MULTISTAGE CENTRIFUGAL PUMP STAGE Russian patent published in 2022 - IPC F04D29/44 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular oil engineering, and can be used in the design of centrifugal pumps, and in particular in submersible centrifugal borehole pumps for oil production from wells with a high content of asphalt, resin and paraffin components in the produced product. The stage of a multistage centrifugal pump contains a guide vane located in the housing and an impeller mounted on the shaft. The guide vane and the impeller are made of polymeric material with steel reinforcement. In the guide vane, on the impeller side, axial blind cylindrical holes are made with equal angular distance between themselves and with the same distance from the shaft axis. The holes are equipped with permanent magnets made in response to the holes, installed with alternating poles. The reinforced element of the impeller is made in the form of a disk and is installed on the side of the magnets with a guaranteed axial distance between the ends of the magnet and the disk in the range from 2 to 5 mm. The disc is placed in the body of the wheel with the possibility of its isolation from the pumped medium.

EFFECT: invention is aimed at increasing the efficiency, supply and a significant increase in the overhaul period of the pump.

1 cl, 2 dwg