Effect of Shaft Surface Roughness on the Performance of Radial Lip Seals
Effect of Shaft Surface Roughness on the Performance of Radial Lip Seals
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DOI：
10.3390/lubricants6040099
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发表时间：
2018-11
期刊：
影响因子：
3.5
通讯作者：
E. Kozuch;P. Nomikos;R. Rahmani;N. Morris;H. Rahnejat
中科院分区：
文献类型：
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作者：
E. Kozuch;P. Nomikos;R. Rahmani;N. Morris;H. Rahnejat
减少轴-径向唇形密封接头的泄漏对于确保整个润滑系统的持久性能至关重要。本文研究了采用不同制造工艺完成的三种轴类表面的渗漏情况。表面形貌的测量是为了确定与实际应用中观察到的密封性能相对应的相关粗糙度参数。研究发现，表面形貌的偏斜度与传闻中的泄漏故障率有很好的相关性。为了量化这种关联，开发了一个流体动力学模型，以确定性的方式考虑竖井粗糙度。数值分析结果表明，表面高度分布为负偏角的情况下，润滑油质量流量较正偏角分布的情况下有所降低。
Reduction of leakage from the shaft–radial lip seal conjunction is critical in ensuring enduring performance of entire lubrication system. This paper investigates leakage from three types of shaft surfaces, finished using different manufacturing processes. The measurement of surface topography is conducted in order to determine the pertinent roughness parameters which correspond to the observed sealing performance in real practical applications. It is found that the skewness of the surface topography correlates well with the anecdotal leakage failure rate. To quantify this association, a hydrodynamic model, accounting for shaft roughness in a deterministic manner is developed. The results from the numerical analyses confirm that the lubricant mass flow rate is reduced in the case of negatively skewed surface height distributions, when compared with the positively skewed profiles.