Understanding micropitting in gears
Understanding micropitting in gears
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DOI：
10.1177/0954406215606934
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发表时间：
2016-04-01
影响因子：
2
通讯作者：
Snidle, R. W.
中科院分区：
文献类型：
--
作者：
Clarke, A.;Evans, H. P.;Snidle, R. W.
微点蚀是一种严重的侵蚀磨损形式，它可能发生在传动齿轮的齿上。它与粗糙度效应和表面疲劳有关，已成为风力涡轮机提速齿轮箱中的一个特殊问题。本文通过对实际工况下齿轮齿面接触力学和弹流润滑特性的分析，综述了作者在理解齿轮微点蚀基本机理方面所作的贡献。结果表明，EHL膜厚度与粗糙度（比值）对预测接触和近表面疲劳有重要影响。塑性变形的重要影响，发生在齿轮磨合的初始阶段，也进行了研究，并表明，显著的残余效应，这可能有助于早期形成的表面裂纹。
Micropitting is a serious form of erosive wear, which can occur on the teeth of transmission gears. It is associated with roughness effects and surface fatigue and has become a particular problem in the speed-increasing gearboxes of wind turbines. This paper reviews the contributions which the authors have made towards an understanding of the basic mechanism of micropitting in gears based on analysis of the contact mechanics and elastohydrodynamic lubrication (EHL) of gear tooth surfaces under realistic operating conditions. Results are presented which demonstrate the crucial influence of EHL film thickness in relation to roughness (the ratio') on predicted contact and near-surface fatigue. The important effect of plastic deformation, which takes place during the initial stage of running-in of gears, has also been investigated, and it has been shown that significant residual effects occur, which can contribute to the early formation of surface-initiated cracks.