Aircraft Gas Turbine Engine Lubrication Systems
Aircraft Gas Turbine Engine Lubrication Systems Both wet and dry sump lubrication systems are used in gas turbine engines . Wet-sump engines store the lubricating oil in the engine proper, while dry-sump engines utilize an external tank mounted on the engine or somewhere in the aircraft structure near the engine, similar to reciprocating piston engines . Turbine engine’s oil systems can also be classified as a pressure relief system that maintains a somewhat constant pressure: the full flow type of system, in which the pressure varies with engine speed, and the total loss system, used in engines that are for short duration operation (target drones, missiles, etc.).
The most widely used system is the pressure relief system with the full flow used mostly on large fan-type engines. One of the main functions of the oil system in turbine engines is cooling the bearings by carrying the heat away from the bearing by circulating oil around the bearing. The exhaust turbine bearing is the most critical lubricating point in a gas turbine engine because of the high temperature normally present. In some engines, air cooling is used in addition to oil cooling the bearing, which supports the turbine. Air cooling, referred to as secondary air flow, is cooling air provide by bleed air from the early stages of the compressor.
At a Glance
- Aircraft Gas Turbine Engine Lubrication Systems Both wet and dry sump lubrication systems are used in gas turbine engine
- Wet-sump engines store the lubricating oil in the engine proper, while dry-sump engines utilize an external tank mounted
- Turbine engine’s oil systems can also be classified as a pressure relief system that maintains a somewhat constant press
*Read the full story at the source link for more details.*
