公开(公告)号：WO1995021712A1

公开(公告)日：1995-08-17

申请号：PCT/US1995001821

申请日：1995-02-09

Applicant: McDONNELL DOUGLAS CORPORATION ,  BABEL, Henry, Wolfgang ,  FUSON, Phillip, Lawrence ,  CHICKLES, Colin, Dean ,  JONES, Cherie, Ann ,  ANDERSON, Raymond, Hartwell

Inventor： McDONNELL DOUGLAS CORPORATION

IPC: B21D39/04

CPC classification number: F16L13/146 ,  B21D39/04 ,  Y10T29/49885 ,  Y10T29/49934

Abstract: A relatively impervious mechanical seal is formed between the outer surface of a tube (1, 3) and the inside surface of a mechanical fitting (7) of a high pressure fluid or hydraulic system by applying a very thin soft metal layer (19) onto the outer surface of the hard metal tube (1, 3) and/or inner surface of the hard metal fitting (7). The thickness of such thin metal layer (19) is independent of the size of the tube (1, 3) and/or fittings (7). Many metals and alloys of those metals exhibit the requisite softness, including silver, gold, tin, platinum, indium, rhodium, and cadmium. Suitably, the coating is about 0.0025 millimeters (0.10 mils) in thickness. After compression, the tube (1, 3) and fitting (7) combination exhibits very low leak rates on the order of 10 cubic centimeters per second or less as measured using the Helium leak test.

Abstract translation: 通过将非常薄的软金属层（19）施加到管（1,3）的外表面和高压流体或液压系统的机械配件（7）的内表面之间形成相对不可渗透的机械密封件 硬金属管（1,3）的外表面和/或硬金属配件（7）的内表面。 这种薄金属层（19）的厚度与管（1,3）和/或配件（7）的尺寸无关。 这些金属的许多金属和合金表现出必需的柔软度，包括银，金，锡，铂，铟，铑和镉。 适当地，涂层厚度约为0.0025毫米（0.10密耳）。 压缩后，使用氦泄漏试验测量的管（1,3）和配件（7）组合显示非常低的每秒10立方厘米或更低的泄漏率。