MONOBLOCK TYPE PUMP Russian patent published in 2004 - IPC

FIELD: pump manufacture, namely monoblock-type electrically driven pumps. SUBSTANCE: pump includes electric motor having in its flange board distance piece rigidly secured to housing. There are supply inlet opening and helical outlet in housing. Lug of helical outlet is turned to axis of discharging opening. Welded impeller of pump is mounted by means of nut on flats of cylindrical end portion of shaft. Blades of impeller are rigidly secured to discs. Labyrinth sealing is pressed by means of adjustable movable sleeve having on end rubber ring. Outlet opening of helical outlet is arranged along axis directed along radius from axis of impeller. Helix angle from tip of lug of helical outlet until tangent line of liquid separation is equal to 320+-10 degrees+ADs- distance from outlet opening until axis of impeller is equal to 0.25 of diameter of said opening+ADs- angle of lug of helical outlet is equal to 45 degrees. EFFECT: improved design of low-cost highly effective monoblock-type pump. 7 cl, 8 dwg