A Textbook on Steam Engineering ...International Textbook Company, 1902 |
Términos y frases comunes
adjustment air pump angle of advance bearing boiler brasses center line centrifugal force circulating pump closed compound engine compression condensing water connected connecting-rod cooling Corliss Corliss valve crank crankpin crosshead cut-off valve dashpot diagram diameter direction distance eccen eccentric center eccentric rod equal exhaust steam exhaust valve feedwater fitted heat high-pressure cylinder horsepower hotwell increase indicator diagram injection water jet condenser lead length lever link motion live steam load low-pressure cylinder lubricator main valve mean effective pressure move non-condensing operation pendulum governor piston rod piston valve pivoted point of cut-off poppet valve position ratio of expansion reheater release resistance reversing revolutions per minute rotation seat shifted shown in Fig slide valve spring square inches steam chest steam pipe steam port steam valve stroke surface condenser tandem compound temperature throttle tion tubes vacuum valve gear valve stem vapor weight wristplate
Pasajes populares
Página 33 - Two bodies cannot occupy the same space at the same time. The sovereignty of the Church and that of the United States cannot both exist.
Página 18 - ... must always be the same as that of the hands of a watch ; motion in the opposite direction will move the wheel in the wrong direction and give a negative reading for the area. When measuring diagrams with loops, like Fig.
Página 34 - CYLINDER. 94. Pounding often occurs in the cylinders and is frequently caused by water, due to condensation or carried over from the boilers. This may be a warning that priming is likely to occur in the boilers or has already commenced. The first thing to do at such" a time, if the cylinders are not fitted with automatic relief valves, is to open the drain cocks as quickly as possible and to close down the throttle a little to check the priming. If boilers show a chronic tendency to prime, it is...
Página 8 - ... pounds per square inch, and if the area of the piston is 100 square inches and the absolute pressure of the steam 100 pounds per square inch, the net pressure on the piston in Fig.
Página 36 - Divide the continued product of the mean effective pressure in pounds per square inch, the length of the stroke in feet, the area of the piston in square inches, and the number of strokes per minute, by 33,000 ; the result will be the horsepower.
Página 26 - BWG in thickness, and are spaced jf inch between centers. They should be carefully tinned within and without, and when they are 6 feet or over in length, they should be supported by one or more supporting plates. The tube-sheet should be 1 inch thick and made of the...
Página 45 - HISTORICAL. 1. In 1781 Jonathan Hornblower constructed and patented an engine, similar to the present "compound," that had two cylinders of different sizes. Steam was first admitted into the smaller cylinder and then passed over into the larger, doing work on a piston in each. In Hornblower's engine the two cylinders were placed side by side, and both pistons acted on the same end of a beam overhead. The use of this early compound engine was abandoned on account of the suit brought by a Birmingham...
Página 32 - This filling consists of layers of cylindrical tubular tiling c, c', c", which rest upon a grating d supported by a brick wall e extending around the circumference of the tower. The warm discharge water from the condenser enters the tower through the pipe/, passes up the central pipe g, and is delivered on the upper layer of tiling and over the whole cross-section of the tower by the distributing device h, which consists of four pipes, radiating from the central pipe g, which are caused to revolve...
Página 31 - To find the piston speed of an engine, multiply the stroke in inches by the number of revolutions per minute and divide the product by 6. EXAMPLE. — An engine with a 52-inch stroke runs at a speed of 66 revolutions per minute.
Página 35 - end on" between the piston and cylinder head, which it surely will sooner or later, either the piston or the cylinder head is bound to be broken. Therefore, if there is any intimation that a follower bolt is adrift in the cylinder, shut down the engine instantly, take off the cylinder head, remove the old bolt, and put in one having a tighter fit. BROKEN PISTON PACKING. 98. Broken packing rings and broken piston springs will cause a great noise in the cylinder, but it is more of a rattling than a...