滚子轴承特定结构耦合EHL控制转子非线性响应的数值研究  

Numerical Study of Nonlinear Response for Rotor Controlled by Coupled EHL Roller Bearing with Particular Structure

作　　者：袁幸[1] 朱永生[1] 洪军[2] 张优云[1] 翁小东[1] 

机构地区：[1]西安交通大学润滑理论与轴承研究所,陕西西安710049 [2]西安交通大学机械制造系统工程国家重点实验室,陕西西安710049

出　　处：《润滑与密封》2010年第11期18-22,共5页Lubrication Engineering

基　　金：国家科技重大专项资助项目(2009ZX4001-022);国家自然科学基金资助项目(50935006)

摘　　要：应用理论分析和数值计算,针对实际精密转子系统服役性能要求,研究弹流润滑(EHL)下滚子轴承特定结构对转子非线性动态行为的控制机制,讨论一些主要参数滚子振动状态的影响。结果表明:支承端峰峰(P-P)值随滚子个数、滚道曲率系数、润滑剂黏度变化显著,适当选取这些参数可跃过共振区并使运动幅值精度提高;振动谱以固有振动、通过振动及其谐波组合为主频,EHL起到阻尼器的作用,可以整体削减系统振幅。Through theoretical analysis and numerical calculation, the nonlinear dynamic mechanism for the rotor controlled by elastohydrodynamic lubrication（EHL） roller bearings with particular structure was studied for service performance requirements of the actual precision rotor system. Some important parameters affected the vibration state of the rotor were discussed. The results show that peak-peak（P-P） values of bearing sides change with the number of rollers, raceway curvature coefficient, lubricant viscosity significantly, the proper selection of the parameters can be sluggish the resonant re- gion and to improve the precision of movement amplitude. Vibration spectra is composed of inherent vibration, VC vibration and its harmonics, EHL plays the role of damper system,which can reduces the overall amplitude.

关 键 词：精密转子系统 滚子轴承 弹流润滑(EHL) 特定结构 

分 类 号：TH117[机械工程—机械设计及理论]