Real‐time measurement of the lubrication state is one of the critical problems in studying the lubrication state and its transformation characteristics. Based on the experimental results, shrinkage resistance principle and Greenwood's contact theory, a mathematical model for cylinder liner‐piston ring that can be used to measure the resistance of film thickness ratio is established. On this foundation, the correspondence between the film thickness ratio and the contact resistance for cylinder liner‐piston ring was presented and the technical possibility to characterise the real‐time lubrication state was provided. An experimental study for determining the lubrication state of cylinder liner‐piston ring based on resistance measurement method was conducted on a reciprocating friction and wear tester to verify the applicability of resistance measurement method in cylinder liner‐piston ring friction pair. Results show that the contact resistance method is reliable and practicable to determine the lubrication state of cylinder liner‐piston ring friction pair.

中文翻译：

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基于阻力测量法的缸套-活塞环润滑状态研究

润滑状态的实时测量是研究润滑状态及其转变特性的关键问题之一。基于实验结果，抗收缩性原理和格林伍德的接触理论，建立了可用于测量膜厚比阻力的缸套-活塞环数学模型。在此基础上，提出了膜厚比与气缸套-活塞环接触电阻之间的对应关系，并提供了表征实时润滑状态的技术可能性。在往复式摩擦磨损试验机上进行了基于阻力测量方法确定气缸套-活塞环润滑状态的实验研究，验证了阻力测量方法在气缸套-活塞环摩擦副中的适用性。结果表明，接触电阻法是确定缸套-活塞环摩擦副润滑状态的可靠方法。