Shaft torsional vibration monitor for a multi-mass rotary shaft

Details Shaft torsional vibration monitor for a multi-mass rotary shaft Shaft torsional vibration monitor for a multi-mass rotary shaft

1988-03-28

1989-09-05

Levy, Stewart J.

Measuring and testing

Vibration

Sensing apparatus

G01N 2904

Patent

active

048627496

ABSTRACT:
A shaft torsional vibration monitor for a poly phase turbine generator and its prime mover turbine connected thereto comprises an electrical torque detector detecting electromagnetic torque applied to the turbine generator rotor, a memory unit capable of storing plurality sets of torque variation data due to system disturbances each having an initial torque variation rate more than a predetermined amount, a first processor fetching the sets of torque variation data one by one from the memory unit and determining the corresponding shaft torsional vibration and a second processor determining fatigue and life expectancy of the rotary shaft system for the turbine generator and its turbine by accumulating torsional stresses caused by respective shaft torsional vibrations.

REFERENCES:
patent: 4051427 (1977-09-01), Kilgore et al.
patent: 4267734 (1981-05-01), Shima et al.
patent: 4272992 (1981-06-01), Shima et al.
patent: 4276782 (1981-07-01), Shima et al.
patent: 4282756 (1981-08-01), Molnar et al.
patent: 4294120 (1981-10-01), Shima et al.

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