| 摘要 |
PROBLEM TO BE SOLVED: To provide a moving blade holding device and holding method, for preventing the moving blades of a rotary machine from being axially displaced forward or backward. SOLUTION: A circumferential hub slot 16 is formed along the periphery of a machine hub 10. Moving blade holding slots 18 are provided matcheable to the circumferential hub slot when the moving blades are machined-processed and the moving blades are accommodated in an opening 12 having the shape corresponding to the hub. One or more ring segments 22 are fixed to the moving blade holding slot and the circumferential hub slot to prevent the moving blades from being axially displaced. The ring segments are fixed to a matching slot using a key-assembly 30 through a screw part 38 pushed in radially outside by a hook part 34 for accommodating the ring segments, and a nut part 50. A cap 52 can be provided as a redundant auxiliary load path for centrifugal load to be applied to the key. As another process, the key-assemble can be provided in a dovetail of the moving blade. |
