What are windlass safety devices
- Emergency stop
- Overload trip
- Over speed trip
- Mechanical break
- Slipping clutch for over load, to prevent any undesirable damage such as hull damage due to anchor and rope brake out.
What is Slipping Clutch in windlass
- Slipping clutch is commonly fitted between prime mover and gearing
- It is incorporated with motor, magnetic brake and drive shaft
- Set to slip at approximately 133% of full load torque
- Letting go or dropping speed is controlled by friction brake
- Hauling speed is 0.15 m/sec
Why Slipping Clutch is fitted in windlass
- In windlass, undue stresses must not be applied to chain cable and machinery
- Without slipping clutch, excessive stresses could be applied to cable, by armature momentum, by sudden obstruction when heaving, or when bringing the anchor into hawse pipe.
- Fitted also to avoid inertia of prime mover being transmitted to windlass machinery in the event of shock loading on cable, when anchor is being housed
- When ship is riding at anchor, bow stopper prevents the strain for windlass
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