Research of Dynamics of the Rotor with Three-film Bearings

Abstract

Rotating floating rings in the rotor bearings are widely used for decrease of rotor vibrations in small rotor machines. Such bearings are named two-film, because have two lubricant films.Dynamics of the rotor with floating ring bearings is investigated in details in [1–3]. The charging system also use non-rotating floating rings in turbochargers of internal combustion engines [4].In some combinations of design and condition parameters of the rotor bearing system, the dimension of rotor and rings motion trajectory can essentially increase, though it is still limited [1–3]. To decrease journal and ring oscillation amplitudes and loadings affecting the bearing, the design with three lubricant films can be used. It is achieved through installation of the floating ring package into a rotor machine case. Floating ring bearing package consists of one non-rotating floating ring (NF ring) and two rotating floating rings (RF ring).