火箭推进2023，Vol.49Issue(6)：21-30,10.
保持架过梁断裂前后球轴承的动力学行为分析
Dynamic behavior analysis of ball bearings before and after cage lintel fracture
摘要
Abstract
The fracture of the ball bearing cage lintel in rocket turbo-pump occurs from time to time and even affects the normal operation of the turbo-pump system.In order to predict the fracture failure of ball bearing cage timely and effectively,considering the friction and contact effects between the fracture cage,ball bearing and guide ring,the motion differential equation of fracture cage was established and solved by explicit finite element method.The dynamic behavior of a turbo-pump ball bearing before and after the lintel fracture were calculated and compared,and the effects of cage lintel fracture on instantaneous force,slip rate,wear and maximum PV value were studied.The results show that the fracture of the cage lintel significantly increases the force between the cage and the outer ring,and the maximum instantane-ous force increases by 29.81％.The slip rate of cage,the wear of cage guide surface and the maximum PV value increase greatly.There is a large instantaneous impact force between the ball bearings at the fracture position of the cage lintel,and the ball has obvious slippage,with a slip rate of 14.06％.关键词
涡轮泵球轴承/保持架断裂/显式有限元/打滑率/瞬时作用力Key words
turbo-pump ball bearing/cage fracture/explicit finite element/slip rate/instantaneous force分类
航空航天引用本文复制引用
房晓辉,徐自力,王珺,黄金平..保持架过梁断裂前后球轴承的动力学行为分析[J].火箭推进,2023,49(6):21-30,10.基金项目
科工局稳定支持项目(HTKJ2020KL011007) （HTKJ2020KL011007）
基础研究项目(11S2020KT12) （11S2020KT12）
