| Citation: | WANG S P，DING X X，LI N，et al. Orientation effect on sealing characteristics of rectangular micro-textured floating ring gas film[J]. Journal of Beijing University of Aeronautics and Astronautics，2025，51（3）：845-856 （in Chinese） doi: 10.13700/j.bh.1001-5965.2023.0125
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To investigate the orientation effect of micro-texture on the sealing performance parameters of the floating ring gas film, a rectangular micro-textured hole was selected as the study object. A theoretical analysis model of textured hydrodynamic lubrication control was developed based on gas lubrication theory, and the finite difference method was used to solve the model. The gas film pressure distribution in the sealing gap was obtained. With rotational speed, pressure, eccentricity, and texture depth as independent variables, this study primarily investigated the influence of texture direction angle on sealing performance parameters. The results indicate that the sealing uplift of the micro-textured floating ring increases with rotational speed, pressure, and eccentricity, while increasing micro-textured hole depth results in a decrease in the uplift. Furthermore, the leakage rate increases as rotational speed, pressure, eccentricity, and texture depth increase. However, an increase in rotational speed has little effect on the leakage rate value. The gas film friction also increases with the increase in rotational speed, pressure, and eccentricity and decreases as the texture depth improves. Rectangular micro-texture plays a crucial role in improving the sealing performance parameters. The rational selection of micro-texture direction angle can effectively enhance the sealing performance of the floating ring gas film. These study outcomes provide a novel idea for enhancing the sealing performance of the textured surface floating ring.
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