摩擦学系统特征信息关系的试验研究

Testing study on relationship of characteristic information in tribological system

针对摩擦学系统特征信息的多样性以及设备在运行寿命期内表现出的磨损规律性,以齿轮箱摩擦学系统为研究对象,建立试验齿轮箱摩擦学特征信息系统.对采集到的齿轮疲劳磨损试验润滑油采用油液分析方法试验研究了系统润滑油黏度与磨损特征信息间的表现关系及内在机理,考察磨粒及油液变质物在试验寿命期内的变化行为,采用扫描电镜和能谱分析磨粒的表面形貌及成分变化.试验与分析结果表明,润滑油黏度的增加具有与磨损信息相似的时间累积性,在磨合期、正常期和故障期三个阶段,润滑油黏度受到不同程度的磨损磨粒、油品变质物、摩擦聚合物及油泥的综合影响,其黏度变化与磨损参数变化具有良好的映射关系.

Aiming at diversity of the characteristic information and regularity during the service life in the tribological system, the tribological characteristic information system of gearbox selected as the object of study was established. Relationship and inherent mechanism between viscosity of lubricating oil and wear information were investigated experimentally through adopting the oil a- nalysis method for the collected oil during the fatigue wear test of gears. The behaviors of wear debris and oil deterioration were studied at the testing life, the surface morphology and composi- tion of wear debris were investigated by SEM and EDS. The results indicate that the increase of the viscosity of lubricating oil has similarity with that of the wear information, namely, these characteristic information have the time cumulative characteristics. At the three stage of run-in period, normal period and fault period, the viscosity of lubricating oil is affected synthetically by wear debris, oil deterioration, friction polymers and oil sludge, change of its viscosity and change of wear parameter have the good mapping relationship.