大きな動荷重が作用するロータ・すべり軸受系の動解析 : 軸受油膜の剛性, 減衰係数の変化

概要

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This paper describes the stiffness and damping coefficient variation in bearing oil films induced by large dynamic loads. A rotor-journal bearing system was analyzed as a coupled problem of momentum equations of the rotor and the Reynolds equations for all the bearings because of the nonlinearity. By using the displacements and the velocities of the rotor center obtained by the analysis, the stiffness and damping coefficients have been numerically calculated as an unsteady state along the locus of the rotor center. The variations per rotor revolution for the coefficients are shown for journal bearings for a rotary compressor. The results clarified that most of the coefficients for all the bearings vary by more than one order of the value, and that oil film nonlinearity is largely concerned in the rotor action.
社団法人日本機械学会の論文
1991-11-25