Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . wheel K. This latter isforced upon the shaft L, which, with couplings M,connects to the dynamo or is extended for othertransmission. O, Fig. 148, is the governor held with a taper shankin the end of the shaft L, and by means of the bellcrank P operates the governor valve C. The flexibleshaft is supported in three bearings, Fig, 147. Q andR are the pinion bearings and S is the main shaft bear-ing which carries the greater part of the weight of thewheel. This bearing is self-aligning, being held to
Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . wheel K. This latter isforced upon the shaft L, which, with couplings M,connects to the dynamo or is extended for othertransmission. O, Fig. 148, is the governor held with a taper shankin the end of the shaft L, and by means of the bellcrank P operates the governor valve C. The flexibleshaft is supported in three bearings, Fig, 147. Q andR are the pinion bearings and S is the main shaft bear-ing which carries the greater part of the weight of thewheel. This bearing is self-aligning, being held to itsseat by the spring and cap shown. T, Fig. 147, is the flexible bearing, being entirelyfree to oscillate with the shaft. Its only purpose is toprevent the escape of steam when running non-con-densing, or the admission of air to the wheel case whenrunning condensing. The flexible shaft is made veryslender, as will be observed by comparing its size withthat of the rotary pump shaft in Fig. 146. It is by meansof this slender, flexible shaft that the dangerous feature DE LAVAL STEAM TURBINE 401. 402 ENGINEERING of the enormously high speed of this turbine iseliminated. The governor is of the centrifugal type, althoughdiffering greatly in detail from the ordinary fly ballgovernor, as will be seen by reference to Fig. 149. Itis connected directly to the end of the gear wheel weights B are pivoted on knife edges A with
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Keywords: ., bookcentury1900, bookdecade1900, bookpu, booksubjectsteamturbines
