Elements of Steam EngineeringJ. Wiley & Sons, 1910 - 296 pagina's |
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Elements of Steam Engineering Henry Wilson Spangler,Arthur Maurice Greene,Stewart McCulloch Marshall Volledige weergave - 1910 |
Elements of Steam Engineering Henry Wilson Spangler,Arthur Maurice Greene,Stewart McCulloch Marshall Volledige weergave - 1910 |
Veelvoorkomende woorden en zinsdelen
allow amount angle of advance atmosphere attached Babbitt metal boiler bolted bottom brass called cast iron coal cock Compound Locomotive compression condenser connecting rod construction crank end crank pin cross head cylinder diagram diameter disc discharge driving drum eccentric rod engine equal exhaust lap expansion fire-box flanges flue fly wheel force frame friction gases gear governor heat high-pressure holes horse power inches increases injector joint lever load locomotive lower lubrication main valve metal mid position motion moved nozzle occurs passes pipe piston rod plate port opening pounds prevent reduced ring riveted screwed shaft shell shown in Fig shows side space speed spindle spring stays steam entering steam pressure Stephenson link motion stroke stuffing boxes superheater surface surface condenser temperature threads throttle tubes turbine turned upper vacuum vanes velocity water-tube boiler wrench
Populaire passages
Pagina 254 - Or approximately, it is the heat required to raise the temperature of one pound of water from 59 degrees Fahrenheit to 60 degrees Fahrenheit.
Pagina 195 - In the crank end of the cylinder the area of the piston is reduced by the area of the piston rod, and a for the crank end is, therefore, smaller than that for the head.
Pagina 169 - In this, a is the area of the port in square inches; A, the area of the piston in square inches; L, the stroke in feet, and N, the number of revolutions.
Pagina 199 - BHP — is. let us say, 10 or 15 per cent, less than the indicated horse power. The mechanical efficiency of the engine is the ratio of the brake horse power to the indicated horse power; thus when the losses are 10 or 15 per cent., the mechanical efficiency is 90 or 85 per cent. The efficiency of an engine, as well as its power, varies with the speed at which the engine is run. The efficiency is low at low speed and at very high speed...
Pagina 198 - Since the radius, or distance from the center of the shaft to the center of the crankpin, is 15 inches, the diameter of the circle it moves in is 15 inches X 2 = 30 inches = 2.5 feet.
Pagina 189 - OS, for instance, being the condition for a movement of the piston TQ. The expansion curves from many engines have been examined and have been found to agree quite closely with a curve called the rectangular hyperbola. This curve has the property that the product of the distances of any point from the line of zero pressure and from the line of zero volume is constant.
Pagina 85 - To keep the pressure of the steam constant he must move the damper, opening it when the pressure falls, or closing it when it rises. If more steam is required than a boiler is producing, the pressure will gradually fall, and, to prevent this, coal must be burned at a higher rate of combustion. This is accomplished by opening the damper and thus allowing more air to be drawn through the fire, consuming more coal. Should the demand for steam decrease, the steam pressure would rise and the damper would...
Pagina 103 - The amount of motion of the piston is called the stroke of the engine, and this is twice the distance from the center of the •crank-pin to the center of the shaft, which distance is called the crank radius, or the throw of the crank.