TYPICAL OIL SYSTEMS Jet Engines Distribution and Lubrication

Early jet engines were total loss system Engine Bearing Chamber Pump Tank Filter Scavenge Pump SUMP Jet engines are now ‘DRY-SUMP - RE-CIRCULATING’ Oil systems i. e. oil was lost in the gas stream TYPICAL OIL SYSTEM - JET ENGINE

Bearing Chambers Front Bearing Chamber Centre Bearing Chamber Rear Bearing Chamber Roller Bearing Ball Bearing (Location Bearing) Roller Bearing TYPICAL OIL SYSTEM - JET ENGINE

Notional oil system Let’s take a closer look at what happens here OIL COOLER MCD PRESSURE OIL PUMP ASSEMBLY OIL TANK MCD SCAVENGE MASTER MCD TYPICAL OIL SYSTEM - JET ENGINE

Bearing Support Structure Shaft et J il O Oil Supply Scavenge Bearing Oil Supply and Scavenge TYPICAL OIL SYSTEM - JET ENGINE

Bearing Support Structure = static part Pressurised air from compressors Higher pressure air forced into the Shaft = Chamber rotating part Bearing prevents oil loss et J il O Oil Supply Air/Oil scavenged away to tank TYPICAL OIL SYSTEM - JET ENGINE

Notional oil system with Air Sealing Clean(? ) Air Overboard OIL COOLER MCD PRESSURE Gearbox Drive Centrifugal Breather OIL PUMP ASSEMBLY OIL TANK MCD SCAVENGE MASTER MCD Scavenge Oil passes through Air/Oil Separator in Oil Tank TYPICAL OIL SYSTEM - JET ENGINE

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