By Herman Haeder
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Additional info for A Handbook On the Steam Engine: With Special Reference to Small and Medium-Sized Engines ; for the Use of Engine Makers, Mechanical Draughtsmen, Engineering Students, and Users of Steam Power
82. Fig 81. for Girder 29 Frames (Figs. 7982). 80 DETAILS OF STEAM ENGINES. FRAMES FOR MEDIUM AND LARGE ENGINES. ft 6C 31 DETAILS OF STEAM ENGINES. 32 Frames for Horizontal Engines with more than One Cylinder. Figs. 87, 88 show a frame for a double cylinder engine with fly-wheel between the two cylinders. A very convenient and cheap type for small self-contained engines. The size of the fly-wheel is limited in this arrangement to about three and a half times the crank radius. Figs. 87 and 88. Fics.
R let jars. i = P = d I p = v = diameter of journal in inches. length of journal in inches. speed in revolutions per minute. total pressure in Ibs. pressure per square inch in Ibs. periphery speed of the journal in feet per second, then, for ordinary engines : p < 270 p ; v ^ 840. figures do not give the limit to which the pressure and speed may be carried, the table gives some examples taken from engines which have been running for some years. These CRANK SHAFT BEARINGS. TABLE 9. Examples of Main Bearings from Actual Practice.
102 and 1P3. Figs. 162, 163, show an arrangement for applying the balance weights to the cheeks of an ordinary slotted-out crank. CRANKS, CRANK DISCS, AND CEANK SHAFTS. Figs. 164 and 49 105. a wrought-iron or steel crank, with the crank Figs. 164, 165, show this type is much used for pin free in one side of the crank paddle engines, the engine crank shaft being separate from the paddle-wheel shafts, the latter being driven by the crank pin as shown, the left crank being on the engine shaft, the right-hand one ; on the paddle-wheel shaft.