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. 27, 2001
Filed:
Nov. 05, 1998
Kaoru Sakata, Takasago, JP;
Takeshi Nakamura, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A sealing device in a gas turbine that uses steam for cooling high temperature portions of the gas turbine and then recovers the steam. The sealing device prevents the steam from leaking at a spindle bolt portion of the turbine disc (8). The spindle bolt (1) passes through a seal hole (4) formed in the turbine disc (8). The sealing device is disposed in the seal hole and includes a seal piece (3), having a smaller coefficient of linear expansion relative to the spindle bolt (1), and a seal piece cover (5) for covering the seal piece (3). A pressure hole is bored through the seal piece cover (5) such that high pressure side steam pressure is introduced through the pressure hole (6) and into an inner side of the seal piece cover (5) so that the seal piece (3) is urged into contact with a sheet surface (7) of the seal hole (4).