Oil seal wear is the main cause of early failure in airframe rod end-bearing. In this study, the thermal-stress-wear coupled finite element model of oil seal, the coupled dynamic differential equations of airframe rod end-bearing and oil seal were established. The influences of bearing dynamic characteristics and oil seal parameters on the oil seal wear characteristics were studied. The results are as follows: the evolution of the oil seal wear, the effects of the bearing dynamic characteristics and the oil seal parameters on the oil seal wear are developed. The oil seal parameters are optimized and the seal test shows that the average grease retention rate of the optimized oil seal increased by 17.3%.

油封磨损是机身杆端轴承早期失效的主要原因。本研究建立了油封的热-应力-磨损耦合有限元模型，建立了机身杆端轴承与油封的耦合动力微分方程。研究了轴承动态特性和油封参数对油封磨损特性的影响。结果如下：发展了油封磨损的演变、轴承动态特性和油封参数对油封磨损的影响。对油封参数进行了优化，密封试验表明，优化后的油封平均保脂率提高了17.3%。