Browse > Article

Optimum micro dimple configuration on the elastomer seal surface  

Yoo, Dae-Won (Department of Computer Aided Mechanical Design, Changwon Campus of Korea Polytechnic)
Publication Information
Design & Manufacturing / v.14, no.4, 2020 , pp. 1-10 More about this Journal
Abstract
The seal plays a role in preventing oil leakage when the lip and the rotating shaft come into contact with the fluid and air pressure. Recently, micro dimples or micro pockets are processed and used on the lubrication surfaces of thrust bearings, mechanical bearings, and piston rings. Compared to a smooth surface, micro dimples reduce friction and increase the life of parts. This paper analyzed various kinds of micro dimple shapes on the sealing surface, i.e. circle, rectangle, triangle, and trapezoid. For this purpose, Introduced the design of experiments to work out a micro dimple configuration, unlikely to be damaged from cracks and low in contact stress. As a result, the triangular dimple showed the best results. Optimal factors were dimple size 0.15 mm, dimple depth 0.0383 mm, dimple density 40%, and the maximum equivalent stress was 9.1455 MPa, and the maximum contact pressure was 9.6612 MPa. This paper analyzed the optimal shape of dimples by finite element analysis. As a research project, experiments and comparative analysis of micro dimple shapes are needed.
Keywords
Seal; Micro Dimple; Design of Experiments; Factor; Level;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Etsion, I. and Burstein, L., "A Model for Mechanical Seals with Regular Micro Surface Structure", Trans. of Tribology, Vol. 39, No. 3, pp. 677-683, 1996.   DOI
2 Etsion, I., "Analysis and Experimental Investigation of Laser-Textured Mechanical Seal face", Trans. of Tribology, Vol. 42, pp. 511-516, 1999.   DOI
3 Olver, A. V., Fowell, M. T., Spikes, H. A. and Pegg, I. G., "Inlet Suction', a Load Support Mechanism in Non-convergent, Pocketed, Hydrodynamic Bearings", Proc. IMechE, J. of Eng. Tribology, Vol. 220, pp. 105-108, 2006.   DOI
4 Hwang, Y, G., "A Study on the Lubrication Characteristics of Micro-Dimpled Parallel Thrust Bearing", Master Thesis, Gyeongsang National University, pp. 1-69, 2010.
5 Kim, S, G., Song, K, C., Kim, S, B. and Chae, Y, H., "Effects of Surface Texturing under Grease Lubrication", Journal of the KSTLE, Vol. 24, No. 5, pp. 234-240, 2008.
6 Hong, S, H., "Numerical Study on Hydrodynamic Lubrication Characteristics of Laser Textured Surfaces with Micro Dimples", Master Thesis, Chungang University, pp. 1-73, 2009.
7 Chae, Y, H, and Kim, S, S., "Influence on a density of micro-scale dimple for surface texturing on friction control", Autumn conference proceeding of the KSME, pp. 945-950, 2004.
8 Chae, Y, H, and Kim, S, S., "The effect of size on friction property of micro-dimple surface to fabricate by photolithography", Autumn conference proceeding of the KSPE, pp. 50-55, 2004.
9 Kim, J, Y., "Shape Design of Thermoplastic Polyurethane Seal for Air Cylinder using the Design of Experiment", Master Thesis, Korea Polytechnic University, pp. 1-16, 2011.
10 Park, T, J, and Lee, J, O., "Lubrication Characteristics of Micro-Textured Slider Bearing : Effect of Dimple Density", Trans. Kor. Soc. Mech. Eng. A, Vol. 37, No. 4, pp. 437-442, 2013.   DOI
11 Chae, Y, H, and Kim, S, S., "Influence on a density of micro-scale dimple for surface texturing on friction control", Autumn conference proceeding of the KSME, pp. 945-950, 2004.
12 ELETEC, MINITAB 15Ⓡ for DOE, pp. 225-307, 2008.
13 Yoo, M. H., "A Study on Design Optimization and Stress Relaxation Phenomenon on Lip Seal", Ph.D. Thesis, Graduate School of Knowledge based Technology and Energy, Korea Polytechnic University, pp. 54-73, 2009.