高速陶瓷滚动轴承等效刚度分析与试验  

Theoretical Analysis and Experiment of the High Speed Ceramic Rolling Bearing Equivalent Stiffness

作　　者：唐云冰[1] 罗贵火[1] 章璟璇[1] 高德平[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《航空动力学报》2005年第2期240-244,共5页Journal of Aerospace Power

基　　金：国防基础科研基金资助项目(01B52008)

摘　　要：高速旋转机械,尤其是微小型发动机广泛采用陶瓷滚动轴承。轴承支承刚度对高速转子——支承系统的动力特性有重要的影响。滑动轴承已有比较系统的动力特性数据库可供参考使用;滚动轴承一般按经验公式估算其刚度特性或简化为定常的弹性元件,但误差较大。本文分析了影响滚动轴承等效刚度的主要因素,提出了滚动轴承等效刚度的计算方法,并设计了试验装置,对陶瓷轴承的等效刚度进行测试。理论分析和试验取得了比较一致的结果。Ceramic bearings are widely used in the high speed machine, especially in the micro or small turbine engines. The bearing stiffness has a considerable influence on the dynamic characteristics of a rotor-bearing system. There were some databases of slide bearing dynamic characteristics. Rolling bearing stiffness is usually estimated empirically and it is simplified as a constant stiffness element. This method often causes large error. The primary factors that influence the rolling bearing equivalent stiffness were analyzed and a method for the calculation of rolling bearing equivalent stiffness was proposed. A test rig was designed for measuring the equivalent stiffness of ceramic bearings. The theoretical and experimental results agree well.

关 键 词：航空、航天推进系统 转子动力学 等效刚度 动力特性 陶瓷轴承 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]