TWO-STAGE CENTRIFUGAL PUMP Russian patent published in 2020 - IPC F04D1/06 F04D29/66 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in space equipment products thermal control systems. Two-stage centrifugal pump includes a housing installed in its cylindrical bore two bushings fixed relative to the housing and an insert installed between them. Pump shaft is installed inside the bush on bearings. Bearings are arranged in recesses of each bushing. Impeller impregnated on the shaft. Pump incorporates a cage arranged inside the cylindrical bore made in the insert and concentric to its outer surface, and a cover closing this bore from the butt end, which is rigidly attached to the insert. Bearings are fixed in cage inner cavity motionless relative to it. Cage is installed with a radial clearance relative to the cylindrical bore of the insert and with axial clearances between one of its butt end and the wall of the insert boring, as well as between its other butt end and the cover. Vibration isolators in radial and axial directions are installed between cage and insert with cover.

EFFECT: invention is aimed at noise reduction.

1 cl, 1 dwg