PLAIN THRUST BEARING FOR SHAFTS OF SUBMERSIBLE CENTRIFUGAL ELECTRIC PUMPS Russian patent published in 2009 - IPC F16C17/04 F04D29/04 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to structures of plain thrust bearings for shafts or rotating axis of machines and equipment and can be used in submersible multistage centrifugal electric pumps for strata liquid extraction (oil-and-gas mixture) from deep oil wells of minor diametre. Plain thrust bearing contains abutment (1), under-abutment (2) and intermediate thrust collar (3), implemented with flat annular bearing surfaces on its working sides. Ring (3) is free mounted on shaft (7) between abutment (1) and under-abutment (2) with ability of rotation relative to them. Bearing surface (11) of abutment (1) is implemented as smooth. Bearing surface (14) of ring (3) directed to bearing surface (11) is implemented with lubricating grooves (16). Bearing surface (13) of under-abutment (2) is implemented with lubricating grooves (15), and bearing surface (12) of ring (3) directed to bearing surface (13) is implemented as smooth and with major average diametre D₅ than average diametre D₃ of bearing surface (14). Bearing surfaces (13) and (14) are implemented with lubricating grooves (16) and (15). Divided by these grooves for segments. Bearing surfaces (11), (12), (13) and (14) are implemented from wear-resistant substances with solidity not less than 380 HV.

EFFECT: increasing of reliability and vehicle capacity of plain thrust bearings for shafts of submersible centrifugal electric pumps.

3 cl, 6 dwg