Patent Number: 6,254,346

Title: Gas turbine cooling moving blade

Abstract: The present invention relates to a gas turbine cooling moving blade and is applied to a large-sized blade for a high temperature so as to reduce its thickness and increase cooling efficiency and easily process the moving blade. A cavity is formed in the interior of the moving blade from the root portion to a shroud at the tip of the moving blade. Many turbulators are arranged in parallel with each other on an inner wall face of the moving blade. Cooling air from a turbine rotor enters the cavity formed within the moving blade from a cooling air inlet. This cooling air is dispersed and disturbed by the turbulators so that heat transfer is improved. Accordingly, the moving blade is efficiently cooled by the cooling air in comparison with a conventional cooling system having a multiplicity of holes. The cooling air is then discharged out of a cooling air outlet through air cooling holes of the shroud located at the tip of the moving blade. Accordingly, the proportion of the hollow space within the moving blade is increased by the cavity and the moving blade is made light in weight. The moving blade is more easily processed and the cooling efficiency of the moving blade is increased.

Inventors: Fukuno; Hiroki (Takasago, JP), Tomita; Yasuoki (Takasago, JP), Suenaga; Kiyoshi (Takasago, JP)

Assignee: Mitsubishi Heavy Industries, Ltd.

International Classification: F01D 5/18 (20060101); F01D 005/18 ()

Expiration Date: 07/03/2018