EP0550951B1 - Improved boss for a filament wound pressure vessel - Google Patents

Improved boss for a filament wound pressure vessel Download PDF

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Publication number
EP0550951B1
EP0550951B1 EP92307243A EP92307243A EP0550951B1 EP 0550951 B1 EP0550951 B1 EP 0550951B1 EP 92307243 A EP92307243 A EP 92307243A EP 92307243 A EP92307243 A EP 92307243A EP 0550951 B1 EP0550951 B1 EP 0550951B1
Authority
EP
European Patent Office
Prior art keywords
liner
boss
annular flange
flange
vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92307243A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0550951A1 (en
Inventor
Norman L. Newhouse
Ronald B. Veys
Dale B. Tiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technical Products Group Inc
Original Assignee
Technical Products Group Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technical Products Group Inc filed Critical Technical Products Group Inc
Publication of EP0550951A1 publication Critical patent/EP0550951A1/en
Application granted granted Critical
Publication of EP0550951B1 publication Critical patent/EP0550951B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F17C1/16—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
    • 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
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • 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
    • 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
    • F17C2203/0673—Polymers
    • 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
    • F17C2209/2109—Moulding
    • F17C2209/2118—Moulding by injection
    • 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
    • F17C2209/2109—Moulding
    • F17C2209/2127—Moulding by blowing
    • 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
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • 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
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/044—Avoiding pollution or contamination
    • 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
    • F17C2260/05—Improving chemical properties
    • F17C2260/053—Reducing corrosion

Definitions

  • the present invention relates to a boss system for a pressure vessel.
  • Filament wound vessels often are constructed in a spherical shape or a cylindrical shape with generally spherical ends for use in high pressure applications.
  • a boss is used to reliably join the internal liner with the outer composite shell at pressurization ports in the outer shell such that fluid is prevented from penetrating between the liner and the shell.
  • composite pressure vessels are required to contain extremely high pressures, operating at 25,000 p.s.i. (1722 bar) with design burst values in the range of 50,000 p.s.i. (3444 bar). Consequently, as internal pressure increases, the interface of the boss, the liner and the outer shell is subjected to extreme structural loading.
  • a boss system for a pressure vessel having a filament wound outer shell and a non-metallic internal liner comprising a boss having a tubular neck projecting outwardly through an opening in the outer shell, and an annular flange extending radially from an end of the neck within the vessel, the annular flange having an outer surface for reinforcing the perimeter of the opening in the shell.
  • a boss system as generally disclosed above which is characterized by a first generally dovetail-shaped locking groove in the outer surface of the annular flange, a second generally dovetail-shaped locking groove in an inner surface of the annular flange, the liner being split at the annular flange with an outside portion outside the annular flange and an inside portion inside the annular flange, a first generally dovetail-shaped tab on the outside portion of the liner for locking in the first locking groove in the outer surface of the annular flange, and a second generally dovetail-shaped tab on the inside portion of the liner for locking in the second locking groove in the inner surface of the annular flange.
  • an offset attachment flange extends radially from the annular flange, and the two locking grooves are provided on each of two axially opposite offset surfaces of the attachment flange.
  • the locking groove in the outer surface of the attachment flange opens outwardly and the locking groove in the inner surface of the attachment flange opens inwardly, with each of the locking grooves having a bottom wall intermediate a pair of mutually skewed sidewalls for maintaining positive engagement with the liner.
  • a non-metallic shear stress relieving layer may be interposed between the outer surface of the annular flange and the inner surface of the outer shell.
  • the interposed layer may be made of any plastic, thermosetting elastomeric, or other non-metallic material, and may be manufactured by a moulding process or cut from sheet stock.
  • the annular flange has a diameter sufficient to prevent damage to the outer shell when the vessel is pressurized and is sufficiently thick to avoid unacceptable levels of bending stress in the annular flange and the attachment flange.
  • the boss may be made from alloys of aluminium, steel, nickel, titanium, or other metals.
  • FIGURE 1 is fragmentary sectional view of the rounded end of an axisymmetric pressure vessel having a boss system which incorporates the features of the present invention.
  • the pressure vessel 10 is comprised of a fibre reinforced outer shell 12 and a non-metallic internal liner 14.
  • a boss 16 extends outwardly through a polar opening 18 formed in the outer shell 12 and defines a pressurization port 20 through which fluid at high pressure may be communicated with the interior of the pressure vessel 10. It is to be noted, however, that the invention may be used in connection with non-polar openings in vessels, as, for example, an opening in a purely spherical vessel.
  • a thin shear accommodating layer 22 is interposed between the outer shell 12, the boss 16 and the liner 14 to prevent damage to the shell or liner during pressurization of the vessel, as will be described hereafter.
  • the outer shell 12 comprises a generally known composite reinforcement made of fibre reinforcing material in a resin matrix.
  • the fibre may be fibreglass, ARAMID, carbon, graphite, or any other generally known fibrous reinforcing material.
  • the resin matrix used may be epoxy, polyester, vinylester, thermoplastic or any other suitable resinous material capable of providing the fragmentation resistance required for the particular application in which the vessel is to be used.
  • the internal liner 14 may be made of plastic or other elastomers and can be manufactured by compression moulding, blow moulding, injection moulding or any other generally known technique.
  • the boss 16 preferably is composed of an alloy of aluminium, steel, nickel, or titanium, although it is understood that other metal and non-metal materials, such as composite materials, are suitable.
  • the thin layer 22 may be made of plastic, or other non-metallic material and may be manufactured by a moulding process or, alternatively, cut from sheet stock.
  • the subject boss 16 has an outwardly projecting neck 24 with a tapered throat 26 extending through the polar opening 18 in the outer shell 12.
  • the throat 26 is tapered so as to form a concave peripheral groove for receipt of the fibre and resin matrix which make up the shell so that the latter captures the boss 16 to prevent movement of the boss into or out of the vessel 10.
  • annular support flange 28 radiates from the neck 24 and defines an outer surface 30 of the support flange 28 by which pressurization loads are distributed about the perimeter of the polar opening 18 in the composite shell 12.
  • the support flange 28 has a width W1 such that the overall diameter of the support flange 28 is sufficient to prevent damage to the outer shell 12 when the pressure vessel 10 is pressurized.
  • a portion of the thin layer 22 is interposed between the support flange 28, the liner 14 and the outer shell 12 to further minimize damage as the vessel is pressurized. Specifically, pressurization of the vessel interior results in expansive distortion of the rounded vessel end, such that relative slip between the inner surface of the outer shell 12 and the mating portions of the liner 14 and the support flange 28 may occur. In order to accommodate the relative slip and relieve shear stresses otherwise occurring at this interface, the interposed layer 22 extends across the rounded vessel end a distance substantially equal to the diameter D1 of the circular section of the pressure vessel 10.
  • An annular attachment flange 32 projects radially outward from the support flange 28 a distance W2.
  • the attachment flange 32 has an outer surface 34 which is inwardly offset from the outer surface 30 of the support flange 28 by a distance T1
  • the attachment flange 32 has an inner surface 36 which is outwardly offset from an inner surface 38 of the support flange 28 by a distance T2.
  • the support flange 28 has a thickness T3 which is sufficient to limit bending stresses in the boss to an acceptable level when the vessel is pressurized.
  • a pair of annular locking grooves 40 and 42, respectively, are located one in the outer surface 34 of the attachment flange 32 and the other in the inner surface 36 of the support flange 38. Each groove receives a complementary tab 44,46, respectively, on the internal liner 12.
  • the locking groove 40 is an outwardly opening groove having a bottom wall 48 intermediate a pair of mutually skewed sidewalls 50, which is to say the groove 40 is a dove-tailed groove. It is understood that other undercut features effective to mechanically lock the liner to the boss are contemplated by the present invention.
  • the locking groove 42 is formed in the inner surface 36 of the attachment flange 32 and has a bottom wall 52 intermediate a pair of mutually skewed sidewalls 54 to again define a dove-tail groove.
  • the complementary geometry of the skewed sidewalls 50 and 54 and respective liner tabs 44 and 46 ensure positive engagement and retention of the internal liner 14 on the boss 16 such that pressurized fluid is prevented from leaking between the liner and the outer shell 12.
  • the offset characteristic of the attachment flange 32 as defined by the inward offset T1 of the outer surface 34 and the outward offset T2 of the inner surface 36 reduces the risk that the liner 14 will extrude out of engagement with the boss 16 when under pressure by providing a sufficient surface area for the liner to seal with the attachment flange and prevent leakage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Motor Or Generator Frames (AREA)
EP92307243A 1992-01-10 1992-08-07 Improved boss for a filament wound pressure vessel Expired - Lifetime EP0550951B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US81861992A 1992-01-10 1992-01-10
US818619 1992-01-10
US90272592A 1992-06-23 1992-06-23
US902725 1992-06-23

Publications (2)

Publication Number Publication Date
EP0550951A1 EP0550951A1 (en) 1993-07-14
EP0550951B1 true EP0550951B1 (en) 1995-11-15

Family

ID=27124285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92307243A Expired - Lifetime EP0550951B1 (en) 1992-01-10 1992-08-07 Improved boss for a filament wound pressure vessel

Country Status (14)

Country Link
EP (1) EP0550951B1 (pt)
JP (1) JP3517789B2 (pt)
CN (1) CN1032273C (pt)
AT (1) ATE130421T1 (pt)
AU (1) AU653639B2 (pt)
BR (1) BR9204294A (pt)
CA (1) CA2080856C (pt)
DE (1) DE69206114T2 (pt)
EG (1) EG20012A (pt)
HU (1) HU214759B (pt)
MX (1) MX9300077A (pt)
MY (1) MY110573A (pt)
NZ (1) NZ245515A (pt)
RU (1) RU2091648C1 (pt)

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CN107420739A (zh) * 2017-07-17 2017-12-01 杭州余杭獐山钢瓶有限公司 一种气瓶
DE102022211155A1 (de) 2022-10-20 2024-04-25 Mahle International Gmbh Druckbehälter, Herstellverfahren für einen Druckbehälter sowie Fahrzeugbauteil mit demselben

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KR101856323B1 (ko) * 2016-05-18 2018-05-10 현대자동차주식회사 투과가스 배출구조를 구비한 압력용기
CN106870932A (zh) * 2017-02-17 2017-06-20 安徽绿动能源有限公司 一种金属瓶口结构和复合气瓶
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
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CN110220104A (zh) * 2019-05-31 2019-09-10 亚普汽车部件股份有限公司 高压复合容器及其制造工艺
CN110259943B (zh) * 2019-07-22 2024-03-29 中材科技(成都)有限公司 一种复合结构压力容器
CN111649226A (zh) * 2020-06-15 2020-09-11 安徽绿动能源有限公司 一种塑料内胆纤维全缠绕气瓶及其制作方法
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DE102022211155A1 (de) 2022-10-20 2024-04-25 Mahle International Gmbh Druckbehälter, Herstellverfahren für einen Druckbehälter sowie Fahrzeugbauteil mit demselben

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CN1074281A (zh) 1993-07-14
CA2080856A1 (en) 1993-07-11
CA2080856C (en) 2001-01-30
RU2091648C1 (ru) 1997-09-27
MY110573A (en) 1998-08-29
EG20012A (en) 1997-02-27
AU2631992A (en) 1993-07-15
NZ245515A (en) 1994-12-22
EP0550951A1 (en) 1993-07-14
BR9204294A (pt) 1993-07-13
DE69206114T2 (de) 1996-04-18
HU214759B (hu) 1998-05-28
AU653639B2 (en) 1994-10-06
HUT72870A (en) 1996-05-28
ATE130421T1 (de) 1995-12-15
JP3517789B2 (ja) 2004-04-12
DE69206114D1 (de) 1995-12-21
HU9300040D0 (en) 1993-04-28
JPH06137433A (ja) 1994-05-17
CN1032273C (zh) 1996-07-10
MX9300077A (es) 1993-12-01

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