# Energy generating speed humps – Mechanical Engineering Project

In your view there may be many uses of Speed Humps like Safety, Speed limiting etc, What if i say speed humps can be also used for power generation? you heard me right using a simple setup we can effectively us speed humps for power generation, So why speed humps? After consuming non-renewable source of energy for years people are looking forward for renewable source of energy.Search of energy lead to power generation using sunlight, wind, tide etc.

When talking about new source of energy people are asking for effective, renewable, maintenance less, nature friendly energy sources. When talking about energy generation using speed humps all above conditions are matching so this method can be effectively used to power street lights, traffic signals etc.

Basic Flow Chart

Materials Required

1. Rack
2. Pinion
3. Large Sprocket
4. Chain
5. Small Sprocket
6. Flywheel
7. Large Gear
8. Small Gear
9. Generator
10. Ball Bearing

RACK AND PINION GEARS: The rack and pinion used to convert between rotary and translatory motion. The rack is the flat toothed part, while the pinion is the gear. Rack and pinion can convert rotary to linear of from linear to rotary motion.

BALL BEARINGS: A roller-element bearing is a bearing which carries a load by placing round elements between the two pieces. The relative motion of the pieces causes the round elements to roll(tumble) with little sliding. They reduce the friction and transmit the motion effectively.

SPUR GEAR: It is a positive power transmission device with definite velocity ratio. It is preferred for adjusting some linear misalignment. It should have high wear and tear, shock-absorbing capacity.

FLYWHEEL: The primary function of flywheel is to act as an energy accumulator. It reduces the fluctuations in speed. It absorbs the energy when demand is less and releases the same when it is required.

SHAFTS: It is a rotating element, which is used to transmit power from one place to another place. It supports the rotating elements like gears and flywheels. It must have high torsional rigidity and lateral rigidity.

SPRINGS: It is defined as an elastic body whose function is to distort when loaded and to recover its original shape when the load is removed. It cushions, absorbs or controls energy either due to shocks or due to vibrations.

ELECTRIC DYNAMO: It is a device, which converts mechanical energy into electrical energy. The dynamo uses rotating coils of wire and magnetic fields to convert mechanical rotation into a pulsing direct electric current through “faraday‟s law of electromagnetic induction”. A dynamo machine consists of a stationary structure, called stator, which provides a constant magnetic field, and a set of rotating winding called the armature which turns within that field.

Principle & Working

Whenever the vehicle is allowed to pass over the dome it gets pressed downwards, then the springs that are attached to the dome are compressed and the rack, which is attached to the bottom of the dome moves downward in reciprocating motion. Since the rack has teeth connected to gears, there exists conversion of reciprocating motion of rack into rotary motion of gears but the two gears rotate in opposite direction. A flywheel is mounted on the shaft whose function is to regulate the fluctuation in the energy and to make the energy uniform. So the shafts will rotate with certain rpm. These shafts are connected through a belt drive to the dynamos, which converts the mechanical energy into electrical energy. The conversion will be proportional to the traffic density.Whenever an armature rotates between the magnetic fields of south and north poles, an E.M.F (electro motive force) is induced in it. So, for inducing this E.M.F. armature coil has to rotate, and for rotating this armature it is connected to a long shaft. For this rotation kinetic energy of moving vehicles is utilized. The power is generated in both the directions; so to convert this power into one direction, a special component is used, called zener diode, for continuous supply. The electrical output can be improved by arranging these power humps in series. This generated power can be amplified and stored by using different electrical devices & can be used to power many products.

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