Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . FIGURE 134. 5,000 CURTIS STEAM TURBINE DIRECT CONNECTED TO 5,000 THREE-PHASE ALTERNATING CURRENT GENERATOR. the step bearing pumps have proven, after a longservice in a number of cases, to be reliable. Thevertical shaft is also held in place and kept steady bythree sleeve bearings, one just above the step, onebetween the turbine and generator, and the other near THE CURTIS STEAM TURBINE 373 the top. These guide bearings are lubricated by astandard gravity feed system. It is apparent that
Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . FIGURE 134. 5,000 CURTIS STEAM TURBINE DIRECT CONNECTED TO 5,000 THREE-PHASE ALTERNATING CURRENT GENERATOR. the step bearing pumps have proven, after a longservice in a number of cases, to be reliable. Thevertical shaft is also held in place and kept steady bythree sleeve bearings, one just above the step, onebetween the turbine and generator, and the other near THE CURTIS STEAM TURBINE 373 the top. These guide bearings are lubricated by astandard gravity feed system. It is apparent that theamount of friction in the machine is very small, andas there is no end thrust caused by the action of thesteam, the relation between the revolving and station-ary blades may be maintained accurately. As a con-. FIGURE 135. 500 CURTIS STEAM TURBINE IN COURSE OF CONSTRUCTION. sequence, therefore, the clearances are reduced to theminimum. The Curtis turbine is divided into two or more stages,and each stage has one, two or more sets of revolvingblades bolted upon the peripheries of wheels keyed tothe shaft. There are also the corresponding sets ofstationary blades, bolted to the inner walls of thecylinder or casing. As in the Westinghouse-Parsons 374 ENGINEERING type, the function of the stationary blades is to givedirection to the flow of steam. Fig. 135 illustrates one stage of a 500 K. W. turbinein course of construction. It will be observed thatthere are three wheels, and that in the spaces betweenthese wheels the stationary buckets or vanes are
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Keywords: ., bookcentury1900, bookdecade1900, bookpu, booksubjectsteamturbines
