DEVICE TO CONTROL OIL SYSTEM OF GAS-TURBINE Russian patent published in 2006 - IPC F02C9/00 

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: proposed device to control oil system of gas-turbine engine includes heat exchanger, oil bypass valve, oil temperature transmitter and high-pressure rotor speed pickup n_hp. According to invention, device contains additionally takeoff gate for air getting into air-oil heat exchanger from outer loop of engine, fuel temperature transmitter, flight external conditions parameter pickup, first, second, third and fourth threshold devices. Output of speed pickup n_hp of high-pressure rotor is connected with input of first threshold device, output of oil temperature transmitter is connected with input of second threshold device, output of fuel temperature transmitter is connected with input of third threshold device, output of flight external conditions parameter pickup is connected with input of fourth threshold device, and outputs of first, second and third threshold devices are connected to input of OR logic unit, and outputs of second, third, and fourth threshold devices are connected to input of AND logic unit, and output of OR logic unit is connected to oil bypass valve and output of AND logic unit being connected to takeoff gate of air getting into air-oil heat exchanger. Altitude of aircraft flight and air pressure at engine input are used as flight external conditions parameter.

EFFECT: improved reliability of engine by maintaining preset temperature conditions of oil system within wider range at operation of engine.

3 cl, 1 dwg