Effect of contact path on the mixed lubrication performance, friction and contact fatigue in spiral bevel gears
Effect of contact path on the mixed lubrication performance, friction and contact fatigue in spiral bevel gears
复制标题
接触路径对弧齿锥齿轮混合润滑性能、摩擦及接触疲劳的影响
DOI：
10.1016/j.triboint.2018.03.015
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发表时间：
2018-07-01
影响因子：
6.2
通讯作者：
Xiao, Ke
中科院分区：
文献类型：
--
作者：
Cao, Wei;Pu, Wei;Xiao, Ke
螺旋锥齿轮的接触轨迹对齿轮的润滑破坏和表面失效有重要影响。然而，现有的研究主要集中在接触路径对接触应力分布的影响上，假设接触为干接触，表面光滑。在现实中，这些齿轮是润滑的，表面是相当粗糙的三维（3D）地形。在考虑表面粗糙度的情况下，系统地研究了接触路径对螺旋锥齿轮混合润滑特性、摩擦和接触疲劳的影响。在加载齿接触分析（LTCA）的基础上，对不同接触路径下受装配参数影响的齿轮传动几何、运动学和接触载荷进行了综合分析。基于新建立的螺旋锥齿轮混合EHL模型，对其在大工况下的润滑特性、摩擦系数、闪蒸温度以及疲劳寿命进行了研究。结果表明，接触路径对提高润滑性能、提高效率和防止疲劳起着至关重要的作用。由于膜厚度小、摩擦系数大、闪蒸温度高、相对疲劳寿命低，齿轮侧趾附近的接触路径表现为弱路径。
The contact path in spiral bevel gears may have significant effect on the lubrication breakdown and surface failure. However, available study mainly focus on the influence of contact path on the contact stress distribution with the assumptions of dry contact and smooth surface. In reality, these gears are lubricated and the surfaces are quite rough with three-dimensional (3D) topography. The present study aims to systematically investigate the effect of contact path on the mixed lubrication characteristics, friction and contact fatigue in spiral bevel gears with the consideration of surface roughness. A comprehensive analysis for gearing geometry, kinematics, and contact load with different contact path affected by assembling parameters is executed based on the loaded tooth contact analysis (LTCA). The corresponding lubrication characteristics, friction coefficient and flash temperature, as well as the fatigue life are conducted in a wide range of operating condition based on a recently developed mixed EHL model for spiral bevel gears. Obtained results reveal that the contact path is vital to lubrication performance, efficiency improvements and fatigue prevention. In particular, the contact path nearby toe of gear flank appears to be a weak path due to the smaller film thickness, larger friction coefficient, higher flash temperature and lower relative fatigue life.