径向动压浮环轴承-转子系统多稳定区域研究

以径向动压浮环轴承为研究对象，针对轴颈、浮环建立统一的动力学方程，用Routh-Hurwitz准则给出单质量刚性对称浮环轴承-转子系统稳定性判据。用有限差分计算某高速径向动压浮环轴承刚度、阻尼系数，获得不同工况下系统稳定性曲线。结果表明，小偏心率下系统升速过程中呈现多个稳定区域，且随偏心率、内外膜半径间隙变化而变化。油膜温度变化亦会影响系统稳定性。为高速浮环轴承稳定性整体建模、分析提供借鉴。

Study on multi stable regions of journal hydrodynamic floating ring bearing-rotor system

The unitized dynamics model of journal and floating ring for a journal hydrodynamic floating ring bearing was established. The stability criterion of the journal floating ring bearing was obtained using Routh-Hurwitz method. The stiffness and damping coefficients under different operation conditons for this journal hydrodynamic floating ring bearing were calculated with finite difference method. On this base the judgment factors of stability criterion was acquired. The results show that floating ring bearing has multi stable regions under small eccentricity. At the same time, stable regions change with the eccentricity, radial clearance and lubricant temperature. The research fruits have great value in the model integrality and stability analyse of journal floating hybrid bearing.