. Railway mechanical engineer . Two Single Stage ■G Direct-Connected toStage Turbine De Laval Velocity- ports for the floats or vanes obstruct the flow of the air, and theamount of surface in contact with the air moving at high veloci-ties is large, resulting in considerable loss by skin friction. The hM. 101- R/MLWAY AGE GAZETTK, MIICI lANICAL IDITION 375 crtkicncy is luvv iiiid Ihc action iKiisy, and as ordinarily Ijiiilt, thefan is bulky, dnc to the slow speeds required because (jl struc-tnral weakness and lack of balance. The so-called multi-bladefans, which to some extent have replaced th
. Railway mechanical engineer . Two Single Stage ■G Direct-Connected toStage Turbine De Laval Velocity- ports for the floats or vanes obstruct the flow of the air, and theamount of surface in contact with the air moving at high veloci-ties is large, resulting in considerable loss by skin friction. The hM. 101- R/MLWAY AGE GAZETTK, MIICI lANICAL IDITION 375 crtkicncy is luvv iiiid Ihc action iKiisy, and as ordinarily Ijiiilt, thefan is bulky, dnc to the slow speeds required because (jl struc-tnral weakness and lack of balance. The so-called multi-bladefans, which to some extent have replaced the paddle-wlieel fan,run at slill slower speeds for the same pressures and type of fan is suited f(]r direct connection to the modernlii,i,ii-s|Ked rotative prime movers, such as the steam turbine and. Sectional View of a Single Stage Double Suction Blower the electric motor. The DeLaval Steam 1 urbine Company. Tren-ton, N. J., by employing the same materials and workmanshipused in building its turbines, has bound it possible to run centrifu-gal blower and compressor wheels safely at peripheral velocitiesof 450 to 600 ft. per second, rendering practicable the generationI if 3 or 4 111. pressure per sq. in. in a single-stage blower, and the connection of the blower or compressor directly to the tur-bine in nearly all cases. The construction of a single-stage type of blower is shownin the sectional drawing. The hotisings of blowers ai the double-suction type arc in one piece, usually of cast iron. The bearingbracket is cast uitegral with a circular inlet rmg or bell, fittuiginto the eye or opening of the casing, the opening being of suf-ficient diameter to permit removal of the impeller. The hous-ing is so formed as lo provide an efficient diffusor and volute,the discharge opening of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
