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:
Jan. 25, 2005
Filed:
May. 14, 2003
Eiji Saito, Hitachi, JP;
Kiyoshi Namura, Tokai, JP;
Yutaka Yamashita, Hitachi, JP;
Masakazu Takasumi, Juou, JP;
Yoshiaki Yamazaki, Hitachi, JP;
Yoshio Shikano, Hitachinaka, JP;
Kazuo Ikeuchi, Hitachi, JP;
Masumi Katayose, Hitachi, JP;
Eiji Saito, Hitachi, JP;
Kiyoshi Namura, Tokai, JP;
Yutaka Yamashita, Hitachi, JP;
Masakazu Takasumi, Juou, JP;
Yoshiaki Yamazaki, Hitachi, JP;
Yoshio Shikano, Hitachinaka, JP;
Kazuo Ikeuchi, Hitachi, JP;
Masumi Katayose, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention relates to a turbine bucket to be provided at the low pressure last stage of a steam turbine and an object of the present invention is to provide a turbine bucket in which the adjacent blades are connected without using a connecting member at a blade intermediate portion. In order to achieve the object of the present invention, a turbine bucket of the present invention is formed in such a manner that the blade sectional configuration is twisted from a blade root portion to a blade tip side, and when assuming two axial directions in a blade section of the bucket on horizontal plane and taking one axial direction as X axis and the other axial direction perpendicular to X axis as Y axis, the blade sections at predetermined heights from the blade root portion of the turbine bucket are formed in a range of ±0.3 mm from respective points defining blade section configurations as shown respectively in chart 1, chart 4, chart 7, chart 10, chart 13, chart 16 and chart 18.