| 摘要 |
PURPOSE: An axial direction displacement of a bush is surely prevented at the time of turbine operation so as to use a bush holder at a high centrifugal force field by forming a counter boring in a penetrating opening port of a wheel and a space for taking a steam supplying pipe and a steam return pipe into, and arranging an annular member therein. CONSTITUTION: In a gas turbine rotor R, a plurality of wheels carries a plurality of buckets or moving blades, a plurality of spacers which are alternately disposed matches with a plurality of static blades or nozzles, and each wheel and each spacer (28) are mutually fastened by a plurality of bolts. In this case, a thin wall sleeve is disposed in a return pipe (42) inserted into a penetrating opening port (56) of the spacer (28), a heaving land is disposed on a plurality of axial direction separating positions along the thin wall sleeve, and they are engaged with a bush (48). A holding ring (62) is disposed for obstructing backward displacement of the bush (48), and is disposed in an annular groove (64) in a counter boring (54) formed just after the bush (48).
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