속도의 영향에 따른 3차원 거친 표면의 혼합윤활해석
Effect of Sliding Velocity on 3D Rough Surface in Mixed Lubrication Regime
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This study examined the effects of surface roughness in the mixed lubrication regime of smooth and rough surfaces for roller bearings. The average flow model was adopted for interaction between the flow rheology of the lubricant and the surface roughness. The average Reynolds equation and related flow factor that describes the coupled effects of surface roughness and flow rheology, the viscosity–pressure and density–pressure equations, the elastic deformation equation, and the force balance equation were solved simultaneously. The results showed that the effects of surface roughness on the film thickness and pressure distribution should be considered,especially in elastohydrodynamic lubrication contact problems.
Abstract
This study examined the effects of surface roughness in the mixed lubrication regime of smooth and rough surfaces for roller bearings. The average flow model was adopted for interaction between the flow rheology of the lubricant and the surface roughness. The average Reynolds equation and related flow factor that describes the coupled effects of surface roughness and flow rheology, the viscosity–pressure and density–pressure equations, the elastic deformation equation, and the force balance equation were solved simultaneously. The results showed that the effects of surface roughness on the film thickness and pressure distribution should be considered,especially in elastohydrodynamic lubrication contact problems.
참고문헌 (6)
- Tzeng, S.T., "Surface Roughness Effect on Slider Bearing Lubrication", ASLE, Trans, 10, pp.334~ (1967)
- H. Christensen, "The Hydrodynamic Lubrication of Rough Journal Bearings", ASME, J. Lubri. Tech., pp.166~172 (1973)
- Patir, N., "An average Flow Model for Determining Effects of Three-Dimensional Roughness on Patial hydrodynamic Lubrication", ASME, J. Lubri. Tech., 100, pp.12~17 (1978)
- Patir, N., "Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces", ASME, J. Lubri. Tech., 101, pp.220~230 (1979)
- Love. A. E. H, "Stress Produced in a Semi-Infinite Solid by Pressure on Part of the Boundary", Phil. Trans. Royal Society, A228, pp.377~420 (1929)
- Mihai B. Dobrica, "Mixed Elasto hydrodynamic Lubrication in a Partial Journal Bearing- Comparison Between Deterministic and Stochastic Models", ASME, Journal of Tribology, 128, pp.778~788 (2006)