| 摘要 |
A fueldraulic metering valve uses pressurized liquid fuel to control flow of gaseous fuel to a jet engine combustion chamber. The valve has a disconnectable body defining a piston chamber and a cavity for an interchangeable venturi nozzle module, both disposed about a stroke axis. A servo valve controls flow of the liquid fuel through the piston chamber and supply and return ports. The liquid fuel drives a piston and pintle assembly to open and close off the throat of the venturi passageway, and thereby control metering of the gaseous fuel, which flow through separate intake and exhaust ports. The gas and liquid fuel are separated by a high temperature seal. The liquid fuel is routed through the piston and a special baffle to dissipate heat transferred to the seal and piston from the hot gaseous fuel. A LVDT position transducer provides feedback to the controller for correcting position error.
|
