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表面织构对椭球体-平面接触热弹流润滑的影响
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国家自然科学基金项目(51175275);青岛科技计划项目(12-1-4-4-(2)-JCH).


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    摘要:

    基于椭球体-平面几何和数学模型,分别采用多重网格法和多重网格积分法求解光滑及带有表面织构(正方体微凹坑、圆柱形凹坑)椭球体的压力、膜厚分布及其表面的温度分布, 分析不同滑滚比(1.0~2.0)下2种不同表面织构的最小膜厚和最高温度。结果表明:温度对表面织构的弹流润滑性能影响较大,不可忽略; 2种织构表面的油膜厚度较光滑表面增大,且在圆柱体表面织构的底面半径跟正方体表面织构边长相同时,前者表面所形成的油膜厚度更大,整体温度更小;随着滑滚比的增大,2种织构表面的最小膜厚减小,最高温度增大,其中圆柱体表面织构具有更大的最小膜厚,更低的最高温度。

    Abstract:

    Based on the geometric and mathematical model of ellipsoid-plane contact,the multi-grid,multilevel multi-integration method and sequential column sweeping technique were respectively adopted to calculate the pressure, film and temperature distribution of the smooth surface and the surfaces with textures of cubic and cylindrical micro pit. The minimum film thickness and maximum temperature was analyzed for two kinds of texture surfaces at different slide-roll ratios. Results show that the temperature has greater influence on the elastohydrodynamic lubrication performance. The film thickness of two kinds of texture surfaces is thicker than that of smooth surface,when the cylinder radius and cubic side length is equal,the surface with cylindrical texture has larger film thickness and lower whole temperature. Along with the increasing of slide-roll ratios, the minimum film thickness of two kinds of texture surfaces is decreased and the maximum temperature is increased, and the surface with cylindrical texture has larger minimum film thickness and lower maximum temperature.

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卢宪玖,王优强,王迪迪.表面织构对椭球体-平面接触热弹流润滑的影响[J].润滑与密封,2014,39(12):75-79.
.[J]. Lubrication Engineering,2014,39(12):75-79.

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  • 在线发布日期: 2015-04-21
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