METHOD OF OPERATING GAS TURBINE ENGINE Russian patent published in 2012 - IPC F02C7/06 

FIELD: engines and pumps.

SUBSTANCE: proposed bypass gas turbine engine comprises turbocompressor assembly including rotor running in bearings, turbines and low- and high-pressure compressors coupled aligned shafts, main and afterburner combustion chambers, jet nozzle, ACS, and fuel and oil hydraulic systems provided with pumps assemblies. Pumps include one delivery pump and set of discharge pumps, suction and pressure oil lines, bypass valve and fuel-to-oil heat exchanger. Bearings and drive unit are equipped with oil cavities communicated with oil delivery line while oil system is furnished with water separators and oil tank communicated with suction line via oil intake. In engine starting, switched on are fuel system, one or both combustion chambers to actuate air feed and engine cooling system so that oil is forced into system via delivery pump and fuel-to-oil heat exchanger. Downstream of said heat exchanger, flow is divided into two parts, larger one being, preferably, directed to bearing and drive unit oil cavities and returned into oil tank via discharge pump and suction line. Note here that oil is cleaned from air admixtures by said air separators. Another part of said flow cooled in said heat exchanger is directed via bypass valve into delivery pump suction chamber bypassing suction line.

EFFECT: higher reliability and stability.

6 cl, 1 dwg