FIELD: engines and pumps.
SUBSTANCE: claimed pump comprises the shaft with distributor and working wheel. The distributor is composed of the all-welded iron structure consisting of the shell, lower disc with the hub, upper disc and blades. Impeller is composed of all-cast iron structure, drive disc with hub, cover disc and blades. Axial supports including the trust washers are arranged between the unit hub and drive disc and thrust washers. Seal sleeve is fitted on the shaft for every stage, its length making at least fifty percent of the unit hub length. The unit hub ID the wheel hub side has the groove of diameter larger than wheel hub OD.
EFFECT: higher efficiency of rotary pump, longer life, lower production costs.
6 cl, 6 dwg
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