The Marine Steam Engine: A Treatise for the Use of Engineering Students and Officers of the Royal Navy |
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Page 159
... ports , passages , & c . In ordinary cases the reduction of pressure due to this cause may be taken to be about one- twelfth of the absolute pressure of the steam in the boilers . During admission the steam passes into the cylinder at ...
... ports , passages , & c . In ordinary cases the reduction of pressure due to this cause may be taken to be about one- twelfth of the absolute pressure of the steam in the boilers . During admission the steam passes into the cylinder at ...
Page 160
... ports by the valve . The expansion of the steam in the cylinder now com- mences , and the piston is pressed forward by the expansive force of the steam , the pressure continually diminishing as the piston moves onward to the end of the ...
... ports by the valve . The expansion of the steam in the cylinder now com- mences , and the piston is pressed forward by the expansive force of the steam , the pressure continually diminishing as the piston moves onward to the end of the ...
Page 221
... ports , so that a comparatively large area is opened for the passage of steam , by a small movement of the valve . FIG . 65 . This kind of valve was much used in marine engineering , especially in cases where the steam pressure did not ...
... ports , so that a comparatively large area is opened for the passage of steam , by a small movement of the valve . FIG . 65 . This kind of valve was much used in marine engineering , especially in cases where the steam pressure did not ...
Page 225
... are shown in Fig . 68. The steam from the steam - pipe enters the expansion valve casing , and when the valve is in such a position that the ports are open , the steam passes REGULATING AND EXPANSION VALVES AND GEAR . 225.
... are shown in Fig . 68. The steam from the steam - pipe enters the expansion valve casing , and when the valve is in such a position that the ports are open , the steam passes REGULATING AND EXPANSION VALVES AND GEAR . 225.
Page 226
... ports are open , the steam passes into the slide - valve casing underneath . When the valve is in its middle position all the ports are wide open . A great number of ports are desirable , so that the amount of open- ing may be ...
... ports are open , the steam passes into the slide - valve casing underneath . When the valve is in its middle position all the ports are wide open . A great number of ports are desirable , so that the amount of open- ing may be ...
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Common terms and phrases
absolute pressure action air-pump angle arrangement atmosphere back pressure bilge blades brass cause centre coal cocks combustion compound engine connected crank crank-shaft curve diameter draught eccentric efficiency evaporation exhaust expansion valve Fahr feed feed-water feet fitted friction funnel furnaces gases gear gun-metal heating surface high-pressure cylinder hot-well hydrometer increased indicated horse-power indicator diagrams iron jacket Kingston valves latent heat length low-pressure cylinders machinery marine boilers marine engines metal motion necessary ordinary orifice paddle-wheel pass pipes piston plates port pounds per square pressure of steam prevent propeller pumps quantity rates of expansion reduced revolutions per minute Royal Navy safety-valves screw screw-propeller sea-water sensible heat shaft ship shown in Fig side slide slide-valve speed square inch steam pressure steam-pipes steel stokeholds stroke suction suitable superheated superheater surface condensers temperature thermal units total heat triple expansion engines tubes vertical weight
Popular passages
Page 32 - ... the quantity of heat necessary to raise the temperature of one pound of water at its maximum density, one degree Fahr., can be made to perform work equal to the raising of 772 Ibs.