Study on Vibration Damping Characteristics of Controllable Squeeze Film Damper

How to control vibration is very important in the field of high speed rotors. Squeeze film dampers are considered an effective method. The existing controllable squeeze film damper is less used for vibration control of the rotor system supported by the sliding bearing. In order to suppress the vibration of the rotor system supported by sliding bearing, a hydraulically-controlled squeeze film damper (HSFD) is studied and analyzed in this paper. A flexible rotor test rig is set up and shaft center orbits and Fourier spectrums of the rotor are measured in order to study vibration damping effect of the sliding bearing with HSFD under different oil supply pressure. A hydraulic servo system is established in this paper to explore the damping effect of controllable squeeze film damper under the control system. The experimental results show that the sliding bearing with HSFD has significant damping effect and can reduce system nonlinearity.