Technical specifications of windlass

Technical specifications of windlass
According to the specifications, the anchor machine should mainly meet the following requirements:
(1) The windlass should be driven by an independent prime mover
The prime mover and transmission device should be equipped with protection against excessive torque and impact. For hydraulic windlasses, if their hydraulic pipelines are connected to other deck mechanical pipelines, it should be ensured that the normal operation of the windlass is not affected.
(2) The windlass should have sufficient power and be able to operate continuously
When testing on board, the anchor windlass should have the ability to pull an anchor from a water depth of 82.5m to a water depth of 27.5m at an average speed of not less than 9m/min.
Under the above working load and average speed, it should be able to work continuously for 30 minutes. It should be able to work continuously for 2 minutes under an overload tensile force of not less than 1.5 times the working load (no speed required). The anchor machine should also be equipped with an overload protection device, which can turn to medium speed operation when overloaded.

(3) The chain wheel or reel of the anchor machine should be equipped with reliable brakes
After the brake is tightened, it should be able to withstand a static tensile force of 45% of the breaking load of the anchor chain or steel cable, or a larger static load on the anchor chain. The stressed parts should not deform, and the braking device should not slip.
A clutch should be installed between the sprocket of the anchor machine and the drive shaft, and the clutch should have a reliable locking device. The brake and clutch should be easily and reliably operated. The anchor device should be equipped with an effective chain stopper. The chain stopper should be able to withstand a test load equivalent to the anchor chain, and its stress should not exceed 90% of its material yield point.
(4) The installation of the anchor machine should generally ensure that the three points (anchor chain barrel, chain stopper, and sprocket) led out by the anchor chain are aligned
The explanations of several related terms are as follows:
Workload: refers to the tensile force measured at the exit of the anchor chain wheel.
Overload tension: refers to the short-term overload capacity required by the anchor machine.
Average speed: refers to the speed at which two anchor chains are retrieved when three of them enter the water and are freely suspended.
Supporting load: refers to the large static load that the anchor chain wheel brake should be able to withstand on the anchor chain.