The performances of diesel cylinder liner-piston ring (CLPR) that works under harsh conditions are very important and affect the service life, reliability and economy of engines. This study aimed to gain insights into the anti-friction and self-repairing properties of lubricating oil with different silicate-based additives for marine diesel CLPR, and expect to find the types and concentrations of additives that are most appropriate for CLPR. Three kinds of silicates, including ultrafine serpentine, attapulgite and kaolin powders, were prepared and modified, and added to the lubricants with different concentrations. The tribological behaviours and worn surface features of the friction pairs were investigated after friction tests. Compared with original oil, it is found that all additives process anti-friction and self-repairing properties at appropriate concentration, and the ultrafine attapulgite powders additive presents the best performance. These findings will aid in understanding the anti-friction and self-repairing abilities of silicate-based additives to diesel CLPR, as well as its potential application to solve the wear failures of CLPR online.

中文翻译：

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超细蛇纹石、凹凸棒石和高岭土在缸套-活塞环摩擦系统中的减摩和自修复能力

在恶劣条件下工作的柴油缸套活塞环（CLPR）的性能非常重要，影响着发动机的使用寿命、可靠性和经济性。本研究旨在深入了解不同硅酸盐基添加剂用于船用柴油 CLPR 的润滑油的减摩和自修复性能，并期望找到最适合 CLPR 的添加剂类型和浓度。制备并改性了超细蛇纹石粉、凹凸棒石粉和高岭土粉三种硅酸盐，并以不同浓度添加到润滑油中。在摩擦试验后研究了摩擦副的摩擦学行为和磨损表面特征。与原油相比，研究发现，所有添加剂在适当浓度下均具有减摩和自修复性能，其中超细凹凸棒粉添加剂表现出最佳性能。这些发现将有助于了解硅酸盐添加剂对柴油 CLPR 的减摩和自修复能力，以及其在在线解决 CLPR 磨损故障方面的潜在应用。