DREG PUMP Russian patent published in 2008 - IPC F04D7/04 F04D29/42 

FIELD: constriction, production and processing of mineral materials, cleaning of water ponds.

SUBSTANCE: proposed pump has outer housing 1 and inner housing 2 made in form of volume and placed inside outer housing. Housing 2 is made integral with front armored disk with flange 4. Pump has shaft with fitted on working wheel 5, suction branch pipe 6 and delivery branch pipe. Branch pipe 6 is provided with flange 8 located at a distance from end face plane of branch pipe 6. Flanges 4 and 8 are butt-joined to form slot to receive projection 9 of working wheel 5. Butt joint of flange 8 and projection 9 is made over end face planes and cylindrical surfaces. Butt joint of projection 9 of working wheel 5 and flange 4 of front protective armored disk is made over cylindrical surfaces, and butt joining of flange 8 of branch pipe 6 and flange 4 of armored disk is provided over end face planes. Owing to butt joining of said units, lock is formed preventing penetration of hydraulic mixture between housing 1 and 2.

EFFECT: elimination of cavitation in inner housing and prevention of penetration of hydraulic mixture between housing.

5 cl, 3 dwg