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:
Apr. 05, 2022
Filed:
Sep. 12, 2018
Mitsubishi Hitachi Power Systems, Ltd., Kanagawa, JP;
Takaharu Hiroe, Tokyo, JP;
Satoshi Hada, Yokohama, JP;
Kazunari Ide, Tokyo, JP;
Koki Tateishi, Tokyo, JP;
Ryuji Takenaka, Yokohama, JP;
Koshiro Fukumoto, Yokohama, JP;
Shinichi Yoshioka, Yokohama, JP;
MITSUBISHI POWER, LTD., Kanagawa, JP;
Abstract
A control device is configured to control a temperature of a shaft seal portion around a rotating shaft of a rotating machine by adjusting an amount of cooling air to be supplied to the shaft seal portion. The control device is configured to calculate a sensitivity indicated using the temperature of the shaft seal portion with respect to a flow rate of the cooling air supplied to the shaft seal portion and control the flow rate of the cooling air so that the sensitivity has a predetermined target value based on the sensitivity which has been calculated. When the sensitivity is calculated, the flow rate is varied in a predetermined range having a certain flow rate as a center. The sensitivity is calculated from variation in the temperature of the shaft seal portion with respect to variation in the flow rate.