Classifications

• • 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
  • F17C1/04—Protecting sheathings
  • F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D90/00—Component parts, details or accessories for large containers
  • B65D90/02—Wall construction
  • B65D90/04—Linings
• • 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
  • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
• • 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
  • F17C2201/0104—Shape cylindrical
  • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
• • 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
  • F17C2201/05—Size
  • F17C2201/056—Small (<1 m3)
• • 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
  • F17C2203/0602—Wall structures; Special features thereof
  • F17C2203/0604—Liners
• • 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
  • F17C2203/0646—Aluminium
• • 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
  • F17C2203/0648—Alloys or compositions of 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
  • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
  • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
  • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
  • F17C2205/0305—Bosses, e.g. boss collars
• • 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
  • F17C2209/227—Assembling processes by adhesive means
• • 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
• • 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
  • F17C2221/00—Handled fluid, in particular type of fluid
  • F17C2221/01—Pure fluids
• • 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
  • F17C2221/00—Handled fluid, in particular type of fluid
  • F17C2221/03—Mixtures
• • 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
  • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
  • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
  • F17C2223/0146—Two-phase
  • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
  • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
• • 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
  • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
  • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
  • F17C2223/035—High pressure (>10 bar)
• • 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
  • F17C2260/00—Purposes of gas storage and gas handling
  • F17C2260/01—Improving mechanical properties or manufacturing
  • F17C2260/011—Improving strength
• • 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
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0186—Applications for fluid transport or storage in the air or in space
• • 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
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0186—Applications for fluid transport or storage in the air or in space
  • F17C2270/0194—Applications for fluid transport or storage in the air or in space for use under microgravity conditions, e.g. space

Definitions

• the present invention relates to a reservoir comprising a reservoir body, a liner and a composite body wound on the liner, and at least one base and in particular the connection between a metal liner and a composite structure in the base zone of a reservoir and applies in particular to a high-performance tank of composite materials, including a tank for high pressure fluid.
• the invention relates to the field of high performance composite wound tanks for the storage under pressure of fluids, in particular for space applications, and even more particularly for the pressurized storage of cryogenic fluids.
• High performance tanks mean tanks optimized in terms of mass, such as those used in transport industries in general, and space transport in particular.
• High performance composite tanks for the storage of pressurized fluids are generally designed by separating the sealing and mechanical resistance functions from pressure.
• These tanks comprise a shell in principle thin metal or polymer called “liner” which is responsible for ensuring the confinement of the fluid and in particular the sealing and / or the protection of the composite material wall of the tank vis-à-vis fluid.
• this shell is thin because it does not normally structural mechanical function and we try to minimize the masses .
• These tanks further comprise a winding of composite fibers which are then deposited by filament winding on the liner.
• the role of this coil is to ensure the mechanical strength under pressure of the tank.
• US 6,401,963 describes an example of a tank comprising such a liner covered with a composite fiber winding.
• a problem of these tanks is that of the behavior of the liner during the use of the tank and in particular successive filling and emptying, which solicit the liner alternately in compression and traction.
• the emptying operations result in compression of the liner by the composite.
• the liner may have a thickness sufficient to withstand this compression without flaming due to the technological minimum usable and the use of the liner as a winding tool.
• the liner can not support this compression and it is then necessary to bind the liner to the composite in general by gluing.
• the total deformation of the liner, bound on one side to the composite and the other on the base, can become very important.
• the level of deformation in the liner is further accentuated by the differential thermal expansions between the metal liner and the composite shell. This high level of deformation can lead to leakage problems during successive operating cycles in pressure and temperature.
• the composite can then move freely, sealing and maintaining the bases being provided by the liner.
• the liner is glued to the composite, there is found, at the bases, a very strong increase in deformation in the liner associated with very high stresses in the connection bonded between the base and the composite.
• a conventional bonding is no longer suitable, and must be interposed a layer of material capable of ensuring the compatibility of the deformations by its flexibility in shear.
• This layer of a material called "shear fold" is conventionally an adhesive or an elastomeric fold retained for its flexibility.
• the present invention therefore aims to define a connection between liner and composite, and between liner, composite and base of a tank or capacity, in the case of high performance high pressure tanks optimized in terms of mass.
• This connection has the characteristic of not using elastomeric bonding between the composite and the tank base.
• the invention particularly aims to allow the design of large cryogenic tank using composite materials.
• the object of the invention is to make it possible to use a metal liner of very small thickness and whose minimum thickness is defined by the fatigue life requirements of the reservoir in terms of fatigue and damage tolerance.
• the present invention proposes to make a junction between a tank body, comprising a liner and a composite body wound on the liner, and a base of said tank for which the liner and the composite body are glued one on the other except for an annular region surrounding the base.
• the invention thus relates to a reservoir comprising a reservoir body, a liner and a composite body wound on the liner, and at least one base for which the liner and the composite body are glued to each other except for an annular region of junction, between the tank body and the base, surrounding the base.
• the invention ensures that the sealing in the base zone has the same robustness and reliability as the existing solutions on smaller tanks and ensuring non-cryogenic fluid storage.
• the tank is of generally cylindrical shape with curved ends, at least one of the ends comprising the base and the annular junction region surrounding the base.
• the liner is connected to the base by welding or gluing.
• the base comprises a collar, the wound composite body extending on the collar without being secured to this collar.
• the composite body ends at the base by a bead bearing on the flange.
• the base advantageously comprises a central cylindrical neck on which is mounted a flange retaining the bead.
• annular seal is disposed between the flange and the bead.
• the collar is of decreasing thickness towards its periphery.
• a layer of low friction material is disposed between the liner and the composite body and between the collar and the composite body.
• the low friction material is ribbon
• PTFE (acronym for polytetrafluoroethylene).
• the liner is made of pure aluminum in the annealed state.
• the liner is made of aluminum type 1050-O or 1 100-O or 1050H1 11.
• the invention furthermore relates to a method of manufacturing the tank for which a step of assembling a liner with a base is carried out, then a composite body is wound on the liner and a step of bonding the liner and the body is carried out. composite on the other except for an annular region of junction, between the tank body and the base, surrounding the base.
• the method is advantageously such that after the step of assembling the liner and the base, a material with a low coefficient of friction is applied to said annular region of junction, between the tank body and the base, surrounding the base before winding the composite body and bonding the liner and the composite body.
• Figure 1 a perspective view cut from the top of a tank according to the invention
• Figure 2 a sectional view of a detail of Figure 1;
• FIGS. 3A to 3D schematic sectional views of a segment of the annular junction region of the reservoir of FIG. 1;
• FIG. 4 a sectional view of a segment of a variant of the annular junction region of the reservoir of FIG. 1;
• FIG. 5 a deformation curve at the junction region of the reservoir of FIG. 1.
• Figure 1 shows the top of a tank according to the invention comprising a tank body 1, a liner 2 and a composite body 3 wound on the liner.
• the tank is of generally cylindrical shape with curved ends, at least one end having a base 4.
• the base 4 at the top of the tank serves for example to receive tank connection means for filling or emptying.
• the composite body is made by winding composite fibers such as carbon fibers impregnated with resin and the composite body is wound on the liner and glued (19) on the liner.
• the liner 2 and the composite body 3 are glued to one another on the cylindrical portion 19 and on a portion of the curved surface forming the dome of the reservoir comprising the base but are not glued on. an annular region 5 of junction between the tank body and the base, this annular region surrounding the base.
• the annular region is more particularly represented in FIG. 2, seen in section from the top of the reservoir, this annular region 5 extending towards the base above a collar 7 of the base or base collar which designates the end. device of the base, flange called base flange in the language of the field of the invention and the wound composite body extending on the flange without being secured to the flange.
• the annular region for which the composite body is detached from the liner and the collar 7 of the base 4 is more particularly shown in Figures 3A to 3D according to the conditions of use of the reservoir.
• FIG. 3A represents the upper part of the reservoir comprising the annular region in section in a resting state, zero pressure and ambient temperature.
• the liner contracts in the direction A and the composite body rises against a flange 11 for retaining the body composite.
• a layer 13 of material with a low coefficient of friction or anti-adherent is disposed between the liner and the composite body and between the flange and the composite body.
• This material with a high coefficient of friction is, for example, PTFE tape deposited around the base and on the end portion of the liner by helical deposit once the liner and the collar joined together by welding or gluing at their junction line. 6.
• the composite body ends at the base by a bead 9 supported on the flange 7 and retained by the flange 1 January.
• the flange 1 1 for retaining the bead is mounted on a central cylindrical neck 10 of the base.
• An annular seal 12 is disposed between the flange and the bead so that the flange moderately presses on the bead to maintain it in a vertical direction parallel to the axis of symmetry of the base.
• the neck of the base and the flange may be provided with complementary threads to mount the flange by screwing and thus adjust the support of the flange on the bead.
• the flange can also be glued at 14 on the neck of the base.
• the flange or base flange 7 is of decreasing thickness towards its periphery.
• the material properties of the liner will include the following specificities:
• Pure aluminum in the annealed state (1050-O or 1100-O or 1050H11) is the preferred candidate for this liner, including in the cryogenic case.
• aluminum alloys are designated using a four digit numerical system that identify the chemical composition of the alloy.
• the 1000 series means at least 99% aluminum.
• the second number indicates a variant of the initial alloy. Often it is a smaller fork in one or more elements of the alloy.
• the third and fourth digits indicate, for the 1000 series, the minimum percentage of aluminum, for example 1050 indicating at least 99.50% aluminum.
• the aluminum alloy parts obtained by deformation are classified in the metallurgical state. There are five standardized states, classified by a letter.
• the letter “O” means "annealing”.
• the letter "H", which means "hard”, is followed by two or three digits.
• the first number indicates the type of thermomechanical range.
• the second number gives the degree of hardening and therefore the degree of mechanical characteristic.
• the optional third digit designates a variant.
• An exemplary application of the invention is a cryogenic capacity of 1600mm diameter with a 1050-O aluminum liner of thickness 1 mm.
• the capacity is realized to have a working pressure of 40 bars and a breaking pressure of 80 bars.
• FIG. A shutter 15 closes the endpiece 4 and is fixed to this endpiece a connection zone 16.
• the flange 11 fixed on the neck of the base 10 is supported on the bead 9 of the wound body via an interposition material 12 intended not to injure the composite.
• the wound body covers the flange of the base and the upper part of the liner without being stuck to it, a possible material 13 with a low coefficient of friction being interposed between the wound body and the collar / wing assembly and upper part of the liner.
• the radius of the base at the neck of the base is of the order of 196 mm
• the flange extends beyond the base about 100 to 120 mm
• the unbonded area extends to at a distance from the axis of revolution Z of the capacitance such that the radius of the capacitance is R500 to 510 mm at this point.
• the thickness of the liner is kept constant in the unbonded area to minimize the peak of deformation.
• the variations of possible thicknesses are localized in the zone where the liner is stuck on the capacity.
• the liner comprises, according to this example, a thickness e1 of 1.4 mm in the unglued zone and e2 of 1 mm on the remainder of the reservoir, which gives a behavior compatible with the desired application.
• the liner is made of a high elastic limit material, for example an aluminum alloy 2219-T87 which means that the element of The main alloy is copper and the main phase present in the alloy is AI 2 Cu - AI 2 CuMg, T meaning that this alloy has undergone heat treatment.
• a high elastic limit material for example an aluminum alloy 2219-T87 which means that the element of The main alloy is copper and the main phase present in the alloy is AI 2 Cu - AI 2 CuMg, T meaning that this alloy has undergone heat treatment.
• the functions of the flange 11 are in particular to prevent the introduction of forces on the liner and the glued connection during the non-pressurized phases, during the manufacture and / or the integration of the capacity, to keep the base integral with the bead when cold and allow movement of the bead under the action of internal pressure.
• Figure 6 shows the result of the calculation in terms of cumulative plastic deformation of the liner along the Z axis from the origin to the base area for the positive abscissae.
• Curve 21 represents the deformation along the liner during cooling
• the curve 20, denoted 40b represents the deformation during the cold pressurization
• the curve 22, referred to as the return 0b represents the deformation during the return to zero pressure, always cold
• RT liner represents the deformation after returning to ambient temperature.
• the zero point of the abscissa is the plane where the cylindrical part of the tank joins the bottom (where the bottom begins) and this point is called the "reference background”.
• the negative abscissae correspond to the cylindrical part of the tank, the positive ones to the bottom.
• Point 24 of Figure 6 is the stopping area of the gluing. It appears close to point 25 because the graph shows the axial abscissa.
• the solution of the invention eliminates the elastomeric solutions of the state of the art that are not applicable in the case of cryogenic tanks.
• the materials for producing the wound composite body are, for example, carbon fiber intermediate module type T800 from the company Toray (registered trademark) or IM7 from the company Hexel (registered trademark), many variants being possible.
• the bonding of the composite body and the liner is carried out with an epoxy adhesive from the company Hysol (registered trademark) EA9321.
• FIG. 5 corresponds to a variant of the invention for which the liner is made in two parts 2, 2 'glued at 17, the second part forming an annular segment connecting the first part of the liner to the flange 7 of the base 4 .
• the composite body is glued on the first part of the liner and the bonding of the composite body is extended on the second part 2 'of the liner in an overlap zone of the two parts of the liner.
• the composite body covers the second portion 2 'of the liner and the flange 7 of the base without being glued.
• This embodiment makes it possible to achieve an extra thickness of the liner in the second portion 2 'to increase the mechanical strength of the reservoir.
• a step is taken to assemble a liner 2 with a base 4 and then a composite body 3 is wound on the liner and a liner 2 and composite body 3 bonding step is carried out. on the other except for an annular region 5 of junction, between the tank body and the base, surrounding the base.
• a material with a low coefficient of friction is applied to said annular joining region 5, between the reservoir body and the base, surrounding the base before winding the composite body and bonding the liner and the composite body.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)

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Publications (1)

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Citations (5)

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• 2010
  • 2010-08-03 FR FR1056418A patent/FR2963659B1/fr active Active
• 2011
  • 2011-08-01 EP EP11737977.6A patent/EP2601434B1/fr active Active
  • 2011-08-01 JP JP2013522223A patent/JP5948330B2/ja active Active
  • 2011-08-01 US US13/813,541 patent/US20130186893A1/en not_active Abandoned
  • 2011-08-01 WO PCT/EP2011/063238 patent/WO2012016956A1/fr not_active Ceased

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