Patent ID: 8138642

Claim:
A rotor for a dynamoelectric machine, comprising: a rotor shaft including a first shaft having a first shaft wall circumscribing a hollow interior and having at least one first discharge orifice extending through the first shaft wall, and a second shaft within the hollow interior and coupled with the first shaft such that the first shaft and the second shaft are co-rotatable, the second shaft having a second shaft wall and at least one second discharge orifice extending through the second shaft wall, and the at least one first discharge orifice and the at least one second discharge orifice are axially spaced apart; a rotor core including a plurality of laminations stacked together, the plurality of laminations including at least one lamination comprising a lamination body with an annular portion circumscribing an open center, a plurality of pole portions extending outwardly from the annular portion relative to the open center, and a plurality of coil winding regions adjacent to corresponding ones of the plurality of pole portions, the annular portion including at least one channel running between the open center and at least one of the plurality of open coil winding regions; a plurality of coil windings wound on the rotor core; a plurality of insulators each including an elongated insulator body comprising an electrically insulating material circumscribing an interior coil winding region through which at least a portion of one of the plurality of coil windings extends and spanning between open ends, the elongated insulator body including a fluid entry orifice between the open ends; and an end plate secured near an end of the plurality of coil windings, the end plate including an end plate body having first and second sides, the first side having a plurality of coil end winding cover portions circumferentially spaced around the first side such that each coil end winding cover portion is adjacent an end of one of the plurality of coil windings, and at least fluid discharge outlet located circumferentially between two of the coil end winding cover portions and that extends between the first and second sides.