Re-volv′ing-cyl′in-der steam-en′gine.
One whose cylinder is mounted on trunnions and is caused to rotate by the reciprocation of the piston, in contradistinction to the rotary engine, in which the pistons rotate on an axis within a steam drum.
The sectional view (
Fig. 4297) exhibits an engine of this class, having a fly-wheel
A with two cylinders
D D rigidly attached to it and placed opposite each other in a radial line.
These cylinders have a common pistonrod, which is attached at its center to a crank-pin in such a manner that every revolution of the flywheel
A caused by the action of the steam in the cylinders produces two revolutions of the crank.
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Revolving-cylinder steam-engine. |
The stationary disk-valve
I, with ports
d d′ and grooves
f f, and pipes or channels
c c′, control the admission and exhaust of steam.
In
Scott and
Morton's steam-engine (
Fig. 4298), the cylinder
a is mounted on trunnions
c d, and the piston-rod
b is connected to a wrist-pin on the flywheel
f. The trunnion
c is journaled eccentrically in the hub of the fly-wheel, so that each revolves independently on its own axis.
Previous to starting the engine, the piston is placed at half-stroke on one side of the fly-wheel center.
Steam is admitted to and exhausted from the cylinder through ports in the trunnion
d. e is the steam-chest.
The valve motion is controlled by the lever
g, by which the engine is started or reversed, and by moving it back or forth on the arc
h the lap of the valve is changed.
In
Kipp's revolving-engines the exterior cylinder, to which a belt may be directly applied, it being surrounded by a lagging for that purpose, is caused to rotate by the reciprocation of two pistons with duplicate heads in cylinders whose axes are at right angles to each other.
The piston-heads
a a′ are con-
[
1931]
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Revolving steam-engine. |
nected, as are also
b b′, by the pieces
r c c′ c′. Yokes
d d′ connect these with a crank
e on the main shaft of the trunk.
Steam is
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Kipp's revolving-engine (perspective view). |
admitted through the valve
f to the central space
g, which serves as a steam-chest.
The arrangement of the ports is shown at
i. The drum is mounted on trunnions, through one of which the steam enters, the other serving to exhaust through one of the hollow pillars
k into the feed-water heater
l; an eccentric on the main shaft also operates the feed-water pump.
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Kipp's revolving-engine (sections). |
In
Fig. 4301, the drum
C rotates in hearings, the steam passing in and out at the respective trunnions.
The cylinders oscillate in bearings in the heads of the drum, and revolve with it.
[
1932]
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Revolving-cylinder steam-engine. |
The reciprocating pistons are connected by cranks to planetary gears
H H, which mutually and severally engage a fixed sunwheel
I on the central axis.
Power is transmitted by a belt on the drum.
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Bruckner's revolving-furnace (perspective view). |
