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本发明阻塞节流交替式无接触转动密封可作为多种回转式气体机械的轴端密封．针对迷宫式密封仅靠节流作用而泄漏多特别是在高压不理想、排齿数少以及对审轴的耐受性差的不足，融汇了两种密封原理，添加了边界层阻流作用，将传统的齿顶节流齿侧迷宫改为长齿侧阻塞节流和齿顶迷宫．可多排齿控、增大曲折度、延长轴向间距，故消除了迷宫密封的几个缺点，显著降低了泄漏量．
The blocking throttling alternating non-contact rotary seal of the present invention can be used as a shaft seal of various rotary gas machines. For the labyrinth seal only by the role of the throttle and more leakage, especially in the high pressure is not ideal, fewer rows of teeth and poor tolerance to the trial axis, the integration of the two sealing principle, add the role of boundary layer flow blocking will The traditional tooth thrill side of the labyrinth changed to the long side of the obstruction throttling and addendum maze. Can be more rows of teeth control, increase the tortuous degree, to extend the axial spacing, it eliminates the labyrinth seal several shortcomings, significantly reducing the amount of leakage.