缸套微观形貌对缸套-活塞环振动及润滑性能的影响

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摩擦副表面的微观几何形貌对缸套-活塞摩擦副性能有着较大影响,而该摩擦副的润滑性能直接与机身振动相关。通过在缸套表面加工坑、槽,在专用摩擦磨损试验机上进行试验,监测柴油机机身振动信号,对比分析不同转速、不同缸套条件下的活塞横向撞击情况,同时获取不同缸套的缸套-活塞环的摩擦学信息,并分析缸套形貌对摩擦性能的影响机理。结果表明,在缸套内表面加工一定的坑和槽,可以有效改善缸套-活塞环在高转速情况下的摩擦性能。 The micro-geometrical structure has a great impact on the lubricating performance of cylinder liner-piston ring,while the lubricating is related to the vibration of the engine directly.Through monitoring the block vibration signals of the engine,the condition of the engine can be evaluated.In this study,the pits and slots at the liner inner surface are processed and the experiments on the tester are conducted to investigate the influence of liner micro-geometrical structure on the piston transverse impact at different rotating speed and different cylinder.Then,the tribology information of cylinder liner-piston ring assembly is obtained and the mechanism between micro-geometrical structure and lubricating performance was analyzed.Experimental results show that some pits and slots on the inner surface of the cylinder liner can properly improve the lubrication capability of cylinder liner-piston ring at a high rotating speed in diesel engine.