空间长寿命球轴承的弹流润滑与密封分析  

Analysis of Elastohydrodynamic Lubrication and Sealing of Long-life Space Ball Bearing

作　　者：王晓旭[1,2] 林冠宇[1] 曹佃生[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《润滑与密封》2015年第7期110-114,124,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(41105014)

摘　　要：针对空间光学遥感仪器扫描机构的高精度、长寿命设计要求,研究空间工况下轴承的润滑与密封方法。建立考虑热效应及润滑剂非牛顿性的角接触球轴承的弹性流体动压润滑(EHL)模型,求出其数值解,分析在空间应用工况下各个参数对轴承润滑性能的影响,并提出润滑改进方法;通过对间隙密封效果的分析,提出一种优化的密封形式。结果表明,应用于空间的角接触球轴承,其热效应、润滑剂的非牛顿性及低速、高载荷会减小润滑油膜厚度;组合式的间隙密封结构密封性能明显优于直通式间隙密封。For the demand of high precision and 1 ing instrument, the design of lubrication and sealing ong life of the scanning mechanism used for space optical remote sens- of the space bearing was studied.Considering thermal effect and non- Newtonianism of greases, the mathematical model for angular contact space ball bearing was established, and the numerical solution was got.The effect on lubrication of each parameter was analyzed, and the optimized method of lubrication was put forward.By analyzing the sealing effect of clearance seal, a better sealing structure was presented. Results show that thermal effect, non-Newtonianism and high load as well as low entrainment velocity can result in the decrease of film thickness. Combined clearance sealing structure can effectively decrease the leakage of greases compared with straight through type clearance sealing structure.

关 键 词：空间光学遥感仪器 弹流润滑 间隙密封 泄漏量 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计] TH117.2[机械工程—机械设计及理论]