应用Fluent软件计算迷宫密封间隙宽度和空腔深度以及直通式迷宫密封和错列式迷宫密封对迷宫密封流场和泄漏量的影响。计算结果与分析表明,间隙宽度对泄漏量的影响体现在通过改变空腔进出口面积来改变泄漏量。所以泄漏量随间隙宽度呈线性变化。在实际运用中,在保证安全的情况下尽量减小间隙宽度;在一定条件下,空腔深度越大,紊流程度下降,泄漏量越大;错列式迷宫密封的泄漏量要明显小于直通式迷宫密封。 Fluent software was used to calculate the labyrinthine seal gap width and cavity depth, as well as the effect of the straight labyrinth seal and staggered labyrinth seal on the labyrinth seal flow field and leakage. The calculation results and analysis show that the effect of gap width on the leakage is reflected in the change of the leakage area by changing the cavity inlet and outlet area. So the amount of leakage varies linearly with the gap width. In practical application, the gap width is minimized under the condition of ensuring safety. Under certain conditions, the greater the cavity depth, the lower the degree of turbulence and the larger the leakage. The leakage of staggered labyrinth seal is obviously smaller than that of straight-through Labyrinth seal.