当汽轮机在启动加热、停机冷却过程中,或在运行中工况变化时,汽缸和转子会产生热膨胀或冷却收缩,由于转子的受热表面积比汽缸大,且转子的质量比相对应的汽缸小,蒸汽对转子表面的放热系数较大,因此在相同的条件 When the turbine starts heating, stop cooling process, or operating conditions change, the cylinder and rotor will produce thermal expansion or cooling contraction, due to the rotor heat surface area than the cylinder, and the quality of the rotor than the corresponding cylinder is small, Steam has a large exothermic coefficient on the rotor surface and therefore under the same conditions