Vibration And Eccentricity Measurements Combined With Rotordynamic Analyses On A Six Bearing Turbine Generator.

Abstract

This lecture discusses how the vibration characteristics and eccentricity measurements were combined with rotordynamic analyses to help improve the reliability of a turbine generator unit. It also explains certain vibration characteristics at partial load conditions that resulted in changes of the bearing load magnitude and direction. The measurements of a stable backward whirl orbit at certain load conditions will be shown and discussed. The rotordynamic analyses also simulated field balancing measurements that compared well with the synchronous response calculations. These analyses were also used to examine the benefits of retrofitting a steady bearing at the unsupported shaft pump extension.