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O形圈是断面呈圆形的密封件,一般安装在机械零件的沟槽里。当两个相配偶的零件接触时,产生一定的弹性压缩而起密封作用。同其它密封件相比,具有结构简单、拆装方便、密封可靠、动摩擦阻力小、不需进行同期调整以及在固定和运动状态下均可使用等特点,因而广泛用于汽车、拖拉机、工程机械、机床以及各种液压元件的密封中。据统计,我国机械产品所需的密封件中,O形圈的用量占50％以
O-ring is a cross-section of the circular seal, usually installed in the mechanical parts of the trench. When the two mating parts contact, produce a certain degree of elastic compression and play a sealing role. Compared with other seals, it has the advantages of simple structure, convenient disassembly and assembly, reliable sealing, small dynamic friction resistance, no need of adjusting synchronously and being able to be used under fixed and sporting conditions. Therefore, it is widely used in automobiles, tractors, construction machinery , Machine tools and a variety of hydraulic components in the seal. According to statistics, China’s mechanical products required seals, the amount of O-ring accounted for 50%