| 摘要 |
PURPOSE:To prevent thermal deformation by fitting a heat insulation material to the outside of a horizontal flange part connecting the upper half casing and the lower half one. CONSTITUTION:A heat insulation material 5 is fitted to the outside of a horizontal flange part 1a connecting the upper half casing 1 and the lower half casing 1. Since the horizontal flange part 1a of the casing 1 is greater in mass and wider in surface area than a shell part 1b of the casing 1, the heat diffusion from the flange part 1a to the outside is greater than that from the shell part 1b. However, a heat insulation material 5 enables us to keep the metal temperature at the horizontal part 1a at the same temperature as that at the shell part 1b of the casing 1. Thus, the thermal deformation of the casing 1 can be prevented. |
