These notes are according to the r09 syllabus book of jntu. Video lecture on definition of shaft and its explanation from design of shafts, keys and couplings chapter of design of machine for mechanical engineering students. Shaft stress calculations shaft 1 diameter38 material. The findings suggest that a spliced column can be considered equivalent to a prismatic euler column, with an appropriate effective length, for design purposes. Chakraborty, department of mechanical engineering, iit kharagpur. Those with bearings moved farther faster, and history has yet to stop.
You can find them according to your branch and subject in the below link national mission on education through ict this was initiated by iit madras. Freely browse and use ocw materials at your own pace. What are the available standard sizes of shafts in market and also mentioned few main shaft suppliers in canada. Design of shafts couplings ppt linkedin slideshare. Depending upon the type and accuracy of motion desired. Perform stress analysis of shaft on any cad software and compare. Nptel, an elearning initiative by the 7 indian institutes of technology and the indian institute of science with the support of the mhrd, govt. Guidance for the design of spliced columns journal of. It is required to calculate the mean stress and stress amplitude for all the loads, namely, axial, bending and torsion. Unit 3 press and press tools press and press tools structure 3. Criteria for the design of axially loaded drilled shafts. The shaft will have the least possible amount of metal at a lower limit of 39.
Lesson 2 design of shaft for variable load and based on stiffness. Determine torque in shafts from gears, pulleys, sprockets, clutches, and couplings. Lecture series on design of machine elements i by prof. When pinion is the driver, it results in step down drive in which nptl output speed. These critical points may differ from joint to joint. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray.
Once a problem is identified, it will usually yield to an. Aug 07, 2017 david will show the benefits gained from embedding interactive 3d data into pdf files 3d pdf to create enhanced technical documents that are low cost, easy to use and are simplifying document creation, sharing and communicating beyond the engineering department. Reducing stress concentration at shoulder fillet bearings often require relatively sharp fillet radius at shoulder if such a shoulder is the location of the critical stress, some. Determine allowable force on gear teeth, including the factors necessary due to. Mechanical engineering design project mech 390 shaft. Worm gear sets consists of a helical gear and a power screw worm, used to transfer motion between non parallel and nonintersecting shafts. Nptel provides elearning through online web and video courses various streams. Helical gears have teeth inclined to the axis of rotation. To prevent solid buildup on the bottom, a radialblade impeller may be used. Nptel engineering design creative engineering design. So, you want to download all of the video lectures for a course in nptel. Can design key to be weakest link to fail in case of overload shigleys mechanical engineering design. A gear can be defined as a toothed wheel which, when meshed with another toothed wheel with similar configuration, will transmit rotation from one shaft to another.
A double reduction gearbox design has developed to the point that the general layout and axial dimensions of the countershaft carrying two spur gears has been proposed, as shown in fig. Design of shaft for variable load and based on stiffness nptel. Calculate forces on teeth of spur gears, including impact forces associated with velocity and clearances. Find bending moments from gears, pulleys, or sprockets that are transmitting loads to or from other devices. Design of shaft a shaft is a rotating member usually of circular crosssection solid or hollow, which transmits power and rotational motion. The shaft is generally acted upon by bending moment, torsion and axial force.
In other words, a square key is equally strong in shearing and crushing. Design of machine elements nptel online videos, courses iit video lectures. This guide represents a starting point for a variety of the concepts and considerations necessary to initiate a bearing design, and it reinforces our readiness to work together. Shafts are usually available up to 7 meters length due to inconvenience in transport.
Design of column base plates islamic university of gaza. Spur gear design and selection objectives apply principles learned in chapter 11 to actual design and selection of spur gear systems. Learn for free, pay a small fee for exam and get a certificate. Maiti, department of mechanical engineering, iit kharagpur. Another class of gear train has wide application, the epicyclic or planetary train. Design engineers must be good at identifying problems. Hydraulic design of sewers and storm water drains lecture 7. Increased aerodynamic efficiency elliott uses stateoftheart interactive design. Mechanical engineering design of machine elements i nptel. This will be the case unless the shaft is overloaded or. Building materials and construction 140602 engineering geology 140604.
What are the difference between pipe flow and free surface flow. Sep 09, 2012 a discussion on the variation of the loadcarrying capacity with the level of imperfections on a practical spliced column is also presented. In order to have a greater length, it becomes necessary to join two or more pieces of the shaft by means of a coupling 3. Pinion small gear gear large gear internal gears helical gears teeth are inclined to the axis of rotation, the angle provides more gradual engagement of the teeth during meshing, transmits motion between parallel shafts.
Helical gears are not as noisy, because of the more gradual engagement of the teeth during meshing. So, the design process is different for each joint as it is concentrated in different weak links that may exist within a specific joint. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Compute forces acting on shafts from gears, pulleys, and sprockets. For the love of physics walter lewin may 16, 2011 duration. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Pumps and pumping system bureau of energy efficiency 116 figure 6. Files are made in various lengths, shapes, and cuts. The material used for shafts should have the following properties. Impellers are generally made of bronze, polycarbonate, cast iron, stainless steel as well as other materials. It is required to calculate the mean stress and stress amplitude for. You will find all pdf s and also as mp3 file for all video lectures which are in nptel. The scope of this report is to assess the bedp of the proposed facility. Why did some civilizations discover bearings and others did not.
Find materials for this course in the pages linked along the left. Aisi s10012 north american specification naspec international building code ibc 2015 coldformed structural framing products technical design. Each shaft is designed for mechanical loads and critical shaft speed. Basic engineering design package bedp after thorough analysis of the datainformation furnished by nrl. Unifying software for marine propulsion shaft design technology shaftdesigner is an innovative computer aided engineering cae software to support the design, installation, maintenance and repair of marine propulsion shafts. Design of shaft primarily involves in determining stresses at critical point in the shaft. Design method for variable load equivalent stress on shaft design based on stiffness and torsional rigidity critical speed of shaft 8.
Furthermore, the location of the pure rolling lines has been derived without the zero net friction force assumption, which should allow the reader to better predict the bearing kinematics and hence ball cage pocket clearance and better calculate the friction moments. In order to find the length of the key to transmit full power of the shaft, the. What is the difference between steady and unsteady flow. Lecture series on design of machine elementsi by prof. Pdf 3d analysis and design of surge shaft chambers for. It is the algebraic difference between the minimum limit of size and its corresponding basic size. B maiti, department of mechanical engineering,iit kharagpur. Tm 9243 types and uses files are used for cutting, smoothing off, or removing small amounts of metal, wood, plastic, or other material. Civil engineering department civil engineering department. The type and design of frame depending on the design of frame these are classified as inclinable, straight side, adjustable bed, gap frame, horning and open. Dmm 2 pdf notes dmm 2 notes pdf file to download are listed below please check it. Basic definitions iso system for tolerance specification tolerance design for assembly fits design of limit gages taylors principle. Design of shaft new jersey institute of technology. If elected, then place the blade one blade width off the bottom.
This voltage upon filtering is used as the control signal for the vcovcm vcm. Lecture notes tribology mechanical engineering mit. Shafts are designed on the basis of strength or rigidity or both. How to design a shaft under different loads and stress. What is the difference between rotational and irrotational flow. As a result, elliotts multistage centrifugal compressors lead the industry in both performance and reliability. Db equals preload value in pounds r6 cages fnone, full complement rtwopiece ribbon, steel r6riveted ribbon, steel b2twopiece. Pdf design optimization of automotive propeller shafts. Lecture notes design and manufacturing ii mechanical. A larger shaft to take the torque will require more horsepower to eliminate wobble. Know behaviour and properties of engineering materials pertaining to design. If you are not able to download lectures due to bandwidth constraints, you can obtain the courses in dvds by paying a nominal fee to cover the cost of storage media and distribution. Civilstructural engineering personnel shall demonstrate an expertlevel knowledge of the requirements of doestd10202002, natural phenomena hazards design and evaluation criteria for department of energy facilities.
Nptel, online courses and certification, learn for free. Design based on rigidity is to ensure that maximum deflection because of bending and maximum twist due to torsion of the shaft is within the allowable limits. A mat foundation is to be design by the conventional method. Nptel material is available for free on nptel website. A gear whose axis itself is revolving is called a planetary gear. Lecture notes elements of mechanical design mechanical. In r and r15,8units of r09 syllabus are combined into 5units in r and r15. The application of geometric dimensioning and tolerancing techniques using the customary inch systems by lowell w.
The design of machine members 2 pdf notes dmm 2 notes pdf file. Kinematic analysis of synchromesh, machine tool gear box, differential gear box self study 3. In design of a beamtocolumn joint, there exist a number of weak links critical points where the design process is concentrated. It is intended to be just one part of the total resource package we provide to our customers in support of their success. The gears and bearings are located and supported by shoulders, and held in place by retaining rings. Civil structural engineering us department of energy. The diffuser also called as volute houses the impeller and captures and directs the water off the impeller. Epicyclic gear train nptel pdf automatic transmission has not better fuel economy. It is the algebraic difference between the actual size and its corresponding basic size. This is designated as ei for a hole and as ei for a shaft.
It is integral to any mechanical system in which power is transmitted from a prime mover, such as an electric motor or an engine, to other rotating parts of the system. Rack and pinion sets a special case of spur gears with the gear having an infinitely large diameter, the teeth are laid flat. Bevel gears have teeth formed on conical surfaces and are used mostly for transmitting motion between intersecting shafts. Design of machine elements nptel online videos, courses. Handbook to best practices for mine shafts protection. Gear train it is defined as two or more gears are made to mesh with each epicyclic gear train the axes of the shafts over which the geaar are mounted, may move relative to a fixed axis. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. What is the difference between uniform and non uniform flow. In some epicyclic gear trains, we may find two or more. Shaft design calculation pdf and generated in shaft and bearing calculations. Structures generally consist of walls in hollow blocks, metal dams or concrete plugs. Computer aided design nptel online videos, courses iit video lectures. A shaft of circular crosssection of diameter 50 mm is supported in two bearings at a distance of 1 m. It depends on the accuracy of mounting, bearings, shaft deflection and.
Compare combined stresses to suitable allowable stresses. Group effects are small in most soils for bridge bent foundations, in which shafts are usually widely spaced. Whenever you think you have a good design, invert it, think of using a completely different type of bearing or mounting, and compare it to what you originally considered. Gear design national broach and machine division,of lear siegler, inc. Design and analyze different machine components such as shaft, key, coupling, lever, power screw etc. A mass of 20 kg is attached to the shaft such that its centre of gravity is 5 mm from the axis. Unifying software for marine propulsion shaft design.
Cad cam systems pdf notes free download, computer aided design pdf notes introduction. Shaft design objectives compute forces acting on shafts from gears, pulleys, and sprockets. Spur gear design nptel indian institute of technology. Cadcam method is widely used to explain any software system capable of describing parts with geometry. Nptel syllabus queuing systems web course course outline introduction, markov chains and markov processes, birthdeath processes, simple queueing models mm queues, queues with batch arrivals, mg1 queue with residual life and imbedded markov chain approach, queues with vacations, bulk. Shaft design and analysis a shaft is the component of a mechanical device that transmits rotational motion and power. Stress analysis assuming a solid shaft with round cross section, appropriate geometry terms can be introduced for c, i, and j resulting in the fluctuating stresses duedueobed gadoso as to bending and torsion as combining these stresses in accordance with the distortion energy failure. Pdf tehri hydroelectric project is located on the bank of river bhagirathi in the state of uttarakhand, india. Design of matraft foundation mat or raft foundation is a large concrete slab supporting several columns in two or more rows.
Design of machine members 2 pdf notes dmm 2 notes pdf. Machine elements such as gears, pulleys sheaves, flywheels, clutches, and sprockets are mounted on the shaft and are used to transmit power from the driving device motor or engine through a machine. How to download all of the lectures in pdf for a course in. It is used where the supporting soil has low bearing capacity. For old mine shafts, galleries may have been closed with remaining items but without particular design. Design based on strength is to ensure that stress at any location of the shaft does not exceed the material yield stress. Computer aided design nptel online videos, courses iit. Grindstone dressing proper shaft machining methods how to minimize shaft wear. Impeller, which is the only moving part, is attached to a shaft and driven by a motor. Type order phaselocked loop design fundamentals application note, rev. Pande mechanical engineering department indian institute of technology, bombay 1. How to download all of the lectures for a course in nptel quora.
Criteria for shaft design are described and methods of design developed. Design of column base plates typical column bases, as shown below, consist of a single plate fillet welded to the end of the. Cad cam systems pdf notes free download, computer aided. Web courses are available in html format, pdf downloads with illustration, animation 2d, 3d, lab demos, video clippings. Cutting tool design nageswara rao posinasetti january 29, 2008 nageswara rao posinasetti 2 elements of machining cutting tool tool holding guiding device work piece machine tool january 29, 2008 nageswara rao posinasetti 3 chip formation cutting tool harder and wear resistant than the workpiece material interference between the tool and. Nptel mathematics video lecture online study material.
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