Laser Texturing한 평행 스러스트 베어링의 윤활특성 : 제1보 - 딤플깊이의 영향
Lubrication Characteristics of Laser Textured Parallel Thrust Bearing : Part 1 - Effect of Dimple Depth
2
조회
0
다운로드
9
인용
0
참고문헌
키워드
초록
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.
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.
참고문헌 (12)
- Etsion, I, "Improving Tribological Performance of Mechanical Components by Laser Surface Texturing", Tribology Letters, 17, pp.733~737 (2004)
- Etsion, I, "State of the Art in Laser Surface Texturing", Trans. ASME, J. of Tribology, 127, pp.248~253 (2005)
- Etsion, I, "The Validity of the Reynolds Equation in Modeling Hydrostatic Effects In Gas Lubricated Textured Parallel Surfaces", Trans. ASME, J. of Tribology, 128, pp.345~ (2006)
- Olver, A. V, "Inlet Suction’, a Load Support Mechanism in Non-convergent, Pocketed, Hydrodynamic Bearings", Proc. IMechE, J. of Eng. Tribology, 통권 : 220, pp.105~108 (2006)
- Fowell, M, "Entrainment and Inlet Suction : Two Mechanisms of Hydrodynamic Lubrication in Textured Bearings", Trans. ASME, J. of Tribology, 129, pp.221~230 (2007)
- Dzodzo, M, "Pressure and Flow Characteristics in a ShallowHydrostatic Pocket with Rounded Pocket", Land Joints, 1996, pp.29, 69~76
- Chen, P. Y. P, "Use of Computational Fluid Dynamics in Hydrodynamic Lubrication", Proc. IMechE, J. of Eng. Tribology, 212, pp.427~436 (1998)
- Helene, M, "Numerical Study of the Pressure Pattern in a Two-Dimensional Hybrid Journal Bearing Recess, Laminar, and Turbulent Flow Results", Trans. ASME, J. of Tribology, 125, pp.283~290 (2003)
- Brajdic-Mitidieri, P, "CFD Analysis of a Low Friction Pocketed Pad Bearing", Trans. ASME, J. of Tribology, 127, pp.803~812 (2005)
- 박태조, "2차원 미세 포켓이 있는 무한장 Slider Bearing의 CFD 해석", 한국윤활학회지, 25(1), pp.43~48 (2009), 한국윤활학회
- 박태조, "Groove 단면형상에 따른 유압 Spool Valve의 윤활해석", 한국윤활학회지, 25(1), pp.13~19 (2009), 한국윤활학회
- FLUENT, "FLUENT 6.0 Manual", ~ (2002)