基于正交试验的深海Y形密封圈结构优化

Structure Optimization of Deep-sea Y-ring Seal Based on Orthogonal Test

为提高深海极端环境中Y形圈的密封性能,采用有限元仿真分析Y形圈往复运动中接触应力和剪切应力的特征,通过正交试验分析Y形圈的根部倒角、唇底深度、唇间夹角、唇底圆角半径、唇边长度5个截面参数对其最大接触应力和最大等效应力的影响规律。结果表明:Y形圈根部倒角对密封影响最大,唇底深度、唇间夹角和唇底圆角半径对密封性能的影响次之,三者的影响程度基本相当,唇间夹角对密封影响最小。提出一种优化的Y形圈结构,研究表明,其最大接触应力提高3.99%、最大等效应力降低20.50%;当从海面到下潜到深海5 km的过程中,Y形圈最大接触应力、最大等效应力优于优化前,二者增幅都小于5%。相关研究有效提高了Y形圈在深海环境中的密封性能和可靠性,具有工程应用指导意义。

In order to improve the Y-ring sealing performance of the deep-sea special environment,the reciprocating motion was analyzed through the finite element simulation of contact stress and von Mise stress.The influence on maximum contact stress and maximum von Mise stress of Y-ring five section parameters was analyzed through orthogonal experiment,which included the root of the chamfering,the lip at the bottom,the angle of the lips,the radius of lip corner,the length of the lip.The results show that the chamfering at the root of the Y-ring has the greatest influence on the sealing performance,followed by the depth of the bottom of the lip,the angle between the lips and the radius of the fillet of the bottom of the lip.The influence of the three is basically the same,and the angle between the lips has the least influence on the sealing performance.An optimized structure of Y-ring was obtained.It is found that the maximum contact stress of the Y-ring after optimization is increased by 3.99%,the maximum von Mise stress is reduced by 20.50%.During the process from the sea surface to the deep sea for 5 km,the maximum contact stress and maximum von Mise stress of the Y-ring are better than before optimization,and the both increasing is less than 5%.The research has effectively improved the sealing performance and reliability of Y-ring in deep-sea environment,which has important engineering application value.