SEALED CENTRIFUGAL EXTRACTOR Russian patent published in 2025 - IPC B01D11/04 

FIELD: performing operations.

SUBSTANCE: invention relates to designs of centrifugal extractors for carrying out a mass exchange process in a system of liquid solutions with sediments, in particular to sealed centrifugal extractors for working with chemically aggressive, radioactive and poisonous substances solutions, and can be used in hydrometallurgical, radiochemical and chemical industries. Sealed centrifugal extractor comprises a housing with a mixing chamber, heavy and light phases discharge chambers, a support flange and a housing cover, a drive with a drive shaft, a bearing support with a mounting flange with outlet holes interconnected with gaps in bearings, with the bearing support shaft arranged in it, plain bearings made in the form of annular thrust bearings and cylindrical bushings with grooves and chamfers, a magnetic coupling with a driving and a driven half-couplings, with a housing cover placed between them, fixed on the bearing support shaft a rotor with a transporting device, a mixer, a separation chamber with a separation nozzle, a light phase discharge device with an overflow hole, a disc with peripheral overflow holes, a rotor cover with an overflow hole, which forms a hydraulic lock chamber with the disc, which is interconnected with the grooves in the bearings gaps, activator, made in the form of an annular bushing and a ring placed in the hydraulic lock chamber, in which the inner bushing is provided on the cylindrical surface and ends with communicating longitudinal and radial grooves, on its angular edges there are sector chamfers, with the formation of rotating upper and lower sector cavities between the angular projections remaining without chamfers so that the upper sector cavities are interconnected with all grooves on the upper end, and its lower sector cavities are interconnected only with those longitudinal grooves, which are not interconnected with radial grooves on the lower end face and are interconnected with longitudinal grooves of the lower centre plate at coincidence of their mutual angular orientation.

EFFECT: preventing clogging of the bearing lubrication channel by the heavy phase flow circulating in its gaps, increasing the service life of the centrifugal extractor and the product output.

8 cl, 6 dwg