SUBMERSIBLE STARING PUMP Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: shaft with impeller is located in vortex chamber of housing. Mounted on side of pump inlet coaxially to its housing is attachment whose chamber is brought in communication with surrounding medium. Arranged in attachment is hydraulic swirl mixer with nozzles connected to high-pressure liquid source and located in center and over periphery of chamber of attachment which is brought in communication with surrounding medium through tangential opening made in attachment and located on side of running of external flow of liquid. Attachment is provided with additional tangential openings spread in height on side of running of external flow. Attachment is provided with screen in area where opening is made. EFFECT: enhanced reliability. 3 cl, 2 dwg