考虑磨损的接触式端面密封模型及试验  

Contact End Face Seals Considering Wear:Modelling and Experiments

作　　者：惠玉祥 刘莹[1] 王悦昶 黄伟峰[1] 李永健[1] HUI Yuxiang;LIU Ying;WANG Yuechang;HUANG Weifeng;LI Yongjian(State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084

出　　处：《摩擦学学报》2021年第3期316-324,共9页Tribology

基　　金：国家自然科学基金项目(51975315)资助。

摘　　要：针对油润滑窄端面接触式端面密封,建立了考虑端面稳定磨损的密封性能分析模型.基于流体承载和固体接触承载共同平衡闭合力的传统思路,引入Archard磨损模型,创新性地提出沿窄端面径向方向磨损均匀假设,从而使用半解析方法得到近似固体接触力、流体承载力及介质膜厚分布.在此基础上耦合密封环组件力和热变形,最终得到密封泄漏量、端面温度等性能参数.相应台架试验结果也较好地验证了模型的正确性.所建模型对于窄端面接触式端面密封的性能分析和密封优化设计具有指导意义.A theoretical model for narrow end face contact seals lubricated by oil was proposed in this work,in which the wear of end face during steady wear state was considered.The basic concept of the present model was the load balance between close force and open force,which was the composite of solid contact force and fluid support force at the sealing interface.In addition,the Archard wear model was utilized,resulting in an novel assumption which was the uniformity of wear along the radial direction of the end face seals.Then,the solid contact force,fluid load capacity,and the fluid film thickness distribution were estimated approximately by semi-analytical formulae.Next the mechanical and thermal deformation of seal components were involved to form the classic thermal elastic hydrodynamic lubrication model.Finally,the performance parameters of end face seals,e.g.leakage of seals and end face temperature,were predicted.Corresponding experiments were conducted and compared with the prediction values of the present model.The results illustrate the validity of this novel model,which could be a guideline for the performance analysis and structure optimization of narrow end face contact seals.

关 键 词：接触式密封 端面磨损 性能模型 混合润滑 试验验证 

分 类 号：TH137[机械工程—机械制造及自动化]