Abstract Thermal distortion characteristics of spiral groove gas face seals are investigated for cases of high temperature. The influence of ambient temperature and temperature difference on the thermal distortion and the sealing performance is analyzed with consideration of gas thermoviscosity effect. It is found that, the thermal distortion makes the opening force decrease slightly with the increasing ambient temperature, while the thermoviscosity effect causes the leakage rate decrease obviously. Temperature difference between the inner and outer diameters plays a more important role in thermal distortion of the seal face, which results in a sharp divergence distortion accompanying with decrease of the opening force and increase of the leakage rate. This means a large temperature difference may significantly reduce the sealing performance.

中文翻译：

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螺旋槽气面密封高温热变形特性

摘要 研究了螺旋槽气面密封在高温情况下的热变形特性。考虑气体热粘滞效应，分析了环境温度和温差对热变形和密封性能的影响。研究发现，随着环境温度的升高，热变形使开启力略有下降，而热粘滞效应导致泄漏率明显下降。内、外径温差对密封面的热变形起着更重要的作用，随着开启力的降低和泄漏率的增加，会导致急剧的发散变形。这意味着较大的温差可能会显着降低密封性能。