FIELD: engineering.
SUBSTANCE: invention relates to an apparatus with a centrifugal pump and a grinding device before the impeller (8). The grinding device has a rotating element (13) which engages with a fixed element (15) for grinding solid inclusions in the pumped medium. The fixed element (15) has an outer side (20) which at least partially grips the inner side (21). The fixed element (15) is separated into the outer side (20) and the inner side (21), wherein the outer side (20) and the inner side (21) are made of different materials.
EFFECT: invention is intended for profitability of manufacture, reliable operation, reliable grinding of solid inclusions in the medium and prevention of blockage of the centrifugal pump and connected pipelines.
13 cl, 4 dwg
