Title:
ROTOR COOLING DEVICE FOR AXIAL FLOW TURBINE
Document Type and Number:
Japanese Patent JPS59155503
Kind Code:
A
Abstract:
PURPOSE:To effectively cool a disc and a rotor without impairing the capability and realiability of turbine, by arranging a space defined by the rotor and a first- stage blade disc such that its surface having a blade embedded therein is provided with a feed passage for the collision of cooling fluid thereon. CONSTITUTION:A high temperature and a high pressure fluid introduced through a fluid inlet 8 is converted into a mechanical energy that gives a rotor 1 a rotating force during its passage through a first-stage nozzle 4 and a first-stage blade 3. The fluid, after its passage through the first-stage, further flows into a second stage nozzle 7 for giving the rotor 1 a rotating force in the same manner. A predetermined number of vent holes 11 is defined inside the innerring 10 of first- stage nozzle 4 in such manner that vent holes open oppositely to the inner surface of blade embedded portion 2a of disc 2. A labyrinth packing 12 is provided at a clearance between the inner ring 10 of first-stage nozzle and the blade embedded portion 2a. A through hole 13 is defined through the rot area of disc 2.
Inventors:
KOBAYASHI TADASHI
Application Number:
JP2862883A
Publication Date:
September 04, 1984
Filing Date:
February 24, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
F01D5/08; F01D9/02; (IPC1-7): F01D9/02
Attorney, Agent or Firm:
Yoshiaki Inomata