径向浮环动静压轴承稳定性研究  

Stability of a journal floating ring hybrid bearing

作　　者：郭红[1] 张直明[2] 岑少起[1] 陈昌婷[1] 

机构地区：[1]郑州大学机械工程学院,郑州450001 [2]上海大学机电工程与自动化学院,上海200072

出　　处：《振动与冲击》2012年第17期17-21,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51075373)

摘　　要：以径向浮环动静压轴承为研究对象,针对轴颈和浮环建立了统一的动力学方程,用Routh-Hurwitz准则推导了径向浮环轴承的稳定性判据。用有限元法计算了某结构高速径向浮环动静压轴承的刚度系数和阻尼系数,在此基础上得到了不同偏心率下的失稳转速。由计算结果可以看出,浮环轴承具有极佳的稳定性,且随着偏心率的增加,失稳转速迅速提高。文章在高速浮环轴承稳定性整体建模和分析方面有较大的参考意义。The unitized dynamic model of journal and floating ring for a journal floating ring hydrostatic/ hydrodynamic bearing was established. The stability criterion of the journal floating ring bearing was deduced using Routh- Hurwitz method. The stiffness and damping coefficients under different rotating speeds and eccentricities for a high speed floating ring bearing were calculated with finite element method. On this base, the variation of threshold speed vers us eccentricity was acquired. The results showed that a floating ring bearing has excellent stability and the threshold speed grows quickly with increase in eccentricity; the study results provide a reference for model integrity and stability analysis of a journal floating ring hybrid bearing.

关 键 词：径向浮环轴承 刚度 阻尼 失稳转速 

分 类 号：TH133.3[机械工程—机械制造及自动化]