Title:
FIXATION OF MOVABLE BLADE OF AXIAL FLOW ROTARY MACHINE
Document Type and Number:
Japanese Patent JPS6469702
Kind Code:
A
Abstract:
PURPOSE:To facilitate the mounting and demounting of a movable blade by forming an insertion hole into the disc groove part of a rotor disc and forming an insertion hole corresponding to the blade root part of the movable blade and fitting the engaging members energized by a spring member made of shape memory alloy into these insertion holes. CONSTITUTION:In the constitution in which a movable blade 1 is assembled by fitting the blade root part 2 of the movable blade 1 into the disc groove part 4 of a rotor disc 3, an engaging member insertion hole 9 and a blade root part groove 12 which communicates to the insertion hole 9 from the edge surface of the blade root part 2 are formed at the blade root part 2 of the movable blade 1. Further, an engaging member inserting hole 8 is formed at the disc groove part 4, and an engagement part 10 is fitted through a spring member 11 made of shape memory alloy into said engaging member insertion hole 8. The spring member 11 restores the shape (contraction form) before deformation when heated over a certain temperature, and in this state, the movable blade 1 is mounted and demounted, and in the ordinary state, the engaging member 10 is extended between the insertion holes 8 and 9 by the extension deformation of the spring member 11, and the slip-off of the movable blade 1 is prevented.
Inventors:
TAKAZUMI MASAKAZU
NAMURA KIYOSHI
NAMURA KIYOSHI
Application Number:
JP22393887A
Publication Date:
March 15, 1989
Filing Date:
September 09, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D5/30; (IPC1-7): F01D5/30
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)