Title:
GAS TURBINE AND ITS ROTOR BLADE
Document Type and Number:
Japanese Patent JPH1122404
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To simplify the structure without increasing cooling air quantity to perform an effective cooling, and enhance the thermal efficiency by providing a small hole allowing a cooling air feed port to communicate with a cooling air recovering port through a platform. SOLUTION: Cooling air is partially branched from a cooling air feed port 16 in the branch hole 41 of a platform part 14, and guided to a cooling recovering port 17 by a combining hole 42 through the small holes 43a, 43b of platforms 14, 14a. Most of the heat carried to the platforms 14, 14a from a high-temperature working gas flow by the drive of a gas turbine is radiated to the cooling air carried through the branch hole 41, the small holes 43a, 43b, and the combining hole 42. The other part of the heat is radiated to seal air 37b from the reverse side of the platform 14. Namely, the cooling of the platform 14 is enhanced by the cooling air carried through the small holes 43a, 43b, so that the temperature rise of the platform 14 can be prevented.
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Inventors:
ANZAI SHUNICHI
KITSUKA NOBUAKI
KAWAIKE KAZUHIKO
KITSUKA NOBUAKI
KAWAIKE KAZUHIKO
Application Number:
JP17804497A
Publication Date:
January 26, 1999
Filing Date:
July 03, 1997
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D5/08; F01D5/18; F01D5/30; F02C7/18; (IPC1-7): F01D5/08; F01D5/18; F01D5/30; F02C7/18
Attorney, Agent or Firm:
Ogawa Katsuo