Dynamoelectric machine including gas baffles

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. Each baffle is of generally U-shape and includes two legs engaging opposite sides of the spring bar with which it is associated and an intermediate leg positioned between the stator core and the spring bar for blocking leakage of gas through the space between the stator core and the spring bar. One of the first mentioned legs is positioned between the spring bar and adjacent keybar and prevents leakage of gas through the space between the spring bar and the keybar.