汽轮机在启动与停机过程中 ,由于传热温差的存在 ,在汽缸壁内及上下汽缸间会产生热应力 ,以至在严重时出现热变形和热膨胀等现象 ,汽轮机组单机功率的增大使这个问题日益受到重视。该文对汽轮机在启动、停机过程中汽缸壁和上下汽缸的传热过程分别进行了分析 ,建立了非稳态传热模型 ,并进行了数值计算 ,得到了汽缸温度场在多种条件下的变化情况 ,并考虑了散热的存在 ,对经典的温差计算式进行了修正。图6参 5 Turbine start-up and shutdown process, due to the existence of heat transfer temperature, the cylinder wall and the upper and lower cylinder will produce thermal stress, even in severe cases of thermal deformation and thermal expansion phenomenon, the steam turbine unit power increased day by day Received attention. This paper analyzes the heat transfer process of the cylinder wall and the upper and lower cylinders of the steam turbine during start-up and shut-down respectively. The unsteady heat transfer model is established and the numerical calculation is carried out. The temperature field of the cylinder under various conditions Changes and taking into account the existence of heat, the classic temperature difference formula was amended. Figure 6 reference 5