Cryogenic tank and aircraft structural interface

• US 3,979,005 A
• Filed: 03/17/1975
• Issued: 09/07/1976
• Est. Priority Date: 05/13/1974
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Whitener, Philip C., Robinson, Robert K.
• Primary Examiner(s): Price, William
• Assistant Examiner(s): Moy, Joseph M.
• Application Number:
  US05/558,578
• Time in Patent Office: 540 Days
• Field of Search: 220/9 LG, 220/16, 220/4 R, 220/3, 220/1 B, 220/22, 220/9 A, 220/DIG. 24, 114/74 R, 114/78, 244/135 R, 244/118 R
• US Class Current: 220/560.07
• CPC Class Codes: B64D 37/06 Constructional adaptations thereof
• CPC Class Codes: F17C 2201/0133 toroidal
• CPC Class Codes: F17C 2201/0166 divided in several chambers
• CPC Class Codes: F17C 2201/0171 comprising a communication hole between chambers
• CPC Class Codes: F17C 2203/015 Bars
• CPC Class Codes: F17C 2203/0333 Polyurethane
• CPC Class Codes: F17C 2203/0629 Two walls
• CPC Class Codes: F17C 2203/0639 Steels
• CPC Class Codes: F17C 2203/0646 Aluminium
• CPC Class Codes: F17C 2203/0648 Alloys or compositions of metals
• CPC Class Codes: F17C 2203/0663 in form of fibers or filaments
• CPC Class Codes: F17C 2221/012 Hydrogen
• CPC Class Codes: F17C 2221/033 Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
• CPC Class Codes: F17C 2223/0161 cryogenic, e.g. LNG, GNL, PLNG
• CPC Class Codes: F17C 2223/033 Small pressure, e.g. for liquefied gas
• CPC Class Codes: F17C 2260/012 Reducing weight
• CPC Class Codes: F17C 2260/015 Facilitating maintenance
• CPC Class Codes: F17C 2260/016 Preventing slosh
• CPC Class Codes: F17C 2270/0189 Planes
• CPC Class Codes: F17C 3/06 on the inner surface, i.e. in contact with the stored fluid
• CPC Class Codes: Y02E 60/32 : Hydrogen storage
• CPC Class Codes: Y10S 220/901 : Liquified gas content, cryogenic

Abstract

A cryogenic fuel tank of a cylindrical design having toroidal surface ends, is suspended in aircraft structure through a central front mount member; and the rear tank is supported by rod elements which extend from a mounting ring about the tank, to mount points rearwardly within the interior of the fuselage. The central front mount member has baffles attached thereto, so as to prevent undue sloshing of the liquid within the tank. The front end of the tank suspension absorbs radial and axial loads, but no bending moments; and the aft linkage suspension arrangement takes primarily radical and torsional loads. Also the aft suspension provides for unrestrained axial and radial contraction and expansion of the outer shell of the tank.

Claims

1. A container for fluids, comprising:

a cylindrical center section with toroidal-ring surface end members;

a baffle assembly positioned within the container to prevent undue sloshing of its contents;

said baffle assembly having a core structure interconnecting the toroidal-ring surface end members for supporting the baffle assembly in spaced relation to the interior wall surfaces of the container;

said baffle assembly core structure being supportably attached to the central portion of the toroidal-ring surface end members for reacting to sloshing fluid pressure loads imposed on the baffle assembly through said toroidal-ring centers.

2. The container as set forth in claim 1, including a thermal insulation layer fastened to the interior surface of the container and being under a residual compressive stress when the tank is empty, such that the thermal shock gradient caused by filling the tank with liquefied gas at cryogenic temperatures and the sudden contraction of the thermal insulation, does not result in the insulation cracking.

3. The container as set forth in claim 1, including plumbing lines entering into the interior of the container through a central opening in a toroidal-ring surface end member;

and said plumbing lines being supported within the container by said baffle assembly and its core structure, such that the outer shell of the container is not penetrated by said plumbing lines or support structure therefore.

4. The container as set forth in claim 1, wherein the baffle assembly is of a framework type construction and said core structure is hollow;

and including a hatch positioned centrally in a toroidal-ring surface end member for permitting access into the interior of the container through said hollow core structure.

5. A cylindrically-shaped fluid container comprising:

a cylindrical center section and toroidal-ring surface end members;

a baffle assembly having a core support structure;

said baffle assembly being mounted within the container in spaced relation to the interior wall surfaces of the container by said core structure interconnecting the toroidal-ring surface end members through their centers, so as to react the baffle assembly sloshing fluid pressure loads against the toroidal-ring surface end members and permit the toroidal-ring surfaces to work in relieving expansion and contraction forces on the container without abrasion of the baffle assembly; and

a structural support mounting ring for each end of the container;

said mounting ring being integral with the central portion of a toroidal-ring surface end member and fixedly secured to the end of the core structure of the baffle assembly.

6. A fluid container comprising:

an elongated cylindrically-shaped container having a cylindrical center section, and a first and a second toroidal-ring surface as end members;

a baffle assembly having a core support structure;

said baffle assembly being mounted within the container in spaced relation to the interior wall surfaces of the container by said core structure interconnecting the first and second toroidal-ring surface end members through their centers to react the baffle assembly sloshing fluid pressure loads against the toroidal-ring ends and to allow the toroidal-ring surfaces to work in relieving expansion and contraction forces in the container without abrasion of the baffle assembly;

a first mounting ring integral with the central portion of the first toroidal-ring surface end member and fixedly secured to the one end of the core structure of the baffle assembly for mounting the first end of the container to support structure; and

a second mounting ring rigidly secured around the outer periphery of the container for mounting the second end of the container through a circumferential series of attachment fittings to support structure.

7. A liquefied gas container comprising:

an elongated cylindrically-shaped container for the liquefied gas;

said container having a cylindrical center section and toroidal-ring surface end members;

a baffle assembly having a core support structure;

said baffle assembly being mounted within the container in spaced relation to the interior wall surfaces of the container by said core structure interconnecting the toroidal-ring surface end members through their centers to react the baffle assembly sloshing fluid pressure loads against the toroidal-ring ends and to allow the toroidal-ring surfaces to work in relieving expansion and contraction forces on the container without abrasion of the baffle assembly; and

a first and a second support structure for the container, each support structure being fastened to one end of the container through the central portion of a toroidal-ring surface member and to an end of the core structure of the baffle assembly.

8. An elongated cylindrically-shaped container for transporting liquefied gas, said container comprising:

an open-ended cylindrical center section;

toroidal-ring surface members fastened to said center section and enclosing the ends thereof;

a baffle assembly having a core support structure;

said baffle assembly being mounted within the container in spaced relation to the interior wall surfaces of the container by said core structure interconnecting the toroidal-ring surface end members through their centers to react the baffle assembly sloshing fluid pressure loads and to allow the toroidal-ring surfaces to work in relieving expansion and contraction forces on the container without abrasion of the baffle assembly;

a first support structure for one end of the container;

said first support structure being fastened to both the central portion of a toroidal-ring surface end member and to one end of the core structure of the baffle assembly;

a second support structure for the other end of the container;

said second support structure comprising a flange secured to the cylindrical center section around the outer periphery of the container; and

attachment fittings interconnecting the flange with said second support structure.