考虑动态时变载荷的滚动轴承可靠性寿命评估方法OA北大核心CSTPCD

Load is a factor that cannot be disregarded during the running of rolling bearing,and loads with distinct characteristics will exert varying impacts on the reliability of bearing.In response to the stochastic time-varying nature of equivalent dynamic loads borne by rolling bearings,a reliability life evaluation method of rolling bearing considering dynamic time-varying loads was proposed to solve the problem of low evaluation accuracy caused by ignoring the time-varying bearing load in traditional methods.Based on the grey prediction model,the analysis model of the stochastic time-varying process of the bearing equivalent dynamic load was constructed,and the small sample load data was forecasted and supplemented.On this basis,an reliability life evaluation method of rolling bearing based on dynamic stress-strength interference model was proposed,and the working interval of dynamic load was obtained,so as to obtain the bearing reliability life interval.The reliability life test of cylindrical roller bearing NU206E was carried out to verify the proposed method.The results showed that,compared with the traditional method,the bearing life evaluation value obtained by the proposed method was close to the test values with higher accuracy and shorter evaluation time,and the life interval covering the most test values could be obtained.The method combining gray prediction model and dynamic stress-strength interference model has good engineering application value,and provides a new idea for reliability evaluation of rolling bearing under variable load conditions.