We have Turbine Generator Set 10 MW Capacity. Rated RPM : 3000
We analyse the Unbalance in Generator Rotor.
During no trail weight we could not Cross the 1400 RPM
But After adding Weight of 160 gms. @180 deg. on Generator Front side we are able to cross the 2130 rpm Critical Speed. And could run up to the 2850 RPM.
But only capture the readings @ up to 2500 RPM.
Now base on these 2 sets of readings what should be the Calculated Mass and angle to bring down the vibration levels @ 3000 RPM.
Attached sheet showing readings for both trials @ different Speed
Readings are taken directly from Bentley Panel.