A coupling is a mechanical device that is mainly used to connect two shafts or shafts and rotating parts to ensure that these parts can rotate together without disengagement during the transmission of motion and power. A coupling is usually composed of two halves, which are connected to the two ends of the shaft by keys or tight fits, and then connected in some way. It can not be disengaged under normal circumstances, but it plays a protective role in overload to prevent the connected parts from being overloaded.
Basic functions of couplings Transmit torque and motion: The main function of the coupling is to transfer torque from one shaft to another shaft so that the two shafts rotate synchronously. Compensate for offset: The coupling can compensate for axial, radial and angular offsets caused by inaccurate manufacturing and installation, working deformation or thermal expansion. Overload protection: In some cases, the coupling can slip or disconnect when overloaded, thereby protecting the connected equipment.
Classification of couplings Couplings are mainly divided into two categories: Rigid couplings and Flexible couplings.
Rigid coupling: Suitable for occasions where the concentricity of the two shafts is extremely high. It has a simple structure, small size and low cost. Common ones include flange couplings, sleeve couplings and clamp couplings.
Flexible coupling: Allows a certain axial deviation between the two shafts and is more widely used. Common ones include diaphragm type, bellows type, plum blossom type elastic couplings, etc.
Application field
Couplings are widely used in metallurgy, chemical industry, machinery, vehicles, ships, electronics, aircraft and other industrial sectors. For example, in the metallurgical industry, couplings are often used to connect driving equipment and driven equipment, transmit power and compensate for offset.
