大功率汽轮机的排汽缸,一般都包含有较长尺寸的末级叶片。在启动过程中或在空负荷额定转速的状态下,排汽部分经常会出现较高的温度,致使转动部件、静子部件发生过大的热膨胀和热变形,给正常运行带来不少麻烦,甚至发生危险事故。因此,在这 High-power steam turbine exhaust cylinder, generally include a longer size of the last stage blades. During the starting process or under the condition of no-load rated speed, the exhaust part often has a higher temperature, causing excessive thermal expansion and thermal deformation of the rotating parts and the stator parts, causing a lot of trouble for normal operation, and even Dangerous accident occurred. So here