Impeller shoe for impact crusher

摘要

An impeller shoe for a centrifugal rock crushing machine comprises an elongated body of wear resistant alloy material having a generally trapeziform shape with a back bearing surface on one side and a working front face extending longitudinally on its other side. The front face has a plurality of adjacent exterior surfaces, each surface forming a different acute angle with respect to the back bearing surface. The impeller shoe is adapted to be retained by a bracket on a horizontal turntable of the rock crushing machine to propel aggregate striking the front face to an anvil spaced outwardly from the turntable. The multiple exterior sections of the working front face in use produces a progressively wear pattern along its length that is substantial uniform in depth.