| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine wheel for turbomachinery essentially unrestricted in maximum number of blades disposed to each segment, and remarkably improving overall sealability. SOLUTION: A disk 4 of the turbine wheel 1 has an upstream rib 14a and a downstream rib 14b which extend in an annular direction around a shaft 2 as the center. Each segment 6 attached to the disk is held in an outside diameter direction by the disk by means of an upstream engagement means 16a which constitutes a part of a root part 8 and is cooperated with a complementary upstream engagement means 18a forming an external radial end part of the upstream rib, and a downstream engagement means 18b forming a part of the root part 8 and capable of cooperating with complementary downstream engagement means 18b forming an external radial end part of the downstream rib. The upstream rib and the downstream rib are movable in a direction from an engagement position to a close position which are spaced from each other, or vice versa, and each blade part is assembled on the turbine disk. COPYRIGHT: (C)2005,JPO&NCIPI
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