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:
Nov. 02, 2004
Filed:
May. 20, 2003
Satoshi Tanaka, Hyogo, JP;
Yoshiyuki Kita, Hyogo, JP;
Masaaki Yamasaki, Hyogo, JP;
Hiroya Komiyama, Kanagawa, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
This invention provides a clutch engagement detecting apparatus, which can accurately detect the state of engagement of a clutch using a helical spline engagement structure, and a single-shaft combined plant having it, and is constructed as follows: If the difference between the detected value of the rotational speed of a gas turbine and the detected value of the rotational speed of a steam turbine is not more than a detection error by the time a predetermined time elapses after load is charged into the steam turbine, it is determined that the clutch is engaged. If the detected value of the rotational speed of the steam turbine exceeds the detected value of the rotational speed of the gas turbine by a predetermined rotational speed &agr; or more, or if the detected value of the rotational speed of the steam turbine falls short of the detected value of the rotational speed of the gas turbine by a predetermined rotational speed &bgr; or more after detection of clutch engagement, it is determined that the clutch is abnormal. Alternatively, steam turbine rotation pulses are counted for each constant number of gas turbine rotation pulses, and subtraction or addition is done based on the counted value to obtain the relative rotation angle between the steam turbine and the gas turbine, thereby detecting clutch engagement.