反应堆内置式控制棒滚动轴承磨损寿命的自动预测

Automatic Prediction of Wear Life of Rolling Bearings for Built-inControl Rods in Reactors

提出一种反应堆内置式控制棒滚动轴承磨损寿命自动预测方法,通过研究滚动体间的接触关系计算滚动轴承内部滚道的接触力,根据轴承的磨损形式和内部滚道的接触力计算径向游离缝隙增量,将其作为评估滚动轴承磨损程度的指标计算得到磨损速率。结合轴承的初始状态建立轴承磨损退化函数,利用退化函数失效阈值计算出滚动轴承的最小健康指数,得到滚动轴承在特定磨损形式下的寿命估计,实现轴承磨损寿命的自动预测。实验表明:所提方法可以有效预测轴承的磨损寿命,且准确度较高。

An automatic prediction method for the wear life of rolling bearings of reactor built-in control rods is proposed.The contact force of the internal raceway of the rolling bearings is calculated by studying the contact relationship between the rolling elements.According to the wear form of bearing and the contact force of internal raceway,the radial free gap increment is calculated,which is used as an index for evaluation of the wear degree of rolling bearings to calculate the wear rate.By combining with the initial state of the bearing,the bearing wear degradation function is established,and the failure threshold of the degradation function is used to calculate the minimum health index of rolling bearings,thus the life estimate of rolling bearings under specific wear forms is obtained,and the automatic prediction of bearing wear life is realized.Experiments show that the proposed method can effectively predict the wear life of bearings with high accuracy.