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Marine Mooring Winch


Machine to twist the rope.winch to maintain and twist the rope in tension, and can store the rope also called mooring winch.

Winch or mooring winch, mainly used to twist the rope. Bow mooring machinery is performed by windlass drum, some large ship at the bow designed special mooring winch; middle ship rope by cargo winch drum twist, some large ships also dedicated mooring winch; on the stern deck is another mooring winch or mooring capstan.

Winch has vertical or horizontal. Vertical winch called capstan. According to the power different divided steam winch, electric winch and hydraulic winch.

Classification of winch

According to the power source, electric winch , hydraulic winch, and steam winch.

According to the axial direction of drum, can be divided into horizontal and vertical cable winch.

Horizontal marine winch

General horizontal winch drum is driven by the motor after drive operation, the deck occupies a larger area.

Vertical marine winch

Vertical winch, also known as mooring capstan, because of the power device is generally located in below deck, so a small area occupied of deck and conducive to protect machine.

Automatic tension mooring winch

Automatic tension winch full automatic tension adjustment winch. At present, many large ships have been installed automatic mooring. The power source of the automatic mooring winch is electric and hydraulic. The basic principle is winch drum applied a adjustable torque, in order to maintain a balance of mooring line tension caused by vessel moment. When ship due to change of draft or by tides, wind effects, leading to the mooring rope tension decreased to deviate from the prescribed value, automatic winch can accordingly automatic retractable cable, to stable tension to the specified value. In this way, can prevent the cable break, ensure mooring safety, and reduce the labor intensity and operating personnel on duty.

When the cable relaxation and tension decreases, it can automatically control pressure regulating valve action pressure valve closure, high pressure oil pump discharge high pressure oil into the hydraulic motor, drive shaft and drum along the clockwise rotation, the relaxation cable wrung.

When the tension reaches the original value, the pressure valve is automatically opened, most of the pressure oil flow into the tank, small amount of oil into the hydraulic motor to add the amount of leakage oil, so that the drum stops rotating. When the mooring tension is greater than the hydraulic fluid brake force, mooring will boost motor reversing loose cable.

The hydraulic motor is inverted and is mixed with the oil liquid discharged from the high pressure liquid pump, and the pressure regulating valve is a low pressure liquid circulation. The automatic mooring machine must have the corresponding rotating guide device (universal cable guide fairlead).

Because the automatic winch must roll mooring cable on the winch drum, a limited number of. General cargo is usually only two bow rope and two stern rope can be automatically retracted, can only satisfy the general situation. And when the ship's draft great changes or due to tidal and wind the cable tension variation is large, still need artificial timely adjustment of all cables. According to the requirements of IMO, the oil tanker parked, the automatic tension winch should be placed in the "un-automatic" working status.

Installation requirements and inspection methods for winch

Winch device have windlass assemble mooring device device and crane assemble mooring device, the installation of such units to install corresponding windlass, winch. Special mooring device installation, mooring winch frame should be according to the pattern size on the deck erection and welding, welding specifications should be consistent with the pattern, without such as weld cracks, leakage welding, welding slag, arc pit defects. The base pad (including lateral base) surface processing after welding should be carried out, outward tilt is less than 1: 100 requirements.


  1. An orbital motor , also known as an orbital hydraulic motor, is a type of hydraulic motor that operates on the principle of an orbiting mechanism. It converts hydraulic pressure into rotational motion by utilizing an eccentrically rotating shaft within a housing.


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