CENTRIFUGAL PUMP Russian patent published in 2024 - IPC F04D1/04 

FIELD: pumps.

SUBSTANCE: invention relates to centrifugal pumps, as well as pumps adapted for pumping special fluids. Pump comprises housing, rear wall, front wall, housing ring arranged between rear and front walls, housing covers, impeller. Front wall is connected to the impeller by an end seal, wherein the impeller comprises a housing, a cover, a ring, blades, a hub, a volute ring, working volume limited by housing front wall, internal radius of volute ring and housing cover, suspension supply branch pipe, suspension discharge branch pipe, characterized by that the housing front wall comprises a through hole, housing ring is made of cylindrical shape, inside the housing ring there is a cover stop ring, cover stop ring divides the inner volume of the housing ring into an air cooling chamber of the end seal and a water cooling chamber of the end seal. On the outer side of the housing ring along the perimeter in the interval from the rear wall of the housing to the cover stop ring there are through holes, impeller is made in the form of a hollow disc, the distance between the front wall and the impeller cover is from 3 mm to 5 mm, wherein the gap formed by the distance between the impeller hub and the front wall of the housing is configured to circulate the suspension from the working volume into the water cooling chamber of the end seal, volute ring is made in the form of a ring, wherein the outer diameter of the volute ring is greater than the diameter of the front wall of the housing, inner diameter of the volute ring is greater than the diameter of the impeller, wherein the inner radius of the volute ring decreases from 160 mm to 125 mm, and transition from smaller radius to larger radius of volute ring is made along arc of circle, in the housing cover there is a hole for arrangement of a suspension supply branch pipe and a hole for arrangement of a suspension discharge branch pipe.

EFFECT: higher reliability of pump.

8 cl, 5 dwg