公开(公告)号：JPH08200005A

公开(公告)日：1996-08-06

申请号：JP26581395

申请日：1995-10-13

Applicant: ABB MANAGEMENT AG

Inventor： UIIRIEN NGUIEN ,  ERI BUIIRANTO

IPC: F01D5/06 ,  F01D5/30

Abstract: PROBLEM TO BE SOLVED: To attach a blade in a blade groove of a rotor and form the blade groove into a satisfactory shape, without damaging the groove bottom of the blade groove and the blade. SOLUTION: A blade 2 of a bladed rotor 1 of an axial-flow turbomachine has a shoulder part 6 between a blade 2a and blade roots 2b fixed in a plurality of annular blade grooves 11. The profile of the cross section of the blade groove is shaped symmetrically with respect to its symmetrical plane by a plurality of radii R1 to R4 which follows sequentially. The each radius closer to the symmetrical plane of the two radii which follow sequentially is larger than the radius which is more remote from the symmetrical plane, and two circular arcs following sequentially from among circular arcs 21 to 24 formed by these radii have a common tangent T at their contact points.