Air Bearing

WelcomePresentation On Air Bearing

By-Ketan Shete

Intent:-

• Intro.• Types of bearings.• Mechanism.• Benefits/Advantages.• Disadvantages.• Applications & Scope.• Termination.

So What is Bearing…..?A bearing is a machine element that

constrains relative motion to only the desired motion, and reduces friction

between moving parts.

Another Definition:-An air bearing is a non-contacting system where a gas film (typically air) acts as the lubricant that

separates the two surfaces in relative motion.

Types:-

There are two types of air bearing systems:-

Aerostatic.

Aerodynamic.

Mechanism AEROSTATIC :-

Externally pressurised: A separate external supply of air is fed under pressure between the

two surfaces being kept apart.It is a continuous flow system where pressurised gas from the

source flows through restrictorsinto the clearance between the bearing surfaces escaping to the

atmosphere at the outsideedges of the bearing.

Mechanism AERODYNAMIC:- • Self generating: The supporting film is generated by the

relative motion of the two surfaces being kept apart.• An aerodynamic bearing can be of several types. The design

characteristics differ greatly between journal and axial bearings and they can suffer problems of instability.

Benefits/Advantages:-

1. Greater Precision.2. High Speed.3. Increased Tool Life.4. Improved Surface Finish.5. Long Bearing Life.6. Lack of Maintenance.7. Low Thermal Growth.8. Large Load Capacity.9. Reduced Vibration

Disadvantages:-

• High geometric accuracy during manufacturing.

• Clean and dry supply of pressured air.• High prizing.

Applications:-

• Hover Craft-Transport.

Application:-

• Uplifting heavy weights- We can lift up to 5 tons without efforts using

this technology.

Application & Scope:-• Upcoming vehicles will use this technology.

Termination:-

• There will be no issue of lifting up much more heavy loads in future if we use this technology. Transportation will affect much more with this technology. Speed will speed & efficiency up at much extent of transport .