AIRLESS TYRE/ NON-PNEUMATIC TYRE

Guided byDr. R G PatilMr. Balakrishna

Presented byPermi Jagadish1AT10ME031

ATRIA INSTITUTE OF TECHNOLOGY BANGALORE

DEPARTMENT OF MECHANICAL ENGINEERING

TECHNICAL SEMINAR ON

Topics What is a pneumatic tyre and its drawbacks.

What is an airless tyre?

How it works?

Different design approaches.

Advantages and disadvantages.

Applications.

Pneumatic tyres A pneumatic, or air-filled, tyre is made

of an air tight inner core filled with

pressurized air.

The pressure of the air inside the tyre is

greater than atmospheric air pressure, so

the tyre remains inflated even with the

weight of a vehicle resting on it.

It gives a certain degree a cushioning

effect as the tyre hits bumps in the road.

Drawbacks Puncture or Blowout.

A blowout at high speeds can lead

to a dangerous car accident.

Variations in air

pressure changes tyre

performance.

Can blow out by gunfire or

explosion.

What is airless tyre?

Airless tyres or

Non-pneumatic

tyres (NPT) ,

are tyres that are

not supported

by air pressure.

continued..

How it works?

The flexible tread and

shear bands deform

temporarily as the spokes

bend, then quickly go

back to the initial shape.

Design approach

NASA’S Apollo Lunar Rover

Michelin

continued..

Bridgestone

Resilient Technologies, LLC

Advantages Eliminates air leaks or tyre blow outs.

No maintenance required.

Facilitate recycling.

Remains mobile even with some of the spokes are damaged

or missing.

Durability & Long Life.

Can take gunfire or explosion.

Less environmental impact.

Disadvantages Lack of adjustability.

Vibration.

Different Manufacturing technique.

Not as economic as pneumatic tyres.

Applications

Used on some small

vehicles such as riding

lawn mowers and

motorized golf carts.

In backhoe or bulldozers.

continued..

For Military vehicles

Also used inAll Terrine Vehicles (ATV)

Conclusion

For years, vehicles have been running on

pneumatic tyres and there was almost a full stop for any

further improvement of tyres. In 20th century the engineers

have come up with a new concept where the tyres never

require air, if the drawbacks that are being encountered

presently are and improved then there is good future for

these tyres. And the vehicles can run without the necessity

of air.