Patent ID: 6720685
Filing Date: 2004-04-13
Classification: F02C,F28D,F28F,H02K

Abstract:
A method of making a turbogenerator cooling system, comprising the steps of:(a) providing a turbogenerator inlet; (b) providing a hood section having a front end, a rear end adjacent said turbogenerator inlet, a substantially cylindrical outer surface extending from said front end to said rear end, a substantially cylindrical inner surface extending from said front end to said rear end, and holes adjacent said rear end extending through said hood section; (b) providing external fins extending generally axially from front to rear along said outer cylindrical surface of said hood section; (c) providing a shroud enclosing said hood section and said external fins; (d) providing internal fins extending generally from front to rear along said inner cylindrical surface of said hood section; (e) press-fitting a stator within said hood section in contact with said internal fins; (f) mounting a permanent magnet rotor shaft rotatably within said stator; and (g) mounting a fan on said permanent magnet rotor shaft for rotation therewith arranged for drawing cooling air (1) rearwardly along said external fins between said hood section and said shroud, (2) inwardly through said holes adjacent the rear end of said hood section, and (3) forwardly away from said turbogenerator inlet along said internal fins between said hood section and said stator.