then, based on the winding tension generated during the design of the isotensoid combined head design method, the positive pressure value of the composite gas cylinder is calculated; finally, based on the positive pressure value, a multi-layer, multi-angle, step-by-step reaming winding design is adopted to wind the installation skirt of the composite gas cylinder on the composite layer of the configuration. This application solves the technical problem of flat gas cylinders with an ellipsoid ratio between 1.8 and 2.3 and a diameter between φ600mm and φ1000mm being easily broken or cracked when subjected to large axial deformation of 22mm to 35mm caused by high-pressure expansion by using an isotensoid combined head design method and a multi-layer, multi-angle, step-by-step reaming winding design that combines spiral winding and reaming winding, which effectively achieves the winding stability of ultra-thin-wall (wall thickness 0.5mm to 0.8mm) metal liners, avoiding the phenomenon of liner instability and delamination between winding layers during the winding process.

[0082] The present invention also provides a computer-readable medium having program instructions stored thereon, which, when executed by a processor, implements the design method of a composite material gas cylinder with a flat lightweight fiber-wound liner provided by each of the above method embodiments.

[0083] The present invention also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method for designing a composite material gas cylinder with a flat lightweight fiber-wound liner according to each of the above method embodiments.

[0084] See Figure 6 , provides a schematic diagram of the structure of a terminal according to an embodiment of the present application. Figure 6 As shown, the terminal 1000 may include: at least one processor 1001 , at least one network interface 1004 , a user interface 1003 , a memory 1005 , and at least one communication bus 1002 .

[0085] The communication bus 1002 is used to implement the connection and communication between these components.

[0086] The user interface 1003 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 1003 may also include a standard wired interface and a wireless interface.

[0087] The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0088] The processor 1001 may include one or more processing cores. The processor 1001 utilizes various interfaces and circuits to connect various components within the terminal 1000. It executes instructions, programs, code sets, or instruction sets stored in the memory 1005, and calls data stored in the memory 1005 to perform various functions and process data for the terminal 1000. Optionally, the processor 1001 may be implemented using at least one hardware form selected from the group consisting of a digital signal processing (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 1001 may integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. The CPU primarily processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content displayed on the display screen; and the modem handles wireless communications. It is understood that the modem may not be integrated into the processor 1001 and may be implemented separately on a separate chip.

[0089] Among them, the memory 1005 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable storage medium. The memory 1005 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 1005 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 1005 may also be optionally at least one storage device located away from the aforementioned processor 1001. As Figure 6 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a design application for a composite gas cylinder with a flat, lightweight, fiber-wound liner.

[0090] exist Figure 6In the terminal 1000 shown, the user interface 1003 is mainly used to provide an input interface for the user and obtain user input data; and the processor 1001 can be used to call the flat lightweight fiber-wound liner composite gas cylinder design application stored in the memory 1005 and specifically perform the following operations:

[0091] The configuration of the composite gas cylinder is designed by adopting an isotensoid combined head design method; the isotensoid combined head design method includes: a spiral winding method and a hole expansion winding method;

[0092] Calculating the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head design is designed;

[0093] According to the positive pressure value, a multi-layer, multi-angle, step-by-step hole expansion winding design is adopted to wind the mounting skirt of the composite material gas cylinder on the composite layer of the configuration; the multi-layer, multi-angle, step-by-step hole expansion winding design includes: a meridian winding line design.

[0094] In one embodiment, when the processor 1001 executes the design of the composite material gas cylinder using the isotensoid combined head design method, the processor 1001 specifically performs the following operations:

[0095] The isotensoid design structure is used to design the shoulder column section of the composite gas cylinder;

[0096] An ellipsoidal design structure is used to design the configuration of the composite gas cylinder head and the joint position;

[0097] The configuration of the composite gas cylinder is designed by designing the position of the shoulder of the configuration against the column section and the position of the head of the configuration against the joint;

[0098] The isotension design structure and the ellipsoid design structure are used as the isotension ellipsoid combined head design method.

[0099] In one embodiment, when the processor 1001 calculates the positive pressure value of the composite gas cylinder based on the winding tension generated when the isotensoid combined head design is performed, the processor 1001 specifically performs the following operations:

[0100]

[0101] Wherein, σ is the positive pressure value; F is the winding tension, unit is N; n is the number of winding layers; R is the core mold radius, unit is mm; a is the yarn width.

[0102] In one embodiment, when executing the step of wrapping the installation skirt of the composite material gas cylinder on the composite layer of the configuration, the processor 1001 specifically performs the following operations:

[0103] An ear piece external hanging installation method is adopted, and the installation skirt of the composite material gas cylinder is wrapped around the waist column section, near the center of mass or near the equator of the composite layer of the configuration.

[0104] In one embodiment, when executing the step of wrapping the installation skirt of the composite material gas cylinder on the composite layer of the configuration, the processor 1001 specifically performs the following operations:

[0105] The buffer layer paving design at the interface between the composite layer and the installation skirt, and the longitudinal groove design on the circumference of the installation skirt.

[0106] In an embodiment of the present application, the design method of a composite gas cylinder with a flat, lightweight fiber-wound liner first adopts an isotensoid combined head design method to design the configuration of the composite gas cylinder; then, based on the winding tension generated during the design of the isotensoid combined head design method, the positive pressure value of the composite gas cylinder is calculated; finally, based on the positive pressure value, a multi-layer, multi-angle, step-by-step reaming winding design is adopted to wind the installation skirt of the composite gas cylinder on the composite layer of the configuration. This application solves the technical problem of flat gas cylinders with an ellipsoid ratio between 1.8 and 2.3 and a diameter between φ600mm and φ1000mm being easily broken or cracked when subjected to large axial deformation of 22mm to 35mm caused by high-pressure expansion by using an isotensoid combined head design method and a multi-layer, multi-angle, step-by-step reaming winding design that combines spiral winding and reaming winding, which effectively achieves the winding stability of ultra-thin-wall (wall thickness 0.5mm to 0.8mm) metal liners, avoiding the phenomenon of liner instability and delamination between winding layers during the winding process.

[0107] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0108] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A design method for a composite gas cylinder with a flat lightweight fiber-wound liner, characterized in that: The following steps are involved: The configuration of composite gas cylinder is designed by adopting the design method of isotensoid combined head; Calculating the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head design is designed; According to the positive pressure value, a multi-layer, multi-angle, step-by-step hole expansion winding design is adopted to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration; The configuration of the composite gas cylinder is designed by adopting the isotensoid combined head design method, including: The isotensoid design structure is used to design the shoulder column section of the composite gas cylinder; An ellipsoidal design structure is used to design the configuration of the composite gas cylinder head and the joint position; The configuration of the composite gas cylinder is designed by designing the position of the shoulder of the configuration against the column section and the position of the head of the configuration against the joint; The isotension design structure and the ellipsoid design structure are used as the isotension ellipsoid combined head design mode; The design methods of the isotensoid combined head include: a head spiral winding method and a hole expansion winding method.

2. The design method of a composite gas cylinder with a flat lightweight fiber-wound liner according to claim 1 is characterized in that: The calculation of the positive pressure value of the composite material gas cylinder based on the winding tension generated when the isotensoid combined head design is designed includes: ， Where, is the positive pressure value; F is the winding tension, unit is N; n is the number of winding layers; R is the core mold radius, unit is mm; a is the yarn width.

3. The design method of a composite material gas cylinder with a flat lightweight fiber-wound liner according to claim 1 is characterized in that: The multi-layer, multi-angle, step-by-step hole expansion winding design includes: a meridian winding line design.

4. The design method of a composite gas cylinder with a flat lightweight fiber-wound liner according to claim 1 is characterized in that: The installation skirt of the composite material gas cylinder is wound around the composite layer of the configuration, comprising: An ear piece external hanging installation method is adopted, and the installation skirt of the composite material gas cylinder is wrapped around the waist column section, near the center of mass or near the equator of the composite layer of the configuration.

5. The design method of a composite material gas cylinder with a flat lightweight fiber-wound liner according to claim 1 is characterized in that: The installation skirt of the composite material gas cylinder is wound around the composite layer of the configuration, comprising: The buffer layer paving design at the interface between the composite layer and the installation skirt, and the longitudinal groove design on the circumference of the installation skirt.

6. A design device for a composite gas cylinder with a flat, lightweight fiber-wound liner, characterized in that: include: The configuration design module is used to design the configuration of composite gas cylinders using an isotensoid combined head design method, including: The isotensoid design structure is used to design the shoulder column section of the composite gas cylinder; An ellipsoidal design structure is used to design the configuration of the composite gas cylinder head and the joint position; The configuration of the composite gas cylinder is designed by designing the position of the shoulder of the configuration against the column section and the position of the head of the configuration against the joint; The isotension design structure and the ellipsoid design structure are used as the isotension ellipsoid combined head design mode; The design methods of the isotensoid combined head include: a spiral winding method and a hole expansion winding method; a calculation module, configured to calculate the positive pressure value of the composite material gas cylinder according to the winding tension generated when the isotensoid combined head is designed; The winding module is used to wind the installation skirt of the composite material gas cylinder on the composite layer of the configuration according to the positive pressure value by adopting a multi-layer, multi-angle, step-by-step hole expansion winding design.

7. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, which are suitable for being loaded by a processor and executing the method steps according to any one of claims 1 to 5.

8. A terminal, characterized in that: include: A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the method steps according to any one of claims 1 to 5.

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