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 16
... the admission port is opened , and the admission ports are opened outside of
either end of the valve while during the same time the other end of the cylinder is
discharging its exhausted steam through the cavity in the centre of the valve .
... the admission port is opened , and the admission ports are opened outside of
either end of the valve while during the same time the other end of the cylinder is
discharging its exhausted steam through the cavity in the centre of the valve .
Сторінка 23
... this engine could not move of its own volition , for two reasons : the valve being
centred , all ports are covered and no steam would be admitted to the cylinder ;
working singly , the engine would have to be " pinched , ” or moved off the centre
...
... this engine could not move of its own volition , for two reasons : the valve being
centred , all ports are covered and no steam would be admitted to the cylinder ;
working singly , the engine would have to be " pinched , ” or moved off the centre
...
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 25
... or overcome the outside lap , with outside admission valves we must lengthen
the return crank slightly , but still keeping eccentric pin E the same distance from
the hub centre . Now , we find that the eccentric is more than 90 degrees from the
...
... or overcome the outside lap , with outside admission valves we must lengthen
the return crank slightly , but still keeping eccentric pin E the same distance from
the hub centre . Now , we find that the eccentric is more than 90 degrees from the
...
Сторінка 26
... eccentric moves in one direction the valve travels in the opposite one ; to make
the engine still run forward the position of the eccentric is changed to a directly
opposite point on the wheel - right straight across , through the centre of the hub ...
... eccentric moves in one direction the valve travels in the opposite one ; to make
the engine still run forward the position of the eccentric is changed to a directly
opposite point on the wheel - right straight across , through the centre of the hub ...
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Загальні терміни та фрази
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