What are the advantages of flexible coupling over 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 is rigid coupling?

A rigid coupling is one that does not allow axial or radial motion between the driving and driven shafts. As shown in Fig. 3.130, a rigid coupling consists of two flanges, one mounted on each shaft. Rigid couplings require exact alignment between shafts otherwise considerable wear on the bearings and seals will occur.

What are flexible couplings used for?

The purpose of a flexible coupling is to transmit torque from one piece of rotating equipment to another, while accepting at the same time a small amount of misalignment. Flexible coupling misalignment is expressed, as an order of magnitude, in thousandths of an inch.

What is flexible type coupling?

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.

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 is the advantage of flexible coupling?

A flexible coupling exists to transmit power (torque) from one shaft to another; to compensate for minor amounts of misalignment; and, in certain cases, to provide protective functions such as vibration dampening or acting as a “fuse” in the case of torque overloads.

Why are rigid coupling is used?

Rigid couplings are used mainly on low speed or low torque applications where the shafts are an identical size and are not subject to misalignment. Applications which use rigid shaft couplings include: Conveyors. Food processing applications.

Which of the following couplings is a flexible coupling?

Odlham coupling is the flexible coupling used to connect two shaft have lateral misalignment.

What are the three types of compression flexible couplings?

Types Of Flexible Couplings Elastomeric couplings are grouped according to the way their elastic element transmits power. These fall into three different types, namely compression, shear, or a combination of both.

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.

What is the difference between material flexing and mechanical flexing couplings?

Material flexing couplings do not require lubrication, with the exception of grid couplings. The mechanical flexing couplings accept misalignment from rocking, rolling or sliding of metal surfaces. All metal mechanical flexing couplings require lubrication.

What is rigid flange coupling?

Rigid flange couplings are commonly used in large, straight shafts where tight alignment tolerances must be maintained. In the power transmission industry, these couplings are very common and consist of two separate flanged halves that are bolted together.