SUBMERSIBLE MULTI-STAGE CENTRIFUGAL PUMP WITH RADIAL-THRUST BEARINGS Russian patent published in 2005 - IPC

Abstract RU 2250392 C2

FIELD: submersible multi-stage centrifugal pumps for recovery of oil from wells.

SUBSTANCE: proposed pump has set of stages assembled in cylindrical housing with impellers having circular grooves and fixed guide apparatus. Guide apparatus is provided with bearing bands and bores which are used as radial supports for pump rotor. Fitted in circular grooves of impellers are bearing washers adjoining bearing bands of guide apparatus. Bearing washers and bands are spherical in shape. Provision is made for increase of service life of pump by protection of friction surface of guide apparatus hubs against wear at handling fluids containing abrasive particles. Vibration of rotor is reduced due to centering relative to guide apparatus and relief of radial supports of pump shaft irrespective of wear of friction surface of radial-thrust bearings in axial direction.

EFFECT: enhanced efficiency and reliability.

1 dwg

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RU 2 250 392 C2

Authors

Volkov V.N.

Bibikov S.V.

Dates

2005-04-20—Published

2002-02-14—Filed