IMPELLER FOR CENTRIFUGAL PUMP, PARTICULARLY FOR A RECESSED-IMPELLER PUMP, AND PUMP WITH SUCH AN IMPELLER

摘要

An impeller (10) for centrifugal pump comprising:- a disc (11),- a succession of vanes (12) which extends from the disc (11) around the rotation axis,- a central body (13), adapted for connection to a rotating shaft,the vanes (12) having a profile with a double curvature:- a first curvature with respect to a sectional plane that is parallel to the disc (11),- a second curvature with respect to a sectional plane that is perpendicular to the plane of the disc (11),the first curvature and the second curvature having a concavity directed toward the rotation axis,each one of the vanes (12) comprising an inside curve (16) and an outside curve (17) with different curvatures:- both considering a sectional plane that is parallel to the disc (11),- and considering a sectional plane that is perpendicular to the disc (11),the inside curve (16) having an angle of curvature (a") chosen between zero and one quarter of a round angle, and/or the outside curve (17) has an angle of curvature (a') chosen between zero and one quarter of a round angle.