| 摘要 |
A fuel supply system for a gas turbine engine is disclosed which incorporates a discharge conduit into the fuel supply system such that an increase in the temperature of the fuel in the fuel injector conduits after engine shut-down will cause a valve in the discharge line to open before the opening of the valve in the fuel injector conduit, thereby directing excess fuel to a receiver or a tank, rather than into the hot combustion chamber. A fuel flow valve is connected to the fuel supply conduit, the discharge conduit, as well as the fuel injector conduits. Under normal operating conditions, a valve member within the fuel flow valve is positioned so as to enable communication between the fuel feed conduit and the fuel injector conduits so that fuel may be supplied to the fuel injectors. When the valve element is moved the a second position, after engine shut-down, it seals off the fuel feed conduit and enables communication between the fuel injector conduits and the discharge conduit. A valve in the discharge conduit is set so as to open at a slightly lower pressure than are the valves in the fuel injector conduits such that, if the fuel remaining in the fuel injector conduits is heated, its rise in pressure will cause the discharge valve to open before the opening of the fuel injector valve. Thus, a portion of the heated fuel may then be directed to a receiver or a tank.
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