Axial-flow impeller for mixing liquids

Details Axial-flow impeller for mixing liquids Axial-flow impeller for mixing liquids

1996-10-17

1998-09-29

Verdier, Christopher

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416237, 416DIG5, 366270, 3663303, 3663305, F04D 2938

Patent

active

058138374

ABSTRACT:
An axial-flow impeller having a maximum blade width less than 20% of the impeller diameter, the pitch angle at the radial position 0.6 is 12.degree.-22.degree., the width at the tip end portion of the blade is 12-75% of the width at the radial position 0.6, the pitch angle at the tip end portion of the blade is 5.degree.-10.degree. smaller than the pitch angle at the radial position 0.6, the width at the root of the blade is 40% or more of the width at the radial position 0.6, and the pitch angle at the root of the blade is 25.degree.-50.degree.. An axial-flow impeller having a maximum width of the blade 20% or more of the impeller diameter, the radial position of the maximum width portion is 0.4-0.8, the pitch angle of the maximum width portion is 12.degree.-22.degree., the width at the tip end portion of the blade is 12-75% of the maximum width, and the pitch angle at the tip end portion of the blade is 5.degree.-10.degree. smaller than the pitch angle at the maximum width portion, the width at the root of the blade is 40-100% of the maximum width, and the pitch angle at the root of the blade is 25.degree.-50.degree..

REFERENCES:
patent: 4222710 (1980-09-01), Katagiri et al.
patent: 4468130 (1984-08-01), Weetman
patent: 4569131 (1986-02-01), Gray, III
patent: 5052892 (1991-10-01), Fasano
S. Winardi and Y. Nagase, "Unstable Phenomenon of Flow in a Mixing Vessel With A Marine Propeller", Journal of Chemical Engineering of Japan; vol. 24, No. 2, pp. 243-249 (Apr. 1991).

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