就一种非接触式气体端面密封进行了低速条件下的试验研究。试验表明，在低速下端面几何参数对密封性能有较大的影响。初步设计出了在低速条件下能够实现动、静压相结合的合理的密封结构形式。该密封气膜稳定，泄漏量小，摩擦系数低。同时，总结出了一些实现端面非接触稳定运转的必要条件。此项研究对于实现非接触气体端面密封的国产化及其应用具有一定的实用价值。 A non-contact gas face seal was tested under low-speed conditions. Experiments show that the geometrical parameters of the end face have a great influence on the sealing performance at low speed. The design of a reasonable seal structure that can combine dynamic and static pressure under low speed condition is preliminarily designed. The sealed gas film is stable, the amount of leakage is small, the friction coefficient is low. At the same time, summed up some of the necessary conditions to achieve stable non-contact end face. This study has certain practical value for the localization of non-contact gas end seals and their applications.