Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Cross flow runner
Patent
1998-09-29
2000-07-11
Verdier, Christopher
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Cross flow runner
415119, F04D 1704
Patent
active
060863242
ABSTRACT:
A cross flow having a volute is disclosed which is less noisy during its operation. A volute-portion starting radius which is the length of a segment O-F.sub.1 at a volute-portion starting point F.sub.1 is R.sub.1 ; a maximum volute radius which is the length of a segment O-F.sub.2 at the outlet portion starting point F.sub.2 is R.sub.M ; a maximum volute angle which is an angle formed by the segment O-F.sub.2 and O-F.sub.1 is .varies.M; a point on the volute portion having a distance to the center O of the rotating shaft is R.sub.J =(R.sub.1 +R.sub.M)/2; an angle .varies..sub.J is formed by a segment connecting that point and the center 0 of the rotating shaft; the segment O-F.sub.1 is .varies..sub.M /2 (=F.sub.1 -O-F.sub.J); a volute portion of a scroll casing is formed into a circular arc such that R.sub.1 <R.sub.J <R.sub.M, and the circular arc passes through the points F.sub.1, F.sub.J, and F.sub.2.
REFERENCES:
patent: 3695775 (1972-10-01), Zenkner
patent: 4014625 (1977-03-01), Yamamoto
patent: 5094586 (1992-03-01), Takada et al.
patent: 5564495 (1996-10-01), Yoshihashi et al.
patent: 5673747 (1997-10-01), Kousaka et al.
patent: 5943878 (1999-08-01), Smiley, III et al.
Chiguchi Satoshi
Ikeda Takashi
Ohashi Katsumi
Suzuki Sou
Yoshihashi Makoto
Mitsubishi Denki & Kabushiki Kaisha
Verdier Christopher
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