内啮合齿轮传动的弹流润滑  

Study on Elastohydrodynamic Lubrication of Internal Gear Transmission

作　　者：鲍培德[1] 谢俊[1] 尹小琴[1] 杨启志[1] 马履中[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《机械设计与研究》2011年第2期26-28,32,共4页Machine Design And Research

基　　金：国家自然科学基金资助项目(50905077)

摘　　要：基于弹性流体动力润滑理论,建立了内啮合齿轮传动的弹流润滑模型。针对行星齿轮变速传动的两种工况,求出内齿轮和行星齿轮内啮合时各个啮合点的最小油膜厚度,绘出沿啮合线的弹流油膜厚度分布图。经过对膜厚图的分析得知,在行星轮和内齿轮啮合的节点靠近行星轮齿根处是油膜厚度的最薄弱处,且变速传动时,低速传动的内啮合工况润滑状态较差;经计算对比得出提高润滑油的粘度,可以增大润滑油膜的厚度;增大压力角提高油膜厚度的效果明显。提高齿轮啮合的油膜厚度对改善齿轮的润滑状态,降低齿轮的生产成本,具有实际使用价值。Based on elastic hydrodynamic lubrication（EHL） theory,an EHL model of the internal meshing between ring gear and planet gear in Planetary Gear Transmission was established.The EHL oil film thicknesses and their distributions for two operation cases on meshing line were calculated： one case with the sun gear as the driving gear and the another with the ring gear as the driving gear.The worse lubrication occurred near the root of the tooth of the planetary gear in second case.Through the comparison of many calculations,the lubrication oil film thickness can be significantly increased by raising the oil viscosity and gear pressure angle.Such a measure can improve the gear lubrication,prevent wearing and reduce the gears production cost so it has great practical value.

关 键 词：弹性流体动力润滑 油膜厚度 内啮合 粘度 压力角 

分 类 号：TH117[机械工程—机械设计及理论] TH132