The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 1997
Filed:
Dec. 12, 1994
Emil D Jarczynski, Scotia, NY (US);
Rebecca A Nold, Clifton Park, NY (US);
William H Boardman, IV, Burnt Hills, NY (US);
General Electric Co., Schenectady, NY (US);
Abstract
In a ventilated cooling system for a generator, the cooling ducts in the stator are arranged to control the flow of cooling gases through the stator. The ducts in the stator extend radially and direct cooling gases from the outer periphery of the stator to its inner cylindrical surface. Cooling gases flow radially inward through these stator ducts, extract heat out of the stator and exit from the stator ducts into an annular air gap between the stator and rotor. A fan on the rotor draws the heated air out from the air gap and causes more cooling gas to be drawn into the stator. The cooling ducts in the stator are spaced and sized to optimally distribute the flow of cooling gases through the stator by equalizing the pressure drops between the stator outer plenum and the entrance to the rotor exhaust fans. For example, the stator ducts may be spaced close together at the center of the stator and farther apart near the ends of the stator to provide balanced cooling flows and uniform temperatures. Similarly, the cross-sectional area of the cooling ducts at the center of the stator may be greater than that of the ducts near the ends of the stator. By arranging the spacing and area of the stator ducts along the length of the stator, the volume of cooling gases and the required pressure head are reduced and minimized. In addition, the volume of cooling gases may be directed to those sections of the stator that most require cooling.