Thank you very much guys for throwing some light on this issue. However, the equipment is still running with overall vibration of approx 3.6 Mils pk-pk on the bearing housings.
I intend to do dry ice-blasting on the rotor to get rid of any imbalance; and also check the bearing clearance; and...
The attach file shows pre and vib data for the inboard bearing (page 1 - 3) and outboard bearing (page 4 - 6). The blower runs at appro 6934 RPM. The rotor was changed out at shutdown, and high vibration was experienced following start up. The 1X filtered orbit plot on the on the outboard...