Centrifugal pump

Details Centrifugal pump Centrifugal pump

1990-09-07

1992-10-06

Look, Edward K.

Rotary kinetic fluid motors or pumps

Runner or blade selectively adjustable relative to casing

Axially adjusted

4151691, 417 68, F04D 1312

Patent

active

051526638

ABSTRACT:
A centrifugal pump for pumping fiber suspensions including a centrifugal pump housing (50) defining a centrifugal pump chamber (54) having a suspension inlet and suspension outlet. Located within the pumping chamber is a centrifugal impeller (60). A vacuum pump chamber (76) defined by a front wall (112) facing the impeller and a rear wall (110) and opposite the front wall is located adjacent the centrifugal pumping chamber (54). A vacuum pump rotor (96) is mounted within the vacuum pump chamber at a distance from the front and the rear walls (112, 110). The axial distance between the vacuum pump rotor and the front and rear walls (112, 110) is adjustable to a value of less than 0.30 mm, and preferably less than about 0.20 mm.

REFERENCES:
patent: 2571802 (1951-10-01), Wilfley et al.
patent: 3413926 (1968-12-01), Ayson
patent: 3711218 (1973-01-01), Kennel et al.
patent: 3881841 (1975-05-01), Straniti
patent: 4422832 (1983-12-01), Haavik
patent: 4439096 (1984-03-01), Rockwood et al.
patent: 4776758 (1988-10-01), Gullichsen
patent: 4877368 (1989-10-01), Timperi et al.

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