X形丁腈橡胶密封件的有限元分析

为研究X形丁腈橡胶密封件在往复轴的静压工作状态和往复工作状态下都能可靠地密封，利用大变形非线性有限元方法对此密封机构的各种工作状态进行了分析，并讨论了不同状态下，各应力状态的分布规律和各应力随不同工作压力的变化规律。结果表明：无论何种工作状态，其高应力区均分布在密封圈非压力侧凹圆处或间隙挤出处，且上行时的接触应力大于下行时的接触应力。

Finite Element Analysis for Nitrile Rubber X-Ring Seal Structure

To explore the sealing performances of nitrile rubber sealing X-ringwhen under static pressure and in working process of the reciprocating shaft, in this paper finite element method is adopted in simulating the procedures. The stress distribution in different conditions and different working pressure is discussed. The analysis shows that in whatever conditions the distribution of high stress are either in the concavity of the sealing X-ring in the side without pressure or in the extrusion of the clearance, and the contact stress when moving up is bigger than that of when moving down.