活塞环润滑油膜厚度影响因素的模拟试验研究

Experimental Research of Factors Affecting on Piston Ring Oil Film Thickness

设计搭建了一种新型活塞环-缸套模拟试验机,用旋转机构代替了传统的往复机构,实现了高速工况的模拟;并配置加热源,以有效模拟缸内的热状态。利用试验机,通过正交试验与单变量试验,研究分析了润滑油入口温度（60~80℃）、活塞环摩擦面温度（60~100℃）、摩擦面相对运动速度（4.67~19.36m/s）和摩擦面承载力（55~95N）四个因素在上述参数取值范围内对润滑油膜厚度的影响规律。研究结果表明：在上述参数范围内,四个因素对油膜厚度的影响敏感度的主次关系为滑块摩擦面温度〉摩擦面间的相对运动速度〉润滑油入口温度〉摩擦面承载力。

A rotational test-rig with heating source were developed to simulate the actual high tempera- ture and high speed reciprocating operation conditions. By single variable and orthogonal test method, effects of relative speed（4.67~19.36 m/s）, surface load（55~95 N）, inlet oil temperature（60~80 ℃ ） and ring-face temperature （60~100 ℃）on oil film thickness were researched. It is revealed that in above ranges, the af- fecting sensitivity order of four factors is as follows： ring surface temperature relative speed inlet oil tempera- ture surface load.