United Technologies Corporation

Charles E Wiesner

Gerald P Dyer

Brian G Donnelly

A main flow divider valve for a main stage of a multi-stage combustor includes a cooling loop for flowing pilot fuel therethrough to remove heat from the main flow divider valve. Various construction details are disclosed which provide cooling of the main flow divider valve during pilot only operation of the multi-stage combustor. In a particular embodiment, the main flow divider valve includes a cooling loop disposed about a housing of the main flow divider valve. The cooling loop has an inlet in fluid communication with a first port of a relief valve and an outlet in fluid communication with the pilot fuel lines. The cooling loop receives a flow of pilot fuel during all operational conditions of the gas turbine engine.

Pilot fuel cooled flow divider valve for a staged combustor

A fuel delivery system (10) incorporates a fuel splitter valve assembly (30) including a first valve (40) having a selectively positionable spool (42) disposed therein for controllably metering fuel flow therethrough for delivery to a first combustion chamber (22) and a second valve (50) operative to pass a second portion of the fuel flow to a second combustion chamber (24) while maintaining at least a desired minimum pressure upstream of the first valve (40) whenever the second combustion chamber is in operation, and to shut-off fuel flow to the second combustion chamber whenever the second combustion chamber is not in operation.

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Glastonbury, CT, United States of America

Charles E Wiesner