FUEL FEED SYSTEM OF FLYING VEHICLE TURBOJET ENGINE Russian patent published in 2003 - IPC

FIELD: aircraft manufacture; fuel feed systems of turbojet engines. SUBSTANCE: proposed fuel feed system includes centrifugal pump and additional screw pump which are hydraulically connected by their inlets with hydraulically-driven pump of service tank; screw pump is mounted on shaft before said pump and is hydraulically connected with pumps of aircraft fuel tanks; inlet in form of pipe line is located above outer surface of screw wheel in area of its outlet section. Engine centrifugal pump is connected with engine through torque hydrodynamic converter whose shaft is kinematically linked with engine shaft and with shaft of engine centrifugal pump and is provided with power servopiston performing function of regulating member; servopiston is connected with fuel feed control supplying fuel to injectors of main combustion chamber; inner cavity of hydrodynamic converter is connected with inlet and outlet of engine centrifugal pump. Delivery cavity of engine centrifugal pump is connected with fuel feed control supplying fuel to injectors of main combustion chamber and with fuel feed control supplying fuel to injectors of afterburner. EFFECT: reduced losses of heat; enhanced operational reliability; reduced thermal notability of flying vehicle. 6 cl, 2 dwg