Locomotive Engine Running and Management: A Treatise on Locomotive Engines ...J. Wiley & Sons, 1890 - 416 σελίδες |
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adjusted air-brake air-pump applied back end back pressure block blow boiler brake-cylinder brake-pipe brakes brasses break broken burning carbon carbonic acid cars cause center line close coal combustion compound locomotive compression connecting rod connections crank crank-pin cross-head cut-off cylinder defect diaphragm distance driving-box eccentric-rod pin effect engine equal exhaust fire fire-box fireman flues forward eccentric fuel full gear full stroke gases half stroke heat inches injector inside lap lead opening length lever line of motion link-motion locomotive lower rocker-arm main reservoir main rod miles moving Norris Locomotive notch nozzles operation oxygen pass pipe piston point F port position pounds prevent pull pump radius rail railroad reduced release reverse-lever reversing revolutions per minute road rocker rocker-pin seat shown in Fig side rods slide-valve slip smoke-box speed stack steam steam-chest steam-port stop throttle throw tion train train-pipe tram valve valve-motion valve-stem wedges wheels
Δημοφιλή αποσπάσματα
Σελίδα 335 - The amount of heat necessary to raise the temperature of one pound of water one degree Fahrenheit is nearly constant throughout the interval between 32 and 212°F.
Σελίδα 301 - This is easily accomplished by running the pump at a good speed, so that the main reservoir will accumulate a high pressure while the brakes are on. When, after using the brake some time, the pressure has been reduced to sixty pounds, the train pipes and reservoirs should be recharged as much as possible before the speed has increased to the maximum allowed. A greater time for recharging is obtained by considerably reducing the speed of the train just before recharging and by taking advantage of...
Σελίδα 300 - In no case should the reduction in the brake-pipe for closing the leakagegrooves be less than four or five pounds, which will move all pistons out so that the brake-shoes will be only slightly bearing against the wheels. After this first reduction the pressure can be reduced to suit the circumstances. On a long train, if the three-way cock be opened suddenly, and then quickly closed, the pressure in the brake-pipe, as indicated by the gauge, will be suddenly and considerably reduced on the engine,...
Σελίδα 300 - ... to the steam pressure getting low, or from the stopping of the pump, or from a leakage in some of the pipes when one or more cars are detached for switching purposes, and that in consequence it has been found absolutely necessary to provide each brake cylinder with what is called a leakage groove, which permits a slight pressure to escape without moving the piston, thus preventing the application of the brakes when the pressure is slowly reduced, as would result from any of the above causes.
Σελίδα 300 - The brakes, as has been explained, are applied when the pressure in the brake-pipe is suddenly reduced, and released when the pressure is restored. It is of very great importance that every engineer should bear in mind that the air pressure may sometimes reduce slowly, owing to the steam pressure getting low, or from the stopping of the pump, or from a leakage in some of the pipes when one or more cars are detached for switching purposes, and that in consequence it has been found absolutely necessary...
Σελίδα 299 - ... past the piston. If, however, the brakes are applied in the usual manner the piston will be moved forward, notwithstanding the slight leak, and will cover the groove. It is very important that the groove shall be of the dimensions given. The triple-valve should be drained occasionally of any moisture that may accumulate, by the removal of the bottom plug. In an
Σελίδα 342 - ... coke, or in the firing of anthracite coal burning engines. Anthracite burns more slowly than bituminous coal, and consequently a larger grate area has to be provided, in order that sufficient coal may be burned to keep up the steam required. As cylinders of a given size draw from the boiler the same volume of steam per minute, no matter what kind of coal is used, and as soft coal which burns freely produces about the same quantity of steam per pound consumed as anthracite which burns slowly,...
Σελίδα 255 - B as a center and a radius equal to the length of the side EF, draw arc 2, intersecting arc 1 at H.
Σελίδα 296 - B, and carrying with it a slide-valve, 6. Air enters from the main pipe through the four-way cock 13 into the drain-cup A, and passes to the chamber B, forcing the piston up, and uncovering a small feeding-groove in the upper part of the chamber, which permits air to flow past the piston into the auxiliary reservoir, while, at the same time, there is an open communication from the brake-cylinder to the atmosphere, through the passages d, e, f, and g. Air will continue to flow into the auxiliary reservoir...
Σελίδα 1 - ... the nearest approach to perfection in an engineer is the man who can work the engine so as to develop its best capabilities at the least cost...