Ordinary gear trains have axes, relative to the frame, for all gears comprising the train. Whenever a change in the speed or torque of a rotating device is needed, a gear train or one of its cousins, the belt or chain drive mechanism, will usually be used. In the numerical of simple epicyclic gear train i have found out or calculated. Gear train numericals solved and explained, epicyclic gear train numericals solved, gear train tabular method, reverted gear train problems solved, gear train tabular method, epicyclic gear. This method is extremely methodical, which is appropriate since use of intuition is quite futile with an epicyclic gear train such as the following example. Design of machinery an introduction to the synthesis and. Analysis on the selection of tooth number for closed. On the embedded kinematic fractionation of epicyclic gear. The method is general and easily applied to multidegree of freedom systems.
In the numerical of simple epicyclic gear train i have found out or calculated the speed. The stationary gear sun gear or ring gear can be referred to as the central gear. For our gear train project, we originally had several different ideas. The method combines the accuracy of the willis analytical method with the clarity of the graphic method of kutzbachsmirnov. Pdf design, load analysis and optimization of compound. However, the replacement motors 62201 and 62204 for those models have internal ball bearings. Departmentpec university of technology chandigarh india department of mechanical engineering islamic azad, universitytakestan branch. A, townsend abstract a method of analysis of planetary gear transmission systems is extended here to include the case of idler planets. We use the method introduced in epicyclic ratio calculation for determining the final gear ratio of an epicyclic gear train. So the absolute speed of a gear is the relative speed with respect to the shaft plus the shafts speed with respect to ground. The following two methods may be used for finding out the velocity ratio of an epicyclic gear train. An alternative method for kinematic and power analysis of compound gear train is studied, which uses the torques and lever analogy of a given gear. Internal ringgear, three planets on spiderarm and the sun gear as semipictorial fig. In this lecture i have discussed about the numerical problem on simple epicyclic gear train from theory of machines in hindi.
The method of claim 1 wherein said locally stored database is stored on a write once read many cdworm. It may be regarded as a set of four rigid bodies because. Following are the different types of gear trains, depending upon the arrangement of wheels. For train identification two different methods are tested. The method is based on the concept of fundamental circuit corresponding to a basic epicyclic gear train. The gear tooth thickness can be conveniently measured by a gear tooth vernier as shown in the fig. Tabular method ta number of teeth on gear a tb number of teeth on gear b. Advantages of an epicyclic gear artec machine systems.
Induction motors, converter control, traction, simulation introduction currently, most suburban trains in russia contain 2 head carriage, 5 6 motor carriage and 3 4 auxiliary carriage. Apr 04, 20 reverted gear train when the axes of the first gear i. This is made possible in a 3 or more planet arrangement. Jul 11, 20 an alternative method for kinematic and power analysis of compound gear train is studied, which uses the torques and lever analogy of a given gear. In a nutshell this paper explicitly deals with spur gear meshing theoretical calculation after drafting it and validated it by using ansys software. New method with experimental validation for power transmission process analysis on herringbone gear train system wang feng and xu xing automotive engineering research institute, jiangsu university 2120, zhen jiang, china. It should be pointed out that six planets do not necessarily give a gearing twice the capacity of a similar. Define gear train and explain different types of gear train 25. Consequently, the dimensions of the sun gear would be onethird of the pinion of a parallel shaft gear train designed to transmit an equivalent torque. Nptel provides elearning through online web and video courses various streams.
With the popularization of computer, the design of planetary gear trains is headed in the automatic direction. One of the most important considerations for an epicyclic gear is to assure uniform load distribution among the planets. Mech 314 dynamics of mechanisms april 16, 2011 planetary gear train velocities 1 planetary gears and pitch point gear velocities figure 1. Therefore, the axes of both the gears are also fixed relative to each other. Aug 25, 2017 for the love of physics walter lewin may 16, 2011 duration. It will also address the use of epicyclic gear trains as a power coupling in a tandem bike. The method of claim 1 wherein said locally stored database is stored on a hard disk drive. Calculation of a planetary gear train this tutorial shows the usage of mesys shaft calculation with shaft systems. In an epicyclic gear train, the internal wheels a, b and the compound wheel c and d rotate independently about the axis o. Refers to the ratio of the input speed for the first gear in the train to the output speed for the last gear in the train. 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. Tabular method for epicyclic gear trains watch more videos at. Extension of a method of analysis of planetary gear trains. The sun gear2 on the input shaft is a 20 teeth external gear.
Singh2 1research scholar, department of mechanical engg. A basic example is a singlestage gear unit withthree fixedplanets and a rotating carrier know as a star epicyclic gear. Let, ta number of teeth on gear a, and tb number of teeth on gear b. In case there is a third gear there will be 3 trains and then 3 equations. Throughout, the book presents numerous realworld examples to illustrate the latest railway engineering big data applications of predictive analytics, such as the union pacific railroad s use of big data to reduce train derailments, increase the velocity of shipments, and reduce emissions. The gear will make 3 rotations on its axis in cw sense.
Since the gear tooth thickness varies from the tip to the base circle of the tooth, the instrument must be capable of measuring the tooth thickness at a specified position on the tooth. Application of planetary reduction gear in operation of the. When there is only one gear on each shaft, then it is. Alexander kapelevich akgears gear design consulting. The practical implication of this paper is significant as the gear train is a major driver in. Gear train rule pitch of two gears in mesh must be identical pinion. Consequently, the dimensions of the sun gear would be onethird of the pinion of a parallel shaft geartrain designed to transmit an equivalent torque. The present work on epicyclic gear trains carries out the design of all the gears, shafts, keys and the loads are calculated for individual gears in the epicyclic gear train system. Method and apparatus for storing, transmitting and retrieving. Based on the theoretical research of closed differential planetary gear transmission mechanism, a kind of software was developed to automatically calculate the tooth number with computer technology applied to the design of gear trains. The wheels e and f rotate on a pin fixed to the arm g. Table 1 comparison of parallel shaft vs epicyclic gear trains. Thediscussed examples illustrate how the presented approach can be extendedfor computing the equivalent inertia of an epicyclic gear train or forthe stability analysis of 2 d. Train speed is measured by two magnetic wheel contacts and the wind speed is detected by a standard wind sensor.
Their report presented a method to evaluate the dynamic load increment. Based on the number of degrees of freed om, the epicyclic gear trains can be further categorized as differential and planetary gear trains. Tabular method, epicyclic gear train, assignment help. A 1dof epicyclic gear train and a twostage planetary gear train are used to illustrate.
Thus a gear train is a set or system of gears arranged to transfer rotational torque from one part of a mechanical system to another. Specifically, this thesis will provide a simple solution technique for the general case of a twodegree of freedom 2dof planetary gear train along with new graphical design aids. Apr 02, 2018 gear train,simple gear train,compound gear train,reverted gear train, epicyclic gear train,types of gear train,what is a gear train,speed ratio, train value,what is gear train and its types, gear. Xtreme engineering equipment private limited offering epicyclic gear train apparatus, mechanical laboratory equipment. Velocity ratios of epicyclic gear trainthere are two methods of. Reverted gear train when the axes of the first gear i. Data are transmitted via a standard gsm data modem. For the love of physics walter lewin may 16, 2011 duration. Velocity ratios of epicyclic gear train the following two methods may be used for finding out the velocity ratio of an epicyclic gear train.
Design, load analysis and optimization of compound. Get best price and read about company and get contact details and address. Alternative method for analysis of complex compound planetary. Epicyclic gear train apparatus, mechanical laboratory. Dynamic analysis of epicyclic gear trains by means of. A twostage planetary gear stage is defined using the program. To define a train, consider that it has always the arm r, a gear of the planet and a main gear. Scribd is the worlds largest social reading and publishing site. The external balls will damage the internal bearings. Design, load analysis and optimization of compound epicyclic. Had it been easy gear train gear p will make 2 rotations for one rotation of gear s. This chapter will explore the theory of gear tooth action and.
Gear trains are widely used in all kinds of mechanisms and machines, from can openers to aircraft carriers. The method of claim 1 wherein said local station is a terminal. Do not reinstall the external balls when using the replacement motors. The gear train consists of five external gears and 4 internal annulus gears, including sun and planet gears forming an epicyclic gear train. Some older lgb models have motors with external ball bearings. All the components are modelled in catia to check the assembly and the. Sizing ranges from 2t through size 78, but the length can easily be adjusted to accommodate taller girls please see additional photos for sizing, supplies and materials needed to complete this project. The use of theproposed method is particularly amenable in conjuction with proceduresfor the computerized enumeration of geared kinematic chains. An epicyclic gear train is shown schematically in the adjacent figure. Fang zongde school of mechanical engineering, northwestern polytechnical university 710072, xian, china.
Epicyclic gear train problems and solutions pdf best of all, they are entirely free to find, use and download, so there is no cost or stress at all. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. 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. Internal ring gear, three planets on spiderarm and the sun gear as semipictorial fig. Epicyclic gear train solution techniques with application to. Printed in great britain extension of a method of analysis of planetary gear trains m. The method of claim 1 wherein said local station is a computer. Dec 14, 2014 for our gear train project, we originally had several different ideas. Tabular method consider an epicyclic gear train as shown in fig. Sep 18, 2017 hi all online lectures for engineering students. Thus suburban train consists from 10 or 12 carriages. Experimental analyses of vibration and noise of faulted. The ring gear 5 is fixed and the gear 2 is rotating at 60 rpn ccw ccwcounterclockwise and cw clockwise.