PUMP Russian patent published in 2001 - IPC

FIELD: mechanical engineering; vortex pumps. SUBSTANCE: pump has a split housing with inlet and outlet branch pipes and impeller. Dividing gate formed by projections and cavities of housing is installed between branch pipes. Concentric passage grooves divided by concentric projections are made on end surface of impeller. Grooves and projections of impeller and projections and cavities of housing are made to provide getting of impeller projections into housing cavities at minimum clearances. Projections and grooves of impeller are divided into several sectors in radial plane. Sectors are separated from each other by spaces uniformly arranged over circumference and having no projections. Depth of spaces is equal to depth of passage grooves. Inlet branch pipe of pump is made on side wall of housing in form of slot in radial plane. EFFECT: increased head. 2 dwg