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目前内燃机活塞环-缸套摩擦副润滑分析中,活塞环与缸套之间的润滑状态一般假设为充分润滑或固定状况的贫油润滑,不是通过对实际润滑油膜形成情况的分析确定.本文中以一多缸四行程内燃机为研究对象,基于润滑油流量以及控制体体积变化方程,建立活塞环-缸套间润滑油的流动模型,进行了不同进口处润滑油膜供给量对活塞环-缸套摩擦副润滑特性的影响分析.结果表明:活塞环进口处的润滑条件对活塞环-缸套摩擦副的润滑性能有显著影响;进口处润滑油供给量增加,活塞环-缸套摩擦副的最小油膜厚度增加,最大油膜压力、微凸体作用力、摩擦力和功耗均相应减小;进口处供给油膜厚度较小的情况下,增加油膜供给厚度可以明显改善活塞环-缸套摩擦副的润滑性能.
At present, in the analysis of internal combustion engine piston ring-cylinder liner friction pair lubrication, the lubrication state between piston ring and cylinder liner is generally assumed to be lean lubrication under full lubrication or fixed condition, not through the analysis of the actual formation of lubricant film. Taking a multi-cylinder four-stroke internal combustion engine as the research object, the flow model of piston-cylinder inter-lube oil was established based on the flow rate of lubricating oil and the volume change equation of the control body. The friction of piston ring- The results show that the lubrication conditions at the inlet of the piston ring have a significant effect on the lubrication performance of piston ring and cylinder liner friction pair. The supply of lubricating oil at the inlet increases and the minimum film thickness of the piston ring and cylinder liner friction pairs As the thickness increases, the maximum oil film pressure, asperity force, friction force and power consumption decrease correspondingly. When the inlet oil film thickness is small, increasing the oil film thickness can obviously improve the lubrication of piston ring and cylinder liner friction pair performance.