Flexible couplings

Flexible couplings are one of the main types of couplings. They are used to connect two shafts end-to-end on the same line to transmit power, which is torque, from one shaft to the other, causing both to rotate together at the same speed. The other purpose is to accommodate small misalignments and random movements between the two axes. Several factors should always be considered when selecting flexible couplings. 

These are Torsional Stiffness, Backlash, Torque, Durability and Fastening System. All of this has to do with the clutch selection. Specific details vary for different types and their functions. In this article, we will go into all aspects of the different types of loose coupling. Follow this new blog on Linquip to learn more about these types of couplings. 

Different Types of Flexible Couplings 

Mechanical Flexible Couplings 

The mechanical flexible coupling generally derives its flexibility from loose parts by rolling, sliding or both with some flexing of the material. Flexible mechanical couplings provide a flexible or flexible connection that accommodates misalignment between shafts. This flexible feature reduces forces or stresses caused by reacting to misalignment. The mechanical nature of these flexible coupling types allows for almost unlimited power and torque capabilities. 

Elastomeric Flexible Couplings 

These types of flexible couplings use a resilient material to transmit torque between two metal hubs. Elastomeric couplings get their flexibility from the stretching or compression of an elastic material such as rubber and plastic. Some slipping or rocking may occur but is usually minimal. 

The design of elastomeric couplings means that the elastic material must wear out before any metal components. This not only saves time and money on maintenance but also means that the couplings do not need to be lubricated. Some advantages of this coupling are high vibration damping, shock absorbing capability and tolerance to a high degree of misalignment. They are also inexpensive and lighter than mechanical clutches. The elastomeric element is sufficiently resistant to fatigue failure to provide acceptable life to the cost of the coupling. 

Metal Diaphragm Couplings 

Metal Diaphragm Couplings rely on the flexing of metal elements to accommodate misalignment and axial movement in the shafts. These flexible couplings gain flexibility by flexing a diaphragm within the coupling. They have been around longer than the other three main types of clutches. These couplings require little maintenance and do not need to be lubricated; However, they can be more expensive than mechanical flexible couplings. Metal diaphragm couplings are somewhat expensive flexible couplings that generally do not allow for compensated misalignment. These types of flexible couplings get their flexibility from bending thin metal discs or diaphragms. Classified as metallic diaphragm couplings, disc and diaphragm couplings transmit torque and accommodate the expected slight misalignment between most equipment shafts. 

Miscellaneous Couplings 

These types of flexible couplings derive their flexibility from a combination of the mechanisms described above or from a single mechanism such as spring and Schmidt couplings.