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A flexible coupling is used to connect two shafts, end-to-end in the same line, for two main purposes. The first purpose is to transmit power that is torque from one shaft to another, thereby causing both to rotate in unison, at the same RPM. The second purpose is to compensate for small amounts of misalignment and random movement between the two shafts.
Flexible couplings are made of elastic materials, like rubber, or have various other configurations. During rotation, flexible couplings can accommodate misalignment and motion.
How flexible coupling operates?
It is a known fact that in any direct mechanical drive system, there is the need to couple the variety of driven elements that are included. The majority of drive elements which include gear reducers, lead screws, and a host of other components, are driven by shafting. The shafting is supported by multiple bearings. This allows the shafting to be held extremely straight and rigid while rotating which at the same time avoid any kind of possible balancing and support problems. Because of this rigid support, it practically becomes impossible to avoid slight misalignments between a driving and driven shaft when they are connected.
The simple and most common solution to the problem of shaft misalignment is using a flexible coupling to absorb lateral, angular, and axial restoring forces, while maintaining some rigidity or fixed position in rotation. The degree to which this torsional rigidity is applied varies from one application to another. The basic function of flexible coupling is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both.
Various materials are used to make flexible couplings like as follows:
There are three basic types of flexible couplings. They are as follows:
Functions of flexible coupling:
There are three basic functions of a flexible coupling. They are as follows:
The flexible couplings are available from a large number of different manufacturers, each of which designed them with specific applications in mind. Ideal linkage can be achieved for any motion system with proper selection of the right flexible coupling for any application.