圆柱、椭圆动压轴承-转子系统轴心轨迹研究  

Research on Track of Shaft Axis of Cylindrical and Elliptical Dynamic Bearing-Rotor System

作　　者：张绍林[1] 陈鸿[1] 李瑞珍[1] 

机构地区：[1]郑州大学机械工程学院,河南郑州450001

出　　处：《机械设计与制造》2016年第8期5-7,共3页Machinery Design & Manufacture

基　　金：河南省教育厅科学技术研究重点项目(编号:13A460675)

摘　　要：轴颈涡动轨迹的发散与收敛取决于油膜动力特性,因此分别以圆柱、椭圆动压轴承支承的单质量对称转子系统为对象,研究界限状态下的轴心轨迹。通过建立系统的动力学方程和轴心的运动轨迹方程,借助动压轴承特性参数数据库,以图形正规化的方式得到了不同偏心率、长径比和椭圆度下的界限轴心轨迹图。计算和图形结果表明各工况下随着偏心率增大,圆柱轴承和椭圆轴承支承的转子系统稳定性均提高,且椭圆轴承转子的系统稳定性优于圆柱轴承。研究为轴心轨迹计算和分析方面提供了参考意义。Divergence and convergence of shaft journal whirl depends on oil-film dynamics characteristics, therefore using symmetrical rotor system with single mass supported by cylindrical and elliptical bearings to research the track of shaft axis in the critical state. The dynamic model and shaft axis movement equations are set up. Through database, the normalized charts of track of the shaft axis in the critical state are obtained under different eccentricity, length-to-diameter ratio and elasticity. The numerical results and charts show with the increase of eccentricity, rotor system stability improves simultaneously supported by cylindrical and elliptical bearings. Meanwhile, the elliptical bearing-rotor system stability is better than cylindrical bearing-rotor system, It has a reference value in the calculation and analysis of the track of shaft axis.

关 键 词：轴心轨迹 界限状态 圆柱轴承 椭圆轴承 

分 类 号：TH133.3[机械工程—机械制造及自动化] TH113.1