STRESS RELIEVED WELDS IN POSITIVE EXPULSION FUEL TANKS WITH ELASTOMERIC DIAPHRAGM
    17.
    发明申请
    STRESS RELIEVED WELDS IN POSITIVE EXPULSION FUEL TANKS WITH ELASTOMERIC DIAPHRAGM 审中-公开
    应力消除在积极展开燃油箱与弹性膜

    公开(公告)号:US20170016574A1

    公开(公告)日:2017-01-19

    申请号:US14797352

    申请日:2015-07-13

    Abstract: A metallic positive expulsion fuel tank with stress free weld seams may include a first hemispherical shell with a first edge; a pressurized gas inlet attached to the first hemispherical shell; and a metallic cylinder with first and second edges attached to the first hemispherical shell along matching first edges by a first weld seam. The tank may also include a second hemispherical shell with a first edge attached to a fuel outlet fixture. An elastomeric diaphragm may be attached to the fuel outlet fixture on the second hemispherical shell. The second hemispherical shell may be attached to the second edge of the metallic cylinder along matching edges by a second weld seam thereby forming a positive expulsion fuel tank with two interior chambers separated by the elastomeric diaphragm. The first and second weld seams may be subjected to a localized post-weld stress relief heat treatment in which heating of the tank is confined to a distance of 2 inches (5.08 cm) of the first weld seam and a distance of 2 inches (5.08 cm) of the second weld seam such that the stresses in the first and second weld seams are relieved and the elastomeric diaphragm is unaffected by the heat treatment.

    Abstract translation: 具有无应力焊缝的金属正排出燃料箱可以包括具有第一边缘的第一半球壳; 连接到第一半球壳的加压气体入口; 以及金属圆筒,其第一和第二边缘通过第一焊缝沿着匹配的第一边缘附接到第一半球形壳体。 罐还可以包括第二半球形壳体,其第一边缘连接到燃料出口固定装置。 弹性体隔膜可以附接到第二半球形壳体上的燃料出口固定装置。 第二半球壳可以通过第二焊缝沿着匹配的边缘附接到金属圆筒的第二边缘,从而形成具有由弹性体隔膜分隔开的两个内部腔室的正向排出燃料箱。 第一和第二焊缝可以经受局部焊后应力消除热处理,其中罐的加热被限制在第一焊缝的2英寸(5.08cm)的距离和2英寸(5.08)的距离 cm),使得第一和第二焊缝中的应力被释放,并且弹性体隔膜不受热处理的影响。

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