Abstract: A reverse flow cooled dynamoelectric machine is provided with duplex gas coolers disposed in a side-by-side relationship. The coolers are baffled such that a portion of the gas flowing through both coolers is channeled to both the end portion of the rotor and to the stator and the body portion of the rotor so that both areas may be effectively cooled under reduced load operating conditions in the event of the failure of one of the coolers. In a preferred embodiment of the invention, first and second U-shaped baffles are disposed between the coolers and the inner walls of a removable dome, and a planar baffle engages adjacent free ends of the U-shaped baffles. The baffle components are dimensioned to ensure satisfactory flow of cooling gas to the body portion of the rotor. Aligned stator and rotor baffles are provided to segregate inlet zones and outlet zones in the gap between the stator and the rotor to better ensure effective cooling of the body portion of the rotor.

Abstract: A dynamoelectric machine including a stator core mounted on keybars. The keybars are in turn supported on spring bars which are fastened to the frame of the machine. The mounting arrangement permits relative movement between the core and the frame and between the keybars and the adjacent spring bars so as to minimize transmission of vibration from the core to the frame. The core is cooled by causing gas under pressure to be forced radially inwardly through first passages in the stator core and radially outwardly through second passages in the core, these first and second passages alternating along the length of the stator. In order to prevent leakage of cooling gas between the inflowing gas stream and the outflowing gas stream which would otherwise reduce the amount of cooling gas flowing through the aforementioned stator core passages, a plurality of baffles are positioned on the spring bars in regions where such leakage might otherwise occur.