All About Engines
Forfatter: Edward Cressy
År: 1918
Forlag: Cassell and Company, LTD
Sted: London, New York, Toronto and Melbourne
Sider: 352
UDK: 621 1
With a coloured Frontispiece, and 182 halftone Illustrations and Diagrams.
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Steam Turbines 163
small rod g is held in position in a hole in the shaft
by a spring. As this rod has its centre of gravity
a little nearer to the top of the diagram than the
centre of the shaft, it tends to fly out when the
shait is rotating. For normal speeds this is pre-
vented by the spring; but if the speed becomes
ex c essive
the rounded
end of the
rod projects
beyond the
surface of
the shaft
and presses
upon the
small lever
Q, releasing
the trip
lever a.
How the re-
lease of this
trip lever closes the governor valve will be seen
irom Fig. 98.
The position of the oil pump is also shown on
97- It is situated in the oil well into which all
the oil used for lubrication drains, and from which
it is pumped to the bearings and other parts requir-
ing lubrication. A bevel wheel on the end of the
spindle which drives the governor serves to drive
the pump. It is worth noting that no oil is used
inside the casing of a turbine, so that no oil becomes