A Study on the Dynamic Characteristics of High Speed Journal Bearing with Axial Oil Film Rupture and Its Application to Stability Analysis of Floating Bush Bearing

摘要

A modified Reynolds equation derived with centrifugal force acting on lubricating oil film being considered is solved for the hydrodynamic pressure in the concentric oil film of very high Speed journal bearing. The linear rotordynamic coefficients are calculated with the axial oil film rupture being considered. This method yields new linear stability charts of very high speed floating bush journal bearing, which can explain its stability behavior observed in actual machines.