What are the advantages of flexible coupling over the rigid coupling?
A flexible coupling can accommodate a slight misalignment between shafts (up to 0.5-degree angular misalignment and 5 mm axial misalignment) but a rigid coupling cannot tolerate any such misalignment.
What are the advantages of flexible coupling?
Flexiblecouplings have an advantage over rigidcouplings because of the unavoidable misalignment between shafts in some machinery. A degree of movement between the shafts is possible due to thermal expansion.
Why are rigid coupling used?
Rigid couplings are designed to connect two shafts together so that no relative motion occurs between them (see Fig. 4.16). Rigid couplings are suitable when precise alignment of two shafts is required. If significant radial or axial misalignment occurs, high stresses may result, which can lead to early failure.
Where do we use flexible coupling?
Flexible coupling are mostly used to protect the pipelines connected to any machines carrying fluids . It may be used for a pump or some engines carrying coolants through it. Another use of flexible coupling is to transmit power from an engine .
What is the disadvantage of rigid coupling?
Disadvantages of rigid flange coupling : It can’t tolerate misalignment between the axes of two shafts. It is used only where the motion is free from shock and vibrations. It requires more radial space.
What type of coupling would allow the greatest flexibility?
Metallic membrane couplings produce relatively low moments and forces which are relatively independent of torque. The most commonly used flexible couplings today are those that produce the greatest flexibility (misalignment and axial capacity) while producing the lowest external loads on equipment.
Why couplings are used give the names of different types of rigid & flexible couplings explain rigid coupling with help of neat sketch?
However there are two main types of couplings (Fig 1) which are (i) rigid couplings, and (ii) flexible couplings. Rigid couplings are used for shafts having no misalignment. Since these couplings cannot absorb any misalignment the shafts to be connected by a rigid coupling must have good lateral and angular alignment.
What are the disadvantages associated with the use of rigid couplings?
Which coupling is not a flexible coupling?
Detailed Solution
| Rigid Coupling | Flexible Coupling |
|---|---|
| Most widely used rigid coupling is – Box / Muff / Sleeve coupling Split Muff / Clamp coupling Cast iron flange coupling | Most widely used flexible coupling is – Oldham coupling (Parallel misalignment) Universal joint (Angular misalignment) Bushed pin type coupling. |
What are flexible couplings?
Flexible couplings are used to transmit torque from one shaft to another when the two shafts are slightly misaligned. Flexible couplings can accommodate varying degrees of misalignment up to 3° and some parallel misalignment. A coupling designed to allow a limited angular movement between the axes of two waveguides.
Which is an example of flexible coupling?
Example of some flexible coupling types: Gear Coupling. Disc Coupling or diaphragm Coupling (LAMAFLEX COUPLING) Chain Coupling. Grid Coupling.
What type of coupling requires no maintenance and has no wearing of parts?
Compression Coupling: This is used for light or medium loads. These couplings are quickly and easily connected to shafts and require no maintenance. They have no wearing parts. Ribbed Coupling: This type is used for heavy duty service to connect shafts of the same diameter.