| 摘要 |
PURPOSE:To reduce production of thermal stress and thermal deformation in the captioned casing structure by dividing said casing of ultra-high temperature and ultra-high pressure into a higher temperature part and a lower temperature part, and constructing the casing of the higher temperature part as a double structure interiorly of the casing while constructing it as a multiple vehicle room structure in part. CONSTITUTION:The captioned casing structure has a casing 8 composed of a high temperature side casing 8a adapted to fix a step along which a high temperature operation fluid flows, to the side of the circumference of the structure and enclosing the step so yielded, and a low temperature side casing 8b for fixing a step through which low temperature operation fluid flows, to the side of the circumference of the structure and enclosing the step so yielded. In addition, a multiple vehicle room structure is formed in part by bringing the high temperature side casing 8a as a whole onto the side of an inner periphery of the low temperature side casting 8b and enclosing it, whereby a buffer zone is assured for reducing a temperature difference between both the casings. Moreover, an annular fluid path 24 elongated axially is formed by making use of a space surrounded by the inner wall side of the low temperature side casing 8b and the outer wall side of the high temperature side casing 8a, and one end of the fluid path 24 is opened to a flow path of the operation fluid within the step described above while the other end is communicated with part of a leakage sealing part. |
