多軸受軸由系のアライメントと軸受荷重分布の検討

概要

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This paper presents a method to calculate the static bearing loads of multispan rotors by considering the nonlinear characteristics of oil film bearings. The initial alignment to be installed in the rotor is determined by minimizing the difference of the bearing load from the designed value and the stress of rigid couplings. To investigate the effects of the journal center displacement varying with rotating speeds, an actual turbogenerator system with four couplings and eight bearings is numerically investigated under initial and misaligned conditions. It is shown that the amount and direction of bearing loads strongly depend on rotating speeds under the misaligned conditions, but are negligibly small under the initial condition. To clarify the fundamental properties induced by the misalignment of the rotor system, the load direction effects on the journal center, unbalanced response and stability are investigated for a partial arc bearing.
一般社団法人日本機械学会の論文
1991-01-25