SUBMERSIBLE CENTRIFUGAL MULTISTAGE PUMP Russian patent published in 2001 - IPC

FIELD: hydraulic mechanical engineering. SUBSTANCE: pump is used for liquid pumping over, in particular, for petroleum production from well. Pump has a body which accommodates shaft with working impellers which rests on radial and axial bearings. Pump shaft consists of several at least two sections thrusting into each other with their ends in succession. Sections are connected to one another by means of spline couplings. Shaft is arranged in single body and axial bearing is mounted on lower section of shaft only. The invention allows creation of high-pressure pump of single-body design without intermediate flange joints which reduces time required for mounting and dismantling. EFFECT: enhanced reliability. 1 dwg