Water-power; an outline of the development and application of the energy of flowing water . mutually neutralizing the thrust. This, how-ever, only occurs comipletely when both wheels are running atecjual gate. A thrust-bearing cannot be dispensed with in thiscase, as one wheel is liable to run at full gate while the otherhas its gate wholly or partly closed. Fig. 167 shows a very neat arrangement of a cast-ironquarter-turn flume for a high head. The flume, by means of aflange strengthened with gussets, rests on iron beams spanningthe tail-race, or wheel-pit. The quarter-turn is made in twohalv
Water-power; an outline of the development and application of the energy of flowing water . mutually neutralizing the thrust. This, how-ever, only occurs comipletely when both wheels are running atecjual gate. A thrust-bearing cannot be dispensed with in thiscase, as one wheel is liable to run at full gate while the otherhas its gate wholly or partly closed. Fig. 167 shows a very neat arrangement of a cast-ironquarter-turn flume for a high head. The flume, by means of aflange strengthened with gussets, rests on iron beams spanningthe tail-race, or wheel-pit. The quarter-turn is made in twohalves, and has a neck strengthened with gussets throughwhich the shaft passes by a stuffing-box. This neck carries abrcJad flange to which is bolted the bridge-tree for sustainingthe crown-gears, which give motion to the horizontal shaftcarrying a pulley and belt for delivering the power. To thehorizontal end of the quarter-turn is bolted a very short lengthof pipe or, more properly, a ring, pierced with rivet-holes forattaching the wrought-iron penstock. A manhole appears in 348 Fig. 167. THE FLUME. 349 the side of the flume for admission to the interior. In tnis formthe word flume is usually apphed to the chamber enclosing-the wheel, the remainder of the pipe being known as the pen-stock. This arrangement is presented by the Rodney HuntCompany of Orange, Mass. In adopting this cut the writer feels obliged to disclaim themethod therein indicated of constructing the arch over the tail-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
