Introduction to Flexible Elements
Flexible Drives
The flexible power transmission element comprises of belt drives, chain drives and rope drives. Since these elements are flexible they are called flexible drives. They are commonly used in short distance power transmission. Wire ropes can also be used for long distance power transmission. Unlike rigid transmission elements (gears), the design of flexible drives is simple and reduces the cost. When compared with rigid transmission elements, they are quiet and absorb shocks which reduce mechanical vibrations.
Flexible drives do not have infinite life; hence it’s necessary to consider the wear, aging, loss of elastic property and also the environment in which the drive is employed, while designing/selecting the flexible drives.
Advantages of Flexible Power Drives
· The use of flexible elements simplifies the design and reduces cost.
· They can be used to transmit power over relatively long distances.
· They generally have high efficiency that ranges from 90% to 98%.
· They can drive several shafts from a single power source.
· They tolerate some degree of misalignment between the driven and the driver machines.
· They play a role in absorbing shock loads and reducing vibrations (since they are elastic and usually long).
Disadvantages of Flexible Power Drives
· More space required
· The velocity ratio is comparatively small
· If overloaded, power transmission varies
Classification of Flexible Power Drives
· Belt Drives
· Wire Ropes
· Chain Drives
Introduction to V belt drive and its design: Click here
Introduction to Wire rope drive and its design: Click here
Introduction to Chain drive and its design: Click here
