SUBMERGED ONE-AUGER PUMP BEARING UNIT Russian patent published in 2009 - IPC F04C2/107 F04C15/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil extraction equipment, particularly to submerged one-auger downhole pumps to be used in oil industry. Proposed bearing unit comprises bearing assembly, connector assembly and hydraulic compensator coupled in series. Hydraulic compensator shaft is coupled, on one side, with motor protector shaft and, on its other side, with bearing assembly shaft input extension. Bearing assembly shaft supports oil pump, seals, device for preliminary tensioning and locking bearings on said shaft, radial roller bearings fitted on the shaft both ends and thrust axial bearings arranged there between. The latter have cylindrical or taper rollers, circular pressure and bearing races with circular grooves on the surface of contact with bearing rings, inner and outer bushes. Axial thrust bearing collars have circular grooves accommodating circular dampers made from wire permeable material extending above collar thrust surface facing the bearing ring.

EFFECT: increased delivery, higher reliability and longer life.

5 cl, 6 dwg