FIELD: aircraft engineering.
SUBSTANCE: group of inventions relates to aircraft engineering, namely, to aircraft water drain valve, and is intended to prevent fuel leakage in case of valve structures deformation and fuel tank in case of aircraft emergency crash landing. Aircraft water drain valve consists of fluid flow passage from aircraft fuel tank, stem, first sealing element and second sealing element arranged on said stem. Valve body is installed on fuel tank wall so that fuel tank wall external surface tightly adjoins aircraft skin inner surface. Valve is made with external lower ledge along the perimeter, tightly adjacent to aircraft skin external surface and having recess made along valve lower surface perimeter and creating weakened cross-section area. On the side of fuel tank inner space in parallel to fuel tank wall flat flexible membrane is tightly secured on valve body by means of main fixture. Membrane external perimeter is tightly secured on fuel tank wall inner surface, thus forming sealed cavity between valve body and aircraft fuel tank wall internal surface. There are also aircraft fuel tank with said valve and aircraft with such fuel tank.
EFFECT: group of inventions is aimed at improvement of drain valve operational characteristics during its operation in flight and landing emergency situations, aircraft fuel system increased reliability.
3 cl, 2 dwg
Title | Year | Author | Number |
---|---|---|---|
VALVE OF AIRCRAFT FOR DRAINAGE OF WATER, FUEL TANK OF AIRCRAFT, AIRCRAFT AND PROCEDURE FOR DRAINING WATER FROM FUEL TANK OF AIRCRAFT | 2006 |
|
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Authors
Dates
2016-11-10—Published
2015-06-25—Filed