The Marine Steam Engine: A Treatise for the Use of Engineering Students and Officers of the Royal Navy |
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Page 110
... springs is shown in Figs . 43 and 44. The direct loaded spring valve has been chosen for illustration , as it is now the most generally adopted for marine boilers . The general 110 THE MARINE STEAM - ENGINE .
... springs is shown in Figs . 43 and 44. The direct loaded spring valve has been chosen for illustration , as it is now the most generally adopted for marine boilers . The general 110 THE MARINE STEAM - ENGINE .
Page 111
... springs of sufficient force to just resist the maximum working pressure of the boiler . When the steam pressure exceeds this , it opens the valves and escapes to the atmosphere through an orifice in the side or end of the box , to which ...
... springs of sufficient force to just resist the maximum working pressure of the boiler . When the steam pressure exceeds this , it opens the valves and escapes to the atmosphere through an orifice in the side or end of the box , to which ...
Page 112
... spring . This was the most difficult point to be overcome in the introduction of spring - loaded safety - valves . The difficulty has , however , been practically surmounted by employing springs of sufficient length and diameter to give ...
... spring . This was the most difficult point to be overcome in the introduction of spring - loaded safety - valves . The difficulty has , however , been practically surmounted by employing springs of sufficient length and diameter to give ...
Page 113
... springs are made is to be found by the following formula : - where 3 d = ' W x D C ; W = load on the spring in pounds . D = diameter of the spring , from centre to centre of the wire , in inches . d = inches . diameter , or side of ...
... springs are made is to be found by the following formula : - where 3 d = ' W x D C ; W = load on the spring in pounds . D = diameter of the spring , from centre to centre of the wire , in inches . d = inches . diameter , or side of ...
Page 116
... springs , before they are passed , have to undergo the following practical tests as to their strength and elasticity . The spring is first compressed by a load equal to the area of the valve , multiplied by the maximum working pressure ...
... springs , before they are passed , have to undergo the following practical tests as to their strength and elasticity . The spring is first compressed by a load equal to the area of the valve , multiplied by the maximum working pressure ...
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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.