SLUICING MACHINERY.
529
Sluicing Machinery. — The penstocks or cloughs which regulate levelhng
and sluicing culverts may be worked either by the chain or the ram. The
former method is more usual with electrical, the latter with hydraulic,
power.
The cloughs and their electrical connections at Ymuiden Looks are
illustrated in figs. 528 to 530. Each frame (which is built of timber and
sheet metal) is suspended by two endless chains fixed to the ends of a
pivoted yoke at the top of the frame, and resting on a horizontal shaft
above, through which they receive their motion before being carried round
a secondary winding shaft half-way down the pit. The shaft is actuated
by an electric motor situated in a separate chamber behind a partition
Automatie.
Pilot Motor
Fig. 530. —Diagram of Electric Connections to Gates and Sluices at Ymuiden Locks.
wall through which the shaft is carried. The motor is capable of developing
17 H.P. when running at 270 revolutions. The weight of the sluice is
partly balanced by a counterweight, which is attached to the chain end
and which glides on two rods provided with collars bearing against strong
helical springs.*
In the hydraulic clough the frame terminates in a piston, which passes
into a cylinder and is worked by differential pressure. Vertical guides
are added to keep the frame in position during its ascent or descent.
In case of failure of any part of the mechanical apparatus, it is advisable
to provide a separate clough which can be worked by manual power. This
is usually effected by a cross-bar at the sunimit of a spindle, with screw
thread, passing through a fixed bracket.
* Articles on “The Electrical Gear at the Ymuiden Locks ” appeared in Engineering,
Feb. 7, 1902, and subséquent issues.
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