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A magnetic bearing consists of two concentric ring shaped permanent magnets (rotor and stator).
The rotor is made to suspend over the stator without direct contact each other by using special
magnetism. The advantage of the bearing is apparently no mechanical friction between rotor and stator.
Magnetic bearings support moving machinery without physical contact, for example, they can levitate a rotating shaft and permit relative motion without friction or wear. Long considered a promising advancement, they are now moving beyond promise into actual service in such industrial applications as electric power generation, petroleum refining, machine tool operation and natural gas pipelines. The rotating part of inductive (mechanical) energy meter needs a bearing. Traditionally, this bearing is made of jewel. Initially, the mechanical friction of new jewel bearing is very small. As a result, the start electrical current is also very small. But the fatal shortage of jewel bearing is that it cannot resist abrasion. After 2-3 years of working, the friction retardation of the bearing makes the energy meter lose the measuring accuracy of electricity. In order to overcome the weakness of the jewel bearing, scientists thought of using magnetic bearing to replace it. The practice has proved magnetic bearings can extend the life of energy meter to 20-30 years without influencing its measurement accuracy. |
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Magnetic coupling consists of two magnets, a drive magnet that is attached to the motor shaft and
a driven magnet that is completely sealed within the pump head and is connected to the driving gear.
The driven magnet is a wetted component and is totally encapsulated. The two magnets couple
automatically such that the drive magnet turns the driven magnet and gears without physical contact.
Decoupling occurs when the pump load exceeds the coupling torque between the two magnets. This feature can act as a safety device to prevent damage to the pump and motor as well as associated piping. The magnets can be recoupled by bringing the motor to a complete stop, then eliminating the cause of the decoupling and restarting. For Products information please contact us per email. |
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