用电容法对活塞环最小油膜厚度的测量

Measurement of the Smallest Oil-Film Thickness on Piston Ring by the Electrical Capacitance Method

本文主要介绍作者在自行设计的PR-C 实验机上,对内燃机活塞环最小油膜厚度进行定量测试的情况。测试结果表明,实测值与理论计算值的相对误差约为10%。此与八十年代初英国Reading 大学、Hamilton 博士的测试结果相比又向前迈进了一步。这证明作者设计的测试系统是可行的,为今后进行活塞环与气缸套的材料、环的几何形状、润滑油添加剂等方面的研究和性能评定以及探讨发动机故障及技术状况监测提供了初步的实验手段和依据。

A quantitative measurement of the smallest oil-film thickness on thepiston ring was made with an experimental rig designed by the authors.Itshows that the difference between experimental results and theoretical onesis 10 percent,which is better than that reported by Dr.Hamilton at theReading University,England.Results have shown that the above experimental rig is feasible,whichmay provide an experimental means for studying and characterizing thematerials of the piston ring and cylinder liner,the geometry shape of thepiston ring,the additive in lubricating oil etc.,and for investigating thefailure diagnosis and working conditions in IC engines.