不同起点位置对滑动轴承转子系统稳定性影响  

The Effect of Different Starting Positions on Stability of Journal Bearing Rotor System

作　　者：徐万鹏 徐武彬[1] 李冰[1] 王江辉 

机构地区：[1]广西科技大学机械工程学院,广西柳州545006

出　　处：《机械设计与制造》2017年第11期91-94,99,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目-动静态形位误差对滑动轴承转子系统运行的影响及控制(51265004)

摘　　要：基于非线性油膜力模型的滑动轴承转子系统稳定性分析方法,建立非线性油膜力模型,采用有限差分方法求解Reynolds方程,从而求得油膜力,获得轴承轴心轨迹与临界转速,分析由于不同起点位置对滑动轴承转子系统的稳定性影响。结合实际工况,科学选取了11个不同的转子起点位置,通过求得其一系列临界转速,获得此11个不同起点生成的临界稳定性运行参数Op曲线图,通过对其纵向对比、横向对比和综合分析表明:转子在距离稳定运转时的轴心位置越近的起点启动转子,越有利于系统的稳定。The analytical method of stability of journal bearing rotor system based on a model of nonlinear oil film force is used to establish a nonlinear modal.Finite difference method is used to solve Reynolds equation,oil film force.Obtaining axis center trajectory and threshold rotating speed to investigate the effect of different starting positions of rotor on stability of the system. According to actual working conditions, 11 different starting positions of the rotor are selected to obtain a serious of threshold speed and Op curves of the operating parameters of stability from different starting positions.The conclusion got by longitudinal comparison,horizontal comparison and comprehensive indicates ：the closer the starting position away from the stable operating position,the better to the stability of the system

关 键 词：起点位置 非线性 稳定性 滑动轴承 横向对比 纵向对比 

分 类 号：TH16[机械工程—机械制造及自动化] TH113