The main engine safety devices are the protective interlocks and relief devices fitted to a marine diesel engine — including the turning gear interlock, reversing interlock, crankcase relief door and oil mist detector. Each device and what it prevents is listed below.
What are the Main Engine safety devices?
- Turning gear interlock
This interlock prevents the engine from turning when the turning gear is engaged.
- Reversing interlock
Reversing interlock prevents starting air turns the engine to the opposite direction while it’s running.to change the cam direction you have to stop the main engine completely
- Crankcase relief door
The crankcase Relief door is there to prevent building excessive pressure inside the crankcase and to prevent suck air to the chamber from the atmosphere.
- Cylinder head relief valve
The cylinder head relief valve prevents being damage to the cylinder head and liner in case of build excessive pressure such as the event of hydraulic lock.
- Scavenge manifold relief valve
As the name suggests it’s preventing building excessive pressure in scavenge manifold.
- OMD
Oil mist detector is there to monitor oil mist level in the crankcase which could lead to crankcase fire
- Emergency stop button
The main engine can be stopped suddenly using an emergency stop in case of emergency
- Starting airline safety including bursting disc, flame trap, relief valve, and Non-Return valves
Protects air staring system from malfunctioning