HIGH PRESSURE CENTRIFUGAL PUMP Russian patent published in 2022 - IPC F04D1/04 

FIELD: pumping.

SUBSTANCE: The invention relates to pumping and can be used for pumping liquids, including those contaminated with abrasive impurities, such as sand. High-pressure centrifugal pump, consisting of a shaft with impellers, outriggers of the shaft in the form of plain bearings, a housing with guide vanes fixed in it, equipped with inlet and outlet nozzles, while the plain bearing consists of an inner sleeve fixed to the shaft and an outer sleeve with helical grooves on the inner surface fixed in the housing, it is equipped with auxiliary pipelines with filters for supplying part of the pumped liquid to the plain bearings from the injection line and auxiliary pipelines with hydraulic throttles adjustable by control and control equipment for draining liquid from the plain bearings into the inlet pipe, and external sleeves of plain bearings are made of elastomer with Poisson's ratio close to 0.5 (for example, rubber) and are provided with through axial channels evenly spaced throughout the volume of the sleeve.

EFFECT: reduction of vibration of the pumping unit, increase of its reliability and durability.

1 cl, 2 dwg