Patent ID: 6431823
Filing Date: 2002-08-13
Classification: F04D

Abstract:
A centrifugal pump providing variable capacity and pressure, comprising:a casing having an outlet chamber; an impeller rotatable in said casing; a set of controlling sideplates installed in said outlet chamber movable parallel to the rotational axis of said impeller; positioned such as to change the outlet width and the outlet chamber volume, said sideplates having an inwardly facing concave form with gradually increasing curvature enabling said sideplates to direct a liquid flow along each of said sideplates into an inward spiral; a driving mechanism connected to said sideplates, for axial movement of said sideplates; said sideplates comprising a pair of pilot shafts extending from said outlet chamber into an induction coil for sensing and controlling movement of said sideplates; said centrifugal pump further comprising a control system whose main function is adjusting the axial displacement of said sideplates which automatically controls the variable pumping parameters.