US 6,190,130 B1Granted

Gas turbine moving blade platform

AssigneeMitsubishi Heavy Industries, Ltd.

InventorsIchiro Fukue, Eiji Akita, Kiyoshi Suenaga, Yasuoki Tomita

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Abstract

A gas turbine moving blade platform having a simplified platform cooling structure. A cooling effect of the platform side end portions is increased resulting in uniform cooling of the entire platform. Cooling passages (2, 3) are bored in the platform (1) front portion so as to communicate with a cooling air passage (52) of the moving blade (51) and open at both platform side end surfaces. The openings are closed by inserting covers (2a, 2b) therein. Cooling passages (6, 4) are bored in platform (1) side end portions so as to communicate with the front end cooling passages (2, 3), respectively, and open in the platform rear end surface. A plurality of cooling holes (5) are bored so as to communicate with the cooling passage (4) and open at the platform side end surface. Thus, the entire platform is cooled uniformly and the platform side portions are cooled by the cooling holes (5) so that an effective cooling performance is ensured and also the workability of the cooling lines is enhanced.

Claims4

Dependent claims

A gas turbine moving blade platform comprising:

a first cooling passage provided in said platform on a first side of the moving blade, said first cooling passage communicating at one end with a leading edge passage of the moving blade and opening at the other end in a first side end surface of said platform;
a first cover closing the other end of said first cooling passage;
a second cooling passage provided in said platform on a second side of the moving blade, said second cooling passage communicating at one end with the leading edge passage of the moving blade and opening at the other end in a second side end surface of said platform;
a second cover closing the other end of said second cooling passage;
a third cooling passage provided in said platform, said third cooling passage communicating at one end thereof with said first cooling passage and having another end thereof opening in a rear end surface of said platform;
a fourth cooling passage provided in said platform, said fourth cooling passage communicating at one end thereof with said second cooling passage and having another end thereof opening in the rear end surface of said platform;
and
a plurality of cooling holes formed in the first side end surface of said platform, wherein each of said holes communicates with said third cooling passage which is provided on a dorsal side of the moving blade.

5 more elements

Dependencies are inferred from the claim text.