Aerospace Engine Lube Systems
|Research and field experience has established that fluid contamination degrades the performance and life of equipment.
To improve lube component and system reliability and performance, fine filtration is required.
Problems Caused by Contamination
On any powerplant, the lubricant fluid is a repository for particulate contamination. This contamination originates from several sources:
|Component wear, e.g. fatigue wear on bearings||Significantly reduced bearing life|
|Water Contamination during engine storage||Corrosion|
|High temperature and contaminant||Fluid Oxidation and deposit formation, coke formation|
Find more details on wear mechanisms.
Benefits of Fine FiltrationFine filtration removes harmful contaminants from the lubrication system and this will:
- Improve the operating reliability and performance of the lubrication system
- Significantly reduce maintenance costs
- Extend component service life
Typical Filter Locations – Lube SystemAn aerospace engine oil system (lubrication system) is typically made up of the following components as shown in the schematic below:
The oil pump takes oil from the oil reservoir (lube tank), delivers it under pressure to the oil filter assembly (HP, Pressure filter) and then feeds it to the main engine internal lubrication channels and spray jets. The oil then returns via the scavenge pumps and the oil filter assembly (LP, Scavenge filter), if a filter is fitted, to the main tank.
Filter SolutionsFiltration products include:
- Filter Assembly (Dual stage or single stage)
- Filter Element
- Dirt Alert® Filter Element
- Dual Stage or Single Stage
- Differential Pressure Indicators/Switches
- Bypass valves/Check Valves.
- Last Chance Filters
Technical Papers/Field StudiesJohnson,N. and Madhavan, P. (1994) "Fine Filtration for Turbofan Engine Lube Systems", GE Aircraft Engines and Pall Corporation, SAE E-34 Technical Symposium
Koon, K.F, (1984) "Lube System Field Experience on the T700 Engine" Pall Corporation Symposium on Contamination and Wear
Lynch, C. W. and Cooper, R. B.(1971) "The Development of a Three-micron Absolute main Oil Filter for the T53 Gas Turbine" Journal of Lubrication Technology
Madhavan, P. (September 2004) "Filtration Technology for Aircraft Gas Turbine Engine Fuel and Lubrication Systems", Aircraft Technology and Maintenance, 2005 Engine Year Book