Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1995-10-13
1996-09-24
Kwon, John T.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
415 552, F04D 500
Patent
active
055584900
ABSTRACT:
In a liquid pump of the side channel type, particularly an electric fuel pump, comprising a suction cover (11) having an inlet aperture (12), an intermediate casing (13) having an outlet aperture (14), and a pump impeller (15) enclosed therebetween, and also comprising concentric side channels (21, 22) which are formed in mutually oppositely situated surfaces (111, 131) of the suction cover (11) and intermediate casing (13) and into which lead an inlet opening (12) and an outlet opening (14) respectively, the geometry of the outlet opening (14) is selected, for the purpose of reducing noise and achieving greater smoothness of running, such that its aperture wall (141) bounding the end of the side channel (22) in the intermediate casing (13) extends outward with a concave curvature, at least in the side channel region, from the inner surface (131) of the intermediate casing (13) onward, and that on the other hand the geometry of the end of the side channel in the suction cover (11) has a configuration such that the side channel (21) is given a steeply rising end flank (211).
REFERENCES:
patent: 5192184 (1993-03-01), Nobuo et al.
patent: 5310308 (1994-05-01), Yu et al.
patent: 5336045 (1994-08-01), Koyama et al.
patent: 5364238 (1994-11-01), Yu
patent: 5391062 (1995-02-01), Yoshioka
patent: 5464319 (1995-11-01), Liskow
patent: 5498124 (1996-03-01), Ito et al.
Dobler Klaus
Huebel Michael
Nguyen-Schaefer Thanh-Hung
Kwon John T.
Robert & Bosch GmbH
Striker Michael J.
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