METHOD OF PROTECTING GAS TURBINE ENGINE AGAINST SPINNING OF ITS ROTORS USING AUTONOMOUS PROTECTION UNIT Russian patent published in 2024 - IPC F02C9/46 

FIELD: engine building.

SUBSTANCE: invention relates to the field of gas turbine engine building and can be used in emergency protection systems of aircraft bypass two-shaft engines, in power gas turbine plants for marine and river vessels, gas turbine power plants, gas turbine blowers of main gas lines, etc. During operation of gas turbine engines, cases of overshoots of rotor rotation frequency are sometimes observed. Reasons for such overshoots are non-localized failures of actuating mechanisms of fuel dosing, leading to spontaneous increase of fuel consumption into the combustion chamber, which cannot be countered by the automatic control system of the engine. Spontaneous increase in fuel consumption can be so significant and instantaneous that the crew does not have time to analyse the readings of the monitors, and therefore cannot quickly affect the situation. Dangerous consequences include mechanical failure of rotating parts of the engine and overhang of non-localized fragments of the rotor outside the housing with high kinetic energy. To ensure flight safety and trouble-free operation of turbomachines, the use of autonomous units for protecting the engine against spinning of its rotors is in demand. It is important that the autonomous protection units have high reliability and prevent cases of false actuations, since this is often associated with engine shutdown in flight.

EFFECT: increased functional reliability of emergency protection of turbojet bypass two-shaft engine against spinning of its rotors, improving completeness and depth of control of operation of an autonomous protection unit, excluding its possible false actuations.

8 cl, 1 dwg