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. 06, 2013
Filed:
Feb. 14, 2012
Kenjiro Narita, Hitachinaka, JP;
Haruyuki Yamazaki, Tokai, JP;
Hiroyuki Doi, Tokai, JP;
Kei Kobayashi, Kitaibaraki, JP;
Hajime Toriya, Hitachi, JP;
Kenjiro Narita, Hitachinaka, JP;
Haruyuki Yamazaki, Tokai, JP;
Hiroyuki Doi, Tokai, JP;
Kei Kobayashi, Kitaibaraki, JP;
Hajime Toriya, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A seal structure for a steam turbine is provided, which is capable of suppressing transfer of heat generated by a friction between a rotating portion and a fixed portion to the rotating portion and of suppressing an increase in the temperature of the rotating portion. A labyrinth seal device serves to suppress the amount of steam leaking from a clearance present between each stator blade (fixed portion) of the steam turbine and a rotor (rotating portion). The seal structure for the steam turbine is formed to ensure that permeable spacers made of a permeable metal are provided on the rotor and a seal stationary body and face respective seal fins provided in the labyrinth seal device.