一、前言O形圈一般安装在机械零件的沟槽里,它的密封面在内侧或外侧和两个相配偶的零件相接触产生一定弹性压缩,去填补运动或静止相对件的间隙,从而起密封作用。它具有结构简单,拆装方便,密封可靠,容易调换磨损件,动摩擦阻力小,不需要进行周期调整,以及在 I. Introduction O-ring is generally installed in the mechanical parts of the groove, the sealing surface in the medial or lateral and two mating parts of a certain contact with the elastic compression, to fill the movement or stationary relative to the gap, which played Sealing effect. The utility model has the advantages of simple structure, convenient disassembly and assembly, reliable sealing, easy replacement of wear parts, small dynamic friction resistance, no need of periodic adjustment,