The application of ring dynamic vibration absorber in vibration control of rotor was studied by experiment. A kind of separable ring dynamic vibration absorber placed on bearing was designed based on single disc rotor model and vibration characteristics. Vibration absorber can be installed on optional position between two bearings without changing any support structure and affecting dynamic performance of rotor. The rotor experiment rig of vibration reduction with vibration absorber was built to measure the vibration with critical speed of rotor. The results show that vibration absorber can decrease vibration greatly

and the vibration amplitude is dropped by 70% at critical speed of rotor. The frequency range of vibration reduction can be broadened and the natural frequency of vibration absorber can be adjusted accurately by increasing the mass of vibration absorber. The relationship between vibration reduction effect and installation position of vibration absorber was studied by experiment. The results show that position of large amplitude is better than other area. The vibration reduction effect with different numbers of vibration absorbers was compared under rotor imbalance vibration

and the result indicates that the effect of two vibration absorbers is better than that of one.