Lubrication is the process or technique of using a lubricant to reduce friction and wear and tear in a contact between two surfaces. The study of lubrication is a discipline in the field of tribology.
In the aerospace context, lubrication refers to the use of a lubricant, such as oil or grease, to reduce friction and wear between moving parts in aircraft and spacecraft systems. Lubrication is an important factor in maintaining the reliability and longevity of these systems, as it helps to prevent damage caused by excessive heat and wear.
Examples of lubrication in aerospace context:
- In aircraft engines, lubrication is used to reduce friction between the moving parts of the engine, such as the crankshaft, connecting rods, and pistons. This helps to increase the efficiency of the engine and extend its lifespan.
- In the landing gear systems of aircraft, lubrication is used to reduce friction between the gears and bearings, which helps to ensure smooth operation of the landing gear and prevent damage during takeoff and landing.
- In spacecraft, lubrication is used in the mechanisms that control the position of solar panels, antennae and other equipment on the spacecraft. This helps to ensure smooth movement of the equipment and prevent damage caused by friction and wear.
- In the control surfaces of aircraft such as flaps, ailerons, and rudder, lubrication is used to reduce friction and wear in the hinge mechanisms and cables which help to control the aircraft's movement in the air.
It's important to note that lubrication in aerospace applications require special consideration because of the harsh conditions of space and high altitude flights. The lubricants used should be able to withstand high temperatures, vacuum and have a low volatile component as well as being non-toxic and non-flammable.
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