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:
May. 20, 1980
Filed:
May. 30, 1978
Akira Sakai, Tokyo, JP;
Jube Matsumura, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A governing system for use in a sliding-pressure type turbine power plant, in which a target level for a main steam pressure is automatically set in response to a load demand, while two or more regulating valves are controlled according to a valve-positioning signal so as to eliminate a deviation of an actual load from a load demand, whereupon a target level for the main steam pressure is corrected, based on the diviation of the actual opening from the target opening of each regulating valve, whereby the main pressure generated in a boiler is regulated to a corrected target level. This governing system includes a valve driving mechanism functioning such that all regulating valves be opened at a time in a range up to a given opening, and thereafter the regulating valves be opened one after another, commensurate to the magnitude of a control signal, after entering a range beyond the aforenoted given opening.