The helicopter transmission system generally employs oil injection lubrication, while the tooth surface often operates under mixed lubrication. In the case of mixed lubrication, the relationship among the fluid flow, rough contact, and material wear renders it quite difficult to establish a predictive model for wear and lubrication coupling. The present study involved, in consideration of the effect of tooth surface micro-morphology, establishing a coupling analysis model for the wear characteristics of involute gear mixed lubrication. The effects of the mixture of squalane base oil and 15% (by weight) polyisoprene(SQL+PIP), polyalphaolefin oil (PAO6) and mineral SN100 on the distribution of lubrication performance parameters and the wear characteristics were analyzed. The results revealed that the film thickness of SQL+PIP was higher than that of PAO6 and SN100, and the coefficient of friction is lower. In addition, the increase in lubricant viscosity was conducive to reducing the contact area and load ratios of direct rough contact, which was, in turn, beneficial to reducing wear.

直升机传动系统一般采用注油润滑，而齿面常采用混合润滑。在混合润滑的情况下，流体流动、粗糙接触和材料磨损之间的关系使得建立磨损和润滑耦合的预测模型非常困难。本研究考虑到齿面微观形貌的影响，建立了渐开线齿轮混合润滑磨损特性的耦合分析模型。分析了角鲨烷基础油与15%（重量比）聚异戊二烯（SQL+PIP）、聚α烯烃油（PAO6）和矿物SN100的混合物对润滑性能参数分布和磨损特性的影响。结果表明，SQL+PIP的膜厚高于PAO6和SN100，摩擦系数较低。此外，润滑剂粘度的增加有利于减小直接粗接触的接触面积和载荷比，进而有利于减少磨损。