基于JFO理论的表面凹槽平行轴承间的润滑机制研究

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目前表面纹理的润滑机制研究大多采用经典Reynolds方程进行数值分析，忽略了气穴的影响。以一阶Reyn―olds方程为控制方程，将基于Vijayaraghavan―Keith算法的JFO气穴模型用于探讨表面凹槽纹理对无限长平行轴承的影响，分析凹槽的分布形式和气穴压力值对其承载力的影响。结果表明：在润滑剂、滑动速度和最小膜厚保持不变的前提下，影响润滑性能的因素主要有气穴压力、凹槽数量和纹理的布局方式；当气穴发生时，Vijayaraghavan-Keith算法的预测结果较经典Reynolds解更为准确；Vijayaraghavan―Keith气穴算法对凹槽深度的变化并不敏感。 The classical Reynolds boundary condition is mostly applied to the numerical study of the surface texturing effect at present, but it ignores the effect of cavitation. The effect of grooved surface with infinite width in parallel bearings was discussed by the JFO cavitaion model based on the Vijayaraghavan-Keith algorithm, and a 1 D Reynolds equation was used to analyze the influence of different groove patterns and cavitation pressures on the load-carrying capacity. The results show that the main factors influencing lubrication performance are cavitation pressure, groove numbers and distribution pat-tern under the condition of a fixed lubrication, speed and minimum film thickness. When there is cavitation in the experi- ments, Vijayaraghavan-Keith algorithm predicts more accurately than classical Reynolds algorithm, but it is not sensitive to the change of groove depth.