Shaft torsional vibration monitor for a multi-mass rotary shaft system
US4862749A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H1/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.