轮毂轴承单元密封结构优化设计及试验验证  

Optimal Design and Experimental Verification of Sealing Structure of Hub Bearing Units

作　　者：赵圣卿[1,2] 王福荣 陈兆楠 刘朝艳 李冠杰 ZHAO Shengqing;WANG Furong;CHEN Zhaonan;LIU Zhaoyan;LI Guanjie(Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology,Luoyang 471039,China;GSP Nanjing Co.,Ltd.,Nanjing 211300,China;Henan University of Science and Technology,Luoyang 471003,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南省高性能轴承技术重点实验室,河南洛阳471039 [3]南京冠盛汽配有限公司,南京211300 [4]河南科技大学,河南洛阳471003

出　　处：《轴承》2025年第2期39-45,共7页Bearing

摘　　要：针对轮毂轴承单元密封结构产生的摩擦力矩占比过大的问题,提出了将密封材料由氟橡胶改进为丁腈橡胶,密封结构减少一个接触唇的改进措施,并通过优化得到最优密封中间唇参数为唇倾斜角65°、唇厚0.6 mm、唇长3.8 mm、过盈量0.35 mm。将密封改进后的轮毂轴承单元进行了密封圈应力、漏脂试验、泥浆试验的仿真分析并通过试验进行验证,结果表明,优化后的轴承应力均满足材料许用应力要求,未出现漏脂现象,油脂含水量增加小于3%,启动、动态摩擦力矩分别降低了24.3%,22.1%,证明了优化后密封结构的可靠性。In response to the problem of excessive friction torque generated by sealing structure of hub bearing units,it is proposed to improve the sealing material from fluororubber to nitrile rubber and reduce one contact lip in sealing structure.Through optimization,the optimal sealing intermediate lip parameters are obtained as lip inclination angle of 65°,lip thickness of 0.6 mm,lip length of 3.8 mm and interference fit of 0.35 mm.The units with improved seals are subjected to simulation analysis of sealing ring stress,grease leakage test and mud test,and verified by experiments.The results show that the bearing stress after optimization meets the allowable stress requirements of materials,and no grease leakage occurs.The moisture content in grease increases by less than 3%,and the starting and dynamic friction torque decreases by 24.3%and 22.1%,respectively,proving the reliability of optimized sealing structure.

关 键 词：滚动轴承 轮毂轴承单元 密封 优化设计 摩擦力矩 有限元分析 试验 

分 类 号：TH133.331[机械工程—机械制造及自动化] U463.3[机械工程—车辆工程]