Pump for shear sensitive fluids
OwnerAndrew L. Abrams, Christopher M. Gayloinventors
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Abstract
A centrifugal pump for shear sensitive fluids includes a pump housing defining an interior volume. An impeller comprising at least two vanes is rotatably mounted in the housing. The impeller vanes, which preferably are airfoil-shaped, are spaced from the interior housing of the pump whereby to leave a gap between the vanes and the pump housing so as to permit a portion of the fluid in the spacing to flow smoothly over the top contour of the impeller vanes.
Claims8
A centrifugal pump for shear sensitive fluids comprising a pump housing having an interior surface defining an interior volume, and an impeller rotatably mounted within said pump housing around a central axis, and comprising at least two airfoil-shaped vanes, each of which has a smoothly contoured, rounded leading edge which blends into a generally parabola-shaped top surface, the leading edge of each vane having a cross-sectional shape which is narrowest adjacent the periphery of the impeller, and the vanes are spaced from the interior surface of the pump housing leaving a gap between the top surface of the vanes and the interior surface of the pump housing whereby a portion of the fluid in the housing flows smoothly over the top surface of the vanes whereby to minimize turbulence and shear.
Dependencies are inferred from the claim text.