MAINTENANCE
The drum winch may have from one to four
horizontally mounted drums on which wire rope is
wound for raising, lowering, or pulling loads. The drum
The components of the torque sensor system are
winch may also include one of two gypsy heads. On
surprisingly rugged. Besides keeping the components
newer winches with only one gypsy head, the gypsy
clean and dry, the only maintenance that should be
head can be removed and reassembled on the opposite
required from ship's force personnel is preventive
end of the drum shaft. Drum winches maybe driven by
maintenance indicated in the ship's PMS system.
electric motors (ac or dc), an electrohydraulic drive,
steam, air, a gasoline engine, or by hand.
SUMMARY
The gypsy winch has one or two horizontally
mounted gypsy heads around which several turns of line
This section has introduced you to the operation of
must be taken to prevent slippage when a load is snaked
the torsionometer. For a more detailed description of
or hoisted. Gypsy winches are driven by electric motors
the operation and construction of the system, refer to the
(ac or dc), an electrohydraulic drive, steam, air, a
manufacturer's technical manual and NAVSEA
gasoline engine, or by hand.
SN521-AC-MMM-010.
Winches on numerous auxiliary ships are often
referred to as deck winches or cargo winches.
DECK EQUIPMENT
ANCHOR WINDLASSES
A good deal of the electrician's time aboard ship is
spent performing maintenance. Of the items being
Anchor windlasses are installed on board ship
maintained, deck equipment receives the most wear and
primarily for handling the chains used with anchors for
tear because of its intended use and location. Deck
anchoring the ship. In addition, most windlasses are
equipment must be in working condition for the ship to
provided with capstans or gypsy heads for handling
be able to perform its assigned mission effectively.
lines and for mooring and warping operations. Anchor
windlasses can be of two types--electric or
WINCHES
electric-hydraulic.
Winches installed aboard ship are used to heave in
Electric Anchor Windlasses
on mooring lines, hoist boats, lift booms, and handle
cargo. Winches are classified by the drive unit and the
Electric windlasses are powered by an electric
type of design, either drum or gypsy. Figure 5-20 shows
motor that drives a wildcat(s) and head(s) directly
a simplified representative winch, which is a
through suitable reduction gearing. The electric power
combination of a drum and gypsy type of winch.
for the motor is either ac or dc.
Cargo ships, transports, and auxiliary ships are
generally provided with horizontal shaft, self-contained,
electric-driven windlasses with the motor and reduction
gearing located on the windlass bedplate on the open
deck. These windlasses have combined facilities for
anchor handling and warping. They consist of two
declutchable wildcats on the main shaft and two
warping heads on the shaft ends. These are driven
through suitable reduction gearing by the electric motor.
The motors are reversible, variable speed. They are
provided with magnetic brakes to hold the load if the
power fails or under service conditions. Their dual
magnetic controls provide both straight reversing
characteristics for warping and dynamic lowering
characteristics for anchor handling. Transfer switches
allow selection of the proper characteristics. When used
Figure 5-20.--A simplified representative winch.
for anchor handling, the control usually provides five
5-33
