Influence of the Bearing Type on Vibration Activity of a Double-Span Rotor with a Skew-Symmetric Residual Imbalance

Abstract

The dependence of the vibration activity of the high-temperature part of a turbo-unit containing a high-pressure rotor and a medium–low–pressure rotor under a skew-symmetric residual imbalance of each of the rotors on the type of bearings most often used is studied. Six-pad segmental and elliptical bearings are considered. The presence of unavoidable deflection of a shafting is taken into account in the study. The calculations are performed for the turbine of K-300-23.5 type manufactured by PJSC Power machines at the Leningrad Mechanical plant (LMP). The results obtained are analyzed.