Magnetic seal system

An engine assembly comprising:

• an engine core including at least one internal combustion engine;
• a rotatable shaft operatively engaged with the engine core;
• a support structure mounted around the shaft, the support structure housing at least a section of the shaft;
• a magnetic seal system connected to the support structure, the magnetic seal system including:
• a rotating annular seal assembly surrounding the shaft to rotate therewith, the annular seal assembly including an annular seal, the annular seal being made from wearable material gradually wearing off from rubbing contact with another component;
• and
• a non-rotating biasing assembly sealingly mounted to the support structure around the shaft and axially engaging the annular seal assembly, the biasing assembly including:
• an annular magnet unit configured to be axially displaceable relative to the shaft and to be supported surrounding the shaft, the annular magnet unit exerting an attracting force on the annular seal assembly to biasingly displace the annular magnet unit towards the annular seal for rubbing contact during rotation of the rotating annular seal assembly, and
• a bias member unit non-magnetically biasing the annular magnet unit axially relative to the shaft towards the annular seal, wherein adjacent contacting surfaces between the annular seal and the annular magnet unit biasingly contact one another to form a sealing interface therebetween in which the wearing off of the annular seal during rotation of the rotating annular seal assembly conforms the contacting surface of the seal to the contacting surface of the annular magnet unit.