By Herman Haeder
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Extra 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
Example. An engine with piston 15|" diameter, stroke 27J", p = 103 Ibs. per square inch, P = 20064 Ibs. , or 340600 inch Ibs. + 20064 x "6 x 13'75) The stress on the metal may be taken as k = 9960 per square inch, this gives the resistance moment W= -1
The Lubrication efficient of Bearings is of great importance, and means should always be provided for supply and distribution of the oil or other lubricant. Figs. 136, 137, give a section through the crank-shaft bearing of an en- gine used for driving a rolling mill. The lubricant is a stiff grease, and is delivered into the bearing by six pistons of gas tube, shown in the 136 in their respective fig. holes in the cap from these the grease is forced by the weight of the pistons into ; channels formed at the joints of the different parts of the The brass.
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.