Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . COMMERCIAL TYPES 251 Description. Fig. 134 is a section of a 500-horsepower Ridg-way-Rateau turbine of seven stages. It will be observed thatthis turbine is a remarkably simple design. This turbine is de-signed to operate at 2400 revolutions per minute. In this figurethe main steam pipe is shown at the bottom of the this pipe the live admission steam is discharged into thecored passages supplying the first stage nozzles after passingthrough the throttle valve
Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . COMMERCIAL TYPES 251 Description. Fig. 134 is a section of a 500-horsepower Ridg-way-Rateau turbine of seven stages. It will be observed thatthis turbine is a remarkably simple design. This turbine is de-signed to operate at 2400 revolutions per minute. In this figurethe main steam pipe is shown at the bottom of the this pipe the live admission steam is discharged into thecored passages supplying the first stage nozzles after passingthrough the throttle valve controlled by the governor. Theexhaust pipe leading to the condenser is cast integral with the. Fig. 135. Cast-in Nozzles of Ridgway-Rateau Turbines. base at the right-hand end of the casing. Carbon packings inbushings of anti-friction metal are fitted in the diaphragmswhere the shaft passes through them. Steam leakage throughthese packings is reduced to a very small amount. A Moore steam turbine which differs from the conventionalRateau type in having two velocity stages in the first pressurestage is shown in Fig. 137. Wheel Disks. Typical Rateau disks are shown in Fig. of construction are shown better, however, in Fig. shroud ring is fitted around the blades as illustrated in thelatter figure. The blades resemble those used in De Laval andCurtis turbines except that they have a flat projection at the rootwhich is provided to fasten them to the flange of the disk byriveting. The holes shown in the disk in Fig. 132 were drilled 252 THE STEAM TURBINE for balancing. Fig. 136 shows a group of Rateau disks assembledon the turbine shaft. Manufacturers. Rateau turbin
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