Gear trains are widely used in all kinds of mechanisms and machines, from can openers to aircraft carriers. Up next types of gear trains basic, formula and numerical problems approach for gate duration. Gate 2019 mechanical engineering syllabus contains engineering mechanics, mechanics of materials, theory of machines, vibrations, machine design, fluid mechanics, heattransfer, thermodynamics, engineering materials, casting, forming and joining processes, machining and machine tool operations, metrology and inspection, computer integrated manufacturing, production planning and control. The first experimental tilting train concept was the pendulumsuspension chair cars designed by the pacific railway equipment company. Ugears steam locomotive mechanical 3d model of train. Provide means of connection and disconnection of engine with rest of power train without shock and smoothly. Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. This video is part of the content developed by nptel, a joint initiative of all iits and iisc. A gear train is a mechanical system formed by mounting gears on a frame so that the teeth of the gears engage. Ugears steam locomotive i would recommend this to a friend. Calculation of a planetary gear train this tutorial shows the usage of mesys shaft calculation with shaft systems. Lecture 39 gear train, internal and epicyclic gearing infocobuild.
Video lesson mechanical engineering theory of machines video lecture training. Enable power transmission at varied angles and varied lengths. Used to change theused to change the direction of rotation or to connect two shafts at a distance. Introduction to gear trainsintroduction to gear trains. Tooth load and torque calculations in epicyclic gear trains. Gear trains theory of machines engineering reference with. Theory of machines is an applied science of the relationships between geometry and relative motion of the parts of the machine, and concerns to the forces which. Nptel transportation engineering nptel engineering video. Asok kumar mallik department of mechanical engineering iit kanpur. Involutes profile is generally utilized for gears however they have problem of interference that can be avoided by utilizing any one of the various methods proposed in the last unit. Mechanical engineering video lectures from nptel, iit, mit. Compound train example to obtain the gear ratio, tv output rateinput rate, of a compound gear train, an illustrated example is presented in this section.
Simple gear trains, compound gear trains for large speed reduction, epicyclic gear trains algebraic and tabular methods of finding velocity ratio of epicyclic gear trains. Nptel, iit, lectures, courses, video, engineering, online. Which are the best and worst video lectures made by the. Chakraborty, department of mechanical engineering, iit kharagpur. Velocity ratios and gear trains for the gear train shown below, determine the train value, output speed, output direction, output torque, and output power. Dec 05, 2015 gear trains are widely used in all kinds of mechanisms and machines, from can openers to aircraft carriers. Let t1 number of teeth on gear 1, r1 pitch circle radius of gear 1, and n1 speed of gear 1 in r. This was the first time i hit a home run with my 12years old son anthony jr. Mechdesigner software makes it easy to add gear pairs that will transmit motion and force naturally through the mechanisms linkages.
This section provides the schedule of lecture topics along with lecture slides and. Jun 28, 2014 lecture series on design of machine elements i by prof. You can model most gear design arrangements and gear trains. The first prototype, with an articulated bogie system, was built in 1937 and tested on the atchison, topeka and santa fe railway that year. In gear train, combination of two or gears are used to transmit power. Kinematics of gears and gear trains it is decided that the topics on dynamics listed above i to v will be covered in the course on dynamics of machines whereas the topic a above will be covered in kinematics of machines course. Ii lecture 36 force analysis examples lecture 37 gear kinematics lecture 38 gear trains i lecture 39 gear trains ii lecture 40 gear trains iii.
Dynamic analysis of slidercrank mechanism,gear trains,fly. Contents of power system protection lecture, iit bombay. Following are the different types of gear trains, depending upon the arrangement of wheels. Lecture 44 machine tools speed change gear unit cont.
Help me to find this epicyclic gear train nptel pdf gdar excel. Gear trains train of gears widely used on machines to transfer motion from one. Gear design software to model most gear arrangements. Autoplay when autoplay is enabled, a suggested video will automatically play next. In this train, the smaller gears are onefifth the size of the larger gears. In the same way, you could attach a 2,500rpm motor to the red gear. The gear train is classified into following types, simple gear train compound gear train riveted gear train epicyclic gear train 1. Gear trains, kinematics of machines, assignment help. The earliest known reference to gear trains is in a treatise by hero of alexandria c. In these trains the gears typically orbit each other. The gear 3 which is now the second driver drives the gear 4 i.
In the first three types of gear trains, the axes of the shafts over which the gears are mounted are fixed relative to each other. Lecture gear unit design failure of gear tooth probable dynamic load and wear load. In this unit, the analysis of gears is presented to you. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. Your browser does not currently recognize any of the video formats available. N is the gears teeth number, the sign depends on the type of gear and, in sequence is for external gears. Gear trains often consist of multiple gears in the train, as shown in the following two figures. A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage. Sep 04, 2012 materials today is a community dedicated to the creation and sharing of materials science knowledge and experience. A gear is essentially a toothed wheel or cylinder that works in tandem with another gear or gears to transmit motion, or to change speed or direction. Design of machinery an introduction to the synthesis and. Surveying nptel online videos, courses iit video lectures. Detailed course content with modules for video lectures module 1 3 hr. This can be used to generate some interesting alternatives.
Types of gear trains basic, formula and numerical problems approach for gate duration. Me 380 september 1, 2004 gear train analysis it is very common to use a gear train following a fractionalhorsepower motor in servo positioning applications. Simple compoundgear train n n n n t t t t r nn nn rr rr 26 tttt 16 15 14 15 14 12 23. A small gear and a larger gear are connected together, one on top of the other. Nptel lectures power system protection and switchgear. The righthand purple gear in the train is actually made in two parts, as shown. You can edit and analyze all of its kinematic properties. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. According to me, some of the best videos for mechanical are. Enable speed reduction between engine and the drive wheels in. This is achieved by modeling each rigid gear body as a system of 3 equations, the input and output gears as one linear equation each, and then modeling the connection between gears as another linear equation derived from newtons second law.
Gears is a positive drive which transmits exact velocity ratio from one shaft to another shaft, gear drive is used when the distance between driver and follower is very less, when two or more gears are made to mesh with each other to transmit power from one shaft to another, the combination is called gear trains. That means that if you connect the purple gear to a motor spinning at 100 revolutions per minute rpm, the green gear will turn at a rate of 500 rpm and the red gear will turn at a rate of 2,500 rpm. Epicyclic gears have many applications, such as automatic transmissions in automobiles. A twostage planetary gear stage is defined using the program.
Compound gear train in this type, two or more gears are. Types of gear trains basic, formula and numerical problems. Thus we see that in a reverted gear train, the motion of the first gear and the last gear is like. The procedure is to start with the input, and to calculate how the angular velocity propagates through each successive intermeshing pair of gears based upon the number of teeth. Feb 23, 2017 types of gear train basic, formula and numerical problems of gate previous year questions with solution approach theory of machine, in this video tutorial you will learn about all types of gear. Simple gear train in this type, there is only one gear is mounted on each shaft. Kinematics of machines nptel online videos, courses iit. Kinematics of machines nptel online videos, courses. This video leads students through using linear algebra to model a gear train. Gears and gear trains study notes for mechanical engineering. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. Lecture notes design and manufacturing i mechanical.
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. Gate mechanical engineering theory of machines video lecture. Nptel provides elearning through online web and video courses various. Textile engineering mechanics of textile machinery nptel. Gear trains linearity videos stem concept videos mit. Nptel provides elearning through online web and video courses various streams. A gear train is a set or system of gears arranged to transfer rotational torque from one part of a mechanical system to another, with some gear ratio performing a mechanical advantage. 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. Transportation engineering video lectures, transportation engineering course videos, nptel transportation engineering, transportation engineering video classes, transportation engineering online videos, civil engineering video lectures, nptel video lectur.