Abstract The discrete surface textures, including grooves, dimples and convexes, have been adopted in gas face seals and gas bearings to enhance load-carrying capacity and film stiffness for decades. A novel geometric model with superposed grooves is developed to characterize different discrete surface texture patterns for gas face seals. Comparative studies on steady-state and dynamic performance of gas face seals with different surface textures characterized by the new proposed geometric model are carried out at different working conditions numerically and experimentally. A novel design on surface textures for better trade-off between good sealing performance and possible excellent wear resistant capability is conducted. The results show that convex surface and pump-in groove surface outperform the other textured surfaces for the maximum film stiffness under the condition of static pressure and high-speed, respectively. The combined groove-dimple texture surface with upper pump-in groove and lower dimple has an excellent combination of large film stiffness, good film stability and wear resistant capability compared to the other texture patterns.

中文翻译：

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基于叠加凹槽模型的气体面密封离散表面纹理的新设计

摘要 数十年来，气体面密封和气体轴承采用离散的表面纹理，包括凹槽、凹坑和凸起，以提高承载能力和薄膜刚度。开发了具有叠加凹槽的新型几何模型来表征气面密封的不同离散表面纹理图案。以新提出的几何模型为特征的具有不同表面纹理的气体端面密封的稳态和动态性能在不同工作条件下进行了数值和实验的比较研究。进行了一种新颖的表面纹理设计，以在良好的密封性能和可能的出色耐磨能力之间取得更好的平衡。结果表明，在静压和高速条件下，凸面和泵入槽面的最大薄膜刚度优于其他纹理表面。与其他纹理图案相比，具有上泵入凹槽和下凹痕的组合凹槽-凹坑纹理表面具有大膜刚度，良好的膜稳定性和耐磨能力的优异组合。