Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Lubrication Characteristics of Laser Textured Parallel Thrust Bearing: Part 1 - Effect of Dimple Depth

Laser Texturing한 평행 스러스트 베어링의 윤활특성 : 제1보 - 딤플깊이의 영향

  • Park, Tae-Jo (School of Mechanical & Aerospace Engineering, ERI, Gyeongsang National University) ;
  • Hwang, Yun-Geon (Graduate School, Dept. of Mechanical & Aerospace Engineering, Gyeongsang National University)
  • 박태조 (경상대학교 기계항공공학부.공학연구원) ;
  • 황윤건 (경상대학교 대학원)
  • Published : 2009.10.31
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Abstract

Laser surface texturing (LST) methods are applied recently to generate micro-dimples in machine components having parallel sliding surfaces such as thrust bearings, mechanical face seals and piston rings, etc. And it is experimentally reported by several researchers that the micro-dimpled bearing surfaces can reduce friction force. Until now, however, theoretical results for various dimple parameters are not fully presented. In this paper, a commercial computational fluid dynamics (CFD) code, FLUENT is used to investigate the effect of dimple depth on the lubrication characteristics of parallel thrust bearing. The results show that the pressure, velocity and density distributions within dimples are highly affected by dimple depths and cavitation conditions. Adoption of micro-dimple on the bearing surface can reduce the friction force highly and its levels are affected by dimple depth. The numerical methods and results can be use in design of optimum dimple characteristics to improve thrust bearing performance.

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References

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