ABSTRACT The surface roughness of friction pairs plays a significant role in the formation of hydrodynamic fluid film between rod-seal interface. To investigate the influence of rod surface roughness on lubrication characteristics of hydraulic reciprocating seal, the friction force and the net leakage of seal under quasi-constant speed conditions and variable speed conditions are compared and analyzed, by using a self-designed experimental device. The results show that the rod surface roughness has an important influence on seal behavior and cannot be ignored. The rougher the rod surface is, the greater the friction force and the net leakage are, and the seal is more prone to meet with the rolling torsion or fatigue failures under the conditions of frequent start-up and shut-down.

中文翻译：

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活塞杆表面粗糙度对液压O形密封圈润滑特性影响的实验研究

摘要 摩擦副的表面粗糙度在杆密封界面之间流体动力流体膜的形成中起着重要作用。为研究活塞杆表面粗糙度对液压往复密封润滑特性的影响，采用自行设计的实验装置，对准等速工况和变速工况下密封件的摩擦力和净泄漏量进行对比分析。结果表明，杆表面粗糙度对密封性能有重要影响，不容忽视。杆面越粗糙，摩擦力和净泄漏越大，密封件在频繁启停的情况下更容易出现滚动扭转或疲劳失效。