| HAN Xiang.EHL Analysis of Textured Fractal Surface Based on Thermal Effect[J],46(12):141-146 |
| EHL Analysis of Textured Fractal Surface Based on Thermal Effect |
| Received:May 08, 2017 Revised:December 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.12.023 |
| KeyWord:thermal effect texture fractal surface elastohydrodynamic lubrication lubrication property |
| Author | Institution |
| HAN Xiang |
Jiangsu Provincial Key Laboratory of Large Engineering Equipment Detection and Control, Xuzhou Institute of Technology, Xuzhou , China |
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| Abstract: |
| The work aims to study the variation of thermal elastohydrodynamic lubrication (EHL) property of textured surface with fractal dimension and texture parameters. Based on the thermal effect, the EHL model of the textured surface was established and nondimensionalized and solved in the method of multigrid programming. The effects of texture parameters and fractal parameters on hydrodynamic lubrication property of the textured fractal surface were revealed based upon comparative analysis of the maximum pressure, the minimum film thickness and friction factor between friction surfaces under various working conditions. With the increase of texture depth, the minimum film thickness decreased, the maximum pressure and solid interface temperature increased, and there was the minimum in friction coefficient-texture depth curve. Although fractal dimensions were different, the minimum of the friction factor-texture depth curve appeared in the same texture depth. When texture depth was constant, the maximum pressure and solid interface temperature decreased while the average friction coefficient increased as the dimension increased. There were minimums in the minimum film thickness-texture density curve and friction coefficient-texture density curve. There were maximums in the maximum pressure-texture density and the solid interface temperature-texture density curve. When texture density was the same, the maximum pressure and solid interface temperature decreased while the friction coefficient increased as the fractal dimension increased. The larger the fractal dimension is, the larger the friction coefficient of the friction pair surface is, but there are minimums in both the friction factor-texture depth and friction factor-texture density curve. |
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