The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2001
Filed:
Dec. 23, 1998
Yasuoki Tomita, Takasago, JP;
Hiroki Fukuno, Takasago, JP;
Sunao Aoki, Takasago, JP;
Kiyoshi Suenaga, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
In gas turbine cooled moving blade, a cooling air passage is made shortest and temperature elevation and pressure drop of the cooling air are suppressed. The cooling air passage (,) is bored in a turbine cylinder wall (,) located below a first stage stationary blade (,). The cooling air passage (,) communicates at one end (,) with a turbine cylinder and at the other end (,) with a space (,) between the stationary blade and the moving blade. The passage (,) is directed to an air inflow hole (,) provided in a shank portion (,) of a lower portion of a platform (,) of the moving blade (,). Cooling air is jetted from the cooling air passage (,) toward the air inflow hole (,) so as to flow into the shank portion (,) and then into the moving blade (,) for cooling thereof. An axis (,) of the cooling air passage (,) is directed so as to deviate in a rotational circumferential direction by an angle determined by the velocity of the cooling air jetted from the cooling air passage (,) and the rotational velocity of the moving blade (,) from position of the air inflow hole when the moving blade (,) stands still in row with the stationary blade (,) in rotor axial direction. Thus, the cooling air can be jetted in an optimal direction with the shortest distance, and the temperature elevation and pressure drop of the cooling air can be suppressed to minimum.