An epicyclic gear train also known as planetary gear consists of two gears mounted so that the center of one gear revolves around the center of the other. A carrier connects the centers of the two gears and rotates to carry one gear, called the planet gear or planet pinion , around the other, called the sun gear or sun wheel. The planet and sun gears mesh so that their pitch circles roll without slip. A point on the pitch circle of the planet gear traces an epicycloid curve. In this simplified case, the sun gear is fixed and the planetary gear s roll around the sun gear. An epicyclic gear train can be assembled so the planet gear rolls on the inside of the pitch circle of a fixed, outer gear ring, or ring gear, sometimes called an annular gear.
|Published (Last):||7 May 2013|
|PDF File Size:||19.59 Mb|
|ePub File Size:||6.8 Mb|
|Price:||Free* [*Free Regsitration Required]|
SlideShare Explore Search You. Submit Search. Successfully reported this slideshow. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads.
You can change your ad preferences anytime. Types of Dynamometers. Upcoming SlideShare. Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Published in: Engineering. Full Name Comment goes here. Are you sure you want to Yes No. No Downloads. Views Total views. Actions Shares. Embeds 0 No embeds.
No notes for slide. Types of Dynamometers 1. By knowing frictional resistance we can determine torque transmitted and hence the power of engine. Types of dynamometers 1 Absorption dynamometer Prony brake dynamometer Rope brake dynamometer 2 Transmission dynamometer Belt transmission dynamometer Epicyclic dynamometer Torsion dynamometer 5. Prony brake dynamometer 2. Rope brake dynamometer 3. Hydraulic dynamometer 6. In this method of measuring horsepower is to attempt to stop the engine by means of a brake on the flywheel and measure the weight which an arm attached to the brake will support, as it tries to rotate with the flywheel.
In Prony Brake Dynamometer , when the Brake is to be put in operation , the long end of the lever is loaded with suitable weights W and the nuts are tightened until the engine shaft runs at a constant speed and the lever is in Horizontal Position.
Under these conditions , the moment due to the weight W must balance the moment of the Frictional Resistance between the Blocks and Pulleys. One side of rope is connected to a spring balance and the other to a loading device. The drum therefore require cooling.
In order to prevent the slipping of the ropes over the flywheel, wooden blocks are placed at intervals around the circumference of the flywheel.
During operation of the brake, the prime mover is made to run at constant speed. The power developed by the prime mover is transmitted through the dynamometers to some other machine where the power is suitably measured. Belt Transmission Dynamometer 2. Epicyclic Train Dynamometer 3. Torsion Dynamometer There is another driven pulley mounted on another shaft, to which the power from pulley is transmitted.
The lever carries a dead weight at the one end, and a balancing weight is attached at the other end. A large number of torsion dynamometers are used to measure the angle of twist. Bevis-Gibson flash light torsion dynamometer GTU Question Q.
You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. Now customize the name of a clipboard to store your clips. Visibility Others can see my Clipboard. Cancel Save.
Give the classification of dynamometer. State the function of it.
A dynamometer or "dyno" for short, is a device for simultaneously measuring the torque and rotational speed RPM of an engine , motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by the dynamometer itself as kW or bhp. In addition to being used to determine the torque or power characteristics of a machine under test, dynamometers are employed in a number of other roles. In standard emissions testing cycles such as those defined by the United States Environmental Protection Agency , dynamometers are used to provide simulated road loading of either the engine using an engine dynamometer or full powertrain using a chassis dynamometer. Beyond simple power and torque measurements, dynamometers can be used as part of a testbed for a variety of engine development activities, such as the calibration of engine management controllers, detailed investigations into combustion behavior, and tribology.