United Technologies Corporation

Herbert W Tutherly

Charles F Stearns

A flow control device includes a housing (10) having a hollow metering valve element (55) disposed therewithin to control the effective flow area of the device. A pressure regulating valve element (70) is received within the metering valve element and maintains a relatively constant pressure drop so that a desired flow through the device may be set by a single adjustment of the position of the metering valve element.

Flow control device

The basic gas turbine engine hydromechanical fuel control is adaptable to different engine configurations such as turbofan, turboprop and turboshaft engines by incorporating in the main housing those elements having a commonality to all engine configurations and providing a removable block for each configuration having the necessary control elements and flow passages required for that particular configuration. That is to say, a block with the elements peculiar to a turbofan engine could be replaced by a mating block that includes those elements peculiar to a turboshaft engine in adapting the control for a turboshaft configuration. Similarly another block with those elements peculiar to a turboprop engine could replace any of the other blocks in adapting the control to a turboprop configuration. Obviously the basic control has the necessary flow passages terminating at the interface with the block and these flow passages mate with corresponding passages in the block.

Fuel control for gas turbine engines

The fuel flow for a turboprop or turboshaft engine is provided by a plurality of parallel circuits each of which supplies a portion of the fuel to the engine with different valves controlling the flow through each of the separate circuits. In the turboprop engine there is imposed on the parallel flow circuits a sensing device that determines the pressures in certain of the circuits and selects the appropriate pressure for signalling a pressure regulating valve whereby to vary the pressure drop through the fuel control.

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Windsor, CT, United States of America

Herbert W Tutherly