OIL SYSTEM OF GAS-TURBINE ENGINE WITH FREE TURBINE Russian patent published in 2006 - IPC F02C7/06 

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: proposed oil system is designed for gas-turbine engine with free turbine and it contains device to feed and pump out oil from oil spaces of supports of turbocompressor and free turbine. Device to pump out oil from spaces of supports of free turbine is made in form of two, one of which is driven by rotor of turbocompressor, and the other is furnished with electric drive. Suction lines of pumps are hydraulically interconnected through drain reservoir and are connected in parallel to oil spaces of free turbine supports. Drain reservoir communicates with breathing line in which normally open shutoff valve is installed communicating by control space with output of delivery oil pump providing delivery of oil into oil spaces of free turbine supports.

EFFECT: improved reliability of pumping out oil from oil spaces of bearing supports of free turbine owing to provision of possibility of correction of balance of delivery and pumping out of oil from power turbine under unstationary operating conditions of engine.