| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine rotor for shortening the total length of a fastening bolt. SOLUTION: This turbine rotor has a rotor member 5 with a fixing part having the fixing part 13 composed of a fitting recessed part 11 and an inner peripheral screw part 12 adjacent to the fitting recessed part, the fastening bolt 2 having on one end a diametrally expansive part 4 fitted to the fitting recessed part 11 of the rotor member 5 with the fixing part and having a male screw part 17 on the other end, a restricting nut 1 having an outer peripheral screw part 18 arranged in an outer peripheral part and a central hole 19 arranged in a central part, threadedly engaging the outer peripheral screw part 18 with the inner peripheral screw part 12 of the rotor member 5 with the fixing part by inserting the fastening bolt 2 into the central hole 19 and restricting the diametrally expansive part 4 of the fastening bolt 2 in the fitting recessed part 11, rotor members 6 to 8 with a through-hole having the through-hole 9 for inserting the fastening bolt 2 and stacked on the rotor member 5 with the fixing part by inserting the fastening bolt 2 into the through-hole 9, and a fastening nut 3 for fastening the rotor members 6 to 8 with the through-hole to the rotor member 5 with the fixing part by threadedly engaging with the male screw part 17 of the fastening bolt 2. COPYRIGHT: (C)2006,JPO&NCIPI
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