Analysis of Rotor Dynamics Characteristics of Jeffcott Rotor-floating Ring Bearing System including heat transfer
Abstract: With the increasing application of turbochargers on internal combustion engines, there are more and more examples of vibration faults in turbochargers. The dynamics of the bearing-rotor system of engine turbocharger systems have received extensive attention. The bearing-rotor system dynamics is a discipline that couples bearing fluid lubrication research and rotor dynamics. The lubrication characteristics of the bearing and the dynamic characteristics of the rotor must be studied at the same time. In this paper, the lubrication model of floating ring bearing of turbocharger was established, and the viscosity lubrication condition considering heat transfer effect was obtained. Based on the Capone cylindrical bearing oil film force model, the nonlinear oil film force equation of the floating ring bearing was deduced. Further the dynamic model of the Jeffcott rotor-floating ring bearing system was established.