Table of Contents
- 1 What is meant by epicyclic gear train?
- 2 How does an epicyclic gearbox work?
- 3 What are the differences between compound gear train and epicyclic gear train?
- 4 What will be the degree of freedom of epicyclic gear train?
- 5 What is riveted gear train?
- 6 What are the types of gear train?
- 7 What is a simple gear train?
- 8 What is epicyclic gearbox?
What is meant by epicyclic gear train?
An epicyclic gear train is a coaxial speed reducer or increaser stage comprised of a sun gear, planet gear(s), and a ring gear (Townsend 1992; Coy et al. An epicyclic gear train is an excellent load-sharing device. The input torque is split between the planet gears, thus increasing the load capacity of the gear train.
How does an epicyclic gearbox work?
An Epicyclic gearbox is an automatic type gearbox in which parallel shafts and gears arrangement from manual gear box are replaced with more compact and more reliable sun and planetary type of gears arrangement and also the manual clutch from manual power train is replaced with hydro coupled clutch or torque convertor …
What is the advantage of epicyclic gear train?
Advantages of Epicyclic Gearbox : Compact and lightweight with high torque transmission. High radial loads on the output shaft. It is quieter in operation. Uniform distribution of load over all gears having greater tooth contact.
What is a planetary gear train used for?
Planetary gear train (PGT) has been widely used in the transmissions of helicopters, automobiles, wind turbine, aircraft engines, etc. The main advantages of this transmission are its high efficiency, its compactness, its large transmission ratio and its large power-to-weight ratio, etc.
What are the differences between compound gear train and epicyclic gear train?
In compound gear there is extra than one gear on shaft which is firmly fix and mash through the gear on another shaft forming gear train. In elliptical gear train axis of shaft on which the gear are mount can move relative to the fixed axis. In a compound gear train, every gear has its own shaft for rotation.
What will be the degree of freedom of epicyclic gear train?
Generally all simple gear train have 1 Degree of freedom but Epicyclic have 2 DOF since you need to give two inputs for getting an output.
What are the advantages of epicyclic gear train as compared to simple gear train?
Coaxial arrangement of input shaft and output shaft. Load distribution to several planetary gears. High efficiency due to low rolling power. Almost unlimited transmission ratio options due to combination of several planet stages.
Where the epicyclic gear trains are used Mcq?
The epicyclic gear trains are useful for transmitting high-velocity ratios with gears of moderate size in a comparatively lesser space. The epicyclic gear trains are used in the back gear of lathe, differential gears of the automobiles, hoists, pulley blocks, wrist-watches, etc.
What is riveted gear train?
When the axes of the first gear (i.e. first driver) and the last gear (i.e. last driven or follower) are co-axial, then the gear train is known as reverted gear train as shown in Fig.
What are the types of gear train?
We have generally 4-types of gear trains, and those are:
- Simple Gear Train.
- Compound Gear Trains.
- Reverted gear Trains.
- Epicyclic Gear Trains.
What does epicyclic gear mean?
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. Typically, the planet gears are mounted on a movable arm or carrier, which itself may rotate relative to the sun gear.
What does epicyclic train mean?
epicyclic train, epicyclic gear train (noun) a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis
What is a simple gear train?
Simple gear train is the a system in which gears of different module are meshed in such a way that maximum amount if torque can be transmitted without slip. The following are some of its applications: It is used in the gear box of automobiles. It’s used in lathe machines and heavy duty press machines.
What is epicyclic gearbox?
Epicyclic gearing. An epicyclic gear train (also known as planetary gear) consists of two gears mounted so that the centre of one gear revolves around the centre of the other. A carrier connects the centres of the two gears and rotates to carry one gear, called the planet gear, around the other, called the sun gear.