润滑条件下旋转轴唇形密封件磨损分析  

Wear Analysis of Lip Seal of Rotating Shaft under Lubrication

作　　者：张付英[1,2] 马骏 张志祥 夏靖炜 刘元刚 ZHANG Fuying;MA Jun;ZHANG Zhixiang;XIA Jingwei;LIU Yuangang(Cllege of Mechanical Engineering,Tianjin University of Science&Technology,Tianjin 300222,China;Key Laboratory of Integrated Design and On Line Monitoring of Light Industry and Food Engineering Machinery and Equipment in Tianjin,Tianjin 300222,China;Tianjin Science and Technology Development Service Center,Tianjin 300000,China)

机构地区：[1]天津科技大学机械工程学院,天津300222 [2]天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津300222 [3]天津市科技发展服务中心,天津300000

出　　处：《润滑与密封》2023年第6期104-109,共6页Lubrication Engineering

基　　金：科技部创新方法工作专项(2019IM020300)。

摘　　要：将全局网络重构的有限元方法与润滑条件下的数值计算模型相结合,分析油封在润滑条件下的磨损过程中,唇口轮廓、接触压力、最大接触压力、泵吸率和摩擦扭矩等密封性能参数的变化趋势。模拟结果表明:油封磨损可以分为2个阶段,第一阶段为初期磨损阶段,该阶段唇口的磨损速率较大,最大接触压力也呈现较大的下降趋势;第二阶段为稳定磨损阶段,该阶段磨损速率较小,磨损量也较小,最大接触压力变化趋势趋于平缓;唇口轮廓的磨损程度随着磨损时间的增加而逐渐趋于平缓,并且空气侧的磨损程度比油侧更为严重;泵吸率呈现出先下降后上升的变化趋势,说明磨损会导致的唇尖材料损失,会引起油封密封性能的不稳定;摩擦扭矩由于受磨损导致的径向力和润滑油剪切作用相互变化的叠加影响,呈现上升的趋势。Combining the finite element method of global network reconstruction with the numerical calculation model under lubrication,the variation trends of sealing performance parameters such as lip profile,contact pressure,maximum contact pressure,pumping rate and friction torque during the wear process of oil seal under lubrication were analyzed.The simulation results show that the wear of oil seal can be divided into two stages.The first stage is the initial wear stage,in which the wear rate of lip is large,and the maximum contact pressure also shows a large downward trend.The second stage is the stable wear stage,in which the wear rate is small,the wear amount is small,and the variation trend of maximum contact pressure tends to be flat.The wear degree of lip contour tends to be gentle with the increase of wear time,and the wear degree on the air side is more serious than that on the oil side.The pumping rate shows a trend of decreasing first and then increasing,indicating that the wear will lead to the loss of lip tip material and the instability of oil seal sealing performance.The friction torque shows an upward trend due to the combined influence of the radial force caused by wear and the shear action of lubricating oil.

关 键 词：油封 磨损 全局网络重构 润滑条件 密封性能 

分 类 号：TH117[机械工程—机械设计及理论]