PUMP FOR FIBROUS PULP SUSPENSION WITH MEANS FOR SEPARATING GAS FROM THE SUSPENSION

摘要

The invention relates to a centrifugal suspension pump with gas separating means, comprising a pump wheel (3) with a hub (27), pump vanes (30) in a front pump chamber part (4A) facing the inlet, pump vanes in a rear pump chamber part (4B) and an annular partition (28), joined to the hub, between these parts. The hub has an outer portion (36) which extends mainly radially outwards in the rear part. The annular partition is arranged a little in front of this outer hub portion. The inner diameter of the partition is smaller than the outer diameter of the outer hub portion so that the partition and the outer hub portion at least partly overlap one another radially. 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 (4A) towards the outer part of the rear pump chamber part (4B).