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, 2012
Filed:
May. 20, 2009
Shigeru Matsumoto, Yokohama, JP;
Koji Yakushi, Tokyo, JP;
Asako Inomata, Yokohama, JP;
Eiji Nakagawa, Tokyo, JP;
Shigeru Matsumoto, Yokohama, JP;
Koji Yakushi, Tokyo, JP;
Asako Inomata, Yokohama, JP;
Eiji Nakagawa, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention provides a turbine system which can start a turbine, while controlling thermal stress generated in a turbine rotor and an expansion difference, due to thermal expansion, between a casing and the turbine rotor, to be lower than defined values, respectively. The turbine system () according to the present invention includes the turbine () having a casing () and the turbine rotor () rotatably attached to the casing (), and a main steam pipe () connected to an upstream portion of the casing (). A control valve () adapted for controlling a flow rate of steam discharging into the casing () is provided with the main steam pipe (), and a power generator () is coupled with the turbine rotor (). Additionally, a starting control system () is adapted for controlling the control valve (), while obtaining an operational amount of the control valve ().