Spacer assembly for a stator venting duct of an electric power machine

A spacer assembly for a stator venting duct of an electric power machine having a stator magnetic circuit constituted by an axial stack of magnetic laminations, said stack being held clamped and being cooled by circulation of a fluid in venting ducts each formed by a gap which is maintained by spacer members between two laminations of the stack, said spacer assembly including:

• a metal support sheet incorporated in the axial stack of magnetic laminations to constitute one side of the venting duct therein, said metal support sheet having an inner surface on the venting duct side and an outer surface on the opposite side, said metal support sheet being of the same magnetic quality and same thickness as the laminations of the magnetic circuit and having fixing means which project into the venting duct from said inner surface;
• and
• spacer members fixed on said inner surface of said metal support sheet by means of said fixing means so as to maintain the gap which forms a venting duct between said surface and the adjacent magnetic lamination on the other side of the venting duct;
• and
• wherein said spacer members comprise flexible rods made of an insulating material extending lengthwise in the plane of the gap, having a thickness coextensive with the thickness of said gap, and wherein said fixing means constitute a succession of at least three side stops for each of said flexible rods, said side stops being disposed alternately on either side of each rod and out of line so as to keep each rod elastically bent in the plane of the gap providing permanent lateral pressure of the rod by deformation on each of the stops.