File:Image from page 1288 of "Electric railway review" (1906) (14761310502).jpg

Identifier: electricrailwayr19amer Title: Electric railway review Year: 1906 (1900s) Authors: American Street and Interurban Railway Association Subjects: Street-railroads Electric railroads Publisher: Chicago : Wilson Co

View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image: Westinghouse Double-Flow Turbines—Interior of Brunot Island Station of the Pittsburg Railways Company, Showing Turbines During Erection. larger capacity at high speeds. For the large machines, theadvantages of the combined impulse and reaction principle ofsteam expansion, together with the double-flow construction,are so important that the practical result, as embodied in themachine under description, is most fortunate. The Parsonsand the double-flow type are practically upon the same basis obtained without the use of dummy or balance pistons. Asthese low-pressure turbines are designed to utilize all theexhaust steam from a non-condensing reciprocating engine, itis possible to tie the engine and turbine together electrically,thus making the use of a governor on the low-pressure turbineunnecessary. With the exception that, as mentioned, the gov-

Text Appearing After Image: Westinghouse Double-Flow Turbines—Side and End Elevation of Turbine for Brunot Island Power Station. as regards economy. The advantages of the double-flow con-struction will probably be most clearly understood by firstconsidering the low pressure double-flow turbine shown inFigure 1. Here we have a turbine of the simplest possible con-struction, consisting entirely of two identical Parsons turbinesplaced end to end, taking steam at the center and exhaustingat both ends. It will be evident by an examination of the ernor may often be omitted from the low-pressure turbine, itis practically identical with the high-pressure double-flow tur-bine. In fact, the high-pressure machine is directly evolvedfrom the low pressure by the simple addition of a high-pressure impulse element mounted at the center of the rotor,this simple element serving in a capacity closely analogous tothe high-pressure cylinder of a triple-expansion reciprocating 644 ELECTRIC RAILWAY REVIEW Vol. XIX, No. 22. engine.

Note About Images