方形同轴组合密封的结构及运行参数优化研究

摘要

利用 ANSYS 分析了方形同轴组合密封的结构及运行参数对其动静态密封性能的影响．结果表明：主密封面的最大静态接触压力随着滑环厚度的增加而显著减小，随滑环两侧倒角或O形圈压缩率的增加而增大；活塞杆的往复运动速度和滑环的摩擦因数对主密封面的最大动态接触压力和密封面间的摩擦力影响不明显．应用响应曲面法，以得到密封面最大接触压力和最小摩擦力作为优化目标，对该组合密封的结构参数进行优化设计，得到了方形同轴组合密封的最佳参数组合方案，即当方形同轴密封的滑环厚度为2.03,mm、顶倒角角度为33.26°、O 形圈压缩率为16.70%,时密封性能最优．%ANSYS was used to analyze the impact of the rectangular coaxially combined seal’s structure and operating pa-rameters on the static and dynamic sealing performance.The results showed that the maximum static contact pressure of the primary sealing surface decreased significantly with the increase of the sliding ring’s thickness,but increased with the grow-ing of both sides of the sliding ring’s chamfering and O-ring compression rate.The influence of the reciprocating motion speed of the piston rod and the friction coefficient of the sliding ring on the maximum dynamic contact stress of the primary sealing surfaces and the friction between the sealing surfaces was not obvious.In order to realize the optimization target of getting maximum contact pressure and minimum friction of the sealing surface,the structural parameters of the combined seal were optimized by applying the response surface method,and the best structural parameters were obtained.The rectan-gular coaxially combined sealing property was the best when the sliding ring’s thickness was 2.03,mm,the top chamfering angle 33.26°,and the O-ring compression rate 16.70%,.