IJSRD - International Journal for Scientific Research & Development| Vol. 3, Issue 11, 2016 | ISSN (online): 2321-0613
Performance Evaluation of Pulley Arm Design
Mohsin M. Khan1 Umesh M. Mohod2 Naved A. Shaikh3
1,3
M.E. Student 2Assistant Professor
1,2,3
Department of Mechanical Engineering
1,2,3
Anuradha Engineering College, Chikhli
Abstract— Here in this study CAD method has been
explored to design and analysis of pulley arm and belt,
which considered being the main parts of a rod cutting
machine. The cutting speed of a present system of pulleys
and belt is very low in actual working conditions. The
ultimate aim of the project is to increase the cutting speed
Finite Element Analysis was done for investigation of
stresses experienced by the pulley. Finite Element Method
(FEM) is used to determine the BM shared by the arms for
its different angular positions. The distribution of bending
stress in the arms is also obtained. Finally, the design
modifications have been suggested the parameters, By using
this parameters the new design is developed which is able to
give the cutting speed which is required for the actual
working conditions. The results showed that stress
experience by the pulley is less than the young’s modulus of
the material. This ultimately enhances the life of the pulley
and belt. It is also observed that the total deformation is very
less and not crossing the bounding box limits. Hence part is
safe.
Key words: CAD Method, Pulley, FEA, Stress Analysis
mounted on the fixed and moving axles, further increasing
the mechanical advantage.
II. STRESS ANALYSIS
Stress analysis is the complete and comprehensive study of
stress distribution of specimen under study. The most
important task before design, engineer is to maintain the
working stresses within predetermined specific limits, in
order to avoid the failure of a member. The design has to be
economical with adequate mass and inertia. To improve the
product quality, it is necessary to determine the stresses in
various components. It is also necessary to know the stress
distribution in order to predict the failure of component.
This puts the design engineer into indispensable need for
stress analysis.
A. Purpose of Pulley Stress Analysis
Purpose of pulley stress analysis is:
 To avoid failure of pulley.
 To avoid breakage of belt.
I. INTRODUCTION
A pulley is a wheel on an axle or shaft that is designed to
support movement and change of direction of a cable or belt
along its circumference. Pulleys are used in a variety of
ways to lift loads, apply forces, and to transmit power. In
nautical contexts, the assembly of wheel, axle, and
supporting shell is referred to as a "block."A pulley may
also be called a sheave or drum and may have a groove
between two flanges around its circumference. The drive
element of a pulley system can be a rope, cable, belt, or
chain that runs over the pulley inside the groove.
A flat belt drive is designed by limiting the
maximum tension Tt according to the permissible tensile
stress specified for the belt material. Pulley material is
generally cast iron or cast steel.
Different types of pulley systems:
A. Fixed:
A fixed pulley has an axle mounted in bearings attached to a
supporting structure. A fixed pulley changes the direction of
the force on a rope or belt that moves along its
circumference. Mechanical advantage is gained by
combining a fixed pulley with a movable pulley or another
fixed pulley of a different diameter.
B. Movable:
A movable pulley has an axle in a movable block. A single
movable pulley is supported by two parts of the same rope
and has a mechanical advantage of two.
C. Compound:
A combination of fixed and movable pulleys forms a block
and tackle. A block and tackle can have several pulleys
Fig. 1: Stresses in pulley
III. REASONS OF FAILURES
There are various reasons, which could affect a pulley belt
system. The safe design can provide protection against some
of this failure by performing stress analysis according to
ansys software.
1) Total deformation beyond the bonding box limit.
2) Equivalent stress produces is more than young’s
modulus
3) Von misses stress crossing the specified limit.
IV. DESIGN OF PULLEY
Pulley is designed by considering the speed which is
required. Accordingly parameters taken by the design data
book for safe design of pulley.
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Performance Evaluation of Pulley Arm Design
(IJSRD/Vol. 3/Issue 11/2016/179)
Designed part may be tested at company level for different
observations.
REFERENCES
Fig. 2: Design of pulley
V. MODELING OF PULLEY
Fig. 3: model of pulley
The user constructs a model of the part to be analyzed in
which the geometry is divided into a number of discrete sub
regions, or elements, connected at discrete points called
nodes. Certain of these nodes will have fixed displacements,
and others will have prescribed loads. These models can be
extremely time consuming to prepare, and commercial
codes vie with one another to have the most user-friendly
graphical \pre-processor" to assist in this rather tedious
chore. Some of these pre-processors can overlay a mesh on a
pre-existing CAD file, so that finite element analysis can be
done conveniently as part of the computerized drafting-anddesign process.
[1] Pravin M. Singrua,*, Jayant P. Modak, “Dynamics of
arm of a flat belt drive pulley with explanation of belt
flutter”
[2] Rashmi Uddanwadiker, “Effect of Rim Thickness on
Load Sharing in the Rotating Elements.” American
Journal of Mechanical Engineering 1, no. 5 (2013):
126-130. doi: 10.12691/ajme-1-5-4.
[3] S. M. Dhengle, Dr. D. V. Bhope, S. D. Khamankar,
“INVESTIGATION OF STRESSES IN ARM TYPE
ROTATING FLYWHEEL”
[4] N. W. Pathan , Dr. D.V. Bhope, Prof. S.D Khamankar,
“INVESTIGATION OF STRESSES IN FLAT BELT
PULLEY BY FEM AND PHOTOELASTICITY”
[5] Shrikant A. Thote, M.K. Sonpimple, G.D. Mehta, “An
Approach to Find the Stresses Induced In a Flat Belt
during Half Rotation of a Driving Pulley”
[6] R.G. Parker, “Efficient eigensolution, dynamic
response, and eigensensitivity of serpentine belt
drives”
[7] Joel Dunlop, Amir Khajepour, “A new multi-terminal
pulley model for use in graph theoretic modeling”
[8] Shrikant A. Thote, M.K. Sonpimple, G.D. Mehta, “An
Approach to Find the Stresses Induced In a Flat Belt
during Half Rotation of a Driving Pulley”
[9] L. K. Nordell and Z. P. Ciozda, “Transient Belt
Stresses During Starting and Stopping: Elastic
Response Simulated by Finite Element Methods”
[10] Gregor Čepon1, Lionel Manin2, Miha Boltežar3 from
University of Ljubljana, “Validation of a Flexible
Multi body Belt-Drive Model”
VI. CONCLUSION (ANALYSIS)
In this study CAD method has been explored to design and
analysis of a pulley and belt, which happens to be the main
parts of a cutting machine. It is observed that, Computer
Aided Design (CAD) is an effective tool for the
development of any critical product and Finite element
Method is an effective tool for investigation of stress
analysis in components.
All the stresses are under specified limit. and total
deformation nt crossing the bonding box limit
Hence we can conclude that, the new design of
pulley and belt is capable to give the required speed without
any failure which matches with the company requirement.
VII. FUTURE ENHANCEMENT
May designed the system using v-belt pulley.
By replacing the material of belt and pulley.
Motion analysis can be performed to check the actual
failure.
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