Method of vibration diagnosis and prognosis of sudden failure ENGINE AND MEDIA

摘要

FIELD: engines and pumps.;SUBSTANCE: at vibration diagnostics and forecasting of sudden failure as a result of damage to an inter-rotor bearing of the turbine jet engine containing two rotors and one inter-rotor bearing, vibrosignals of vibrospeed and/or vibroacceleration, which are installed at points of the engine housing, informative relative to the state of inter-rotor baring, are transformed to informative vibrosignals. Values showing correlation of informative vibrosignals and threshold values at diagnostics frequencies are calculated at diagnostics frequencies. During the calculation process, conversion of vibrosignals is performed to a spectrum by means of Fourier transformation; maximum values are extracted in it by means of spectrum analysis at diagnostics frequencies in the form of combination rotation frequencies of rotors and/or divisible by rotor rotation frequencies, each of which corresponds to one of the variety in relation to threshold values. The invention also refers to a carrier for performance of the method described in 1.;EFFECT: reduction of risk of sudden failure of the engine due to forecast failure of an inter-rotor bearing.;7 cl, 4 dwg