Optimization design method of metal hose and related device

Abstract

The invention discloses an optimal design method of a metal hose and a related device, and belongs to the field of hose design, and the method comprises the following steps: determining the stress of an expansion joint in the metal hose caused by an external load; determining the stress of the expansion joint in the metal hose caused by the displacement; determining the meridian total stress of the expansion joint in the metal hose; determining stress and bursting pressure of a steel wire mesh sleeve in the metal hose; determining the fatigue life and the stability of the metal hose; selecting design structure parameters of the metal hose, which meet the stress of an expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the meridian total stress of the expansion joint in the metal hose, the stress and bursting pressure of a steel wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose; the metal hose designed through the method and the related device is high in working safety and structural reliability.

Description

Technical Field

[0001] The invention belongs to the field of hose design and relates to an optimization design method of a metal hose and a related device. Background Art

[0002] Metal hoses are used to transport gas and liquid fluids and compensate for axial and radial swing displacement and assembly deviation of the connecting devices at both ends. They are widely used in military and civilian equipment such as steam turbines, gas turbines, aircraft engines, liquid rocket engines, heavy petrochemical equipment, ships and automobiles.

[0003] At present, in the field of expansion joint and metal hose design and manufacturing, the American EJMA standard, GB / T12777, GB14525, JB6169 and other standards are more common. However, the above standards adopt independent design and calculation methods for the expansion joint and metal mesh sleeve of the metal hose, and do not consider the common bearing and coordinated deformation of the expansion joint and metal mesh sleeve under load and displacement, resulting in a non-negligible deviation between the design state and the actual service state of the metal hose, thus affecting the working safety and structural reliability of the metal hose. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an optimization design method and related devices for a metal hose. The metal hose designed by this method and the related devices has high working safety and structural reliability.

[0005] To achieve the above object, the present invention discloses an optimization design method for a metal hose, comprising: Determine the stress in the expansion joint of the metal hose caused by external loads; Determine the stress in the expansion joint of the metal hose caused by displacement; Determine the total meridional stress of the expansion joint in the metal hose; Determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; Determine the fatigue life and stability of metal hoses; Select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0006] The design structural parameters of the metal hose include the waveform, beam and wavelength of the corrugated tube in the metal hose and the material, number of strands and wire diameter of the metal mesh.

[0007] Furthermore, the design structural parameters of the metal hose include the waveform, beam and wavelength of the bellows in the metal hose, and the material, number of strands and wire diameter of the metal mesh.

[0008] Furthermore, the process of determining the stress of the expansion joint in the metal hose caused by the displacement is: For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0009]

[0010] in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, and is the correction factor, is the axial displacement of a single wave in the metal hose, is the wave height of the bellows, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material; For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0011]

[0012] in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure, is the average rate radius of the bellows crest, is the wave height coefficient.

[0013] Furthermore, the stress of the wire mesh sleeve in the metal hose for:

[0014] in, is the welding joint coefficient of the steel wire, is the correction coefficient of uneven force on the mesh wire, is the correction factor for the number of mesh layers, It is the maximum working pressure of the metal hose at the working temperature. is the median diameter of the bellows, is the total axial stiffness of the expansion joint in the metal hose, is the total axial stiffness of the metal mesh in the metal hose, is the number of net strands, is the number of steel wires per mesh, It is the weaving angle of the metal mesh. is the wire diameter.

[0015] Furthermore, the total axial stiffness of the metal mesh in the metal hose is for:

[0016] in, represents the elastic modulus of the steel wire, is the cross-sectional area of ​​the wire, is the length of the wire.

[0017] Furthermore, the total axial stiffness of the metal mesh in the metal hose is for:

[0018] in, is the single section axial elastic stiffness of the expansion joint in the metal hose, is the wave number of the bellows.

[0019] Furthermore, the bursting pressure of the wire mesh sleeve is for:

[0020] in, is the elastic limit of the metal mesh material.

[0021] The invention discloses an optimization design system for a metal hose, comprising: A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load; A second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement; The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose; The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; The fifth determination module is used to determine the fatigue life and stability of the metal hose; The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by the displacement, the total meridional stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0022] The present invention discloses a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the metal hose optimization design method are implemented.

[0023] The present invention discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the optimization design method of the metal hose are realized.

[0024] The present invention has the following beneficial effects: The optimization design method and related device of the metal hose described in the present invention combine the expansion joint and the metal mesh sleeve during specific operation, consider the combined stiffness of the two under load, coordinate deformation and comprehensive load capacity distribution, improve the deformation and load deviation caused by the independent calculation of the expansion joint and the metal mesh sleeve in the metal hose design method and national standards, and improve the accuracy and rationality of the metal hose design and calculation. Compared with the traditional design method, the metal hose designed by the present invention has higher working safety and structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 is a flow chart of the method of the present invention; Figure 2 It is a system structure diagram of the present invention. DETAILED DESCRIPTION

[0026] 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 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.

[0027] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0029] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0030] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0031] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0034] Embodiment 1 refer to Figure 1 The optimization design method of the metal hose of the present invention comprises the following steps: 1) Calculate the maximum working pressure of the metal hose at working temperature according to GB / T 14525-2010 ; 2) Calculate the axial combined stiffness of the metal hose ; The specific process of step 2) is: Total axial stiffness of metal mesh in metal hose for:

[0035] in, is the number of strands in the mesh, is the number of steel wires per mesh, is the elastic modulus of the steel wire, is the cross-sectional area of ​​the wire, is the length of the wire, It is the braiding angle of the steel wire.

[0036] Calculation of the single-section axial elastic stiffness of the expansion joint in the metal hose according to GB / T 12777-2019 and total axial stiffness They are:

[0037]

[0038] in, is the middle diameter of the bellows, Design temperature The elastic modulus of the lower bellows material, is the nominal thickness of a layer of material in the bellows, The thickness is The number of material layers of the bellows, is the wave height of the bellows, is the wave height coefficient, is the average radius of curvature of the wave crest of the bellows, is the correction factor, is the wave number of the bellows.

[0039] Axial combined stiffness of metal hose for: .

[0040] 3) According to the maximum working pressure of the metal hose at the working temperature And the axial combined stiffness of the metal hose , calculate the total axial displacement of the metal hose , wherein the total axial displacement of the metal hose for:

[0041] Among them, the axial displacement of a single wave in the metal hose for: .

[0042] 4) Calculate the stress of the expansion joint caused by external load according to Appendix A2 of GB / T12777; 5) Calculate the stress of the metal hose expansion joint caused by displacement; For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0043]

[0044] in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, is the correction factor, is the axial displacement of a single wave in the metal hose, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material.

[0045] For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0046]

[0047] in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure.

[0048] 6) Calculate the total meridional stress of the expansion joint; 7) Calculate the stress and bursting pressure of the wire mesh sleeve; Among them, the stress of the wire mesh sleeve for:

[0049] Burst pressure of wire mesh sleeve for:

[0050] in, is the welding joint coefficient of the steel wire, is the elastic limit of the metal mesh material, is the correction coefficient for uneven force on the mesh wire, is the correction factor for the number of mesh layers.

[0051] Minimum burst pressure for:

[0052] in, Select according to GB / T14525-2010.

[0053] 8) Perform fatigue life design and stability calculation according to Appendix A2 of GB / T12777.

[0054] 9) According to the stress of the expansion joint caused by the load calculated in step 4), the stress of the expansion joint of the metal hose caused by the displacement calculated in step 5), the total meridional stress of the expansion joint calculated in step 6), the stress and bursting pressure of the wire mesh sleeve calculated in step 7), and the fatigue life designed in step 8) and the stability calculated, the design structural parameters of the metal hose are determined. The design structural parameters of the metal hose include the waveform, beam and wavelength of the bellows and the material, number of strands and wire diameter of the metal mesh. It should be noted that different design structural parameters of the metal hose correspond to different stresses of the expansion joint caused by the load, stresses of the expansion joint of the metal hose caused by the displacement, total meridional stress of the expansion joint, stress and bursting pressure of the wire mesh sleeve, fatigue life and stability. The present invention selects the design structural parameters of the metal hose that meet the above performance according to the stress of the expansion joint caused by the load calculated in step 4), the stress of the expansion joint of the metal hose caused by the displacement calculated in step 5), the total meridional stress of the expansion joint calculated in step 6), the stress and bursting pressure of the wire mesh sleeve calculated in step 7), and the fatigue life designed in step 8) and the stability calculated.

[0055] It should be noted that the present invention takes into account and calculates the combined stress state and coordinated deformation of the bellows and the metal mesh sleeve under load, which effectively improves the design accuracy, application reliability and safety of the metal hose.

[0056] Embodiment 2 refer to Figure 2 The optimization design system of the metal hose of the present invention comprises: A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load; A second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement; The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose; The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; The fifth determination module is used to determine the fatigue life and stability of the metal hose; The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by the displacement, the total meridional stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0057] The division of modules in the embodiments of the present invention is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present invention may be integrated into one processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0058] Embodiment 3 A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the optimization design method of the metal hose are implemented, for example, including: determining the stress of the expansion joint in the metal hose caused by external load; determining the stress of the expansion joint in the metal hose caused by displacement; determining the total stress in the meridional direction of the expansion joint in the metal hose; determining the stress and bursting pressure of the steel wire mesh sleeve in the metal hose; determining the fatigue life and stability of the metal hose; determining the design structural parameters of the metal hose according to the stress of the expansion joint in the metal hose caused by external load, the stress of the expansion joint in the metal hose caused by displacement, the total stress in the meridional direction of the expansion joint in the metal hose, the stress and bursting pressure of the steel wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs, specifically, the programs may include program codes, and the program codes include computer operation instructions. The memory may include internal memory and non-volatile memory, and provide instructions and data to the processor.

[0059] Embodiment 4 A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of implementing the optimization design method of the metal hose are implemented, for example, including: determining the stress of the expansion joint in the metal hose caused by external load; determining the stress of the expansion joint in the metal hose caused by displacement; determining the total meridional stress of the expansion joint in the metal hose; determining the stress and bursting pressure of the wire mesh sleeve in the metal hose; determining the fatigue life and stability of the metal hose; determining the design structural parameters of the metal hose according to the stress of the expansion joint in the metal hose caused by external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridional stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory and / or cache memory, etc. The non-volatile memory may include read-only memory, hard disk, flash memory, optical disk, magnetic disk, etc.

[0060] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program code.

[0061] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0062] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0063] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0064] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention is indicated by the following claims.

[0065] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for optimizing the design of a metal hose, characterized in that: include: Determine the stress in the expansion joint of the metal hose caused by external loads; Determine the stress in the expansion joint of the metal hose caused by displacement; Determine the total meridional stress of the expansion joint in the metal hose; Determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; Determine the fatigue life and stability of metal hoses; Select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

2. The optimization design method of the metal hose according to claim 1, characterized in that: The design structural parameters of the metal hose include the waveform, beam and wavelength of the corrugated tube in the metal hose and the material, number of strands and wire diameter of the metal mesh.

3. The optimization design method of the metal hose according to claim 1, characterized in that: The process of determining the stress of the expansion joint in the metal hose caused by displacement is: For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is: in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, and is the correction factor, is the axial displacement of a single wave in the metal hose, is the wave height of the bellows, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material; For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is: in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure, is the average rate radius of the bellows crest, is the wave height coefficient.

4. The optimization design method of the metal hose according to claim 1, characterized in that: The stress of the wire mesh sleeve in the metal hose for: in, is the welding joint coefficient of the steel wire, is the correction coefficient of uneven force on the mesh wire, is the correction factor for the number of mesh layers, It is the maximum working pressure of the metal hose at the working temperature. is the median diameter of the bellows, is the total axial stiffness of the expansion joint in the metal hose, is the total axial stiffness of the metal mesh in the metal hose, is the number of net strands, is the number of steel wires per mesh, For the weaving angle of the metal mesh, is the wire diameter.

5. The optimization design method of the metal hose according to claim 4, characterized in that: The total axial stiffness of the metal mesh in the metal hose for: in, represents the elastic modulus of the steel wire, is the cross-sectional area of ​​the wire, is the length of the wire.

6. The optimization design method of the metal hose according to claim 4, characterized in that: The total axial stiffness of the metal mesh in the metal hose for: in, is the single section axial elastic stiffness of the expansion joint in the metal hose, is the wave number of the bellows.

7. The optimization design method of the metal hose according to claim 4, characterized in that: The bursting pressure of the wire mesh sleeve for: in, is the elastic limit of the metal mesh material.

8. An optimization design system for a metal hose, characterized in that: include: A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load; A second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement; The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose; The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; The fifth determination module is used to determine the fatigue life and stability of the metal hose; The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by the displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for optimizing the design of the metal hose as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing the design of the metal hose as claimed in any one of claims 1 to 7 are implemented.

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