Air bearing

AIR BEARING

Guide: Prof. S H WankhadeName: Altamash ShaikhRoll No: 11PS054

OBJECTIVEINTRODUCTIONWORKING APPLICATIONSADVANTAGES /DISADVANTAGESFUTURE SCOPE CONCLUSION

WHAT IS AIR BEARING??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.

WHY AIR BEARING ??• FRICTION Less Friction as compared to rolling and plain bearing

• WEARIBILITY Materials used in other bearing eventually gets used up with time, which requires replacement.

• LUBRICATION Unlike other bearing ,no lubrication is required.

TYPES OF AIR BEARING There are basically two types of air

bearing:

1)Aerostatic : 2)Aerodynamic:

1. AEROSTATIC BEARING(A-TYPE)

A-type air bearings are a high-lift bearing which, cause the load to lift vertically away from the floor surface as much as 3 inches.

These bearings are used when vertical lift is required before floating the load away.

2. AERODYNAMIC BEARING (B-TYPE)

B-type air bearings cause their loads to lift away from the floor surface just enough to allow them to be floated off to the destination.

B-type air bearings when use in series of four or more are capable of lifting and moving loads of up to 100 tons and beyond.

WORKING Deflated :

In the deflated stage, the air bearing , it is resting on the floor with most of the weight being supported by the center load pad.

Inflated :The second image shows the air bearing in an inflated form

after it has formed a seal with the floor surface. At this stage, the load has not been engaged to float away from the floor.

WORKING

Load Lifted On Air :The above image shows the air bearing after it has engaged and floated the load. Compressed air will then start to escape from the bearing diaphragm into the area that is being contained by the floor seal. The weight of the load causes the compressed air escaping

out of the air bearing to force downward onto the floor surface thus causing the load to float away from the floor.

APPLICATION Lifting weights

NOTE: We can lift more than 5 tons of weights without any efforts.

APPLICATION Hover craft: Used for transporting passengers on land as well as water.

FUTURE SCOPE Future Vehicles can be designed using this

technology.

ADVANTAGES

LOW FRICTION

NO LUBRICATION REQUIRED

LOW HEAT GENERATION

LONG LIFE AND LONG LASTING

MAINTAINANCE FREE

DISADVANTAGE HIGH GEOMETRY ACCURACY DURING

MANUFACTURING.

CLEAN AND DRY SUPPLY OF PRESSURIZED

AIR.

HIGH PRICING.

CONCLUSION

By stating the above points we can say that air bearing is the perfect alternative for carrying and transporting heavy loads.

REFERENCES [1] Licht L, Elrod H. A study of the stability of

externally pressurized gas bearings. J Appl Mech 1960:250–8 June. [2] Bassani R, Ciulli E, Forte P. Pneumatic

stability of the integral aerostatic bearing:comparison with other types of bearing. Tribol Int 1989;22(No. 6):363–74

December. https://en.wikipedia.org/wiki/Air_bearing