基于弹流润滑的直齿轮动态效率模型及验证  

Modeling of Dynamic Efficiency of Spur Gear Pairs Based on Elastohydrodynamic Lubrication and Its Validation

作　　者：陈辛波[1] 卢志坚[1] 

机构地区：[1]同济大学新能源汽车工程中心,上海201804

出　　处：《同济大学学报（自然科学版）》2013年第5期773-778,共6页Journal of Tongji University:Natural Science

基　　金：国家"八六三"高技术研究发展计划(2012AA110701);国家"九七三"重点基础研究发展计划(2011CB711202)

摘　　要：分析基于弹流润滑状态的直齿轮啮合特性及规律,考察摩擦因子、载荷分配及油膜厚度等关键因子的计算公式,建立基于MATLAB/Simulink的机械动态效率数学模型.以1对齿轮沿啮合线从啮入到啮出为1个周期,将啮合区间划分为4部分分别进行平均滑动摩擦和滚动摩擦功耗的积分计算,同时为表征实际情况中润滑油粘度变化带来的影响引入润滑油粘度变化修正因子.仿真结果与试验数据及已有数学模型的对比分析验证了所建动态效率模型的准确性.The characteristics and law of spur gears meshing were analyzed based on the elastohydrodynamic lubrication. Then a MATLAB/Simulink model was proposed for the prediction of mechanical dynamic efficiency of spur gear pairs by investigating on the computational formulas of key factors such as friction coefficients, load distribution, film thickness and so on. A period defined from the start point of meshing to the end point of meshing along line of action was divided into four parts for an easier computation of the average sliding and rolling power losses. Meanwhile, a modifying factor was rationally introduced to account for the effect of variable lubricant viscosity. The simulation results were compared with test data and the results from other prediction models. The comparative results show that the proposed prediction model is accurate.

关 键 词：直齿轮 动态效率 数学模型 摩擦因子 粘度变化修正因子 

分 类 号：TH117.1[机械工程—机械设计及理论]