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US 5,548,959 AGranted
Adjustment valve for injecting fuel for a turbojet engine
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorMichel M. A. A. Lechevalier
Life of this patent
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Abstract
An adjustment valve is provided with a system able to prevent its piston from jamming. This piston (30) is fitted with a vane wheel (50) placed at its end and receiving a flow of air under pressure. The piston is thus in constant rotation inside the body (20) of the valve. Application is for the injection of fuels in turbojet engines.
Claims5
A control valve for controlling supply of fuel to a turbo-engine, comprising:
- a hollow body having at least one fuel inlet and at least one fuel outlet;
- a piston having end portions, axially slidably arranged in said hollow body, said piston having at least one cavity on a circumferential surface of said piston, said inlet and outlet being arranged in such a manner that said inlet and outlet are able to be communicated via said cavity;
- a member urging said piston toward a position in which said inlet and outlet do not communicate via said cavity;
- a vane wheel provided at one of said end portions of said piston;
- an intake provided around and facing said vane wheel, said vane wheel being driven by a pressure flow supplied in said intake;
- and
- positions and length along an axis of said piston of said vane wheel and said intake are determined in such a manner that area of said vane wheel receiving said pressure flow from said intake changes according to axial displacement of said piston.
4 more elements
Dependencies are inferred from the claim text.