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高低齿迷宫密封泄漏量实验及计算分析

Keywords: 高低齿迷宫密封,内部流动结构,泄漏量测量,优化结构

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Abstract:

本文通过数值计算模拟了高低齿型迷宫密封的内部流动结构,对比了不同压比和转速下密封性能的变化,同时通过实验验证了模拟结果。实验和计算结果表明,密封的泄漏量随压比的升高而变大,并在一定压比范围具有较好的线性相关性。当转子转速比较低时,转动对泄漏量影响不明显;当转速超过某个临界值的时候,泄漏量会随转速的增加而减少。这个临界值的大小与密封的结构、压比等因素有关。通过对密封内部流场结构的分析,提出了初步的优化方案,其中的核心思想是提高间隙节流的强度和动能耗散的速度。

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