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:
Aug. 14, 2001
Filed:
Oct. 28, 1999
Ryotaro Magoshi, Takasago, JP;
Takashi Nakano, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A cooling architecture for flanges of a steam turbine casing, which effectively cools the flanges coupled by bolts to prevent the leakage of the steam caused by a decrease of the fastening force of the bolts. An upper casing,and a lower casing,are joined together at flanges,and,which are fastened and secured by bolts to hermetically seal a steam turbine. Pipes,are secured so as to be contacted to the peripheral of the flanges,and,, and a side heat insulator,is fitted thereto from the outer side. Each pipe,is arranged corresponding to each bolt, or a plurality of pipes are arranged corresponding to each bolt,. The flanges,and,are heated by the internal high-temperature steam, the ambient air,is introduced into the pipe,from the lower end thereof due to the natural convection thereby to cool the flanges,and the bolts,. Accordingly, a decrease of the fastening force of the bolts, and steam leakage, hardly occur.