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:
Oct. 21, 2014
Filed:
Jul. 13, 2011
Kenjiro Narita, Hitachinaka, JP;
Haruyuki Yamazaki, Tokai, JP;
Takeshi Kudo, Hitachinaka, JP;
Kenichi Murata, Hitachi, JP;
Kenjiro Narita, Hitachinaka, JP;
Haruyuki Yamazaki, Tokai, JP;
Takeshi Kudo, Hitachinaka, JP;
Kenichi Murata, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A sealing structure in which free-cutting spacers on a sealing base plate and sealing fins on a rotor are opposed to each other is provided. The sealing base plate is disposed so as to be movable in an axial direction of the rotor. When a steam turbine increases in load, a pressure head moves in an axial steam-pressure loading direction of the rotor and the sealing base plate connected to the pressure head moves in the axial steam-pressure loading direction. Since the free-cutting spacers at positions opposed to those of the sealing fins existing after the movement of the sealing base plate are maintained in a non-contact state, clearances between the sealing fins and the free-cutting spacers are dimensionally minimized.