【摘要】 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。更多还原

【Abstract】 A unitized dynamics model for the journal and floating ring of a hydrodynamic floating ring journal bearing was established. The stability criterion of the floating ring journal bearing was obtained using the Routh-Hurwitz method. The stiffnesses and damping coefficients under different operation conditons of the hydrodynamic floating ring journal bearing were calculated with the finite difference method. On this base,the judgment factors of stability criterion were acquired. The results show that floating ring bearing has multi stable regions under small eccentricity of the rotor. At the same time,stable regions change with the eccentricity,radial clearance and lubricant temperature. The results are of referential value in the model integrality and stability analysis of floating ring hybrid journal bearing.更多还原