Gravity Powered Light using Compound Gear System

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 04 Issue: 11 | Nov -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 809
Gravity Powered Light using Compound Gear System
Keerthan gowda R J1 ,Dr. L Chandrasagar2,H S Manjunath3
1 Department of Mechanical Engineering, Dr. Ambedkar Institute of Technology Bangalore, India
2 Professor Department of Mechanical Engineering, Dr. Ambedkar Institute of Technology Bangalore, India
3 Assistant Professor Department of Mechanical Engineering, Dr. Ambedkar Institute of Technology
Bangalore, India
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Abstract- From Recent circumstances man has been in
quest for energy to take care of his consistently expanding
demand. These days the general public has woken up to the
immense dangers of contamination and a dangerous
atmospheric devation caused by fuel based energy sources.
The issue of creating power is late journey, so everybody
should think gravity be the alternative in non-customary
energy sources. Since gravity is accessible all finished in
bottomless amount. Since gravity is available all finished
from start of universe. Sir Issac Newton find marvel of
gravity close to 400 year prior. On top of itisinexhaustible. It
is predictable i.e. 24 X 7. Contrasting with concoction, warm
and other energy source gravity is frail, is adaptable. This
shortcoming is basically because of the consistency, or
relentless state, of our cooperation with gravity. Asgravity is
feeble it can't be proficiently be changed over into electrical
energy or in other frame .In this paper we have outlined a
strategy wherein gravitational energy isadditionallyopened
up as far as its greatness by utilizing mass unbalancing
mass. It can be effectively be changed into usable electrical
energy. At the point when contrasted with different
wellsprings of energy like hydal, warm, tidal, wind, atomic
and so on it's available all more than 24*7 reliably. Idea of
gravity control age is straightforward. It is the point at
which a body goes descending fromhigherelevationtobring
down one its potential energy getchangedoverinto dynamic
energythroughstraightmovement. Dynamoproducespower
changing over this linear motion into round motion.
Keywords: Renewable source, Gravitational Energy,
Dynamo, Electrical Energy
INTRODUCTION
Age of energy in the any frame is request of the day and
electric energy in particular is the most elevated energy
popular. The greater part of the electric energyisdelivered
by warm power plant and rest of it is created by hydro-
electric power stations, tidal power, sun powered, atomic,
geo-warm and wind factories.
As of late there is a solid drive from every one of the
administrations all through the world for age of clean
energy without dirtying nature and utilizing sustainable
power source assets. Wind factoriesareutilizedasa partof
a large portion of the nations to produce the spotless
energy which can be created by utilizing the high breeze
weight which is accessible in plenitude in nature and non-
contaminating the nature. Notwithstanding copious
accessibility of wind and non-contaminating characters of
the breeze process, there are couples of confinements in
utilizing the breeze factories. In and around the breeze
process establishment areas, therecan'tbeanyhumanand
winged animal's inhabitations because of high vibrations
from the breeze factories and gigantic clamor levels
created from wind process outfit box. Flying creatures are
limited not to enter the close region of the breeze
processes by utilizing a particular scope of radio waves to
maintain a strategic distance from fledgling effect on the
cutting edges and consequentlyharmofthebreezeprocess
itself. Likewise high breeze weights and great soil quality
required to introduce the breeze factories. Because of
every single above confinement, energy age because of
wind factories isn't practical dependably.
Another most normal type of clean energy age is sunlight
based energy. Indeed, even sun oriented energy is
plenteous and non-contaminating in nature. Sun oriented
cells are utilized to change over the plentiful light beams
falling on sun based cluster into electric current. Sadly, the
measure of energy produced per unit range of sun
powered cells is less contrasted with some other type of
energy age. Additionally sun powered energy can be
produced just amid crest summer season to the most
extreme degree and is regular. Less or insignificant
measure of energy is created amid winter and blustery
season which is tremendous downside of sun based
energy. Likewise the underlying venture made to build up
the setup required to trap sunlightbased energyiscolossal
as there is a need of battery dependablytostorethe energy
caught. Contrasted with different types of energy, due to
above reasons it is infeasible to utilize sun oriented energy
on regular schedule. Is just sun oriented, wind and hydro
energy are sustainable and clean energy accessible to
deliver electric current..? Be that as it may, the
developments and inventiveness changed those
fundamental musings. Presently we can deliver electric
current utilizing gravitational power,vehiclehittingguard,
rec center gear development, cycling and so on
gravitational power which is sustainable power source
likewise spotless and non-dirtying which is better
contrasted with other type of sustainable power source.
Utilizing gravitational energy we can createelectricflow at
all season. In current circumstance numerous nations like

india as yet utilizing lamp fuel lightsinremotezoneswhich
are exceptionally unsafe to wellbeing. Gravity light which
replaces this place to give clean and non-contaminating
energy the space requiredforestablishmentofgravitylight
is little contrasted with some other sustainable power
source assets. The gravity light is essentially blend of
planetary apparatus framework, little generator and dead
weight which changes over potential energy into dynamic
energy. It just takes enough venture expenses and give the
yield which is free till its lifetime. Executing this in every
single home can change the world to deliver eco-
accommodating energy and brings down the interest for
non-sustainable wellsprings of energy primarily
incorporate coal, oil based goods. The gravity light
encourages the world to be a superior place by giving
contamination free electrical energy.
In the present this is I am working towards the age of
electrical energy by utilizing gravitational power which is
plenteous in nature and a free type of energy. Hear the
dead weight is lifted to a predefined tallness and left to fall
under gravity. This dead weight set aside some
opportunity to achieve the ground and drives the
compound gearbox driving the yield shaft which will be
associated with the generator which producescurrentand
is put away in the battery through which globule is driven.
PROBLEM DEFINITION
The goal of project is to provide cheap and harmless
energy alternative. The power output is enough to
light a small room. But with subsequent researchand
developments more output could be generated.
METHODOLOGY
 The essential goal of the present instrument is to
give gravity control age component which can be
nonstop and stableoperationtoconstantlychange
over the gravity potential energy into the active
energy and after that to change over the dynamic
energy into the electrical energy, in order to play
out quite a while viable and stable energy yield.
 This component used the gravity energy
transformation unit to change over the gravity
potential energy into the active energy. The
gravity energy change unit produces positive
torques by compound riggings. Transformationof
changing over gravity potential energy into the
dynamic energy. Next, the dynamic energy will be
transmitted to a power producing unit to play out
another energy change of changingovertheactive
energy into the electrical energy. Lastly, a power
supply framework used to transmit the electrical
energy out.
Fig. 1: Fabricated gravity light
The main components used in this project are:
1. Spur gear
2. Shaft
3. Load
4. D.C. motor
5. sprocket
6. Chain
7. Bearing
8. Casing
9. Stand
3.1 Spur gear
Spur gears are the least difficult kind of gear. They
comprise of a chamber or plate with teeth anticipating
radially. Despite the fact that the teeth are not straight-
sided the edge of every tooth is straight and adjusted
parallel to the pivot of turn. These rigging work together
accurately just if fitted to parallel shafts. No hub push is
made by the tooth loads. Goadgearsareincredibleatdirect
speeds however have a tendency to be loud at highspeeds.

Fig.2: Spur gear
3.2 Shaft
A drive shaft, driveshaft, driving shaft, propeller shaft is a
mechanical part to transmit torque and turn, generally
used to interface different segments ofa drivepreparethat
can't be associated specifically in light of separation or the
need to take into consideration relative development
between them
Fig.3: Shaft
3.3 Chain drive
Chain drive is a method for transmittingmechanical power
starting with one place then onto the next. It is frequently
used to pass on energy to the wheelsofa vehicle,especially
bikes and bikes. It is likewise utilized as a part of a wide
assortment of machines other than vehicles.
Fig.4: Chain
3.4 D.C motor
The motor used is a 12-volt electric motor. The motor is a
permanent magnet motor that operates on the 12-volt
battery, which gives the motor enough power to turn the
steel blade at high speeds. The design of the blade motor
will remain consistent to that of other electric mowers
except that the microcontroller with a relay onboard will
control it.
Fig.5: D.C motor
3.5 LED Light
A light-transmitting diode (LED) is a semiconductor light
source. LEDs are utilized as marker lights in numerous
gadgets and are progressively utilized for other lighting.
Showing up as down to earth electronic segments in 1962,
early LEDs discharged low forceredlight,howeverpresent
day variants are accessible over the unmistakable, bright,
and infrared wavelengths, with high brilliance.
Fig.6: LED light
4. DESIGN AND FABRICATION
Gravity light is designed to eradicate the kerosene lamp.
Gravity light’s output is better than a kerosene lamp.
4.1 Working procedure of the Gravity Light:
The gravity light consists of a D.C motor as the generator,a
compound gear system which is a combination of spur
gears of gear ratio 1:5 and a sprocket whichisattachedtoa
chain. When a heavy load applied to the one end of the
sprocket due to gravity the load starts to move downward.
Hence the compound gear system starts to rotate. Withthe
rotation of one spur gear combination we get speed ration
of 1:5 and combination of three of them gives the ratio
about 1:125. As the D.C motor rotates with a low rpm, it
produces enough electricity to light the LEDs.

Fig.7: Designed Graviy Light
4.2 Calculations:
The diagram above has larger spur gear of dia 160mm
Smaller spur gear has a dia of 30mm
By starting with the generator, in this case a D.C motor is
used. When it is turned the shaft of a motor, the motor acts
like a generator, producing electricity. Thereisa small gear
at the end which is connected to the generatorshaftandits
speed is above 200rpm, to find some combination of large
gear with attached small gear and possibly more than one
of them would cause a mass to fall at a slow speed which is
sufficient to light the LED for a long time.
Using 15 kg of load, the potential energy of the load for an
height of 80cm, Ep=mass ×gravity constant ×height of the
load =mgh= 15kg × 9.81 ms-2 × 80cm =117.72 J
This Potential energy is converted to electrical energy by
the generator. Hence,
Generator output =Voltage ×Current flow ×time of load
landing= VIt =7 V× 12 mA × 140 s = 11.76 J
The height from where the load is falling by the gravity is,
h= 80cm.
Time required to fall the load, t= 140 s.
Hence, velocity of the falling mass, v= 0.57 cm per second.
Efficiency= (Output energy /Input Energy)*100%
= (11.76J/117.72J)*100% =10%
5. RESULTS
Some observations are made from the gravity light are
given below:
Table 1: observations of lightning time for different mass
of height 0.8m:
Observations Weight
(kg)
Height
(meter)
Lighting
Time
(seconds)
1 15 0.8 140
2 20 0.8 105
3 25 0.8 80
4 30 0.8 65
Plotting of lightning time:
Fig.8: Graph for lighting time(s) vs. height (feet)
Table 2: Observations of voltage for different weights for
constant height 0.8m
Observations Weight
(kg)
Voltage
(V)
Lighting
Time
(seconds)
1 15 7 140
2 20 9.2 105
3 25 11.5 80
4 30 14 65
Plotting for voltage and weight from 0.8 m height
Fig.9: Graph for Voltage(V) vs. Weight (kg)
Stand
Compound
gear system
Load
Chain

Table 3: Observations of efficiency for different weights
and lighting time for a constant height 0.8m
Observations Weight
(kg)
Efficiency
(%)
Lighting
Time
(seconds)
1 15 10 140
2 20 8.74 105
3 25 7.65 80
4 30 7 65
Table 4: Observations of current for different masses and
a constant height 0.8m
Observations Weight
(kg)
Current
(mA)
Lighting
Time
(seconds)
1 15 12 140
2 20 14.2 105
3 25 16.4 80
4 30 18.3 65
Plotting for current and weight from 0.8meter:
Fig.10: Graph for Current(mA) vs. Weight (kg)
6. CONCLUSION
Generation of gravity power can be increased by
applying much higher load at the end of the sprocket.
Though heavy load increases the voltage and currentofDC
motor but decreases the lighting time of the LED. Applying
heavy load, it may cause bending to the shaft and stand.So
a suitable mass must be used to fall it as much long time as
possible. Due to low gear ratio there is a power loss in a
great extent. Gravity light needs no operatingcost,soitcan
be operated as the demand of the light.Intheremoteareas,
it may play a very important role for studies and educating
children as well as fulfilling the power demand. Moreover,
the power can be stored in the battery so that it may be
very helpful during emergency situations.
8. REFERENCES
[1] R S Khurmi, J K Gupta, Theory of Machines, Pg 428-479,
Eurasia Publishing House Pvt. Ltd. , Distributors S. Chand
and Company Ltd. For Toothed Wheels.
[2] V B Bhandari, Design of Machine Elements, Third
Edition, McGraw Hill Education (India) Pvt. Ltd. forRolling
Contact Bearings, Pp. 564-596.
[3] Prathamesh Natu, Sameer Nadkar, Abhishek
Badgujar[2015],Generation of electricity using gravity
International Journal of Mechanical Engineering and
Technology (IJMET) Volume 6, Issue 7, July 2015
[4] Pankaj Gode, Ankit Jadhav, Kalpesh Gardi, S.R
Bhandari[2016], ChangingPerspective:GravityLight IOSR
Journal of Computer Engineering (IOSR-JCE)
[5] Digvijay S. Jadhav, Sagar N. Hullule, Nitin N.
Jejurkar[2016], Gravity power generation International
journal of Advance Research in Science and Engineering
(IJARSE)
[6] Sabir Hossain [2015], Design and Fabrication Of a
Gravity Powered Light
https://www.researchgate.net/publication/2015
[7] Shahu A. Zalte, Mithil R. Mogare [2017], Design and
Development of Gravity Lamp International Research
Journal of Engineering and Technology (IRJET)
[8] “Gravity Light Description of the Concept and its
Realization” archived at http://archive.aec.at/ last
accessed on 15 th May, 2016
[9] http://www.fastcoexist.com/3050137/hows-that-
working-out-for-you/this-ingenious-20-lamp-gets-all-its-
energy-from-gravity accessed on 19 th May, 2016.
[10]http://www.engineering.com/DesignerEdge/Designer
EdgeArticles/ArticleID/13777/GravityLight-Brings-Clean
Energy-to-Kenya.aspx

Gravity Powered Light using Compound Gear System

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