. Railway mechanical engineer . lOlh notch 4SnRH. 6th notch t4ChestpressureL 140Sapplypipe pressure Zlchestprrssun. l4SSoppl!/pipe pn. Typical Indicator Cards from an Engine Equipped with the RipkenDrifting Valve connected by piping to the exhaust chamber of the loco-motive. When the main throttle is closed the pressure on topof the differential piston B falls and the compression in thecylinders acting on the bottom of the valve being in excessof the steam chest pressure raises the valve B off theshoulder /, upon which it normally rests, placing the portK in communication with port D.
. Railway mechanical engineer . lOlh notch 4SnRH. 6th notch t4ChestpressureL 140Sapplypipe pressure Zlchestprrssun. l4SSoppl!/pipe pn. Typical Indicator Cards from an Engine Equipped with the RipkenDrifting Valve connected by piping to the exhaust chamber of the loco-motive. When the main throttle is closed the pressure on topof the differential piston B falls and the compression in thecylinders acting on the bottom of the valve being in excessof the steam chest pressure raises the valve B off theshoulder /, upon which it normally rests, placing the portK in communication with port D. This permits steam toflow through the valve into the steam chest maintaining therequired pressure to prevent a vacuum while drifting. Theraising of the valve also uncovers port E and the steamentering the annular cavity under the valve is restrictedby the port H and furnishes the counter pressure necessaryto hold ports D and K in communication until the engineis almost at a standstill. As the speed decreases the pres-sure in the steam chest will rise, and overcoming the pres-sure on the bottom of the differential valve, will force theva
Size: 2545px × 982px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
