Encyclopedia of Engineering: A Treatise on Boilers, Steam Engines, the Locomotive, Electricity, Machine Shop Practice, Air Brake Practice, Engineer's Catechism, Gas, Oil, Traction and Automobile Motors, Refrigeration, Etc., Etc, المجلد 6International School of Engineering, 1906 |
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عبارات ومصطلحات مألوفة
air brake valve air cylinder air-brake allow application chamber atmosphere automatic brake valve auxiliary pressure auxiliary reservoir black hand brake cylinder pressure brake pipe brake power Car Control Valve cause cavity Chart check valve compressed Control Valve cut-out cock diaphragm discharge valve distributing valve double check valve Dukesmith duplex emergency application emergency position engine brakes engineer's brake valve exhaust port feed valve force gasket graduating spring graduating valve handle high-speed brake inches lap position leak lever main piston main reservoir pressure main valve moved old style operation packing ring piston-travel plain triple port F pres pump governor receiving valves reducing valve release signal release the brakes reversing valve rotary valve running position safety valve service application seventy pounds signal pipe slide valve stem stop straight air brake tion train brakes Train Pipe trainpipe pressure triple piston triple valve valve seat Westinghouse York Brake Valve York pump
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الصفحة 100 - ... and as the atmospheric pressure is about fifteen pounds to the square inch, the receiving valve 33 is forced off its seat by the air rushing in to fill up the space created by. the partial vacuum, and if the piston was to stop when it reached the top, the valve would be seated by its own weight when the pressure inside and out of the cylinder equalized ; but as the piston reverses just as it reaches the top, the valve is forced to its seat and held there by the compression of the air on top of...
الصفحة 434 - This permits the pressure in the application chamber to escape ; therefore, as this pressure is being exhausted, brake-cylinder pressure in chamber b moves application piston 10 to the left, causing exhaust valve 16 to open exhaust ports e and d as shown in Fig.
الصفحة 74 - ... valve at the connection marked X. The handle (5) controls a plug (6) similar to the cut-out plug (13) in the plain triple. When the handle is turned as you see it in plate 8, port c through the plug is in register with port bb, and the air which comes from the triple exhaust is forced against the seat of the valve 4, which raises and allows the pressure to escape to the atmosphere through port d. As port d is controlled by valve 4, the air will exhaust only while this valve is up, and as the...
الصفحة 427 - Fig. 62 equalizing piston 26, graduating valve 28, and equalizing slide valve 31, are shown as actually constructed. But as there are ports in the valves which cannot thus be clearly indicated, the diagrammatic illustrations show each slide valve considerably elongated so as to make all the ports appear in one plane, with similar treatment of the equalizing valve seat.
الصفحة 463 - ... pressure control. It is supplied with air directly from the main reservoir. It regulates the pressure in the feed-valve pipe, and also the brake pipe in running and holding positions of the automatic brake valve as the latter then connects these two pipes. It is connected to a pipe bracket located in the piping between the main reservoir and the automatic brake valve, and is interchangeable with previous types. Figs.
الصفحة 125 - The rotary valve, the handle that controls the rotary, the equalizing discharge valve, and the feed valve attachment, or trainpipe governor. Of ' course there are gaskets, springs, packing rings, the equalizing reservoir, etc., but they are matters of detail. There are five positions in which the handle of the brake valve can be placed. The first, or extreme left position is "full release," and is the position the handle should always be in when releasing brakes, or when it becomes necessary to charge...
الصفحة 419 - When using the independent brake only, the handle of the automatic brake valve should be carried in running position. The independent application may be released by moving the independent-brake-valve handle to running position.
الصفحة 139 - ... in the slide valve seat that connects with feed port i, and as the slide valve does not move until the trainpipe is fully charged, it causes the pressure to be restored very quickly after it has been reduced from any cause. The reason the slide 'valve does not move until the pressure is restored is because the piston has no packing rings, and the air is allowed to circulate by it through a small passage that leads to the supply valve chamber, from which it passes under the cut-off valve across...
الصفحة 129 - ... is dovetailed or keyed into the top of the rotary, so that whatever way the handle is turned the rotary has to turn with it; 13 is a small leather gasket for the purpose of preventing any air from leaking out around the stem, as main reservoir pressure is always on top of the rotary and under the shoulder of stem 12, forcing it up against the casing. This gasket sometimes gets gummed up so badly that it causes the handle to move very hard; 14 is the rotary valve, and 3 is the rotary valve seat;...
الصفحة 440 - ... pipe, as before described. This action does not release the locomotive brakes because it does not discharge application-cylinder. pressure. The release pipe is closed by the rotary valve of the automatic brake valve, and the application-cylinder pipe is closed by the rotary valves of both brake valves. To release the locomotive brakes, the automatic brake valve must be moved to running position. The release pipe is then connected by the rotary valve to the atmosphere and, as exhaust cavity k...