本文選題：熒光漂白成像　切入點(diǎn)：微間隙　出處：《摩擦學(xué)學(xué)報(bào)》2017年04期

【摘要】：沿潤(rùn)滑油膜厚度方向的剪切流速分布是影響機(jī)械部件潤(rùn)滑性能的重要因素.為此,搭建了基于熒光漂白成像的微間隙油膜剪切流速分布測(cè)量平臺(tái).通過(guò)對(duì)漂白區(qū)域形狀演化過(guò)程進(jìn)行圖像分析,獲得了微米量級(jí)間隙中的PB450和PAO6潤(rùn)滑油膜的剪切速度分布.結(jié)果表明:在設(shè)定測(cè)試條件下,厚度為8.5μm的PB450油膜沿膜厚方向的剪切流速近似為典型的線性分布,而相同厚度下的PAO6油膜流速分布表現(xiàn)為非線性塞流,界面附近油膜黏度較中層顯著下降.研究還發(fā)現(xiàn),同一滑動(dòng)速度下,PAO6剪切流速偏離線性分布的程度隨膜厚的降低而增加.經(jīng)過(guò)比對(duì)分析,試驗(yàn)結(jié)果與流體動(dòng)壓潤(rùn)滑條件下的相關(guān)數(shù)據(jù)吻合.
[Abstract]:The shear velocity distribution along the direction of lubricating oil film thickness is an important factor affecting the lubricating performance of mechanical components. A measuring platform of shear velocity distribution of microgap oil film based on fluorescence bleaching imaging was built. The shape evolution process of bleaching region was analyzed by image analysis. The shear velocity distribution of PB450 and PAO6 lubricating oil film in micron clearance is obtained. The results show that the shear velocity of PB450 oil film with thickness of 8.5 渭 m is approximately a typical linear distribution in the direction of film thickness under given test conditions. At the same thickness, the flow velocity distribution of PAO6 oil film is a nonlinear plug flow, and the viscosity of oil film near the interface is significantly lower than that of the middle layer. The deviation of shear velocity of PAO6 increases with the decrease of film thickness at the same sliding velocity. Through comparison and analysis, the experimental results are in good agreement with the relevant data under hydrodynamic lubrication.
【作者單位】： 青島理工大學(xué)機(jī)械工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51605239) 青島市應(yīng)用研究項(xiàng)目(2016193)資助~~
【分類號(hào)】：TH117.2

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