screw jack , description of screw jack, advantages of screw jack, application of screw jack, industrial and technical application, working principle of screw jack, details of screw jack, 3D cad drawing of screw jack.
This Presentation presents the design of Rivet joints which are also called boiler joints. It contains various parameters upon which boiler joints are designed. Pls find and enjoy.
This Presentation presents the design of Rivet joints which are also called boiler joints. It contains various parameters upon which boiler joints are designed. Pls find and enjoy.
This is a power point presentation on the design of Helical springs subjected to Static and Fluctuating load. It is part of Design of Machine elements subject.
Power shovel is a bucket equipped constuction equipment used for excavating and transporting all classes of earth (except solicd rocks without prior loosening) to nearby trucks or other hauling equipments.
Maximum principal stress theory.
Maximum shear stress theory.
Maximum shear strain theory.
Maximum strain energy theory.
Maximum shear strain energy theory.
This is a power point presentation on the design of Helical springs subjected to Static and Fluctuating load. It is part of Design of Machine elements subject.
Power shovel is a bucket equipped constuction equipment used for excavating and transporting all classes of earth (except solicd rocks without prior loosening) to nearby trucks or other hauling equipments.
Maximum principal stress theory.
Maximum shear stress theory.
Maximum shear strain theory.
Maximum strain energy theory.
Maximum shear strain energy theory.
A mechanical seal is a sealing device which forms a running seal between rotating and stationary parts. They were developed to overcome the disadvantages of compression packing. Leakage can be reduced to a level meeting environmental standards of government regulating agencies and maintenance costs can be lower.
Analysis of hydrodynamic fixed pad bearing to reduce vibration by replacing f...ijsrd.com
Rotating machineries are always subject to vibrations due to critical speeds, unbalance, and instability. Usually the least expensive modification of a machine to make is the bearing. A wide variety of bearings have been developed to combat some of the different types of vibration problems. This report consist the analysis of 360deg hydrodynamic bearing of Boiler Feed water Pump. The boiler feed water pump is very critical rotatory equipment of Thermal power plant the bearing of this pump must be able to withstand in vibration and other hydraulic forces while still maintaining a high degree of reliability. This report consist analysis and design of 360 hydrodynamic bearing also replacing fixed pad by flexural pad and analysis bearing vibration and compare vibration for the same condition with the help of FEM Method in ANSYS.
Read how Superbolt resolves your bolting problems!
Superbolt™ Multi Jackbolts Tensioner (USA):
- Useful for Larger size bolts, from M24 onwards, as only Hand Tools are required during tightening & removal
- Eliminates Galling, Fretting and Bolt Seizure Problems
- Reduce equipment downtime and improves work efficiency
- Reduce Maintenance costs
- Increase SAFETY aspect
- Preload Accuracy +/- 10%
Selection criteria and design of a chain used for Lifting Applicationijsrd.com
Lifting chain is designed for use with hoists, cranes, winches, and other material handling equipment. It is also used in rigging slings and for lashing. There are two standard grades for lifting chain: grade 80 lifting chain and grade 100 lifting chain. Grade 80 lifting chain is made from alloyed steel and is specifically designed for overhead lifting applications. This grade of lifting chain has a good strength-to-weight ratio and excellent durability. Grade 100 lifting chain is also made of alloyed steel, but is hardened and tempered for superior durability and fatigue resistance. Most Grade 100 lifting chain is made of Herc-Alloy 800, a heat-treated alloy with very high strength. Although many types of chain fittings are available, Grade 80 fittings should not be used with Grade 100 chain. Selecting lifting chain requires an analysis of performance specifications. Lifting chain size is measured in inches (in.) or millimeters (mm). Common sizes include 7/32 in. (5.5 mm), 9/32 in. (7.0 mm), 5/16 (8.0 mm), 3/8 (10.0 mm), 1/2 in. (13.0 mm), 5/8 in. (16.00 mm), 3/4 in. (20.0 mm), 7/8 in. (26 mm), and 1 1/4 in. (32.0 mm). Nominal dimensions include inside length and inside width. Other important considerations for choosing lifting chain are the approximate number of links per foot (ft.) and the approximate weight (lbs.) per 100 ft. When working with lifting chain, working load limit and rated capacity vary with the angle of use and the number of lifting chain used in a sling. For example, a single 5.5 mm lifting chain may be rated for 2100 lbs. at 90 degrees. A double 5.5 mm lifting chain may be rated for 60, 45, or 30 degree use with working loads of 3600, 3000, and 2100 lbs. respectively. Lifting chain should meet requirements from organizations such as the U.S. Occupational Safety and Health Administration (OSHA), the American Society for Testing Materials (ASTM), and the International Standards Organization (ISO). Working load limits for Grade 80 and Grade 100 lifting chain are based on a 4 to 1 design factor from ISO. By testing all these parameters of chain we can easily select the required dimension of chain link for lifting purpose.
Similar to Screw jack and its application and advantages with 3D PROE drawing (20)
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
How libraries can support authors with open access requirements for UKRI fund...
Screw jack and its application and advantages with 3D PROE drawing
1. Screw jack
What is a screw jack:-
A jackscrew, or screw jack, is a type of jack that is operated by turning
a leadscrew. It is commonly used to lift moderately heavy weights, such
as vehicles. More commonly, it is used as an adjustable support for
heavy loads, such as the foundations of houses or large vehicles.
Description:-
A screw jack consists of a heavy-duty vertical screw with a load table
mounted on its top, which screws into a threaded hole in a stationary
support frame with a wide base resting on the ground. A rotating collar
on the head of the screw has holes into which the handle, a metal bar,
fits. When the handle is turned clockwise, the screw moves further out
of the base, lifting the load resting on the load table. In order to support
large load forces, the screw usually has either square threads
or buttress threads.
Advantages
An advantage of jackscrews over some other types of jack is that they
are self-locking, which means when the rotational force on the screw is
removed, it will remain motionless where it was left and will not rotate
backwards, regardless of how much load it is supporting. This makes
them inherently safer than hydraulic jacks, for example, which will
move backwards under load if the force on the hydraulic actuator is
accidentally released.
2. Applications:-
The large area of sliding contact between the screw threads means
jackscrews have high friction and low efficiency as power transmission
linkages, around 30%–50%. So they are not often used for continuous
transmission of high power, but more often in intermittent positioning
applications.
In heavy-duty applications, such as screw jacks, a square
thread or buttress thread is used, because it has the lowest friction and
wear.
Industrial and technical applications:-
In technical application such as actuators, an Acme thread is used,
although it has higher friction, because it is easy to manufacture, wear
can be compensated for, it is stronger than a comparably sized square
thread and it makes for smoother engagement.
The ball screw is a more advanced type of leadscrew that uses a
recirculating-ball nut to minimize friction and prolong the life of the
screw threads. The thread profile of such screws is approximately
semicircular (commonly a "gothic arch" profile) to properly mate with
the bearing balls. The disadvantage to this type of screw is that it is not
self-locking. Ball screws are prevalent in powered leadscrew actuators.
Jackscrews are also used extensively in aviation, and are used to raise
and lower horizontal stabilizers. The failure of a jackscrew on
a Yakovlev Yak-42 airliner due to design flaws resulted in the crash
of Aeroflot Flight 8641 in 1982. A similar failure on a McDonnell
Douglas MD-80, resulting from a lack of grease, brought down Alaska
AirlinesFlight 261 in 2000. In 2013, NationalAirlines Flight 102crashed
as a result of a MRAP armoured vehicle breaking loose and breaking
through the rear bulkhead, severing hydraulics lines and most
importantly, destroying the jackscrew, rendering the aircraft
uncontrollable. Investigators found that had the jackscrew not been
destroyed, the 747-400F may have been able to perform a successful
landing at Bagram Airfield.
3. Screw Jack Working Principle:-
Very common throughout the world, screw jacks are found wherever
there is a need to lift, position, align and hold load. Their high reliability
and synchronization makes screw jacks suitable for a wide variety of
uses that alternative methodsof handlingcannot achieve. This spectrum
of applications reaches across market sectors and includes Steel Works
Equipment, Water Processing, Pharmaceutical, Medical and Laboratory
Equipment, Packaging Equipment, Nuclear and Aerospace and General
Mechanical Handling. Additionally, screw jacks are increasingly finding
uses as alternatives to conventionally pneumaticand hydraulic systems.
A Screw Jack (also known as a Jack Screw, a Worm Screw Jack, a
Machine Screw Jack or a Lead Screw Jack) is a devise used to convert
rotational motion into linear motion. It utilises the property of a screw
thread providing a mechanical advantage i.e. it can be used to amplify
force.