Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Patent
1977-05-10
1980-06-17
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
416223B, 415213B, F04D 2924
Patent
active
042081696
ABSTRACT:
A radial or semiaxial impeller for centrifugal pumps has an annulus of vanes whose inlet edges are disposed at the periphery of a circle and are bounded by convex transition surfaces having small radii of curvature. The inner portions of the suction sides of vanes are bounded by flat or slightly curved surfaces which merge gradually into concave surfaces bounding the outer portions of the respective suction sides. The length of each flat or slightly curved surface is between 3 millimeters and the vane pitch. The ratio of the radii of curvature of transition surfaces at the inlet edges of the vanes to the vane pitch is between 0.0035 and 0.04 and/or the ratio of these radii to the average thickness of the inlet portion of a conventional vane is between 0.04 and 0.50. Such construction of the vanes reduces the likelihood of excessive erosion as a result of cavitation.
REFERENCES:
patent: 978753 (1910-12-01), Hurst
patent: 1755321 (1930-04-01), Hendrickson
patent: 2888244 (1959-05-01), Pekarek
patent: 2987806 (1961-06-01), Pekarek
patent: 3564689 (1971-02-01), Hirtenlechner
patent: 3751179 (1973-08-01), Wassmann
patent: 3788765 (1974-01-01), Rusak
patent: 3904308 (1975-09-01), Ribaud
patent: 4010530 (1977-03-01), Delgrosso et al.
Becker Karl-Heinz
Diler Engin
Hergt Peter
Knopfel Hans-Dieter
Nicklas Alexander
Klein, Schanzlin & Becker Aktiengesellschaft
Kontler Peter K.
Powell Jr. Everette A.
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