Dynamic shaft seal for pumping fibrous slurries

Details Dynamic shaft seal for pumping fibrous slurries Dynamic shaft seal for pumping fibrous slurries

1992-09-28

1994-09-06

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277133, 4151711, F16J 1544

Patent

active

053441630

ABSTRACT:
A dynamic shaft seal for a fluid handling apparatus for pumping fibrous slurries, the fluid handling apparatus comprising an impeller mounted on a rotating shaft disposed in a pump housing, the shaft extending through an aperture extending from the pump housing into an impeller casing forming part of the pump housing. Prime mover means rotate the shaft. A slurry of a dispersed fibrous material in a fluid is disposed in the impeller casing, and a repeller chamber is formed in the pump housing in proximity to the aperture and in communication with the impeller casing. A repeller attached for rotation with the shaft extends into the repeller chamber to force a portion of the fluid in the impeller casing to move in a vortex in a direction away from the aperture. The invention includes means associated with the repeller to apply shear forces to the fluid vortex, and create circulatory flow within the vortex to maintain the dispersion of the fibrous material in the slurry.

REFERENCES:
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patent: 3040670 (1962-06-01), Schenck et al.
patent: 4466619 (1984-08-01), Adams
patent: 4466772 (1984-08-01), Okappu et al.
patent: 4545586 (1985-10-01), von Pragenau
patent: 4576383 (1986-03-01), Ballard
patent: 4685684 (1987-08-01), Ballard
patent: 4884945 (1989-12-01), Boutin et al.
patent: 5158304 (1992-10-01), Orlowski
patent: 5217234 (1993-06-01), Hornsby

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