ENHANCEMENT OF THE RELIABILITY OF DIAGNOSING THE SURGE STATE OF A GAS TURBINE COMPRESSOR Russian patent published in 2023 - IPC F04D27/02 G01M15/14 

FIELD: engine construction.

SUBSTANCE: engine construction, used in systems for diagnosing the technical condition of a gas turbine engine (GTE), in particular for diagnosing its surge state. Enhancement of the efficiency of diagnosing the surge state of a gas turbine compressor, in which the diagnostic frequency is preliminarily determined, which is taken as the frequency of the rotating stall, and the threshold level of the signal from the vibration transducer is set at the diagnostic frequency, signals from the vibration transducer are measured during testing and a static pressure pulsation sensor installed on the engine compressor casing, a component at the diagnostic frequency in the spectrum of the signal from the vibration transducer and a component in the spectrum of the signal from the pressure pulsation sensor are looked for, the conclusion about the engine surge state is made when the amplitude of the signal from the vibration transducer at the diagnostic frequency reaches the threshold level and the presence of a component in the spectrum of the signal from the pulsation sensor, in contrast to the known one, is unstable before testing at a predetermined maximum value of the frequency range. To ensure reliable operation of the compressor, the rotor speed is set, up to which, during the tests, the signals from the vibration transducer and the static pressure pulsation sensor are measured, the component at the diagnostic frequency is obtained in the signal spectrum from the pressure pulsation sensor, and the component at the double diagnostic frequency is additionally obtained in the signal spectrum from the vibration transducer, conclusion on the surge state of the engine is made if there is a component at the diagnostic frequency in the spectrum of the signal from the pressure pulsation sensor and if there is a component at the double diagnostic frequency in the signal spectrum from the vibration transducer.

EFFECT: enhancement of the reliability of diagnosing the surge state of a gas turbine engine, excluding the possibility of breakdowns of compressor parts during testing, and reducing the method complexity.

3 cl, 4 dwg