Effect of Indentation at Rolling Body Surfaces on the Film Formation in Elastohydrodynamic Lubrication Contact under Dynamic Loads

Dedi Rosa Putra Cupu, Kahar Osman
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引用次数: 0

Abstract

Vibration is one of the phenomena that can occur during the operation of roller bearing which can lead to dynamic loads being subjected to the contact and thus, affect the film formation in elastohydrodynamic (EHD) contacts. On the other hand, surface textures such as artificial indentations and grooves greatly affect the film formation as well as the corresponding pressure distribution in the contact area, since the depths of the textures are usually much greater than the film thickness in the contact. This paper investigates the influence of an artificial indentation located on the rolling element, which passes through a point contact under dynamic loads by means of numerical simulations. Solutions to the Reynolds equation are performed and calculations of the elastic deformation equation, force balance equation and lubricant properties equations to show the effects of both indentation passing through the contact and a sinusoidal dynamic load on the film thickness as well as pressure profile of EHD point contact. Moreover, the effect of frequency and amplitude excitation of the dynamic load on the film formation was investigated. The results revealed that the artificial indentation under sinusoidal dynamic load of EHD point contact induced a significant effect on the thickness of the film formation and pressure distribution.
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滚动体表面的压痕对动态载荷下弹性流体动力润滑接触中油膜形成的影响
振动是滚子轴承运行过程中可能发生的现象之一,它会导致接触面承受动载荷,从而影响弹性流体动力(EHD)接触中的薄膜形成。另一方面,人工压痕和沟槽等表面纹理会极大地影响薄膜的形成以及接触区域内相应的压力分布,因为纹理深度通常远大于接触中的薄膜厚度。本文通过数值模拟研究了位于滚动体上的人工压痕的影响,滚动体在动态载荷下通过点接触。通过对雷诺方程的求解以及对弹性变形方程、力平衡方程和润滑剂特性方程的计算,显示了通过接触点的压痕和正弦动态载荷对 EHD 点接触的薄膜厚度和压力曲线的影响。此外,还研究了动载荷的频率和振幅激励对薄膜形成的影响。结果表明,在 EHD 点接触正弦动载荷下的人工压痕对成膜厚度和压力分布有显著影响。
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来源期刊
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences Chemical Engineering-Fluid Flow and Transfer Processes
CiteScore
2.40
自引率
0.00%
发文量
176
期刊介绍: This journal welcomes high-quality original contributions on experimental, computational, and physical aspects of fluid mechanics and thermal sciences relevant to engineering or the environment, multiphase and microscale flows, microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.
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