CENTRIFUGAL PUMP Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: main disk of working wheel and housing of the pump define cylindrical seal and relief chamber. The chamber is in communication with the inlet of the working wheel through the radial and axial passageways. Each radial passageway has periphery and central parts. The periphery part is inclined to the radius of the working wheel in the direction of its rotation. The central part is inclined in the longitudinal direction. The guide ribs are made at the face of the axial passageway. EFFECT: enhanced reliability. 2 dwg