Labyrinth Pump

a rotary pump intended mainly for conveying acids and other corrosive liquids, as well as low-viscosity liquids. Specific design features of a labyrinth pump are a plastic housing with a bushing and a screw rotor mounted in it that have multiple-start grooves (a “labyrinth”). When the rotor rotates an intensive flow of the liquid takes place around the protruding threads of the screw and bushing, resulting in the formation of vortices in the liquid and mutual entrainment of its particles, thus producing the required delivery of the liquid. The pump is small. The design and theory of the labyrinth pump, as well as experimental models, were developed in the USSR in 1959 by the All-Union Institute for the Construction of Hydraulic Machines. Pumps for the chemical industry are manufactured for delivery rates up to 6 liters per sec, with a head of up to 150 m.