Airless tyre

Airless tyre

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  AIRLESS TYRE/ NON- PNEUMATICTYRE Guided by Dr. R G Patil Mr. Balakrishna Presented by Permi Jagadish 1AT10ME031 ATRIA INSTITUTE OF TECHNOLOGY BANGALORE DEPARTMENT OF MECHANICAL ENGINEERING TECHNICAL SEMINAR ON
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  Topics  What isa pneumatic tyre and its drawbacks.  What is an airless tyre?  How it works?  Different design approaches.  Advantages and disadvantages.  Applications.
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  Pneumatic tyres  Apneumatic, 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.
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  Drawbacks  Puncture orBlowout.  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.
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  What is airlesstyre?  Airless tyres or Non-pneumatic tyres (NPT) , are tyres that are not supported by air pressure.
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  continued..
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  How it works? Theflexible tread and shear bands deform temporarily as the spokes bend, then quickly go back to the initial shape.
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  Design approach NASA’S Apollo LunarRover Michelin
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  continued.. Bridgestone Resilient Technologies, LLC
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  Advantages  Eliminates airleaks 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.
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  Disadvantages  Lack ofadjustability.  Vibration.  Different Manufacturing technique.  Not as economic as pneumatic tyres.
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  Applications Used on somesmall vehicles such as riding lawn mowers and motorized golf carts. In backhoe or bulldozers.
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  continued.. For Military vehicles Alsoused in All Terrine Vehicles (ATV)
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  Conclusion For years, vehicleshave 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.