The Walschaert and Other Modern Radial Valve Gears for Locomotives: A Practical Treatise on the Locomitive Valve Actuating Mechanism Invented by Egide Walschaerts, with the History of Its Development and Its Evolution Into the Mechanically Correct Locomotive Valve Gear of the Present Day ... |
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Сторінка 17
... this connecting cylinder is usually made hollow in order that the pressure
against the outer ends of the pistons will be held in perfect equalization and the
valve be thereby more uniformly balanced ; in some cases , however , the
opening ...
... this connecting cylinder is usually made hollow in order that the pressure
against the outer ends of the pistons will be held in perfect equalization and the
valve be thereby more uniformly balanced ; in some cases , however , the
opening ...
Сторінка 24
Besides having no power to turn the wheel when the main - pin is on the dead -
centre regardless of how much pressure is in the cylinder , the other reason for
the engine not starting promptly , even when assistance should be given by ...
Besides having no power to turn the wheel when the main - pin is on the dead -
centre regardless of how much pressure is in the cylinder , the other reason for
the engine not starting promptly , even when assistance should be given by ...
Сторінка 57
... of the steam pressures against the valve pistons being less perfect on account
of the lessened area exposed to the live steam pressure on the back valve piston
, due to the entrance of the valve - stem at that end of the steam chest .
... of the steam pressures against the valve pistons being less perfect on account
of the lessened area exposed to the live steam pressure on the back valve piston
, due to the entrance of the valve - stem at that end of the steam chest .
Сторінка 59
An unbalanced D - slide valve does have an enormous frictional resistance to
movement on its seat due to the great area on top of it being exposed to the full
pressure of live steam , but very few of such valves are in existence to - day , and
...
An unbalanced D - slide valve does have an enormous frictional resistance to
movement on its seat due to the great area on top of it being exposed to the full
pressure of live steam , but very few of such valves are in existence to - day , and
...
Сторінка 60
... and they fit looser as they wear ; the live steam against the rings will go either
under or over them : If the steam passes between the rings and the walls of the
valve chest there will be bad blow , and waste of pressure , , -no packing .
... and they fit looser as they wear ; the live steam against the rings will go either
under or over them : If the steam passes between the rings and the walls of the
valve chest there will be bad blow , and waste of pressure , , -no packing .
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action admission port admission valves advance ahead American amount angle axle backward balanced block Brake broken built carried cause centre combination lever common compression connection correct cover crank crosshead cut-off cylinder dead diagrams direction disconnected distance eccentric rod effect engine equal equipped exactly exhaust forward frame front fulcrum give given hole illustrated inches inside admission lead length link motion link-block locomotive lower end main rod main-pin mechanism method moved movement necessary notch obtained opening opposite piece piston placed position pounds practical pressure quarter question radius rod reason received reference remove represented reverse lever road secure shaft short shortened shown side steam Stephenson link stroke tion train transmission turning valve motion valve rod valve-stem vertical Walschaert gear Walschaert valve gear weight wheel