This document provides an overview of the design of transmission systems using flexible elements such as belts, ropes, and chains. It discusses the selection and design of v-belts and pulleys, wire ropes, transmission chains and sprockets. Assessment methods for the course include common assessment tests, written assignments, gamification, active learning, and group presentations. Flexible elements are used to transmit mechanical power over comparatively long distances and for conveying purposes. Proper selection and replacement of these elements is important to prevent deterioration.
“V - Belts” - Design of Machine Element Umang Parmar
Introduction to V-Belts.
Construction of V-Belts.
Types of Standard Cross Section of V-Belts.
Designation of V-Belts.
Advantages of V-Belts & Limitation of V-Belts.
Application of V-Belts.
Definition, Use, Types of beariings, Types of Journal bearing, Materials for journal bearing, Failures of journal bearing, Design terms for journal bearing, Types of roller contact bearing, applications of roller contact bearing, Designation of roller contact bearing, Design terms for roller contact bearing, comparison between journal and roller bearings, characteristics of bearings, selection procedure of bearings
“V - Belts” - Design of Machine Element Umang Parmar
Introduction to V-Belts.
Construction of V-Belts.
Types of Standard Cross Section of V-Belts.
Designation of V-Belts.
Advantages of V-Belts & Limitation of V-Belts.
Application of V-Belts.
Definition, Use, Types of beariings, Types of Journal bearing, Materials for journal bearing, Failures of journal bearing, Design terms for journal bearing, Types of roller contact bearing, applications of roller contact bearing, Designation of roller contact bearing, Design terms for roller contact bearing, comparison between journal and roller bearings, characteristics of bearings, selection procedure of bearings
This Presentation Describes the Base Study about different Mechanical Drives and their selection parameters to use in Industry. it will also clear the idea behind selecting the mechanical drives only instead of going for other types of drives.
Unit 1-introduction to Mechanisms, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 7-gear trains, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 6- spur gears, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
This Presentation Describes the Base Study about different Mechanical Drives and their selection parameters to use in Industry. it will also clear the idea behind selecting the mechanical drives only instead of going for other types of drives.
Unit 1-introduction to Mechanisms, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 7-gear trains, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
Unit 6- spur gears, Kinematics of machines of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.
I learned a lot of things about pulleys from http://www.beltcorp.com/pulleys.html and so I made a slide set of what I've learned from this primary source and a couple of other sources. It's great to learn about these timing belt pulleys and how they help make many products and services more available.
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Basics of kinematics mechanisms- Theory of Machines
For editable PPT of this slides are available in the below link
https://www.blogger.com/blog/posts/7791505816728559524?tab=mj&bpli=1&pli=1
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
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Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
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It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
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More examples of our work https://www.r-r-consult.dk/en/cases-en/
1. Design of Transmission Systems
Prepared by
Mr.P.D.Devan
Assistant Professor
Department of Mechanical Engineering
Kumaraguru College of Technology
Coimbatore
3. Content
• Selection of V-belts and pulleys
• Selection of Flat belts and pulleys
• Wire ropes and pulleys
• Selection of Transmission chains and Sprockets
• Design of pulleys and sprockets
4. Assessment Method
• Common Assessment Test
• Written Assignment
• Gamification
• Active Learning
• Group Presentation
5. Flexible Mechanical Elements
• Belts, ropes, chains, and other similar elastic or flexible machine
elements are called as flexible elements.
• It is used transmit mechanical power comparatively long distances and
conveying purpose also.
• Since these elements are elastic and usually quite long, they play an
important part in absorbing shock loads and in damping out and
isolating the effects of vibration.
• Most flexible elements do not have an infinite life. The elements
should be replaced at the first sign of deterioration.
6. Selection of V-belts and pulleys
• The belt drive is used to transmit power from one shaft to another by
means of pulleys which rotate at the same speed or at different speeds.
Selection of a belt drive depends:
• Speed of the driving and driven shafts.
• Speed reduction ratio
• Power to be transmitted
• Centre distance between the shafts
• Space available
• Service conditions
7. Types of Belt Drives
• Light drives. These are used to transmit small powers at belt speeds up
to about 10 m/s as in agricultural machines and small machine tools.
• Medium drives. These are used to transmit medium powers at belt
speeds over 10 m/s but up to 22 m/s, as in machine tools.
• Heavy drives. These are used to transmit large powers at belt speeds
above 22 m/s as in compressors and generators.
9. Cont..
• Flat belt- is mostly used in the factories and workshops, moderate
amount of power can be transmitted, distance between two pulleys
should not more than 8 metres.
• V- belt- is mostly used in the factories and workshops, large amount of
power can be transmitted, two pulleys should very near to each other.
• Circular belt- used in the factories and workshops, great amount of
power can be transmitted for more than 8 meters distance.
11. Types of Flat Belt Drives
Open Belt Drive
• The open belt drive is used to transmit power between parallel shafts
rotating in the same direction.
12. Cross Belt Drive
• The crossed or twist belt drive is used to transmit power between
parallel shafts rotating in the opposite direction.
13. Quarter Turn Belt Drive
• The quarter turn belt drive is used transmit power between right
angled shafts.
14. Variable-Speed Belt Drive
• It is used for changing the speed of the driven shaft while the main or
driving shaft runs at constant speed.
15. Fast and Loose Pulley Drive
• A fast and loose pulley drive is used when the driven or machine shaft
is to be started or stopped whenever desired without interfering with
the driving shaft.
16. V-Belt Drive
• V-belts are made of fabric and cords moulded in rubber and covered
with fabric and rubber.
• Among flexible machine elements, perhaps V-belt drives have widest
industrial application.
• These belts have trapezoidal cross section and do not have any joints.
Therefore, these belts are manufactured only for certain standard
lengths.
• To accommodate these belts the pulleys have V shaped grooves which
makes them relatively costlier.
17. Nomenclature of V-belt
• The geometrical features of the belt section are indicated in the figure.
• The pitch line, which is also marked as N-A, is the neutral axis of the
belt section.
• The design calculations for V-belt drives are based on the pitch line or
the neutral axis.
• These belts are available in various sections depending upon power
rating.
18. Standard V-belt sections
• The standard V-belt sections are A, B, C, D and E. The table below
contains design parameters for all the sections of V-belt.
19. ROPE DRIVES
• When power is to be transmitted over long distances then belts cannot
be used due to the heavy losses in power. In such cases ropes can be
used.
• Ropes are used in elevators, mine hoists, cranes, oil well drilling,
aerial conveyors, tramways, haulage devices, lifts and suspension
bridges etc.
• two types of ropes are commonly used. They are fiber ropes and
metallic ropes. Fiber ropes are made of Manila, hemp, cotton, jute,
nylon, coir etc., and are normally used for transmitting power.
20. Cont...
• The fibre ropes operate successfully when the pulleys are about 60
metres apart, while the wire ropes are used when the pulleys are up to
150 metres apart.
• The wire ropes are made from cold drawn wires in order to have
increase in strength and durability. It may be noted that the strength of
the wire rope increases as its size decreases.
21. Cont..
• The wires are first given special heat treatment and then cold drawn in
order to have high strength and durability of the rope.
• The steel wire ropes are manufactured by special machines. First of
all, a number of wires such as 7, 19 or 37 are twisted into a strand and
then a number of strands, usually 6 or 8 are twisted about a core or
centre to form the rope.
• The core may be made of hemp, jute, asbsestos or a wire of softer
steel.
22. Classification of Wire Ropes
• Cross or regular lay ropes- In these types of ropes, the direction of
twist of wires in the strands is opposite to the direction of twist of the
stands.
• Parallel or lang lay ropes- In these type of ropes, the direction of twist
of the wires in the strands is same as that of strands in the rope.
• Composite or reverse laid ropes- In these types of ropes, the wires in
the two adjacent strands are twisted in the opposite direction.
24. Chain Drives
• The chains are mostly used to transmit motion and power from one
shaft to another, when the centre distance between their shafts is short
such as in bicycles, motor cycles, agricultural machinery, conveyors,
rolling mills, road rollers etc.
• The chains may also be used for long centre distance of up to 8 metres.
The chains are used for velocities up to 25 m / s and for power up to
110 kW.
25. Classification of Chain Drives
• Block or bush chain- This type of chain was used in the early stages of
development in the power transmission.
• It produces noise when approaching or leaving the teeth of the
sprocket because of rubbing between the teeth and the links. Such type
of chains are used to some extent as conveyor chain at small speed.
26. Bush Roller Chain
• It consists of outer plates or pin link plates, inner plates or roller link
plates, pins, bushes and rollers.
• A pin passes through the bush which is secured in the holes of the
roller between the two sides of the chain.
• The rollers are free to rotate on the bush which protect the sprocket
wheel teeth against wear.
28. Silent Chain
• It is designed to eliminate the evil effects caused by stretching and to
produce noiseless running.
• When the chain stretches and the pitch of the chain increases, the links
ride on the teeth of the sprocket wheel at a slightly increased radius.
• This automatically corrects the small change in the pitch.