Patent ID: 6772504
Filing Date: 2004-08-10
Classification: H02K,Y10T

Abstract:
A method for assembling a rotating machine, the rotating machine comprising a plurality of conductive rotor bars spaced from a rotating shaft, each of the plurality of conductive rotor bars having a first and second end, at least one of the plurality of conductive rotor bars having at least one internal conduit extending from its first to second end; a first end plate having a first bore in which the rotating shaft is sealingly fixed, the first end plate further having means for sealingly fixing the first end of each conductive rotor bar having the at least one internal conduit thereto, the first end plate having fluid flow means for providing fluid flow to the first end of the internal conduit; and a second end plate having a second bore in which the rotating shaft is sealingly fixed, the second end plate further having means for sealingly fixing the second end of each conductive rotor bar having the at least one internal conduit thereto, the second end plate further having fluid flow means providing fluid flow from the second end of the internal conduit, the method comprising the steps of:assembling the plurality of conductive rotor bars to the at least one intermediate member and the first end of each conductive rotor bar having the at least one internal conduit to the first end plate; heating the top region of a molten salts bath such that the top region is maintained at a normal brazing temperature; only immersing the first end plate and the first ends of the plurality of conductive rotor bars into the top region of the molten salts bath; salts brazing the first end of each conductive rotor bar having the at least one internal conduit to the first end plate; either before or after the salts brazing of the first end of each conductive rotor bar having the at least one internal conduit, assembling the second end plate to the second end of each rotor bar having the at least one internal conduit to the second end plate; only immersing the second end plate and the second ends of the plurality of rotor bars into the top region of the molten salts bath; and salts brazing the second end of each conductive rotor bar having the at least one internal conduit to the second end plate.