内燃机活塞环-缸套摩擦学特性试验研究

Experimental study on tribological characteristics of piston ring and cylinder liner for internal combustion engine

以活塞环、缸套小样为试件,在Rtec MFT-5000型多功能摩擦磨损试验机上进行活塞环-缸套试件摩擦学特性模拟试验,研究富油润滑条件下,不同载荷、不同往复频率工况下7种不同表面结构试件的摩擦学性能。试验结果表明:缸套表面粗糙度并非越小、越光滑越好,不同的工况应匹配不同的粗糙度,粗糙度匹配合理可减小摩擦副的摩擦因数;不同表面织构对工况变化的响应不同,在适合的工况下合理的织构设计可以减小摩擦和摩擦力波动,不合理的织构设计使摩擦副的润滑情况变差。

The tribological properties of piston ring-cylinder liner specimens are investigated on RTEC MFT-5000 multifunctional friction and wear testing machine.The tribological properties of seven different surface structures under oil-rich lubrication conditions with different loads and reciprocating frequencies are studied.The experimental results show that the smoother the surface roughness of the cylinder liner is not the better,and there are different roughness matching under different working conditions.The appropriate roughness matching can reduce the friction coefficient of the friction pair.Different surface structures have different responses to the change of working conditions.Reasonable texture design can reduce the friction and friction fluctuation under suitable working conditions,while unreasonable texture design will make the lubrication of friction pair worse.