Metal working – Method of mechanical manufacture – Impeller making
Patent
1994-11-30
1997-12-16
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2988922, B23P 1500
Patent
active
056971524
ABSTRACT:
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.
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Transaction of Japan Machinery Society, vol. 45, Aug., 1979, pp. 1109-1116 Hitachi Vortex Blowers, G Series (no date).
Partial Translation of "Transaction of Japan" Machinery Society, vol. 45, (Aug. 1979, pp. 1108-1116) (p. 1112, left col., line 4-13).
Asabuki Hiroshi
Ashihara Hiromoto
Chihara Yukio
Fujio Masayuki
Fujita Hajime
Cuda Irene
Hitachi , Ltd.
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