10.1 Windlass and Mooring Winches
This marine hydraulic windlass is used for mooring the ship, compact structure, convenient installation,
this marine hydraulic combined anchor windlass mostly driven by hydraulic pressure, hydraulic pump provide motives for the system, promote the hydraulic motor running, pass to the pinion gear which installed on motors axle end, pinion gear promote bull gear to slow running. The bull gear connect with principal axis, principal axis running promote gypsy wheel through hand-operated proportional valve to control hydraulic motors positive and reverse rotation, speed-up and speed-down, accomplish the work of drop and weigh anchor.
It’s one side equipped with a windlass drum, which is used to roll mooring rope, when ship mooring, through a clutch to accomplish the combine with principal axis, promote the
windlass drum running, accomplish the mooring gropes veer and haul action
The base is composed of high-strength steel plates welded together, turn parts bearing use the copper of high quality. The install method of ship’s hull is connect with bolt, installation convenience. It has sound structure, high quality making, low price, simple operation, suitable for all kinds of small and medium-sized ship to moor and dock.¨Mooring winch is a mechanical device used for securing a ship to the berth.
¨An equipment with various barrels used for pulling ropes or cables, mooring winches play an important role in berthing the ship ashore.
The barrels, also known as winch drums, are used for hauling in or letting out the wires or ropes, which will help in fastening the ship to the berth
¨Mooring winches assembly comes in various arrangements with different number of barrels, depending on the requirement of the ship.
¨The main parts of a mooring winch includes a winch barrel or a drum, a warp end and a driving motor.
Modern mooring winches comprises of elaborate designs with various gear assemblies, which can be electric, pneumatic or hydraulic driven.
¨Most of the modern mooring winches help in avoiding the stress related to constant monitoring of the mooring winches when the ship is berthing at a port.
¨It is essential to tension or slacken the mooring wires according to the flow of the tides and the change in the draught that takes place due to cargo operations.
¨The modern mooring assemblies act as an automatic self tensioning unit, which provides for paying out or recovering wires when a pre-set tension is not present.
¨Appropriate control of the drum movement is an important aspect of the mooring operation. For this reason, band brakes are provided to stop the drum whenever required.
¨Also, it is important that the drum rotates smoothly in both reverse and forward direction.
¨A controller arrangement of the drive motor facilitates forward and reverse direction as and when required, including selection of speeds as per the requirement.
ELECTRO HYDRALIC
¨In a typical electro hydraulic mechanism, one constant-speed electric motor drives two variable-stroke pumps through a coupling and reduction gear
Other installations include two motors, one for driving each pump. Each pump normally drives one wildcat.
However, if you use a three-way plug cock-type valve, either pump may drive either of the two wildcats.
The hydraulic motors drive the wildcat shafts with a multiple-spur gearing and a locking head.
The locking head allows you to disconnect the wildcat shaft and permits free operation of the wildcat, as when dropping anchor
Each windlass pump is controlled either from the weather deck or locally.
¨The controls are hand wheels on shafting that lead to the pump control. ¨The hydraulic system requires your attention.¨Make sure the hydraulic system is always serviced with the specified type of clean oil.
Types of windlass
Normally, you will maintain three types of anchor windlasses-the ¨electric,¨electro hydraulic, and ¨hand-driven windlasses.
In an electro hydraulic windlass, your principal concern is the hydraulic system.
A windlass is used intermittently and for short periods of time. However, it must handle the required load under severe conditions.
¨You should follow the lubrication instructions furnished by the manufacturer.
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