【摘要】 为计算比较直通齿和交错齿迷宫密封内部的流场分布和动力特性,本文建立了两种齿形密封的三维CFD模型,并利用商业软件CFX模拟分析流场的分布规律,计算密封内气体对转子的气流激振力,求解两齿形密封的动特性系数。结果显示:交错齿迷宫密封泄漏量和周向速度均小于直通齿,并且转子上有7齿的交错齿密封的稳定性优于直通齿。更多还原

【Abstract】 To compare the flow field distribution and the dynamic characteristic coefficients of straight teeth and staggered teeth labyrinth seal,in this paper we established 3D CFD models of two kinds tooth shape seal.And we use commercial software CFX observing and analyzing the distribution of flow field,getting air’s flow excitation force on rotor,solving the dynamic characteristic coefficients of the two tooth shape seal.The result shows:not only the staggered labyrinth seal’s circumferential velocity and leakage rate are lower than the straight teeth,but also the stability of staggered labyrinth seal with seven seals at rotor is better than straight teeth.更多还原