. The Street railway journal . into three sections. The turbine receives steamthrough a long radius 7-in. pipe bend from the main steam line, initial condensation being ab-stracted at the turbine by a special superheater fired by naturalgas. Steam then passes successively through a quick-openingthrottle, hand throttle, strainer and poppet admission valveinto the first expansion stage of the turbine. The strainer hasa removable perforated sheet steel pocket which serves toeliminate foreign matter from which turbine blades might re-ceive injury. The admission valve, being nearly 1 sq. ft. in are
. The Street railway journal . into three sections. The turbine receives steamthrough a long radius 7-in. pipe bend from the main steam line, initial condensation being ab-stracted at the turbine by a special superheater fired by naturalgas. Steam then passes successively through a quick-openingthrottle, hand throttle, strainer and poppet admission valveinto the first expansion stage of the turbine. The strainer hasa removable perforated sheet steel pocket which serves toeliminate foreign matter from which turbine blades might re-ceive injury. The admission valve, being nearly 1 sq. ft. in area, is not actuated directly by the valve gear, but by a smallauxiliary cylinder, connected through a relay valve to the high-pressure steam. The relay is controlled through simple linkwork by the sensitive centrifugal governor mounted at the the high-pressure cylinder and driven from a worm gear onthe end of the turbine shaft. This valve gear is directly actu-ated by a reciprocating lever and admits to the turbine short. RAILWAY SWITCHBOARD IN MAIN POWER HOUSE puffs of steam under maximum boiler pressure at a frequencyof about 150 strokes per minute. The method of governing involves a variation of the periodof admission as determined by the position of the governorweights, this governing motion being superposed upon that ofthe reciprocating gear. A speed limit attachment is also used. In anticipation of the accidental breaking of the vacuum orof fluctuating loads momentarily exceeding the normal capacity
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
