接触式端面密封由于其密封性能较佳，因而得到广泛应用；但因其工作寿命短，使其使用不尽人意。本文通过对端面密封的动力分析，探讨了端面密封的端面接触式状态与非接触式状态的相互转化，论证了这种转化是完全可以实现的，这对延长端面密封系统的工作寿命无疑是有益的。 Contact seal because of its better sealing performance, which has been widely used; but because of its short working life, so that its use is not satisfactory. In this paper, through the dynamic analysis of the end seal, the mutual transformation between the contact state and the non-contact state of the end seal is discussed, which is proved to be completely achievable, which is undoubtedly beneficial to extend the working life of the end seal system of.