Permanent magnet coupling is a mechanical device that uses permanent magnet materials to generate magnetic force and transmit torque. It is widely used in various transmission systems and has received widespread attention for its high efficiency, energy saving, and environmental protection characteristics. The permanent magnet coupling mainly consists of two permanent magnet rotors and a non-magnetic isolation sleeve, which achieves magnetic force transmission through the non-magnetic isolation sleeve. When one of the rotors is driven by power, the permanent magnet on it will generate a magnetic field, and the magnetic field lines will be transmitted to the permanent magnet on the other rotor through a non-magnetic isolation sleeve, thereby achieving torque transmission. This transmission method does not require mechanical contact, therefore it has extremely low energy loss, can save a lot of energy, and reduce operating costs. At the same time, due to the fact that permanent magnet couplings do not require lubricating oil or other media, they will not produce pollution such as oil and noise during operation, which is beneficial for protecting the environment and reducing the environmental pressure on enterprises. In addition, permanent magnet couplings have a simple structure, are relatively easy to maintain, and have relatively low maintenance costs. It also has high temperature resistance and corrosion resistance, suitable for various harsh environments. Whether in the fields of fan transmission systems, ship transmission systems, petrochemical equipment, or mining machinery, permanent magnet couplings can provide stable and reliable torque transmission, becoming an ideal choice for various transmission systems
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