FRANCIS TURBINE 



508 



two links coupled to the ring by pins set at 180. To prevent end thrust 

 on the guide spindles due to leakage of pressure water behind these, 



FIG. 239B. Rear Elevation of Francis Turbine for Snoqualmie Falls. 



drainage passages are arranged to carry away any such water into the 

 space behind the wheel. 



In order to tie the two sides of the housing together, a series of tie 

 diaphragms are provided outside the swivel guides and are so formed as 

 to act as preliminary guides. The turbine proper has only one bearing, 

 the direct-coupled generator having two bearings, making the whole unit 



