测量汽轮机转子底部的轴封和隔板汽封的间隙,是一项比较困难的工作。因为叶轮、隔板等排列十分紧凑。用普通的测量工具和手段是难以胜任的。只能采取一些特殊的测量方法,方能达到目的,本文介绍汽封压尺的原理及应用。1 汽封压尺1.1 汽封压尺的结构它是由尺座及测头两个部分组成的。(见图1) a.尺座尺座中间有一个顶紧螺钉,当螺钉顶至隔板槽道底部后,尺座“T”面将紧贴槽道工作孤面。 It is a difficult task to measure the clearance between the shaft seal and the diaphragm seal at the bottom of the steam turbine rotor. Because the impeller, partitions and other arrangements are very compact. With ordinary measurement tools and means is difficult to competent. Only to take some special measurement methods, can achieve the purpose, this article describes the principle and application of the seal pressure gauge. 1 seal pressure ruler 1.1 seal pressure ruler structure It is composed of two parts of the scale seat and the probe. (See Figure 1) a. There is a tightening screw in the middle of the pedestal. When the screw reaches the bottom of the channel, the “T” side of the pedestal will be close to the working face of the channel.