METHOD AND DEVICE FOR MONITORING TORSIONAL VIBRATIONS OF A ROTARY SHAFT OF A TURBINE ENGINE

A method of monitoring twisting vibration of a rotary shaft of a turbine engine includes obtaining a vibratory acceleration signal from a sensor located on a stationary component of the turbine engine. This vibratory signal is characterized by a carrier frequency. The method also includes evaluating...

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Bibliographic Details
Main Authors GEREZ, Valerio, GRIFFATON, Julien Christian Pascal, JADCZAK, Edouard Joseph
Format Patent
LanguageEnglish
French
German
Published 10.10.2012
Subjects
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES
MEASURING
PHYSICS
TESTING
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Summary:A method of monitoring twisting vibration of a rotary shaft of a turbine engine includes obtaining a vibratory acceleration signal from a sensor located on a stationary component of the turbine engine. This vibratory signal is characterized by a carrier frequency. The method also includes evaluating a frequency spectrum of the vibratory signal and searching for a pair of spectral lines of amplitudes greater than at least a first threshold. The lines are distributed in the spectrum on either side of the carrier frequency of the vibratory signal, and spaced apart therefrom by a twisting frequency of the shaft. Where appropriate, the method includes issuing a warning message.
Bibliography:Application Number: EP20100799088