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Advanced Jet Engine Oil Systems: Lubrication and Distribution Overview

This document provides a comprehensive overview of typical oil systems in jet engines, emphasizing the evolution from total loss systems to modern dry-sump, re-circulating systems. Key components such as bearing chambers, oil pumps, oil tanks, and scavenging procedures are discussed in detail. The integration of pressurized air from compressors and the function of oil coolers and separators are also highlighted to illustrate how oil is managed efficiently within the engine. Understanding these systems is crucial for optimizing performance and minimizing oil loss.

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Advanced Jet Engine Oil Systems: Lubrication and Distribution Overview

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  1. TYPICAL OIL SYSTEMS Jet Engines Distribution and Lubrication

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

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

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

  5. Oil Jet Scavenge Oil Supply Bearing Support Structure Shaft Bearing Oil Supply and Scavenge TYPICAL OIL SYSTEM - JET ENGINE

  6. Pressurised air from compressors Oil Supply Bearing Support Structure = static part Higher pressure air forced into the Bearing Chamber prevents oil loss Shaft = rotating part Oil Jet Air/Oilscavenged away to tank TYPICAL OIL SYSTEM - JET ENGINE

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

  8. Any Questions?

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