IMPELLER Russian patent published in 2001 - IPC

FIELD: mechanical engineering; axial impeller pumps. SUBSTANCE: impeller has bushing to which blades are connected. Angle of setting of blade working surfaces is reduced both in radius from bushing to periphery, and in impeller axis from inlet to outlet. Tanks to it each blade of impeller has bowl-like shape and forms, together with bushing, a space limited from outside and rear. Sealing ring is secured on periphery of blades. Making of impeller blades with angles of tilting relative to axis at bushing close to 90 degrees in longitudinal sections passing through axis makes it possible to obtain high head, and angles of tilting close to zero on periphery contribute to forming directed flow of liquid thrown by impeller owing to forced directing of liquid. , entrained by blades, along impeller axis. EFFECT: enhanced reliability in operation. 3 cl, 2 dwg