Gear box –industrial applications

V.J.MANDRAWADKER

Gear Box –Industrial Applications

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Gear Box- Industrial Applications

Contents:

IntroductionGear/Gear BoxTypes of GearsTypes of Gear BoxesConstruction of Gear BoxesApplications of Gear BoxesConclusion

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Introduction: Every machine works at different speeds.But

the prime mover say motor runs at fixed RPM, say 1440,2800 etc. Hence it becomes necessary to reduce the speed of the motor. Therefore one assembly known as GearBox will be used in between motor and output machine.


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Gear: A gear is a cylindrical part having cut teeth on its periphery , which mesh with another toother part (gear) in order to transmit torque.

Gear Box: A gear box is a mechanical method of transferring energy from one device to another and is used to increase torque while reducing speed.

It is an assembly of Gears, shafts, bearings, keys, bearing covers, oilrings , oilseals and a casing to house all these machine elements.


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Types of Gears:SpurHelicalBevelWormSpiralPlanetary


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Types of Gears

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Classification of Gear Boxes: Gear Boxes are classified as per the following criterion.

a) As per the type of gears used i) Spur ii) Helical iii Bevel iv) Worm v) Spiral vi) Planetary


b) As per the assembly of gear box i) Horizontal ii) Vertical

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Construction of Gear Boxes:Every gear box contains the following

elements.i) Gear box Housing or casingii) Gearsiii) Shaftsiv) Bearingsv) Bearing coversvi) Keysvii) Oil seals/oil rings

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Gear boxes are widely used in Industries.It is difficult to make a full list, however the following list gives majority of applications.

1. Electric Overhead Travelling Cranes2. Machine Tools e.g.Lathe,Drilling

machines,Milling machines,Grinding machines

3. Sugar machinery4. Cement machinery5. Automobiles6. Material handling equipments

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Conclusions:Gear box is an essential unit of every

machine. Because machine runs with specific

speeds/torque which are to be provided as per the need of material,tool and customer.

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Gear box –industrial applications

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