【摘要】 船舶柴油机作为船舶的核心动力来源，其中的缸套-活塞环作为重要摩擦副之一，保障其可靠性，而采用优质润滑添加剂是针对缸套-活塞环磨损控制的有效方法之一。制备了不同类型的石墨烯/凹凸棒石（G-ATP）复合润滑添加剂，在不同试验工况下进行了缸套-活塞环的摩擦学试验。结果表明：制备比例为4∶1的G-ATP复合添加剂材料表现出最佳的减摩抗磨效果，在高速重载工况下平均摩擦系数降低了25.40%，磨损质量降低了70.91%，平均磨痕深度降低了71.78%。同时缸套试样表面粗糙度也得到改善，表面均方根偏差Sq值降低了61.60%，谷区液体滞留指数Svi值提升了44.57%。G-ATP复合添加剂材料的协同润滑能够显著提升缸套-活塞环的摩擦学性能，凹凸棒石作为石墨烯的负载单元能增强石墨烯的层间滑动，减少摩擦副之间的接触面积并形成优质的摩擦保护膜，使摩擦副接触形式由金属-金属接触转为氧化膜-氧化膜，降低摩擦系数，同时剥落的凹凸棒石能沉积缸套试样磨损表面产生填充自修复作用并抛光表面，减少磨损。该研究结果为利用G-ATP复合添加剂抑制船舶柴油机缸套-活塞环磨损提供了一种方法。更多还原

【Abstract】 Marine diesel engine is the core power source of the ship, in which the cylinder liner-piston ring is one of the important friction pairs to ensure its reliability, and the use of high-quality lubricating additives is one of the effective ways to control the wear of the cylinder liner and piston ring. prepared different types of graphene/attapulgite(G-ATP) composite lubricating additives are prepared, and tribological tests of cylinder liner-piston ring are carried out under different test conditions. The results show that the preparation ratio of 4 ∶ 1 G-ATP composite additive material shows the best anti-friction and anti-wear effect, and the average friction coefficient is reduced by 25.40%, the wear quality is reduced by 70.91% and the average wear depth is reduced by 71.78% under high speed and heavy load conditions. At the same time, the surface roughness of cylinder liner samples is also improved, the surface root-mean-square deviation Sq decreased by 61.60%, and the valley liquid retention index Svi increased by 44.57%. The collaborative lubrication of G-ATP composite additive material can significantly improve the tribological performance of cylinder liner-piston ring. Attapulgite, as the load unit of graphene, can enhance the interlayer slip of graphene, reduce the contact area between friction pairs and form a high-quality friction protective film, so that the contact form of friction pairs changes from metalmetal contact to oxide film-oxide film, reducing the friction coefficient. At the same time, the spalling attapulgite can deposit the worn surface of the cylinder liner sample to produce filling self-healing effect and polishing the surface to reduce wear. The research results provide a method for inhibiting the wear of cylinder liner-piston ring of Marine diesel engines by using G-ATP composite additive.更多还原