Title:
TURBINE STATIONARY BLADE AND TURBINE MOVING BLADE
Document Type and Number:
Japanese Patent JPH04179802
Kind Code:
A
Abstract:
PURPOSE:To enhance cooling efficiency of a blade so as to improve thermal efficiency by interposing a recovery duct between a duct extending in the radial direction of a blade and a rear end duct formed independently of each other on the front and back sides of the blade. CONSTITUTION:Cooling steam 30a cools a blade while flowing in ducts 38, 41, 44, 45 from an outer diameter side toward an inner diameter side, to meet together under guidance of a cavity 50. The confluent steam is turned into recovery steam 30b under guidance of a recovery duct 40, and cools the blade while flowing in the recovery duct 40 from the inner diameter side toward the outer diameter side, to be recovered by a steam recovery line. An insert 42 is pressed against projecting strip pieces 43 by the effect of a difference between an inner pressure of the inside steam and a static pressure of the steam in the cooling duct 44 on the back side and the cooling duct 45 on the front side. Accordingly, air-tightness among the ducts can be kept. Therefore, it is possible to enhance thermal efficiency of a power plant.
Inventors:
ITO KATSUYASU
ITOU HIROSHIGE
ITOU HIROSHIGE
Application Number:
JP30711090A
Publication Date:
June 26, 1992
Filing Date:
November 15, 1990
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
F01D5/08; F01D5/14; F01D9/02; (IPC1-7): F01D5/08; F01D5/14; F01D9/02
Attorney, Agent or Firm:
Hisano Hatano (1 person outside)