AIRCRAFT TURBOJET ENGINE CONTROL METHOD Russian patent published in 2019 - IPC F02C9/28 

FIELD: engines and pumps.

SUBSTANCE: invention relates to the field of aircraft engine industry, and in particular to the methods of regulating aircraft turbojet engines (TJE). In the method, on several instances of engines throughout the entire operating area, the frequency ranges of rotation of the low-pressure rotor with the high level of voltages in the engine parts and/or with a high level of vibrations of the buildings are determined, then for these ranges the signal to exclude the engine in them is formed, and according to this signal the pressure drop across the turbines is increased and at the same time the angle of installation of the inlet and guide vanes of the first stage of the low-pressure compressor are reduced to achieve rotational speeds exceeding the rotational frequency ranges of the low-pressure rotor with high voltages in the operating blades. For operation of the engine in the frequency ranges of rotation below the frequency range of rotation of the low-pressure rotor with the high level of voltages in the working blades reduce the magnitude of the pressure drop across the turbines and at the same time increase in the angle of installation of the input and guide vanes of the first stage of the low pressure compressor to achieve rotational speeds below the frequency range of rotation of the low pressure rotor with the high level of stresses in the blades. In this case, the signal for changing the pressure drop across the turbines and simultaneously changing the setting angle of the inlet and guide vanes is formed depending on the air temperature at the engine inlet.

EFFECT: method allows to exclude the range of frequencies of rotation of the low pressure rotor with the high level of stress in the engine parts and/or with the high level of vibration of the housings from the area of operation of the engine, which will lead to an increase in the reliability of the engine, a decrease in the level of vibrations and an increase in flight safety.

1 cl, 1 dwg