【摘要】 相比于传统印染工艺,超临界CO₂印染因能耗低、污染少的优点具有广阔的发展前景。平滑式迷宫密封是超临界CO₂喷染器中的重要部件,其密封性能直接影响到设备的喷染效果。为了提高迷宫密封性能,根据特斯拉阀反向流通阻力大的结构特点,设计了一种全新的仿特斯拉阀迷宫密封结构。使用Fluent软件模拟两种迷宫密封的内部流场,探讨仿特斯拉阀迷宫密封结构的可行性,改变输入口压力,比较两种密封结构的泄露量。结果显示随着压力升高两者泄漏量均逐渐增加,仿特斯拉阀迷宫密封效果优于平滑式迷宫密封,基于特斯拉阀设计的迷宫密封结构具有更好的密封性能。更多还原

【Abstract】 Compared to traditional dyeing processes, supercritical CO₂ dyeing has broad development prospects due to its advantages of low energy consumption and less pollution. The smooth labyrinth seal is an important component in the supercritical CO₂ spray dyer, and its sealing performance directly affects the spraying and dyeing effect of the equipment. In order to improve the labyrinth seal performance, a new labyrinth seal structure mimicking the Tesla valve was designed based on the structural characteristics of the Tesla valve, which has high resistance to backflow.Fluent software was used to simulate the internal flow fields of the two labyrinth seals, exploring the feasibility of the Tesla valve-inspired labyrinth seal structure by varying the inlet pressure and comparing the leakage amounts of the two sealing structures. The results show that as the pressure increases, the leakage amounts of both structures gradually increase, with the Tesla valve-inspired labyrinth seal demonstrating better sealing performance than the smooth labyrinth seal. The labyrinth seal structure designed based on the Tesla valve exhibits superior sealing capabilities.更多还原