迷宫式汽封形成的一系列节流,限制了蒸汽沿汽机轴的泄漏.使泄漏为最小的汽封效果,在很大程度上取决于汽封齿与转子之间所保持的径向间隙值.汽机设计中的一个任务就是给汽封提供一个尽可能小而又无摩擦危险的间隙值. A series of throttling of the labyrinth seal limits the steam leakage along the shaft of the turbine. The sealing effect that minimizes leakage depends to a large extent on the radial clearance that is maintained between the seal teeth and the rotor One of the tasks in turbine design is to provide the seal with a clearance that is as small as possible without the risk of friction.