Calculated Estimates for the Thermal State and the Precession Amplitude of the Rotor in the Turbocharger Radial Bearing

摘要

A modern turbocharger rotor operates under conditions of high speeds and temperatures. Usually the rotor is based on multilayer plain bearings. The thermal state of each bearing has a great importance. The rotor vibration amplitude determines its performance. Choosing bearings clearances, which provide a stable movement of the rotor, is a very urgent task. The article presents the method of the flexible asymmetric rotor dynamics calculating and the results of the radial plain bearing computational parametric studies. The plan of the experiment based on the orthogonal central composite plan was drawn up. The regression equations for the function of the rotor amplitude and bearing temperature were obtained. The clearances (external and internal), rotor speed, pressure and lubricant temperature were used as variable parameters. The calculation results were compared with experimental results. As a result of the research, the recommendations on the choice of the bearing clearances and their ratio were presented.