Experimental investigation on the groove effect in hydrodynamic lubrication

Experimental investigation on the groove effect in hydrodynamic lubrication
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流体动力润滑沟槽效应的实验研究

DOI:
10.1177/1350650111430288
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发表时间:
2012-04
期刊:
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
影响因子:
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在这篇文章中,一个定制的测试装置被用来测量膜厚度的保形接触由一个固定的倾斜块和一个移动的透明盘。使用了两组带槽块表面:一组在入口处具有台阶,另一组没有入口台阶。在平行间隙条件下,只有当使用具有入口台阶的表面时才能发现有效的承载润滑剂膜,并且入口区域中的部分沟槽表面可以产生大于完全沟槽表面的膜厚度。如果出口槽脊大于入口槽脊,则将获得更厚的膜以及更高的承载能力。在这项研究中,凹槽显示出负面影响的水动力升力。并不是所有的发散间隙都能形成空化,这取决于几何构型。在分析沟槽效应时,应谨慎使用经典的雷诺解。研究结果可为无空化情况下的实验提供参考。
In this article, a custom-built test apparatus was used to measure the film thickness in a conformal contact consisting of a stationary fixed-incline block and a moving transparent disc. Two groups of grooved block surfaces were used: one with a step at the inlet, and the other without the inlet step. Under parallel-gap conditions, effective load-carrying lubricant films can be found only when surfaces with an inlet step are used, and a partially grooved surface in the inlet region can generate film thickness larger than the fully grooved one. If the outlet land is larger than the inlet land, a thicker film as well as a higher load-bearing capacity will be obtained. In this study, groove shows a negative impact on the hydrodynamic lift. And not all diverging clearance can form the cavitation, as it depends on the geometry configurations. The classical Reynolds’ solutions should be carefully used in the analyses of groove effects. The results can be useful for experiments in the case in which no cavitation occurs.
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