Abstract:  Rotor vibration is one of the important factors that restrict the safe and reliable operation of centrifugal air compressors. In this paper, the causes of the high vibration of low speed rotors in centrifugal air compressors are analyzed and some countermeasures for the high vibration of low speed rotors are put forward. By taking maintenance measures such as replacing the inlet filter chamber and cleaning the primary and secondary impeller and the spiral case in centrifugal air compressors, the vibration of low speed rotors in centrifugal air compressors has been reduced, and good results have been achieved after the maintenance.

Key words:  , centrifugal air compressor, low speed rotor, vibration, countermeasure