Hitachi, Ltd.

Tomoya Tamura

Kazuo Kobayashi

Takashi Watanabe

Susumu Yamazaki

Masayuki Fujio

Hiroshi Asabuki

Kengo Hasegawa

Hiromoto Ashihara

Eiichi Ito

Yukio Chihara

Hajime Fujita

Kanzi Mizutani

Yuichi Nakatsuhama

Yukio Makuta

Kazuo Yanagiya

A vortex flow blower used as an air source to be incorporated into general industrial machines. The vortex flow blower is characterized in that the shape of the blade in its impeller is three dimensionally formed such that at least the inner portion of the blade can be adapted to the three dimensional internal flow. According to the present invention, the aerodynamic performance can be significantly improved and the size of a vortex flow blower can be reduced. Furthermore, an impeller having three dimensionally shaped blades is manufactured by independently manufacturing the shroud and the blades and coupling them, so that the impeller of a complicated shape can be readily manufactured. Furthermore, since the blade can be made of a thin and light material, the secondary moment of inertia of the impeller can be reduced.

Method of manufacturing an impeller

Vortex flow blower having blades each formed by curved surface

Vortex flow blower having blades each formed by curved surface and

Growing community of inventors

Sakura, Japan

Tomoya Tamura