Carbon based sealing material sealing ring segments in stuffing box in ammonia two stroke engine running on ammonia fuel

摘要

In a two stroke crosshead engine the crankcase is separated from the cylinder and scavenge space by a stuffing box, the piston rod slides up and down against the sealing ring segments held by the stuffing box. The sealing ring segments, or sealing rings, are made from bronze or similar alloys. Bronze is not compatible with ammonia fuel mixed with scavenge air in the scavenge space, the bronze will corrode and damage the piston rod surface.Changing the primary sealing material of the sealing ring segments, or sealing rings, from bronze to a Carbon based sealing material, since carbon is not affected by the ammonia in the fuel.