101. Why does the engine oil system run out of oil or experience an oil cut-off, and what are the hazards?

Reason: 1) The oil system experienced severe oil leakage due to ruptures in the pipelines and tanks, which led to a significant drop in oil pressure. If this was not detected in time, it would result in a shortage of oil in the system and ultimately an interruption in oil supply； 2) When the main oil pump fails and the auxiliary oil pump cannot start in interlock mode ； 3) The fuel tank level is too low, causing the fuel pump to draw a vacuum ； 4) The lubricating oil filter becomes clogged, resulting in a drop in oil pressure and a lack of oil supply to the bearings. 5) Operational errors can lead to an interruption in the oil supply. Consequences: This results in a reduction and interruption of the lubricating oil supply; the temperature of the bearing oil rises sharply, the tungsten alloy in the bearing shells melts, the rotor sinks, causing the moving and stationary parts of the unit to collide and damaging the impeller as well as the air seal teeth.

Reason: Leakage losses at various points in the oil circuit system, high-temperature atomization losses (fume), failure of the oil pump with the backup pump unable to start automatically, emptying of the oil pump, and untimely cleaning of the filters in the oil circuit system. Hazards: Same as above