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. 03, 2018
Filed:
Sep. 12, 2012
Ichiro Miyoshi, Yokohama, JP;
Shinichi Higuchi, Yokohama, JP;
Masami Noda, Yokohama, JP;
Mitsubishi Hitachi Power Systems, Ltd., Yokohama, JP;
Abstract
The object of the invention is to suppress development of a secondary current whirl in the vicinity of a rotor blade front edge of a gas turbine even when a cooling refrigerant is mixed in from the front edge of an end wall section of the rotor blade. In a gas turbine rotor bladeincluding a wing shape sectionformed of a negative pressure surfaceextending from a front edgeto a rear edge, a pressure surfaceopposing the negative pressure surfaceand extending from the front edgeto the rear edge, and a tip surfacesurrounded by the top end of the negative pressure surfaceand the top end of the pressure surface, and an end wall sectionconnected to the bottom end of the negative pressure surfaceand the bottom end of the pressure surface, the rotor blade has a convex shape in positions constituting the negative pressure surfaceside and the front edgeside of the end wall section, and the rotor blade has a concave shape in positions constituting the pressure surfaceside and the front edgeside of the end wall section