First of all, when the hydraulic coupler is used as a motor drive, it has the following disadvantages: (1) The structure is complex, the daily maintenance workload is heavy, and it is difficult to install and disassemble; (2) high cost and low cost performance; (3) Fuel injection and ignition are unsafe. When the hydraulic coupling with oil as working fluid is not maintained and used according to regulations, it is easy to cause oil injection and fire accidents, which will pollute the site environment; (4) The service life is short and needs to be replaced in 2-3 years; (5) No damping effect; (6) High failure rate and poor reliability.
Compared with hydraulic coupling, permanent magnet coupling has the following ten advantages: (1) remarkable energy-saving effect, adjustable air gap to change the speed, and the energy-saving rate reaches10%-50%; (2) Soft start with buffer, which reduces the motor impulse current and prolongs the service life of the equipment; (3) Large installation alignment error is allowed, which greatly simplifies the installation and debugging process; (4) overload protection function, which improves the reliability of the whole motor drive system; (5) Maintenance-free, no bearing, no need to add lubricating oil or grease, no wearing parts and no material deterioration; (6) Long service life and design life of 30 years; (7) The damping effect is good, and the torque will not be transmitted due to mechanical buckling; (8) simple structure and adaptability to various harsh environments (9) no harmonic generation; (10) is small in size and convenient to install, and can be used to transform existing systems or build new ones.
According to Yaozhong Group, which obtained this patented technology, McPherson permanent magnet coupler is very reliable in energy saving and safety performance. Compared with hydraulic coupler, permanent magnet coupler has many advantages, which can be applied to various harsh environments, and can significantly improve the safety and stability of system operation, save energy and reduce maintenance costs.