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Effect of roughness on sealing performance of oil seals with surface texture

Fuying Zhang (College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, China)
Junmei Yang (College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, China)
Haoche Shui (College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, China)
Chengcheng Dong (College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Publication date: 17 July 2019

Abstract

Purpose

This paper aims to obtain the film thickness, friction torque and pumping rate and analyze the effects of roughness and surface micro-dimple texture (circular, square and equilateral triangle) on the performance of the oil seal.

Design/methodology/approach

On the basis of elastohydrodynamic lubrication and the pumping mechanism of rotating shaft seal, this paper establishes a numerical model of hybrid lubrication of oil seal in sealing area. The model is coupled with fluid mechanics, rough peak contact mechanics and deformation analysis.

Findings

The results show that surface texture significantly improves the lubrication properties of the oil seal. The oil seal with the square texture has the largest oil film thickness, while the equilateral triangle texture has a better effect on the pumping rate.

Originality/value

To get closer to the real working environment of the oil seal, based on the surface roughness, this paper studies the effect of the texture shapes applied to the oil seal lip surface on the performance of the oil seal. The critical roughness and rotational speed values with zero pumping rate are obtained, which provides a theoretical basis for the correct selection of oil seals.

Keywords

Acknowledgements

The work reported in this paper was supported by the Natural Science Foundation of Tianjin (Grant No. 17JCZDJC38800).

Citation

Zhang, F., Yang, J., Shui, H. and Dong, C. (2019), "Effect of roughness on sealing performance of oil seals with surface texture", Industrial Lubrication and Tribology, Vol. 72 No. 4, pp. 525-532. https://doi.org/10.1108/ILT-03-2019-0069

Publisher

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Emerald Publishing Limited

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