You said that your compressor has "suddenly" increased vibration readings with a dominant peak at 2X. I suspect your motor of softing foot. You have to check the tightness of feet as well as alignment before replacing the bearing.
Regards,
Jason
Hi, Electricpete,
Your problem looks like a critical speed or a frame resonance problem. You could compare the accelerometer readings from the fram top of your motor with the housing readings. In general, if the horizontal vibration at the frame top has not a obviuosly increasing than the...
According to my experience, the gyroscopic effects would have significant affection when the rotor runs in high speed, such as 10k rpm or above. And the effect is also relative to the mass distribution of rotor. But generally speaking, the 1st mode of flexible rotor would not have obviously...