A Starved Mixed Elastohydrodynamic Lubrication Model for the Prediction of Lubrication Performance, Friction and Flash Temperature With Arbitrary Entrainment Angle
A Starved Mixed Elastohydrodynamic Lubrication Model for the Prediction of Lubrication Performance, Friction and Flash Temperature With Arbitrary Entrainment Angle
复制标题
用于预测任意夹带角润滑性能、摩擦和闪蒸温度的饥饿混合弹流润滑模型
DOI：
10.1115/1.4037844
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发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Jiaxu Wang
中科院分区：
文献类型：
--
作者：
wei pu;Dong Zhu;Jiaxu Wang
在本研究中，考虑了加工表面粗糙度、任意夹带速度角、饥饿和空化，建立了一种改进的混合润滑模型。通过将得到的数值结果与已有的弹流润滑数据进行比较，对模型进行了验证。在广泛的工况下，综合分析了进口供油条件对椭圆接触的饥饿和空化、混合EHL特性、摩擦和闪蒸温度的影响。此外，还讨论了在不同缺氧润滑条件下，粗糙度取向对膜厚和摩擦的影响。结果表明，由于表面粗糙度的影响，入口缺食导致平均膜厚明显减小，刺间空化面积增加，从而导致刺接触、摩擦和闪蒸温度显著增加。此外，在缺氧润滑条件下，夹带角对膜厚的影响会减弱。此外，结果表明，如果考虑饥饿，横向粗糙度比各向同性和纵向粗糙度产生更厚的EHL膜和更小的摩擦。因此，饥饿混合EHL模型可以被认为是一个有用的工程工具，可用于工业应用。
In this study, a modified mixed lubrication model is developed with consideration of machined surface roughness, arbitrary entraining velocity angle, starvation, and cavitation. Model validation is executed by means of comparison between the obtained numerical results and the available starved elastohydrodynamic lubrication (EHL) data found from some previous studies. A comprehensive analysis for the effect of inlet oil supply condition on starvation and cavitation, mixed EHL characteristics, friction and flash temperature in elliptical contacts is conducted in a wide range of operating conditions. In addition, the influence of roughness orientation on film thickness and friction is discussed under different starved lubrication conditions. Obtained results reveal that inlet starvation leads to an obvious reduction of average film thickness and an increase in interasperity cavitation area due to surface roughness, which results in significant increment of asperity contacts, friction, and flash temperature. Besides, the effect of entrainment angle on film thickness will be weakened if the two surfaces operate under starved lubrication condition. Furthermore, the results show that the transverse roughness may yield thicker EHL films and lower friction than the isotropic and longitudinal if starvation is taken into account. Therefore, the starved mixed EHL model can be considered as a useful engineering tool for industrial applications.
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DOI：
10.1115/1.3453074
发表时间：
1977-01-01
期刊：
JOURNAL OF LUBRICATION TECHNOLOGY-TRANSACTIONS OF THE ASME
影响因子：
--
作者：
HAMROCK, BJ;DOWSON, D
通讯作者：
DOWSON, D
DOI：
10.1243/1350650001543304
发表时间：
2000-05
期刊：
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
影响因子：
--
作者：
D. Jalali-Vahid;Homer Rahnejat;R. Gohar;Z. Jin
通讯作者：
D. Jalali-Vahid;Homer Rahnejat;R. Gohar;Z. Jin
影响因子：
2.1
作者：
K. Stahl;K. Michaelis;J. Mayer;Alexander Weigl;T. Lohner;M. Omasta;M. Hartl;I. Křupka
通讯作者：
K. Stahl;K. Michaelis;J. Mayer;Alexander Weigl;T. Lohner;M. Omasta;M. Hartl;I. Křupka
影响因子：
2.1
作者：
D. Zhu;Herbert S. Cheng;B. Hamrock
通讯作者：
D. Zhu;Herbert S. Cheng;B. Hamrock
影响因子：
6.2
作者：
Jing Wang;S. Qu;P. Yang
通讯作者：
Jing Wang;S. Qu;P. Yang