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Image from page 24 of “Steam turbines a sensible and theoretical treatise for engineers and students, including a discussion of the gas turbine” (1917)
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Identifier: steamturbinespra00moye
Title: Steam turbines a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine
Year: 1917 (1910s)
Authors: Moyer, James Ambrose, 1875-
Subjects: Steam-turbines
Publisher: New York, Wiley
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
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oshow the shape of the blades or vanes, as well as to illustrate the passage of steamfrom the nozzle into and by means of the blades. t See page 8. INTRODUCTION all the positive aspects of modern machine tools and appliances,with the result that an engine was developed which, in economy,compared nicely with our elaborate and complex modernengines. In 1577 a German mechanician, it is mentioned, utilized a turbine simi-lar to Heros to rotate reaming and burnishing tools, but fromthe time of Hero down to the seventeenth century there is norecord of progress in the improvement of steam heat engines. In1629 Branca, an Italian architect, made a steam turbine(Fig. four) resembling a water wheel, which was driven by theimpulse from a jet of steam directed by indicates of a nozzle uponsuitable vanes attached to thewheel. Brancas turbine en-gine, nevertheless, was not success-ful and until the finish of thenineteenth century, though inthe interval numerous steam tur-bines and other rotary engineswere patented, the piston or
Text Appearing Right after Image:
reciprocating steam engine, Fig. four. Brancas Turbine. under the leadership of Watt, had, commercially, an unrestricted field and remarkable benefits were accomplished. It is intriguing to observe that the modern day variety of impulseturbine with a single row of blades like the a single illustrated inFig. 1 is virtually the very same, except for details, as the historicBrancas wheel. The principal distinction is that Brancas wheelwas not enclosed in a casing. Essential parts — the nozzle,the blades, the wheel, and the shaft — were virtually the sameas in some modern machines. Almost certainly if Branca had under-stood the laws of the expansion of steam as we do to-day, he couldhave produced a profitable prime mover of his turbine. These whocame right after him had been aided not only by a superior knowledgebut also by the possibilities for scientific investigation and theskill of our present-day workshops. De Laval Type. Dr. Gustaf De Laval, a Swedish scientist, was six THE STEAM TURBINE a pioneer in the modern day commerc
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Image from web page 209 of “Steam turbines a sensible and theoretical treatise for engineers and students, which includes a discussion of the gas turbine” (1917)
Image by World wide web Archive Book Photos
Identifier: steamturbinespra00moye
Title: Steam turbines a sensible and theoretical treatise for engineers and students, which includes a discussion of the gas turbine
Year: 1917 (1910s)
Authors: Moyer, James Ambrose, 1875-
Subjects: Steam-turbines
Publisher: New York, Wiley
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
View Book Web page: Book Viewer
About This Book: Catalog Entry
View All Photos: All Images From Book
Click here to view book on-line to see this illustration in context in a browseable on the internet version of this book.
Text Appearing Prior to Image:
r~ km**** Fig. Shaft and Blade Disks of De Laval Multi-stage Turbine. ber formed among diaphragms held in a cylindrical casing.Steam is admitted to the steam chest at the appropriate-hand end ofthe casing and then flows by way of the nozzles of the 1st stageand discharges upon the blades of the initial disk.* Subsequent the * In the latest designs of these turbines, there are two blade disks in the firststage with a set of intermediate blades, making two velocity stages similar toFig- 39- 190 THE STEAM TURBINE steam flows by means of guide vanes in the diaphragm separatingthe very first stage from the second and impinges upon the secondblade disk, and so on by means of succeeding stages of the turbine.The nozzles of the initial stage occupy only a portion of the cir-cumference, thereby avoiding the issues of quite brief blade
Text Appearing Right after Image:
Fig. 89. Diaphragm (displaying nozzles) of a De Laval Multi-stage Turbine. lengths which would otherwise be essential if the admission ofsteam had been permitted all about the circumference in thisstage. The blades or buckets of all De Laval turbines are drop Industrial Sorts 191 forgings and the bulb shanks are accurately machined to fit thecorresponding recesses in the blade disks. With the exception of the nozzles in the 1st stage, which havebeen described in connection with the single stage De Lavalturbine, the nozzles of the succeeding stages are formed by the
Note About Images
Please note that these photos are extracted from scanned web page photos that might have been digitally enhanced for readability – coloration and appearance of these illustrations could not perfectly resemble the original operate.