The document discusses balancing of rotating masses. It explains static and dynamic balancing, and balancing of single and multiple rotating masses using balancing masses in the same plane and different planes. Methods for analytical and graphical determination of balancing masses are provided for single and multiple rotating masses. Conditions for static and dynamic balancing are outlined for cases where disturbing masses are balanced by masses in different planes as well as when multiple masses rotate in different planes.
Unit 5- balancing of reciprocating masses, Dynamics 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 4- balancing of rotating masses, Dynamics 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.
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
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
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 5- balancing of reciprocating masses, Dynamics 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 4- balancing of rotating masses, Dynamics 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.
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
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
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.
Design of flywheel theory and numericals prof. sagar a dhotareSagar Dhotare
1. Introduction.
2. Coefficient of Fluctuation of
Speed.
3. Fluctuation of Energy.
4. Maximum Fluctuation of
Energy.
5. Coefficient of Fluctuation
of Energy.
6. Energy Stored in a Flywheel.
7. Stresses in a Flywheel Rim.
8. Stresses in Flywheel Arms.
9. Design of Flywheel Arms.
10. Design of Shaft, Hub and
Key.
11. Construction of Flywheel.
A helical gear has teeth in form of helix around the gear. Two such gears may be used to connect two parallel shafts in place of spur gears. The helixes may be right handed on one gear and left handed on the other. The pitch surfaces are cylindrical as in spur gearing, but the teeth instead of being parallel to the axis, wind around the cylinders helically like screw threads.
BEST PPT FOR DOWNLOADING & SUBMISSION
INFORMATION IN POINTS
When the inertia forces are considered in the analysis of the mechanism, the analysis is known as dynamic force analysis.
Now applying D’Alembert principle one may reduce a dynamic system into an equivalent static system and use the techniques used in static force analysis to study the system.
Garcia and Bayo (1994), Wang and Wang (1998), Shi and Mc Phee (2000) were interested in the analytical and
experimental study of the dynamic response of these mechanisms
Unit-6: Gyroscope, of Dynamics 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.
Design of flywheel theory and numericals prof. sagar a dhotareSagar Dhotare
1. Introduction.
2. Coefficient of Fluctuation of
Speed.
3. Fluctuation of Energy.
4. Maximum Fluctuation of
Energy.
5. Coefficient of Fluctuation
of Energy.
6. Energy Stored in a Flywheel.
7. Stresses in a Flywheel Rim.
8. Stresses in Flywheel Arms.
9. Design of Flywheel Arms.
10. Design of Shaft, Hub and
Key.
11. Construction of Flywheel.
A helical gear has teeth in form of helix around the gear. Two such gears may be used to connect two parallel shafts in place of spur gears. The helixes may be right handed on one gear and left handed on the other. The pitch surfaces are cylindrical as in spur gearing, but the teeth instead of being parallel to the axis, wind around the cylinders helically like screw threads.
BEST PPT FOR DOWNLOADING & SUBMISSION
INFORMATION IN POINTS
When the inertia forces are considered in the analysis of the mechanism, the analysis is known as dynamic force analysis.
Now applying D’Alembert principle one may reduce a dynamic system into an equivalent static system and use the techniques used in static force analysis to study the system.
Garcia and Bayo (1994), Wang and Wang (1998), Shi and Mc Phee (2000) were interested in the analytical and
experimental study of the dynamic response of these mechanisms
Unit-6: Gyroscope, of Dynamics 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- Governers , Dynamics 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 3- friction and belt drives, Dynamics 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.
gyroscope is a chapter of theory of machine. You can easily understand concepts of gyroscope in my ppt. All concepts are with suitable examples and graphics.
saurabh.rana2829@gmail.com
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.
Inertia effect of crank and connecting rod
single cylinder engine
balancing in multi cylinder-inline engine
– primary & Secondary forces
V-type engine
Radial engine – Direct and reverse crank method
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
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.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
2. Unit 4: Balancing of Rotating Masses
• Static and dynamic balancing
• Balancing of single rotating mass by balancing
masses in same plane and in different planes.
• Balancing of several rotating masses by
balancing masses in same plane and in different
planes.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
2
3. What is Balancing ?
• Often an unbalance of forces is produced in rotary or
reciprocating machinery due to the inertia forces
associated with the moving masses.
• Balancing is the process of designing or modifying
machinery so that the unbalance is reduced to an
acceptable level and if possible is eliminated entirely.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
3
4. • A particle or mass moving in a circular path experiences a centripetal
acceleration and a force is required to produce it.
• An equal and opposite force acting radially outwards acts on the axis
of rotation and is known as centrifugal force .
• This is a disturbing force on the axis of rotation, the magnitude of
which is constant but the direction changes with the rotation of the
mass.
• In a revolving rotor, the centrifugal force remains balanced as long as
the centre of the mass of the rotor lies on the axis of the shaft.
• When the centre of mass does not lie on the axis or there is an
eccentricity, an unbalanced force is produced
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
4
5. Why Balancing is necessary?
• The high speed of engines and other machines is a
common phenomenon now-a-days.
• It is, therefore, very essential that all the rotating and
reciprocating parts should be completely balanced as
far as possible.
• If these parts are not properly balanced, the dynamic
forces are set up.
• These forces not only increase the loads on bearings
and stresses in the various members, but also produce
unpleasant and even dangerous vibrations.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
5
6. Balancing of Rotating Masses
• Whenever a certain mass is attached to a rotating shaft, it
exerts some centrifugal force, whose effect is to bend the
shaft and to produce vibrations in it.
• In order to prevent the effect of centrifugal force, another
mass is attached to the opposite side of the shaft, at such a
position so as to balance the effect of the centrifugal force
of the first mass.
• This is done in such a way that the centrifugal force of both
the masses are made to be equal and opposite.
• The process of providing the second mass in order to
counteract the effect of the centrifugal force of the first
mass, is called balancing of rotating masses.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
6
7. Balancing of Rotating Masses
• The following cases are important from the subject point of
view:
1. Balancing of a single rotating mass by a single mass rotating in
the same plane.
2. Balancing of a single rotating mass by two masses rotating in
different planes.
3. Balancing of different masses rotating in the same plane.
4. Balancing of different masses rotating in different planes.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
7
8. Balancing of a Single Rotating Mass By a Single Mass Rotating in the
Same Plane
• Consider a disturbing mass m1 attached to a shaft rotating at ω rad/s as shown in
Fig.
• Let r1 be the radius of rotation of the mass m1 (i.e. distance between the axis of
rotation of the shaft and the centre of gravity of the mass m1).
• We know that the centrifugal force exerted by the mass m1 on the shaft,
• This centrifugal force acts radially outwards and thus produces bending moment on
the shaft.
• In order to counteract the effect of this force, a balancing mass (m2) may be
attached in the same plane of rotation as that of disturbing mass (m1) such that
the centrifugal forces due to the two masses are equal and opposite.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
8
9. Balancing of a Single Rotating Mass By a Single Mass Rotating in the
Same Plane
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
9
10. Balancing of a Single Rotating Mass By Two Masses Rotating in
Different Planes
• In the previous arrangement for balancing gives rise to a couple which tends to
rock the shaft in its bearings.
• Therefore in order to put the system in complete balance, two balancing masses
are placed in two different planes, parallel to the plane of rotation of the disturbing
mass, in such a way that they satisfy the following two conditions of equilibrium.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
10
The conditions (1) and (2) together give
dynamic balancing.
11. Balancing of a Single Rotating Mass By Two Masses
Rotating in Different Planes
• The following two possibilities may arise while
attaching the two balancing masses :
1. The plane of the disturbing mass may be in between
the planes of the two balancing masses, and
2. The plane of the disturbing mass may lie on the left or
right of the two planes containing the balancing
masses.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
11
12. 1. When the plane of the disturbing mass lies in between the planes
of the two balancing masses
• Consider a disturbing mass m lying in a plane A to be balanced by two rotating
masses m1 and m2 lying in two different planes L and M as shown in Fig.
• Let r, r1 and r2 be the radii of rotation of the masses in planes A, L and M
respectively.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
12
14. • It may be noted that equation (i) represents the condition for static
balance, but in order to achieve dynamic balance, equations (ii) or (iii)
must also be satisfied.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
14
15. When the plane of the disturbing mass lies on one end of the planes of
the balancing masses
• In this case, the mass m lies in the plane A and the balancing masses
lie in the planes L and M, as shown in Fig.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
15
16. As discussed above, the following conditions must be satisfied in order
to balance the system, i.e.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
16
17. Balancing of Several Masses Rotating in the Same Plane
• The magnitude and position of the balancing
mass may be found out analytically or
graphically as discussed below :
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
17
18. 1. Analytical method
• The magnitude and direction of the balancing mass may be obtained, analytically,
as discussed below :
1. First of all, find out the centrifugal force exerted by each mass on the rotating shaft.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
18
19. 2. Graphical method
• The magnitude and position of the balancing mass may also be
obtained graphically as discussed below :
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
19
24. Balancing of Several Masses Rotating in Different Planes
• When several masses revolve in different planes, they may be transferred to a
reference plane (briefly written as R.P.), which may be defined as the plane passing
through a point on the axis of rotation and perpendicular to it.
• The effect of transferring a revolving mass (in one plane) to a reference plane is to
cause a force of magnitude equal to the centrifugal force of the revolving mass to
act in the reference plane, together with a couple of magnitude equal to the
product of the force and the distance between the plane of rotation and the
reference plane.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
24
25. Balancing of Several Masses Rotating in Different Planes
• In order to have a complete balance of the several revolving masses
in different planes, the following two conditions must be satisfied :
1. The forces in the reference plane must balance, i.e. the resultant force must
be zero.
2. The couples about the reference plane must balance, i.e. the resultant couple
must be zero.
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
25
26. Balancing of Several Masses Rotating in Different Planes
• Let us now consider four masses m1, m2, m3 and m4 revolving in planes 1, 2, 3 and
4 respectively as shown in Fig. (a).
• The relative angular positions of these masses are shown in the end view [Fig. (b)].
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
26
27. The magnitude of the balancing masses mL and mM in planes L and M
may be obtained as discussed below :
11/6/2014
Hareesha N G, Dept of Aero Engg, DSCE,
Blore
27
38. 11/6/2014 Hareesha N G, Dept of Aero Engg, DSCE, Blore 38
It is assumed that the mass of pulley B acts in vertical direction.
For the static balance of the pulleys, the centre of gravity of the system
must lie on the axis of rotation. Therefore a force polygon must be a
closed figure.