基于GT-Suite的活塞环-缸套摩擦特性研究

摘要

以活塞环-缸套为研究对象,利用GT-Suite软件建立了活塞环-缸套摩擦模型,将摩擦、润滑和动力学三者耦合起来,同时考虑了活塞环和缸套的扭曲变形、接触表面粗糙度等因素,计算分析标定工况下活塞环-缸套的油膜厚度、油压分布、摩擦力和摩擦功耗.着重分析了不同润滑油温和不同转速条件下第一环油膜厚度和摩擦功耗,结果表明:第一道活塞环处润滑效果差、摩擦功耗高;随着油温升高,油膜厚度显著减少,同时摩擦功耗显著减少,综合考虑润滑和摩擦功耗,发现油温在80~90 ℃时摩擦特性较为理想;随着转速提高,油膜厚度增加,同时摩擦功耗增加,转速对油膜厚度影响较小,对摩擦功耗有显著影响.%Taking the piston ring and cylinder liner pair as the research object,the model of piston ring and cylinder liner pair was established by coupling the friction,lubrication and dynamics with GT-Suite software,the distortion of piston ring and cyl-inder liner and the surface roughness were considered,and then the oil film thickness,oil pressure distribution,friction stress and friction power loss at rated conditions were calculated and analyzed.The oil film thickness and friction power loss of the first piston ring were mainly analyzed under different temperatures and speeds.The results showed the bad lubrication effect and high friction power loss in the first piston ring.With the increase of oil temperature,both the oil film thickness and the friction power loss decreased obviously.It was found that the friction performance between 80 ℃ and 90 ℃ was optimal.With the increase of speed,both the oil film thickness and the friction power loss increased.In general,the speed had little influence on the oil film thickness and significant impact on the friction power loss.