Pump for pumping fibrous pulp suspensions

Details Pump for pumping fibrous pulp suspensions Pump for pumping fibrous pulp suspensions

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 31/00 (2006.01) B01D 19/00 (2006.01) D21D 5/26 (2006.01) F04D 7/04 (2006.01)

Patent

CA 2161949

A pump for pumping fibrous pulp suspension and separating gas from the suspension, is provided herein. The pump includes a pump casing having a pump casing chamber with an axial inlet and a radial outlet for the suspension and also a gas outlet. A pump wheel is disposed in the pump casing chamber, such pump wheel including a hub. The hub includes a front pump chamber part facing the inlet front pump vane in the front pump chamber part, a rear pump chamber part, rear pump vanes in the rear pump chamber part, and an annular partition between said front pump chamber part and said rear pump chamber part, the partition being joined to the hub. The hub further includes an outer portion which extends mainly- radially-outwardly in the rear pump chamber part. The annular partition is arranged at a distance from, and in front of, the outer collar-shaped hub portion, so that the radial extents of the partition and the outer collar-shaped hub portion at least partly overlap one another in the radial direction. The annular partition further includes channels extending with a portion mainly-radially between the rear side of the partition and the front side on the outer collar- shaped hub portion from the inner part of the front pump chamber part towards the outer part of the rear pump chamber part. The annular partition further includes the fact that the collar- shaped portion on the hub is provided with through-holes behind said pump vanes when seen in the direction of rotation of the pump wheel. The pump includes a drive shaft for the pump wheel, the drive shaft extending through one end wall of the pump casing. The drive shaft further includes bearing members.

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