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O形圈广泛用作往复运动附件的密封,这类部件的工作能力在很大程度上取决于密封件的初始摩擦力和运动摩擦,取决于橡胶的压缩程度、弹性模数、接触材料的性能和表面粗糙度等。初始摩擦力取决于橡胶圈同金属表面接触时间的长短,可能会超过运动摩擦力2倍多。在真空及空气压力同时作用的条件下长期接触时,测定橡胶圈的摩擦力在技术上是很复杂的。真空的存在将大大改变附着作用的强度、接触表面状况、润滑性能以及热交换条件等
O-rings are widely used as seals for reciprocating attachments. The ability of such components to work depends largely on the initial friction and kinematic friction of the seal, depending on the degree of compression of the rubber, the elastic modulus, the properties of the contact material And surface roughness. The initial friction depends on how long the rubber ring contacts the metal surface and may exceed two times the amount of kinematic friction. In the vacuum and air pressure at the same time under the conditions of long-term contact, the determination of the friction of the rubber ring is technically very complicated. The presence of a vacuum will greatly alter the strength of the attachment, the condition of the contact surface, the lubricity and heat exchange conditions