The pinion is free to rotate on a pin fixed to the lever arm. Applications of potentiometer o the potentiometer is used as a voltage divider in the electronic circuit. The first element comprises the external sun gear 1 and planet 2. Epicyclic gear train solution techniques with application. The spur gear is keyed to the engine shaft and rotates in anticlockwise direction. The following is a link to the source code for this program. 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. The thesis starts with a theoretical chapter containing the fundamentals of epicyclic gearing and the build of the specific gearbox investigated. Planetary or epicyclic gear train epicyclic gear train. A dynamometer is a device used for measuring the torque and brake power required to operate a driven machine. Epicyclictrain dynamometer an epicyclictrain dynamometer consists of a simple epicyclic train of gears, i. Each element consists of the three components illustrated below. This dynamometer is equipped with two data loggers that are able to log voltage, current, speed and time which complement with gra phic user interface software for calculating torque and power.
Have the subject use the wrist safety strap to minimize the chance of dropping the jamar. Mullers discovery of their perfect analogy to the simple epicyclic drive trains. An epicyclic train consists of two threecomponent elements of the kind examined above. Design of machinery an introduction to the synthesis and. The following chapter contains former testing and theory of power losses in a gearbox. The method of the innovative synthesis of the epicyclic gear trains was presented. The band has a compressed woven lining and bears against a cast iron drum of 350 mm diameter. A dynamometer is a device used for measuring power, torque or force of an engine, motor, or any rotating prime mover. If the arm is the input and the planet is the output, the overall gear ratio is 31 3. Epicyclic gear train solution techniques with application to.
The first dynamometer car was probably one built in about 1838 by the father of computing charles babbage. Design and construction of a frictional brake absorption. The pinion or the intermediate gear meshes with both the spur and annular gears. Passive or absorption dynamometer active or universal dynamometer a dynamometer that is designed to be driven is called an absorption or passive dynamometer.
The annular gear is also keyed to the driving shaft and rotates in clockwise direction. An epicyclic gear train consists of two gears mounted so that the center of one gear revolves. Epicyclic gear train solution techniques with application to tandem bicycling. Aurm441976a test engines using a dynamometer unit descriptor this unit covers the competence to test engines using a dynamometer. A dynamometer or dyno for short, is a device for simultaneously measuring the torque and. A dyno that can measure torque and power delivered by the power train of a vehicle. With the rotation of each element of the gear train in hand, the overall gear ratio becomes easy.
Design, load analysis and optimization of compound. Feb 28, 2017 the planetary gear set, also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering. When the dynamometer is in operation, two tangential forces acts at the end of pinion. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear. 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. A thorough understanding of the sometimes difficult material is facilitated through the use of both schematic and symbolic diagrams. Rotation of the housing is resisted by a strain gauge connected to the frame of. Epicyclictrain dynamometertorque and power transmitted.
All the components are modelled in catia to check the assembly and the. For a more involved epicyclic gear train example, please refer to the epicyclic gear train example section. It is made up of a number of elements which are interconnected to form the train. Epicyclic train dynamometer which measures power while it is being transmitted from driving to the driven shaft. Epicyclic train dynamometer which measures power while it is. The brake is to sustain a torque of 350 nm and the coefficient of friction between the band and the drum is 0. When you use the jamar hand dynamometer, please remember that it is a precision instrument and its accuracy can be impaired by abuse. There is another pulley b called driven pulley mounted on another shaft to which the power from pulley a is transmitted. Two inputs are needed to obtain a predictable output. Elec tric mo to r gt1 gt2 scre w driv er sh af t sw itc h mo t o r sha f t t em. Epicyclic train dynamometer it consists of a simple. The gear train consists of five external gears and 4 internal annulus gears, including sun and planet gears forming an epicyclic gear train.
As final results, efficiency and energy consumption of the power train system can be calculated and analyzed. Dynamometers can be broadly classified into two types. Advantages of an epicyclic gear artec machine systems. A common dynamometer in use in industry is the engine dynamometer where it is connected to the crankshaft of the engine. The term power transmission is defined as the move ment of. The annular gear is also keyed to the driving shaft and rotates in. The band has compressed woven lining and bears against a cast iron drum of 350 diameter. 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. All 34 types can be derived from one general form of the simple planetary gear train. The lever is pivoted about common axis of the driving and driven shaft.
An eddy current type dynamometer was used for control and measurement of engine power. Hello friends you are welcome to milan modha youtube channel, i am milan modha and in this video we have discussed about epicyclic train. Epicyclic train dynamometer it consists of a simple epicyclic. Epicyclic train dynamometer torque and power transmitted. The planetary gear set, also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering.
Following are the different types of gear trains, depending upon the arrangement of wheels. The recorded data included the pulling force of the engine, a plot of the. The book is profusely illustrated and analyzes many applications. Working for the great western railway of great britain, he equipped a passenger carriage to be placed between an engine and train and record data on a continuously moving roll of paper. Pdf the mechanical efficiency of epicyclic gear trains. The induction disk rotates inside a housing which contains electromagnetic coils. Epicyclictrain dynamometertorque and power transmitted my presentations profile feedback log out. Jul 18, 2017 a gear train is a combination of gears used to transmit motion from one shaft to another. Epicyclic gearing arrangements are comprised of four different elements thatproduce a wide range of speed ratios in a compact layout. Another class of gear train has wide application, the epicyclic or planetary train. A twostage planetary gear stage is defined using the program. It is stated that the simple planetary gear train consisting of two central gears, one or more planet gears and one arm, has 34 different types. Calculation of a planetary gear train this tutorial shows the usage of mesys shaft calculation with shaft systems. Sep 02, 2017 hydraulic dynamometer consists of an impeller or inner rotating member coupled to the output shaft of the engine.
Power absorption dynamometers measure and absorb the power output of the engine to which they are coupled. Epicyclic gear trains have been broadly applied in engineering practice. 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. Due to the centrifugal force developed in the outer casing, tends to revolve with the impeller, but is resisted by a torque arm supporting the balance weight. New approach article pdf available january 2005 with 5,504 reads how we measure reads. Epicyclic gear train we have already discussed that in an epicyclic gear train, the axes of the shafts, over which the gears are mounted, may move relative to a fixed axis. Epicyclictrain dynamometertorque and power transmitted auth with social network.
The dynamometer consists of a drive shaft rotating a 60 tooth speed wheel and an induction disk as seen schematically in figure 3. This is made possible in a 3 or more planet arrangement. It will be extremely useful to american engineers since it stresses the efficiencies of new and existing transmission designs and provides concise guide rules as well as worksheets. Epicyclic gearing systems also incorporate the use of an outer ring gear or annulus, which. Unit sector no sector assigned element performance criteria 1. It will also address the use of epicyclic gear trains as a power coupling in a tandem bike. For a solid shaft of diameter d, the polar moment of inertia for a hollow shaft of external diameter d and internal diameter d, the polar moment of inertia, from the above torsion equation the power transmitted.
Assuming uniform wear condition, find the axial load and the main dimensions of the clutch. Apr 19, 2015 hi i require to design an epicyclic gear train which has two different inputs and one output at another gear. Not only the epicyclic gear trains in common uses were obtained, but some new types of epicyclic gear. Epicyclictrain dynamometertorque and power transmitted 3835. Epicyclictrain dynamometer it consists of a simple epicyclic train of gears, i. After the theory is explained the next chapter contains. Information and translations of epicyclic train in the most comprehensive dictionary definitions resource on the web. The band having an angle of contact on the drum of 2700.
This plot was created using the matlab file ratioselect. The dynamometer absorbed 4 watts 6% out of 69 watts required to drive the rice dehusker. The upper block has a long lever attached to it and carries a weight w at its outer end. N is the gears teeth number, the sign depends on the type of gear and. Many types of dynamometers or torquemeters have been designed to measure power input, output in machine and other moving parts ranging from simple to. A gear train is a combination of gears used to transmit motion from one shaft to another. The mechanical efficiency of epicyclic gear trains. This tutorial shows you how to import a search engine query log into hypertable, storing the data into tables with different primary keys, and how to issue queries against the tables. Classification of dynamometers absorption type dynamometers. Design, load analysis and optimization of compound epicyclic.
Epicyclic train dynamometer it consists of a simple epicyclic train of. These drives receive an unusually clear treatment because at dr. Documents similar to tostudyofvarioustypeofdynamometers. The dynamometer then applies a resistance, or load, to the engine at different angular velocities. Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer, or planet, gears or pinions, revolving about a central sun gear or sun wheel. A basic example is a singlestage gear unit withthree fixedplanets and a rotating carrier know as a star epicyclic gear. Hi i require to design an epicyclic gear train which has two different inputs and one output at another gear. One of the most important considerations for an epicyclic gear is to assure uniform load distribution among the planets. They are great speed variation mechanisms, and are often. Obviously, since equation 20 must hold for the power. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. The planets 2 and 3 are compounded together on the common arm axles. Development of an epicyclic gear transmission laboratory.
The impeller in this dynamometer rotates in a casing filled with a fluid. The load can be applied by using a variety of brakes including an electric brake, water brake, or friction brake. When local production of power measuring device was required, an epicyclic gear transmission laboratory dynamometer was designed, developed and tested with prony brake on a small capacity rice dehusking machine with source of power from an electric motor. An epicyclic train is often suitable when a large torquespeed ratio is required in a compact envelope. This includes dynamometer setup, testing, data logging and analysis, devising strategies for improvement and dynamometer shutdown procedures. The input torques on a is 12 nm and the efficiency is 75%. R is the angular speed of the arm, equal to the input angular speed. What links here related changes upload file special pages permanent link page information wikidata item.