. American engineer and railroad journal . Thecylinders are 43,3 in. in diameter and in. stroke ; thevalve-gear is the Meyer adjustable cut-off. The cranks onthe main shaft are set at right angles. In addition to thecut-off valves, the steam pressure can be closely regulatedby the engineer, a lever conveniently placed working avalve in the main steam-pipe. Vol. LXVI. No. 8.] ENGINEERING JOURNAL. 71 The high-pressure pump is 5 5 in. in diameter, and thepUinfjer has a stroke of 43-3 • Ordinarily this pump isrun at tlie rate of 20 strokes per minute when the press isat work. The .iccumu
. American engineer and railroad journal . Thecylinders are 43,3 in. in diameter and in. stroke ; thevalve-gear is the Meyer adjustable cut-off. The cranks onthe main shaft are set at right angles. In addition to thecut-off valves, the steam pressure can be closely regulatedby the engineer, a lever conveniently placed working avalve in the main steam-pipe. Vol. LXVI. No. 8.] ENGINEERING JOURNAL. 71 The high-pressure pump is 5 5 in. in diameter, and thepUinfjer has a stroke of 43-3 • Ordinarily this pump isrun at tlie rate of 20 strokes per minute when the press isat work. The .iccumulator is rectangular in form, and is of heavysteel plates and angles ; it is 9 ft. X 12 ft- in size and 16 ft. Water is forced into the lifting cylinders with a pres-sure of 710 lbs. per square inch. The forging press is placed in a buildmg erected for it ;this building is entirely of iron, and 177 ft. long and 72 , with a clear height of ft. uniler the roof heating furnaces are placed at one side of this build-. 1 . _ t 1 1 ^ ^^ m 1 - :: H il ■.:.--. 1 - d , • -^ 1r ■ 1 - , 1 ; ^ — J ! — j -H -- - ^. ; ir ^ K _ 1 ■ ■^ < )^ 8 p 1 1 f- Fig. 4. 11 .1 HYDRAULICFORGING PRESS. ft. high, and is loaded to a weight of 180 tons. It is solid-ly joined to three plungers, each in. in diameter andhaving a stroke of in- These pistons work in heavycylinders of cast steel set in a bed-plate prepared for an arrangement of two valves the water from the pumpscan be turned into one of these cylinders alone, into twoof them, or into all three at once. In this way the pressureon the main cylinder of the press, and consequently on theram, can be made 2,075 lbs., 3,110 lbs., or 6,220 lbs. persquare inch, as three, two, or one of the accumulator cyl-inders may be in use. With such enormous pressures, it will readily be under-stood that all the connections had to be made very heavy,and the greatest care exercised in packing. The piston ofthe
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
