CN114383034A - Fiber winding intersecting spherical shell pressure container - Google Patents

Fiber winding intersecting spherical shell pressure container Download PDF

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Publication number
CN114383034A
CN114383034A CN202210049625.1A CN202210049625A CN114383034A CN 114383034 A CN114383034 A CN 114383034A CN 202210049625 A CN202210049625 A CN 202210049625A CN 114383034 A CN114383034 A CN 114383034A
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spherical
shell
spherical shells
intersecting
shells
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王立朋
郑华勇
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Lightyear Exploration Jiangsu Space Technology Co ltd
Shanghai Aerospace System Engineering Institute
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Lightyear Exploration Jiangsu Space Technology Co ltd
Shanghai Aerospace System Engineering Institute
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Publication of CN114383034A publication Critical patent/CN114383034A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2154—Winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Data Mining & Analysis (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • Algebra (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a fiber winding intersecting spherical shell pressure vessel, which consists of at least 2 intersecting spherical shells, wherein high-rigidity composite material fiber bundles are wound at the intersecting positions of the spherical shells, so that the partition plate structure of the intersecting spherical shell pressure vessel is reduced, the structure is simplified, and the manufacturing complexity is reduced. The sizes and relative positions of all the intersected spherical shells of the pressure container structure disclosed by the invention can be matched at will, and the designability is high. When the cross section area of the wound fiber bundle is designed based on the formula disclosed by the invention, the shell of the whole pressure vessel is of an equal stress structure, compared with the traditional cylindrical pressure vessel, the thickness of the cylinder section is reduced by 50%, and the overall weight reduction can reach 30%.

Description

Fiber winding intersecting spherical shell pressure container
Technical Field
The invention relates to the field of structural design of pressure vessels, in particular to a pressure vessel which has high requirement on structural weight, high internal pressure and complex design space.
Background
The pressure container mainly has two structural forms of a cylindrical shell and a spherical shell, wherein the structural efficiency of the standard spherical shell is highest, the spherical shell is in an equal stress state under the action of internal pressure, the material utilization rate is highest, and the pressure container is generally used in scenes with higher requirements on material cost or structural weight, such as a high-pressure gas cylinder, an extrusion pressure container and the like. The spherical shell pressure container has the disadvantages of complex manufacturing process, high requirement on space, necessity of accommodating the space of a complete sphere and difficulty in connection with other structures. The cylindrical shell pressure vessel is composed of spherical shells at two ends and a cylindrical shell in the middle, and the spherical shells at the two ends are changed into ellipsoidal shells or three-core shells with shorter height in order to save space. Compared with an ideal spherical shell, the cylindrical shell pressure vessel has a larger surface area under the same volume, and the thickness of the cylindrical shell is doubled compared with that of the spherical shell under the same pressure and radius, so that the structural weight of the cylindrical shell pressure vessel is obviously higher than that of the spherical shell under the requirements of the same volume and pressure. The cylindrical shell pressure vessel has the advantages of simple production process and convenient installation and transportation.
How to exert the respective advantages of the spherical shell pressure vessel and the cylindrical shell pressure vessel and realizing the weight reduction of the structure is a difficult point of the design of the pressure vessel.
Disclosure of Invention
The invention mainly solves the contradiction that the traditional cylindrical shell pressure container has higher weight and the spherical shell pressure container has larger diameter, realizes the weight reduction of the pressure container structure and improves the structural efficiency.
The invention has the beneficial effects that: on the premise of realizing structural efficiency equivalent to that of the spherical shell pressure container, the spherical shell pressure container has the advantages of a cylindrical shell and the spherical shell pressure container, can adapt to various spatial layouts, and has the advantages of weight reduction and flexible design. The invention can obviously reduce the structural weight of the pressure vessel.
With reference to fig. 1, the calculation formula related to the present invention is derived as follows:
r1、r2the radii of the middle surfaces of the two intersected spherical shells are respectively;
t1、t2the thicknesses of the two intersected spherical shells are respectively;
A. b is the distance from the spherical center of the two intersected spherical shells to the intersected surface;
F1、F2respectively is the resultant force of the internal stress of the two intersected spherical shells in the unit intersection arc length;
F3is F1、F2The resultant force of (a);
l is the distance between the centers of two intersected spherical shells, and L is A + B;
p is the pressure inside the pressure vessel.
From the geometrical relationships, it is easy to deduce:
Figure RE-GDA0003540188970000021
Figure RE-GDA0003540188970000022
according to the equal stress design, the thickness of the spherical shell meets the following requirements:
Figure RE-GDA0003540188970000023
at the intersecting line of the spherical shells, the internal forces of 2 spherical shells and the wound fiber bundle are in a static balance state, and according to the design of equal stress, if the internal stresses of the spherical shells are sigma, the resultant forces of the internal stresses of the spherical shells in the intersecting arc length unit are respectively as follows:
Figure RE-GDA0003540188970000024
according to the static balance condition, the radial components of the resultant force of the three spherical shells in a unit arc length are balanced, namely, the following conditions are met:
F3＝F1cosα+F2cosβ
namely:
F3＝σ(t1cosα+t2cosβ) (5)
the pressure container shell structure is in an equal stress state and needs to meet the requirement that the radial deformation of the shell is equal to the radial deformation of the fiber bundle at the intersection surface. For a spherical shell structure, when the internal stress is σ, the radial deformation Δ r thereof is, according to hooke's law:
Figure RE-GDA0003540188970000031
when the unit arc length of the wound fiber bundle is subjected to the radial force F of the unit arc length3Action, cross-sectional internal force:
F＝F3r1sinα
namely:
F＝σ(t1cosα+t2cosβ)r1sinα (7)
the radial displacement of the fiber bundle at this time is:
Figure RE-GDA0003540188970000032
formula 7 can be substituted for formula 8:
Figure RE-GDA0003540188970000033
by combining formula 6 and formula 9, one can understand:
Figure RE-GDA0003540188970000034
will be provided with
Figure RE-GDA0003540188970000035
Substituting the above formula and considering L ═ r1cosα+r2cosβ、t1sinα＝t2sin β can be obtained:
Figure RE-GDA0003540188970000036
drawings
FIG. 1 is a cross-sectional view of a filament wound intersecting spherical shell pressure vessel;
FIG. 2 and FIG. 3 are schematic perspective views of the preferred embodiment of the present invention;
wherein:
is a spherical shell of a pressure vessel
② winding fiber bundles
Detailed Description
The following detailed description of the preferred embodiments of the present invention with reference to fig. 2 and 3 is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, so as to clearly and clearly define the protection scope of the present invention.
The embodiment of the invention comprises the following steps:
example 1: a tank with a diameter of 3.35 meters, as shown in figure 2, comprising:
1) the diameter is 3.35 meters, the height is 6.95 meters, the spherical surface is formed by intersecting 4 spherical surfaces with equal diameters, the distance between the centers of the spheres is 1.2 meters, and the volume is 50.06m ^ 3;
2) the designed internal pressure is 1.0 MPa;
3) the thickness of each of the 4 spherical shells is 5mm of aluminum alloy material, the elastic modulus is 2700kg/m ^3, the Poisson ratio is 0.3, and the total weight of the aluminum shell is 987.4 kg;
4) winding a unidirectional carbon fiber bundle prepreg tape (the volume content of the fiber is 60%) at the position of 3 intersecting lines, wherein the unidirectional elastic modulus of the carbon fiber bundle is 135GPa, and the density is 1600kg/m ^ 3;
5) according to the formula disclosed by the invention, the cross section area of the carbon fiber bundle wound at each intersecting surface is 4149.5mm ^2, the weight of the single-turn fiber bundle is 65.2kg, and the total is 3 turns of 195.7 kg;
6) the weight of the whole storage box structure is 1183.2 kg;
7) for comparison, if the spherical shell storage tank is adopted, the spherical shell diameter is 4.573 meters, the thickness is 6.825mm and the weight is 1210.4kg when the same aluminum alloy is adopted under the same volume and equal strength state;
8) for comparison, if the structure form of cylinder and spherical bottom is adopted, the volume and the maximum diameter (3.35 meters) are equal, the length of the cylinder is 3.446 meters, the thickness is 10mm, and the total weight of the storage tank is 1455.2kg
9) The application case and the comparison thereof show that under the same volume and strength requirements, the weight of the storage box structure of the invention is superior to that of a spherical storage box and a cylindrical storage box, and the weight reduction is respectively realized by 2.25 percent and 18.69 percent;
10) due to the simple fiber bundle winding scheme, the production manufacturability of the storage box structure disclosed by the invention is superior to that of a pure composite material storage box structure.
Example 2: the fiber winding ring-shaped gas cylinder structure is shown in the attached figure 3 and comprises:
1) the annular pressure vessel with the maximum outer diameter of 1.2 meters consists of 6 intersected spherical shells with the diameter of 0.5 meter;
2) and carbon fiber bundles are wound at each intersection line for reinforcement.
3) The structure can be popularized and used for high-pressure gas cylinders with various special-shaped space designs and high space utilization rate.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (4)

1. A fiber-wound intersecting spherical shell pressure vessel structure; the method is characterized by comprising the following steps: firstly, a pressure container shell structure is formed by intersecting at least 2 spherical shells; secondly, winding high-rigidity fiber bundles on the outer wall of the intersection of each spherical shell; thirdly, according to the formula and the calculation method disclosed by the invention, the shell of the pressure container disclosed by the invention is of an equal stress structure, and the weight of the shell is obviously reduced compared with that of the traditional straight-tube pressure container.
2. A pressure vessel shell structure of at least 2 spherical shells intersecting according to claim 1, wherein: firstly, the spherical shell is formed by intersecting at least 2 spherical shells, and the number of the intersected spherical shells is not limited; the distance between the centers of the spherical shells is more than 0 and less than the sum of the outer radii of the two spherical shells; the radiuses of all spherical shells can be the same or different; the distance between the spherical centers and the relative position of each spherical shell are not limited and are not necessarily collinear, so that the space can be flexibly and effectively utilized; the ball shell material is not limited, and can be metal or nonmetal.
3. The method of claim 1, wherein the outer wall of each spherical shell at the intersection surface is wound with a high-rigidity fiber bundle, and the method comprises the following steps: firstly, when two spherical shells are intersected, the spherical shells at the intersection line are connected in a fastening way, generally in a metal welding way; secondly, winding the shell on the outer wall of the intersecting line position by using a high-rigidity fiber bundle; thirdly, when the cross section area of the fiber bundle is calculated according to the formula disclosed by the invention, the whole pressure container shell is in an equal stress structure under the action of equal internal pressure.
4. The invention discloses a cross-sectional area calculation formula of a wound fiber bundle according to claim 1, which is characterized in that: the calculation formula is:
Figure FDA0003473278630000011
referring to fig. 1, wherein:
r1、r2the radii of the middle surfaces of the two intersected spherical shells are respectively;
t1、t2the thicknesses of the two intersected spherical shells are respectively;
alpha and beta are respectively cone angles from the intersection line to the two sphere centers;
E. v is the elastic modulus and Poisson's ratio of the pressure vessel shell material respectively;
l is the distance between the centers of two intersected spherical shells;
Efis the modulus of elasticity in the direction of the wound fiber material 1;
and S is the cross-sectional area of the wound fiber bundle.
Secondly, when the spherical shells are made of different materials, the thicknesses of all parts are designed equivalently according to rigidity, and the strength requirements of all materials are required to be met.
CN202210049625.1A 2022-01-17 2022-01-17 Fiber winding intersecting spherical shell pressure container Withdrawn CN114383034A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920784A (en) * 1955-12-01 1960-01-12 Chicago Bridge & Iron Co Liquid storage vessel
US20040045970A1 (en) * 2000-02-04 2004-03-11 Andy Debecker Fibre-reinforced pressure vessel and method of manufacturing fibre-reinforced pressure vessel
JP2004324857A (en) * 2003-04-28 2004-11-18 Taihei Kogyo Co Ltd Multi-spherical shell type high pressure tank for pressure fluid
WO2013083661A2 (en) * 2011-12-05 2013-06-13 Blue Wave Co S.A. Cng store comprising composite pressure vessels
US20160238193A1 (en) * 2015-02-16 2016-08-18 Airbus Group Limited Pressure vessel
WO2018212647A1 (en) * 2017-05-15 2018-11-22 Advanced Lightweight Engineering B.V. Pressure vessel for the storage of pressurized fluids and vehicle comprising such a pressure vessel
CN109572981A (en) * 2018-12-28 2019-04-05 湖南航天远望科技有限公司 One kind is superb to force down resistance near space aerostatics
CN112149220A (en) * 2020-08-28 2020-12-29 江苏科技大学 Submersible pressure shell and design method thereof
CN112963534A (en) * 2021-03-30 2021-06-15 北京格锐德科技有限公司 Intersecting spherical shell pressure container with spherical shell partition plate
CN113028052A (en) * 2021-03-05 2021-06-25 北京格锐德科技有限公司 Intersecting spherical shell pressure container with partition plate
WO2021255041A1 (en) * 2020-06-17 2021-12-23 Plastic Omnium New Energies France Composite pressure vessel with reinforcement element
CN113915516A (en) * 2021-08-25 2022-01-11 江苏国富氢能技术装备股份有限公司 Carbon fiber fully-wound gas cylinder and carbon fiber winding method thereof

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920784A (en) * 1955-12-01 1960-01-12 Chicago Bridge & Iron Co Liquid storage vessel
US20040045970A1 (en) * 2000-02-04 2004-03-11 Andy Debecker Fibre-reinforced pressure vessel and method of manufacturing fibre-reinforced pressure vessel
JP2004324857A (en) * 2003-04-28 2004-11-18 Taihei Kogyo Co Ltd Multi-spherical shell type high pressure tank for pressure fluid
WO2013083661A2 (en) * 2011-12-05 2013-06-13 Blue Wave Co S.A. Cng store comprising composite pressure vessels
US20160238193A1 (en) * 2015-02-16 2016-08-18 Airbus Group Limited Pressure vessel
WO2018212647A1 (en) * 2017-05-15 2018-11-22 Advanced Lightweight Engineering B.V. Pressure vessel for the storage of pressurized fluids and vehicle comprising such a pressure vessel
CN109572981A (en) * 2018-12-28 2019-04-05 湖南航天远望科技有限公司 One kind is superb to force down resistance near space aerostatics
WO2021255041A1 (en) * 2020-06-17 2021-12-23 Plastic Omnium New Energies France Composite pressure vessel with reinforcement element
CN112149220A (en) * 2020-08-28 2020-12-29 江苏科技大学 Submersible pressure shell and design method thereof
CN113028052A (en) * 2021-03-05 2021-06-25 北京格锐德科技有限公司 Intersecting spherical shell pressure container with partition plate
CN112963534A (en) * 2021-03-30 2021-06-15 北京格锐德科技有限公司 Intersecting spherical shell pressure container with spherical shell partition plate
CN113915516A (en) * 2021-08-25 2022-01-11 江苏国富氢能技术装备股份有限公司 Carbon fiber fully-wound gas cylinder and carbon fiber winding method thereof

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