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:
Feb. 16, 2016
Filed:
Aug. 10, 2010
Toyotaka Yoshida, Tokyo, JP;
Katsuyuki Osako, Tokyo, JP;
Takao Yokoyama, Tokyo, JP;
Motoki Ebisu, Tokyo, JP;
Toyotaka Yoshida, Tokyo, JP;
Katsuyuki Osako, Tokyo, JP;
Takao Yokoyama, Tokyo, JP;
Motoki Ebisu, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
Providing a turbine rotor in which the rotational inertia of the turbine rotor can be reduced without changing the geometry of the blade part, whereas the turbine rotor is provided with the rear side surface so that the stress concentration appearing at the root part regarding the hub part on the rear surface side is constrained in order that the strength and the durability of the turbine rotor can be enhanced. A turbine rotor that comprises a hub partconnected to a rotor shaftand a plurality of blade partsformed around the outer periphery of the hub part, the hub part and the blade parts being integrated into one piece, wherein the diameter of the hub partaround the rotation axis L of the rotor shaftgradually increases along the rotation axis direction toward a rear side surfaceon an end side regarding the rotation axis direction; an annular recessis formed annularly around the rotation axis as a rotation center line, on the side of the rear side surfaceof the hub part; the cross-section of the annular recess whose plane includes the rotation axis is configured with a part of the major arc C of an oval shape or an egg shape, the major arc C being formed so that the oval shape or the egged shape is divided by the major axis b as a symmetrical axis of the oval shape or the egged shape; and, the major axis b is placed in the rear side surface