Yx形液压密封圈的有限元分析及结构优化

应用超弹性理论和非线性理论,采用有限元方法对Yx形液压密封圈的性能进行模拟,分析其失效的位置和模式,研究参数对密封性能的影响,提出结构优化模型。结果表明:Yx形密封圈工作时最大应力出现在上下唇交汇处,变形最大区域发生在Yx形开口靠近内唇处,其根部有较大的接触压力,并且可能发生咬伤现象;介质压力增大时,剪应力和最大接触压力明显增加;最大变形随初始压缩率的增加而线性增大,最大剪应力在压缩率为20%时达到最大;槽口圆角半径对Yx形密封圈密封性能的影响很小;摩擦因数增大时,最大剪切应力明显增加,但最大变形和最大接触压力都有减小的趋势。结构尺寸优化后,密封性能增强,接触宽度明显减小,密封圈根部摩擦和磨损得到改善,可以提高密封圈的使用寿命。

Finite Element Analysis and Optimization Design of Yx Shape Hydraulic Sealing Ring

Based on super elasticity theory and nonlinear theory,the performances of Yx shape hydraulic sealing ring,such as the sealing ring deformation,the contact pressure and stress were simulated by finite element method,the failure position and patterns were analyzed,the effect of parameters on sealing performance were studied,the structure optimization model was put forward.Results show that the biggest stress appears in the intersection of lips,the largest deformation occurs in Yx shape openings near inner lip...