| 摘要 |
PROBLEM TO BE SOLVED: To save a cost and an assembling time by constituting a bursting protecting ring arranged on the radial direction outer side of a rotary impeller as a wall constitution part extending to a radial direction, which is integrated with the gas inlet side wall of a gas outlet casing, and connecting to the gas inlet casing through the extending member of an axial direction. SOLUTION: The wall 5 of the gas inlet side of a gas outlet casing 2 comprises the extending member 6 of an axial direction connected to a gas inlet casing 1, a gas outlet pipe piece 7 extending to a radial direction, and a bursting protecting ring 8, and the extending member 6 and the gas outlet pipe piece 7 are connected to each other through the ring 8. A turbine disk plate 10 held by an axis 9 is arranged in a turbine casing 3, and it is restricted by a cover ring 12 as a defuser fixed to the ring 8 through a flange 13 outward. The ring 8 is formed having the length 17 of an axial direction or the height 18 of a radial direction larger than the width or the height of an impeller 11.
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