| 摘要 |
The invention relates to an oil pump driven by a hydraulic motor, that is itself driven by fuel pumped by a remote fuel pump through the engine fuel line. The hydraulic fuel driven oil pump is particularly advantageous for us e in a gas turbine engine, to reduce dependence on or completely eliminate the auxiliary gear box (AGB) conventionally used to mechanically connect various engine systems with an engine shaft. Separating the oil pump and other fuel/oil system components from the AGB enables the rationalization of these systems and allows designers to reconfigure systems into a compact unit including the oil pump, separator, oil tank, heat exchanger and filters for fuel and oil. Using pressurized fuel to hydraulically drive the oil pump fre es the oil system from location restraints and operating limitations, and permi ts recovery of otherwise wasted energy from the fuel bypass circuit during idli ng and takeoff. The close correlation between fuel flow and oil requirements eliminates the energy waste in conventional system which pump oil at rates dependant on the speed of the AGB and engine rotation.
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