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:
Sep. 04, 2018
Filed:
Dec. 16, 2015
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, Hyogo, JP;
Ryozo Tanaka, Kakogawa, JP;
Ryoji Tamai, Akashi, JP;
Toshiyuki Yamamoto, Kakamigahara, JP;
Yoshichika Sato, Kakogawa, JP;
Yoshinobu Sakano, Akashi, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe-shi, Hyogo, JP;
Abstract
A rotating body includes a rotating body core, and a plurality of blades provided at an outer or inner circumference of the rotating body core at equal intervals in a circumferential direction, and connected circumferentially via an annular connection portion provided separately from the rotating body core. A resonance frequency under a two nodal diameter number mode of the rotating body is lower than or equal to a rotational secondary harmonic frequency with respect to a rated rotation speed. Where Nrepresents an order of a maximum mistuned component among order components of circumferential distribution of mass, rigidity or natural frequency of the blades, arrangement of the blades satisfies N≥5, and has order components each having ratio less than 1/2, in which the ratio is obtained by dividing the order component by the magnitude of the component of the order N.