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Chicago, IL

Group Report Corliss Engine: The Great Corliss Engine

Group Report Corliss Engine: The Great Corliss Engine This remarkable mechanism was a simple condensing engine. It was finished in 1876 requiring seven months to build. It furnished power for running the machinery at the Philadelphia Centennial Exposition in 1876. It was purchased by George Pullman in 1880 and was moved from Providence RI where it had been in storage after the run of the Centennial Exposition to Pullman, requiring a train of thirty-five cars to transport it. It was shaped like the capital letter A and from the floor to the top of the walking beam was forty feet. The cylinders were forty inches in diameter affording a ten-foot stroke. The diameter of the crankshaft was eighteen inches and twelve feet long. The diameter of the large gear (fly) wheel was thirty feet with a face of 24 inches and was the largest gear wheel in the world. The gear wheel meshed into a pinion wheel that powered 3268 feet of main power shafting located in tunnels 4-5 feet below grade in tunnel. From the main power shaft, approximately 13,000' of overhead shafting and two miles of belting applied to the machinery in the car shop. The engine was capable of developing 2500 horsepower. When the engine was started at the Centennial exposition in Philadelphia's Fairmont Park by President Grant and Emperor Don Pedro III of Brazil, they were supported by a choir of 1000 singing Handel's Hallelujah Chorus, a band of 150 pieces playing the Centennial March composed by Richard Wagner, followed by 100 gun salute. The engine was started by Florence Pullman on April 2, 1881, and ran until the fall of 1910, when it was scrapped after electricity replaced steam as the power source. Portions of the foundation of the original engine house and power shaft tunnels located below grade are still visible on the site. The engine house at the Pullman Factory was located east (to the rear) of the North Factory wing in a room 40' square and 66' high. Wide aisles around the engine platform were providing for visitor on sight seeing tours of the factory works. The cost of engine was $77,000. Group Report Corliss Engine  (Oct 13, 2013 | post #1)

Chicago, IL

Corliss Engine Group Gear Mechanisms: Corliss steam engine

Corliss Engine Group Gear Mechanisms: Corliss steam engine A Corliss steam engine (or Corliss engine) is a steam engine, fitted with rotary valves and with variable valve timing patented in 1849, invented by and named after the American engineer George Henry Corliss in Providence, Rhode Island. Engines fitted with Corliss valve gear offered the best thermal efficiency of any type of stationary steam engine until the refinement of the uniflow steam engine and steam turbine in the 20th century. Corliss engines were generally about 30 percent more fuel efficient than conventional steam engines with fixed cutoff.This increased efficiency made steam power more economical than water power, allowing industrial development away from millponds. Corliss engines were typically used as stationary engines to provide mechanical power to line shafting in factories and mills and to drive dynamos to generate electricity. Many were quite large, standing many metres tall and developing several hundred horsepower, albeit at low speed, turning massive flywheels weighing several tons at about 100 revolutions per minute. Some of these engines have unusual roles as mechanical legacy systems and because of their relatively high efficiency and low maintenance requirements, some remain in service in early 21st century (see, for example, the engines at the Hook Norton Brewery and the Distillerie Dillon in the list of operational engines). Contents 1 Corliss engine mechanisms 1.1 Corliss valve gear 1.2 Corliss valves 1.3 Barring and barring engines 2 Company history 3 Centennial Engine 4 List of operational engines 5 See also 6 References 7 External links Corliss engine mechanisms Corliss engines have four valves for each cylinder, with steam and exhaust valves located at each end. Corliss engines incorporate distinct refinements in both the valves themselves and in the valve gear, that is, the system of linkages that operate the valves. The use of separate valves for admission and exhaust means that neither the valves nor the steam passages between cylinders and valves need to change temperature during the power and exhaust cycle, and it means that the timing of the admission and exhaust valves can be independently controlled. In contrast, conventional steam engines have a slide valve or piston valve that alternately feeds and exhausts through passages to each end of the cylinder. These passages are exposed to wide temperature swings during engine operation, and there are high temperature gradients within the valve mechanism itself. Clark (1891) commented that the Corliss gear 'is essentially a combination of elements previously known and used separately, affecting the cylinder and the valve-gear'.The origins of the Corliss gear with regard to previous steam valve gear was traced by Inglis (1868). Corliss Engine Group Gear Mechanisms  (Oct 10, 2013 | post #1)

Chicago, IL

Corliss Motor Co Brown Gruppe Forge rom

Corliss Motor Co Brown Gruppe Forge rom , maskinrom , kjeler , damp for maskinverksted og gassmotorer Den delen av konstruksjonen av maskinverksted er lik til støperiet . Galleriet av maskinverksted er fremstilt av dobbelt bredde og er plassert på den ene siden , i stedet for å være halvparten av bredden og plassert på begge sider. Utformingen av bygningene ble bestemt på grunn av det faktum at større plass kunne brukes mer fordelaktig som kunne gjøres med smale vinger på hver side av bygninger. Dette har også den fordelen som kan oppnås mer lys på alle sider av bygningene og jo bedre vi kan gi for krantjenester mellom de to bygningene . Maskinen butikken har en varighet i hoveddelen av 65 fot , og er utstyrt med to 30 -tonns kraner løfter med 40 fot klart. Under gulvet av galleriet er en 10 tonns kran , som strekker seg langs hele lengden av butikken. Galleriet er 53 meter bred i den klare , og er spesielt tilpasset miljøet og lettere klasse arbeid. Spesiell oppmerksomhet ble betalt til spørsmålet om belysning , og en stor mengde glass er forventet , brukte ribbet glass overalt . Room smie, motor og fyrrom er plassert på den sørlige enden av maskinen butikken . Rikelig plass er gitt i maskinrommet og fyrrom å øke anlegget . Maskinen butikken er 440 meter lang og 118 meter bred , er gitt ved den nordlige enden av butikken for å utvide den ønskede lengden . I ordningen av verktøy gruppe plan ble gjennomført i den grad det er mulig, dvs. kommoder er i en gruppe , kjedelige møller i en annen, og så videre, for å få alle operasjoner av landet er i en spesiell del av lageret . Ved å utstyre butikken med verktøy enn nyere design og modell av tunge ble valgt for å sikre høy skjærehastighet og høyhastighets maskinering og uten verktøy ble kjøpt , som ikke er i det hele tatt ane Møt de strengeste kravene . Når spørsmålet om overføring elektroverktøy ble tatt , ble det funnet at ingen virkelig tilfredsstillende metoden ble utviklet , og mye tid ble viet til undersøkelse og utvikling av en metode i forkant av noe det er da i bruk. Det ble besluttet å ta i bruk systemet av flere spenning som den mest robust og bedre tilpasset behovene til verkstedet . Motorer har en variabel hastighet på 1? Til 6 , er tidsintervallet utføres under anvendelse av en spenning på minst 60 og høyst 250 , med mellomliggende spenninger på 80 , 110, 140 og 190 . Det har vært vanlig arrangement av motorer med variabel hastighet for anvendelse som tannhjul som svarer til de forskjellige spenninger uten avsetning for å oppdele forskyvning av spenning til en annen . Med denne bestemmelsen feilene kjegler og belte lagdelt ordninger ble beholdt . Corliss Motor Co Brown Gruppe Forge rom , maskinrom , kjeler , damp for maskinverksted og gassmotorer  (Sep 18, 2013 | post #1)