Marine Boiler Management and ConstructionLongmans, Green, and Company, 1901 - 404 páginas |
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Página 8
... of fire bars at their centres . 7 stands for length of fire bars . C1 , C2 , C3 are constants . Q is consumption of coal per square foot per hour . Values of the Products n.t.d. ( This is the smallest 8 BOILER MANAGEMENT.
... of fire bars at their centres . 7 stands for length of fire bars . C1 , C2 , C3 are constants . Q is consumption of coal per square foot per hour . Values of the Products n.t.d. ( This is the smallest 8 BOILER MANAGEMENT.
Página 9
... centres , then the sectional areas below and above these lines are 3 sq . ft . in the one furnace and 6.3 sq . ft . in the other . With five bars which are 3 ins . deep , the ashpit areas are reduced to 2-3 and 53 sq . ft . respectively ...
... centres , then the sectional areas below and above these lines are 3 sq . ft . in the one furnace and 6.3 sq . ft . in the other . With five bars which are 3 ins . deep , the ashpit areas are reduced to 2-3 and 53 sq . ft . respectively ...
Página 10
... centre of the bars , which remain covered with compara- tively cool fuel or ashes , and are therefore not exposed to so much heat as the narrower bars with wide air spaces . An attempt to indi- cate this difference is shown in figs . 8 ...
... centre of the bars , which remain covered with compara- tively cool fuel or ashes , and are therefore not exposed to so much heat as the narrower bars with wide air spaces . An attempt to indi- cate this difference is shown in figs . 8 ...
Página 11
... centre , and vice versa , and a section across the grate might have the appearance of fig . 11 , with the FIG . 10 FIG . 11 inevitable result that the tops of the projecting bars would be quickly burnt away . Possibly this may lead to ...
... centre , and vice versa , and a section across the grate might have the appearance of fig . 11 , with the FIG . 10 FIG . 11 inevitable result that the tops of the projecting bars would be quickly burnt away . Possibly this may lead to ...
Página 13
... centres ; they prevent excessive distortions . The bars are also made decidedly taper , 1 in . to 1 in . per foot of depth , so that the fuel cannot be jammed between them , which would certainly happen if they were parallel and loosely ...
... centres ; they prevent excessive distortions . The bars are also made decidedly taper , 1 in . to 1 in . per foot of depth , so that the fuel cannot be jammed between them , which would certainly happen if they were parallel and loosely ...
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Términos y frases comunes
acid angle annealing bars bending Board of Trade boiler shell bolts carbon carbonic acid caulking centre circumference circumferential seams cocks combustion chamber compression stress corners corrugated crack Crown 8vo cylindrical D. K. Clark diameter Double nuts drilled edge elastic limit elongation end plates Ends Riveted Stay Engineering Enging experiments factor of safety fire fitted flame flange flat plates fuel funnel gases girder hammer heating surface hydraulic Illustrations iron plates lap joints length Lloyd's Register load longitudinal seams machine material metal percentage pipes pitch placed Plain punched reduced rivet holes rows screwed stays sectional area shearing stress shell plates shown in fig side square foot square inch Stay Ends Nutted Stay Ends Riveted stay tubes steam space steel Strength of Materials superheaters Surveyor temperature tensile strength tension test piece thickness of plate threads tons tube plate washers water spaces water-tube boilers weight welded
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