. Steam engines, a thorough and practical presentation of modern steam engine practice . eexhaust ports leading from the ends of the steam chest direct to themain exhaust and closed by the reversing valves //. The piston C is driven by steam admitted under the slide valveG, which, as it is shifted backward and forward, alternately connectsopposite ends of the cylinder A with the live steam pipe and slide valve G is shifted by the auxiliary plunger F, the latterhaving hollow ends which are filled with steam, and this, issuingthrough a hole in each end, fills the spaces between it a
. Steam engines, a thorough and practical presentation of modern steam engine practice . eexhaust ports leading from the ends of the steam chest direct to themain exhaust and closed by the reversing valves //. The piston C is driven by steam admitted under the slide valveG, which, as it is shifted backward and forward, alternately connectsopposite ends of the cylinder A with the live steam pipe and slide valve G is shifted by the auxiliary plunger F, the latterhaving hollow ends which are filled with steam, and this, issuingthrough a hole in each end, fills the spaces between it and the headsof the steam chest in which it works. Pressure being equal at each 72 STEAM ENGINES end, this plunger F, under ordinary conditions, is balanced andmotionless; but when the main piston C has traveled far enough costrike and open the reverse valve I, the steam exhausts through theport E from behind that end of the plunger F, which immediatelyshifts accordingly and carries with it the slide valve G, thus revers-ing the pump. No matter how fast the piston may be traveling, it. Fig. 51. Section of Pump Cylinder Showing Valve Operated with Tappet must instantly reverse on touching the valve I. In its movementthe plunger F acts as a slide valve to close the port E and is cushionedon the confined steam between the ports and steam-chest reverse valves II are closed as soon as the piston C leaves themby a constant pressure of steam behind them conveyed direct fromthe steam chest through the ports shown by dotted lines. The motion of the piston C, Fig. 52, is transmitted through therod M to the water piston in the cylinder R. As the piston moves STEAM ENGINES 73 back and forth, water enters through the intake valves 0 and leavesthrough the discharge valves immediately above, and finally leavesthrough the delivery pipe P. In order to create a more continuousflow of water, an air chamber Q is provided. Any sudden variationin the pressure in the line is taken up largely
Size: 1635px × 1529px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteamen, bookyear1920
