V-belts are used to transmit power between pulleys that are close together. They are trapezoidal in shape and made of fabric, cords, and rubber. V-belts grip the pulleys through wedging action. There are five standard types of V-belts designated by letters A through E. V-belt drives have advantages over flat belt drives like compactness and positive power transmission. However, they are not suitable for applications requiring constant speed like synchronous machines. The ratio of tensions in a V-belt can be calculated using the coefficient of friction between the belt and pulley groove sides.
V-Belts are the most common type of drive belt used for power transmission. Their primary function is to transmit power from a primary source, like a motor, to a secondary driven unit. They provide the best combination of traction, speed transfer, load distribution, and extended service life.
“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.
V-Belts are the most common type of drive belt used for power transmission. Their primary function is to transmit power from a primary source, like a motor, to a secondary driven unit. They provide the best combination of traction, speed transfer, load distribution, and extended service life.
“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.
CONVEYOR
machine or thing that transports material from one place to another
CONVEYORS ARE USED:
• When material is to be moved frequently between specific points
• To move materials over a fixed path
• When there is a sufficient flow volume to justify the fixed conveyor investment
Design of Roller Chain Drive theory by Prof. Sagar A. DhotareSagar Dhotare
This covers following Points
1. Introduction.
2. Advantages and Disadvantages of Chain Drive over Belt or Rope Drive.
3. Terms Used in Chain Drive.
4. Relation Between Pitch and Pitch Circle Diameter.
5. Velocity Ratio of Chain Drives.
6. Length of Chain and Centre Distance.
7. Classification of Chains.
8. Hoisting and Hauling Chains.
9. Conveyor Chains.
10. Power Transmitting Chains.
11. Characteristics of Roller Chains.
12. Factor of Safety for Chain Drives.
13. Permissible Speed of Smaller Sprocket.
14. Power Transmitted by Chains.
15. Number of Teeth on the Smaller or Driving Sprocket
or Pinion.
16. Maximum Speed for Chains.
17. Principal Dimensions of Tooth Profile.
18. Design Procedure for Chain Drive.
CONVEYOR
machine or thing that transports material from one place to another
CONVEYORS ARE USED:
• When material is to be moved frequently between specific points
• To move materials over a fixed path
• When there is a sufficient flow volume to justify the fixed conveyor investment
Design of Roller Chain Drive theory by Prof. Sagar A. DhotareSagar Dhotare
This covers following Points
1. Introduction.
2. Advantages and Disadvantages of Chain Drive over Belt or Rope Drive.
3. Terms Used in Chain Drive.
4. Relation Between Pitch and Pitch Circle Diameter.
5. Velocity Ratio of Chain Drives.
6. Length of Chain and Centre Distance.
7. Classification of Chains.
8. Hoisting and Hauling Chains.
9. Conveyor Chains.
10. Power Transmitting Chains.
11. Characteristics of Roller Chains.
12. Factor of Safety for Chain Drives.
13. Permissible Speed of Smaller Sprocket.
14. Power Transmitted by Chains.
15. Number of Teeth on the Smaller or Driving Sprocket
or Pinion.
16. Maximum Speed for Chains.
17. Principal Dimensions of Tooth Profile.
18. Design Procedure for Chain Drive.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
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.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
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!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Cosmetic shop management system project report.pdfKamal Acharya
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
2. Introduction
We have already discussed that a V-belt is mostly used in factories
and workshops where a great amount of power is to be transmitted from one
pulley to another when the two pulleys are very near to each other. The V-belts
are made of fabric and cords moulded in rubber and covered with fabric and
rubber as shown in Fig (a). These belts are moulded to a trapezoidal shape and
are made endless. These are particularly suitable for short drives. The included
angle for the V-belt is usually from 30° to 40°. The power is transmitted by the
*wedging action between the belt and the V-groove in the pulley or sheave. A
clearance must be provided at the bottom of the groove as shown in Fig.(b), in
order to prevent touching of the bottom as it becomes narrower from wear.
3. The V-belt drive may be inclined at any angle with tight side either at top or bottom. In
order to increase the power output, several V-belts may be operated side by side. It may be
noted that in multiple V-belt drive, all the belts should stretch at the same rate so that the
load is equally divided between them. When one of the set of belts break, the entire set
should be replaced at the same time. If only one belt is replaced, the new unworn and
unstretched belt will be more tightly stretched and will move with different velocity.
4. f= distance between the axis of the section of
the outer groove and rim of the pulley
e= distance between the axes of the sections of
two grooves
w= pitch width
d = diameter of pulley
a= minimum height of groove above pitch line
c= minimum depth of groove below the pitch
line
2β= groove angle
5. Types of V-belts and Pulleys
According to Indian Standards (IS: 2494 – 1974), the V-belts are made in five types i.e. A,
B, C, D and E. The dimensions for standard V-belts are shown in Table 20.1. The pulleys
for V-belts may be made of cast iron or pressed steel in order to reduce weight. The
dimensions for the standard V-grooved pulley according to IS: 2494 – 1974, are shown in
Table 20.2
6. f= distance between the axis of the section of the outer groove and rim of the pulley
e= distance between the axes of the sections of two grooves
w= pitch width, d = diameter of pulley, a= minimum height of groove above pitch line
c= minimum depth of groove below the pitch line, 2β= groove angle
7. Standard Pitch Lengths of V-belts
According to IS: 2494-1974, the V-belts are designated by its type and nominal inside
length. For example, a V-belt of type A and inside length 914 mm is designated as A 914–
IS: 2494. The standard inside lengths of V-belts in mm are as follows :
610, 660, 711, 787, 813, 889, 914, 965, 991, 1016, 1067, 1092, 1168, 1219, 1295, 1372,
1397, 1422, 1473, 1524, 1600, 1626, 1651, 1727, 1778, 1905, 1981, 2032, 2057, 2159,
2286, 2438, 2464, 2540, 2667, 2845, 3048, 3150, 3251, 3404, 3658, 4013, 4115, 4394,
4572, 4953, 5334, 6045, 6807, 7569, 8331, 9093, 9885, 10 617, 12 141, 13 665, 15 189,
16 713
According to IS: 2494-1974, the pitch length is defined as the circumferential length of
the belt at the pitch width (i.e. the width at the neutral axis) of the belt. The value of the
pitch width remains constant for each type of belt irrespective of the groove angle.
The pitch lengths are obtained by adding to inside length: 36 mm for type A, 43 mm for
type B, 56 mm for type C, 79 mm for type D and 92 mm for type E. The following table
shows the standard pitch lengths for the various types of belt.
8.
9. Advantages and Disadvantages of V-belt Drive over
Flat Belt Drive
1. The V-belt drive gives compactness due to the small distance between centres of pulleys.
2. The drive is positive, because the slip between the belt and the pulley groove is negligible.
3. Since the V-belts are made endless and there is no joint trouble, therefore the drive is
smooth.
4. It provides longer life, 3 to 5 years.
5. It can be easily installed and removed.
6. The operation of the belt and pulley is quiet.
7. The belts have the ability to cushion the shock when machines are started.
8. The high velocity ratio (maximum 10) may be obtained.
9. The wedging action of the belt in the groove gives high value of limiting *ratio of tensions.
Therefore the power transmitted by V-belts is more than flat belts for the same coefficient of
friction, arc of contact and allowable tension in the belts.
10. The V-belt may be operated in either direction, with tight side of the belt at the top or
bottom. The centre line may be horizontal, vertical or inclined
10. Disadvantages
1. The V-belt drive can not be used with large centre distances, because of larger weight
per unit length.
2. The V-belts are not so durable as flat belts.
3. The construction of pulleys for V-belts is more complicated than pulleys of flat belts.
4. Since the V-belts are subjected to certain amount of creep, therefore these are not
suitable for constant speed applications such as synchronous machines and timing
devices.
5. The belt life is greatly influenced with temperature changes, improper belt tension and
mismatching of belt lengths.
6. The centrifugal tension prevents the use of V-belts at speeds below 5 m/ s and above 50
m / s.
11. Ratio of Driving Tensions for V-belt
A V-belt with a grooved pulley is shown in Fig. 20.2.
Let R1 = Normal reactions between belts and sides of
the groove.
R = Total reaction in the plane of the groove.
μ = Coefficient of friction between the belt and sides
of the groove.
Resolving the reactions vertically to the groove, we
have
R = R1 sin β + R1 sin β = 2R1 sin β
12. Consider a small portion of the belt, as in Art. 18.19, subtending an angle δθ at the
centre, the tension on one side will be T and on the other side (T + δT). Now proceeding
in the same way as in Art. 18.19, we get the frictional resistance equal to μ R. cosec β
against μ.R. Thus the relation between T1 and T2 for the V-belt drive will be
2.3 log (T1 / T2) = μ.θ cosec β