典型汽轮发电机可倾瓦径向轴承冲击刚度研究

A study on the shock stiffness of a titling-pad bearing in a turbo generator

采用仿真结合试验的方法开展汽轮发电机径向可倾瓦滑动轴承的冲击刚度参数研究。基于不同的轴承冲击试验工况,采用黑箱法通过数值模拟识别了轴承冲击刚度参数。研究表明,径向可倾瓦滑动轴承的冲击刚度可采用等值的非交叉刚度模拟,且轴承刚度冲动比与冲击速度之间存在线性比例关系。该方法可为同类型径向可倾瓦滑动轴承的冲击刚度模拟提供参考。

The impact performance of a tilting-pad journal bearing in a turbo generator was studied by means of simulation and test.The shock stiffness of the bearing was considered as the only unknown quantity in a black box and it was identified through comparing the simulation result and the test result in various shock test cases.It shows that the shock characteristics of the tilting-pad journal bearing can be simplified as an equivalent non-intersecting stiffness parameter,and there is a simple formula relation between the shock stiffness and the shock velocity which is loaded to the bearing and represents the shock energy.