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Surface texturing effect comparative analysis in the hydrodynamic journal bearings

机译:流体动压轴承的表面纹理效果比较分析

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摘要

The journal bearing is a complex system with high film convergence and with cavitation hydrodynamic phenomena. The surface texturation influence study on journal bearing performances requires unavoidably experimental investigations followed by a numerical modelling of the problem. This work consists in modellization and understanding of the journal bearing characteristics in both cases of presence or absence of textures onto the bearing surface. The finite difference method is used as numerical approach in the analysis. The textured bearing performance enhancement passes essentially by an improvement of a minimum film thickness, a maximum pressure and a friction torque through an appropriate surface texture geometry and appropriate texture distribution on the contact surface. It is found that the simulations results are in good concordance with litteratures. The texture area position on the bearing surface is the primary endpoint for journal bearing performance enhancement. The best design of textured area depends strongly on the geometrical parameters and the journal bearing operating conditions.
机译:轴颈轴承是一个复杂的系统,具有很高的薄膜会聚度和空化流体动力学现象。表面纹理对轴颈轴承性能的影响研究不可避免地需要进行实验研究,然后对该问题进行数值建模。这项工作包括对轴承表面上是否存在纹理的情况进行建模和对轴颈轴承特性的理解。分析中使用有限差分法作为数值方法。通过适当的表面纹理几何形状和在接触表面上的适当纹理分布,最小化膜厚度,最大压力和摩擦扭矩的改善基本上是通过提高纹理化轴承性能。发现仿真结果与文献资料非常吻合。轴承表面上的纹理区域位置是提高轴颈轴承性能的主要终点。纹理区域的最佳设计在很大程度上取决于几何参数和轴颈轴承的工作条件。

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