| WANG Zhi-jun,TIAN Peng-hui,GUO Feng.Effects of Non-heterogeneous Affinity Interface on Hydrodynamic Lubricant Films[J],46(6):35-41 |
| Effects of Non-heterogeneous Affinity Interface on Hydrodynamic Lubricant Films |
| Received:January 05, 2017 Revised:June 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.06.006 |
| KeyWord:fluid hydrodynamic lubrication non-heterogeneous affinity boundary slip oil film thickness |
| Author | Institution |
| WANG Zhi-jun |
School of Mechanical Engineering, Qingdao Technological University, Qingdao , China |
| TIAN Peng-hui |
School of Mechanical Engineering, Qingdao Technological University, Qingdao , China |
| GUO Feng |
School of Mechanical Engineering, Qingdao Technological University, Qingdao , China |
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| Abstract: |
| The work aims to investigate effects of heterogeneous affinity interface on hydrodynamic lubricant film thickness at hydrodynamic pressure. Tensional modification was performed to obtain interfaces of different affinities, including different parts on surfaces of different heterogeneous affinities, i.e., non-homogeneous affinity surface. Homogeneous AF slider and non-homogeneous AF slider were obtained by modifying plain steel slider with anti-finger-print oil (AF). Variation of film thickness with inclination was measured for steel slider, inlet-AF slider, outlet-AF slider and whole-surface AF slider. Meanwhile, homogeneous AF stair slider was obtained by modifying stair slider with anti-finger-print oil (AF), and variation of film thickness with speed was measured for step-1.5 slider and AF step-1.5 slider under provided with θ = 0 and θ = 1:2231, respectively. Film thickness of four slider increased first and then decreased with the increase of inclination, optimum inclination existed. And film thickness of steel slider, heterogeneous affinity slider and AF slider decreased in sequence. Besides, film thickness of AF step-1.5 slider was always lower than that of step-1.5 slider. Provided with film lubrication at hydrodynamic pressure, affinity of the solid/liquid interface can obviously influence film thickness. Selective modification of sample surface can endow surface wettability with regional difference and induce low film thickness, which is attributed to the side leakage in parts of lower affinity despite of the slippage step effect. |
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