| Citation: | Chen Yingtao, Liu Hongwei, Sun Dan, et al. Study on the sealing performance of flexible graphite braided packing based on three-dimensional braiding model[J]. Journal of Aerospace Power, 2026, 41（7）：20240190 doi: 10.13224/j.cnki.jasp.20240190
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To study the sealing performance of flexible graphite braided packing, the spatial configuration and motion trajectory of its yarns were analyzed, and a three-dimensional braiding model was established. Compared with traditional non-metal gasket models such as the porous media model, this model not only considered the interaction between yarns but also demonstrated good compressive resilience, helping to better simulate its real working condition. The leakage under different axial loads, medium pressures, and medium temperatures was obtained through numerical simulation. The results indicated that: numerical simulation results were consistent with the experimental results. The leakage was inversely proportional to the axial load. The increase in axial load reduced the leakage channels, leading to a gradual decrease and eventual stabilization of the leakage rate, thereby improving the sealing performance. The leakage was directly proportional to the medium pressure. When the medium pressure was high, the axial load can be appropriately increased to improve the sealing performance. The leakage was directly proportional to the medium temperature. When the medium temperature increased, the leakage increased slightly, and overall, the impact on the leakage was relatively small.
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