摘要
纯水介质黏度低、润滑性差等特性极易导致纯水密封因磨损而失效。在总结纯水介质密封摩擦因数计算模型基础上,基于ABAQUS建立了Y形密封圈往复运动的有限元仿真模型,分析了摩擦因数对密封等效应力、接触应力及接触长度等接触特性的影响。仿真结果表明:由于摩擦因数的影响,Y形密封圈内行程时的最大等效应力位于密封圈的U形口底部,外行程时的最大等效应力位于密封圈的内侧唇缘,同时外行程时的接触长度明显小于内行程,具有更大的接触应力,且外行程的接触长度随摩擦因数增大而变短,接触应力随摩擦因数增大而增加。Y形密封磨损失效主要发生在外行程阶段。
The low viscosity, poor lubricity and other characteristics of pure water medium are very easy to cause the failure of pure water seal due to wear. Based on the summary of the calculation model of pure water medium seal friction coefficient, the finite element simulation model of Y-shaped seal ring reciprocating motion was established based on ABAQUS, and the influence of friction coefficient on the contact characteristics such as seal equivalent stress, contact stress and contact length was analyzed. The simulation results show that due to the influence of the friction coefficient, the maximum equivalent stress of the Y-shaped seal ring during the inner stroke is located at the bottom of the Ushaped mouth of the seal ring, and the maximum equivalent stress during the outer stroke is located at the inner lip of the seal ring. At the same time, the contact length of the outer stroke is significantly smaller than that of the inner stroke, which has greater contact stress. The contact length of the outer stroke becomes shorter with the increase of the friction coefficient, and the contact stress increases with the increase of friction coefficient. The wear failure of Y-shaped seal mainly occurs in the outer stroke stage.
作者
原长锁
Yuan Changsuo(Shendong Coal Group,CHN Energy Group,Ordos 017209,China)
出处
《煤矿机械》
2022年第8期217-220,共4页
Coal Mine Machinery
关键词
Y形密封圈
摩擦因数
接触特性
仿真
Y-shaped sealing ring
friction coefficient
contact characteristic
simulation
