
Couplings serve as essential mechanical components widely applied in various power transmission systems, undertaking core functions that ensure the stable and efficient operation of mechanical equipment. Primarily, they connect two rotating shafts to transmit torque and rotational motion, enabling the seamless transfer of power between driving and driven parts in mechanical devices. Beyond basic power transmission, couplings effectively compensate for various deviations occurring during equipment operation, including axial, radial and angular misalignment between shafts caused by installation errors, mechanical wear or operational vibration. They also play a vital role in buffering vibration and reducing impact force generated during startup, shutdown and load switching processes, which protects precision mechanical parts from damage and lowers equipment failure rates. Additionally, quality couplings can enhance the overall operational stability of machinery, extend the service life of transmission systems, and ensure the safety and continuity of long-term mechanical operation in diverse industrial working conditions.