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:
Jul. 21, 2015
Filed:
Nov. 11, 2010
Katsuhisa Kojima, Tokyo, JP;
Yasutoshi Ueda, Tokyo, JP;
Takashi Sonoda, Tokyo, JP;
Masao Terazaki, Tokyo, JP;
Katsuhisa Kojima, Tokyo, JP;
Yasutoshi Ueda, Tokyo, JP;
Takashi Sonoda, Tokyo, JP;
Masao Terazaki, Tokyo, JP;
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Yokohama, JP;
Abstract
This gas turbine includes a turbine cooling structure of cooling a turbine by using cooling air and a filter that reduces dust in the cooling air on an upstream side of the turbine. Furthermore, the gas turbine includes a supply pipe for supplying the cooling air to the filter, a branch pipe that is branched from the supply pipe on an upstream of the filter, and a unit that calculates or estimates a circulation amount of dust in the cooling air. In this gas turbine, at a time of start-up of a turbine, the supply pipe is closed and the branch pipe is opened, and when the circulation amount of dust in the cooling air becomes equal to or less than a predetermined threshold, the supply pipe is opened and the branch pipe is closed.