Nonsynchronous turbine blade vibration monitoring system

Details Nonsynchronous turbine blade vibration monitoring system Nonsynchronous turbine blade vibration monitoring system

1988-06-03

1989-12-19

Tokar, Michael J.

Measuring and testing

Vibration

Sensing apparatus

324207, G01M 122, G01H 1100

Patent

active

048874680

ABSTRACT:
A nonsynchronous turbine blade vibration monitoring system is comprised of a maximum of two sensors circumferentially mounted along the turbine blade row for detecting the actual arrival times of the turbine blades at the sensors. Expected arrival times of the turbine blades at the sensors are determined and then compared to the actual arrival times in order to obtain turbine blade deflection data. Harmonic analysis is then performed on the blade deflection data to determine the level of vibration at each non-integral harmonic.

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Jones, Development of a Noninterference Technique for Measuring Turbine Engine Rotor Blade Stresses, AIAA 21st Joint Propulsion Conference (1985).

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