Pump for pumping fibrous pulp suspension

Details Pump for pumping fibrous pulp suspension Pump for pumping fibrous pulp suspension

1995-11-20

1997-04-01

Larson, James

Rotary kinetic fluid motors or pumps

Including means for handling portion separated from working...

416181, 416188, F04D 2922

Patent

active

056159978

ABSTRACT:
The invention relates to a pump for pumping fibrous pulp suspension and separating gas from the suspension, comprising a pump casing with a pump casing chamber (4) with an axial inlet (17) and a radial outlet (6) for the suspension and also a gas outlet (19); in the pump chamber part a pump wheel (3) with a hub (27), on the hub front pump vanes (30) in a front pump chamber part (4A) facing the inlet, rear pump vanes (32) in a rear pump chamber part (4B) and an annular partition (28) between the front and rear pump chamber parts, which partition is joined to the hub; and a drive shaft (10) for the pump wheel which extends through one end wall (7) of the pump casing, and also bearing members (13, 14, 15) for the drive shaft. What is characteristic of the invention is that the hub has an outer portion (36) which extends mainly radially outwards in the rear pump chamber part, that the annular partition is arranged a little in front of the outer hub portion, that the inner diameter of the partition is smaller than the outer diameter of the outer hub portion so that the radial extents of the partition and the outer hub portion at least partly overlap one another in the radial direction, and that channels (50) extend with a portion mainly radially between the rear side (42) of the partition (28) and the front side (37) of the outer hub portion (36) from the inner part of the front pump chamber part (4A) towards the outer part of the rear pump chamber part (4B).

REFERENCES:
patent: 5039320 (1991-08-01), Hoglund et al.
patent: 5209641 (1993-05-01), Hoglund et al.
patent: 5387087 (1995-02-01), Chen

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