Engineering Wonders of the World
Volume I
År: 1945
Serie: Engineering Wonders of the World
Sider: 448
UDK: 600 Eng -gl.
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32
ENGINEERING WONDERS OF THE WORLD.
Fig. 4.—A YARROW WATER-TUBE BOILER, CAPABLE
OF DEVELOPING 1,500 H.P.
{Photo, Messrs. Yarroio and Company, Limited, London.)
the back of each furnace is fitted a combustion
chamber, d. Here takes place the combus-
tion of the gases given off by the burning fuel.
From the combustion chamber the heated
gases pass through the tubes e, giving up
heat to the surrounding water during their
passage, and are then led through the smoke-
box f to the funnel. The upper portion of
the boiler is filled by the steam, which is
drawn off to the engine by the main stop-
valve H.
The first water-tube boiler to receive exten-
sive application was the Belleville, which was
introduced into the French navy in 1879, and
came into more or less gen-
eral use for British warships
tube Boiler. _ . . .
about 1893. Its introduction
for the latter did not escape criticism, with
the result that in 1900 a committee was ap-
pointed to investigate the matter thoroughly,
and to decide upon the best type of boiler
for naval purposes. After four years of
careful research and study, the committee
reported in favour of the water-tube boiler,
and stated that two types—namely, the
Yarrow and the Babcock and Wilcox—
were the most suitable for use in battle-
ships and cruisers.
The Yarrow boiler is illustrated in Fig. 4.
The cylindrical steam and water chamber at
the top of the boiler is connected by two series
of inclined tubes, giving the heating surface,
to two lower water chambers.
In the case of the Babcock and Wilcox
boiler, illustrated in Figs. 5 and 6, the straight
sloping water-tubes connect sinuous water-
boxes, which are in turn connected to a cylin-
drical upper chamber half filled with water, the
remaining space being occupied by the steam.
The firing arrangements are clearly shown in
the illustrations. Other types of water-tube
Fig. 5.—A BABCOCK AND WILCOX MARINE TYPE
WATER-TUBE BOILER, AS INSTALLED IN II.M. NAVY.
View with casing removed to show furnace f, water-
tubes t, and main drum d.
'{Photo, Messrs. Babcock and Wilcox, Limited.)