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ANALYSIS OF MIXED LUBRICATION EFFECTS IN SIMULATED GEAR TOOTH CONTACTS

机译:模拟齿轮齿接触中的混合润滑效应分析

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摘要

The paper presents results obtained using a transient analysis technique for point contact elastohydrodynamic lubrication (EHL) problems based on a formulation that couples the elastic and hydrodynamic equations. Results are presented for transverse ground surfaces in elliptical point contact that show severe film thinning and asperity contact at the transverse limits of the contact area. This thinning is caused by transverse leakage of the lubricant from the contact in the remaining deep valley features between the surfaces. A comparison is also made between the point contact results on the entrainment centre line and the equivalent line contact analysis. The extent of asperity contact is shown to be dependent on the Hertzian contact aspect ratio. It is also shown that transverse waviness (superimposed on the roughness) of even relatively small amplitude can lead to large increases in asperity contact rates over all waviness peaks in the contact.
机译:本文介绍了使用瞬态分析技术针对点接触弹性流体动力润滑(EHL)问题获得的结果,该公式基于耦合了弹性方程和流体动力方程的公式。呈现的结果是椭圆形点接触的横向接地表面,在接触区域的横向极限处显示出严重的薄膜变薄和粗糙接触。这种变薄是由于润滑剂从表面之间剩余的深谷特征中的触点横向泄漏引起的。还比较了夹带中心线上的点接触结果和等效线接触分析。显示粗糙接触的程度取决于赫兹接触的长宽比。还显示出,即使相对较小的幅度的横向波纹(叠加在粗糙度上)也可以导致整个接触峰上的凹凸接触率大大提高。

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