. The railroad and engineering journal . 96 28,176 Bituminous 13 89,356 119 74,743 Total 284 132,408 173 115,672 This shows an increase of ii furnaces and of 16,736 tonsweekly capacity this year over last year. Vol. LXIII, No. S.] ENGINEERING JOURNAL. 385 The Willans TripIe-ExpansionEngine. Fig. 2 Fig. 3 (From the London Engineer.) The accompanying illustrations show a triple-expansion engineon a new plan, constructed by Messrs. Willans & Robinson, ofThames-Ditton, England. The particular engine illustrated isone of 40 indicated , and was built to run a pumping en-gine. Fig. I shows on a
. The railroad and engineering journal . 96 28,176 Bituminous 13 89,356 119 74,743 Total 284 132,408 173 115,672 This shows an increase of ii furnaces and of 16,736 tonsweekly capacity this year over last year. Vol. LXIII, No. S.] ENGINEERING JOURNAL. 385 The Willans TripIe-ExpansionEngine. Fig. 2 Fig. 3 (From the London Engineer.) The accompanying illustrations show a triple-expansion engineon a new plan, constructed by Messrs. Willans & Robinson, ofThames-Ditton, England. The particular engine illustrated isone of 40 indicated , and was built to run a pumping en-gine. Fig. I shows on a small scale the engine as mounted inconnection with a centrifugal pump ; fig. 2 is a section throughthe engine showing its construction, and fig. 3 is a view of thepiston-valve removed from its seat. This engine is intended as a high-speed engine, and has runat from 450 to 550 revolutions per minute. The engines aresingle-acting—that is, steam acts upon the piston only duringthe down-stroke, the upstroke being made by the momentum. of the fly-wheel against an air-cushion in the lowest arrangement, it is claimed, renders high speed not onlypracticable, but also makes a very easy-running and durableengme, small ones of this pattern having been run for over twoyears with almost unappreciable wear on the bearings crank-shaft revolves in a chamber filled to a certain ristow ahoYnv at \ stroke- dcwn-, taking sluarv. height with lubricant—mixed water and oil—and splashes it inthe form of a constant fine spray over the connecting-rods andmovable parts ; the lubrication is thus automatic, and the mainbearings are continuously flooded with oil. In practice it isfound that a very small amount of lubricant is sufficient. A fulldescription of the engine is given below. Fig. 2 gives a section through one of the 40 indicated 386 THE RAILROAD AND [August, i88g. 1 engines on ascaleof The engine isarrangetlwiih the high-pressure cylinder above
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
