Methods For Measuring Dynamic Characteristics of Rolling Element Bearings

轴承的动力特性对转子-轴承系统的动力特性有重要的影响。但至今，滚动轴承的动力特性仍缺乏系统的资料，在许多情况下，将滚动轴承简化为无阻尼的定常弹性元件。本文分析了滚动轴承动力特性的主要影响因素，介绍了滚动轴承动力特性的两种测试方法，并以某航空轴承为例作了具体测试，取得了比较一致的结果。本文提出的方法可作为建立滚动轴承动力特性数据库的基本手段。The dynamic characteristics of the bearings have a considerable inFluence on the dynamic characteristics of a rotor bearing system.So Far,there are Few materials concerning the dymamic characteristics of the rolling element bearings.In many cases,a rolling element bearing is simpliFied as an undamped element with constant stiFFness coeFFicient.In this paper,the primary inFluence Factors to the rolling element bearings have been analyzed.Two methods For measuring the dynamic characteristics of the bearings have been introduced.The dynamic characteristics of a ball bearing used in aeroengine have been measured on two test rigs.The results measured From the two rigs are quite coincident with each other.The methods presented in the paper can be used as the basic means For creating the database of dynamic characteristics of the bearings