The magnetic pump is a centrifugal pump with no leakage and no sealing device. Its working principle is based on the principle of magnetic coupling.
The magnetic pump is mainly composed of two parts: the driving part and the transmission part.
Drive part: The drive part usually consists of a motor and an external magnet. The electric motor rotates the external magnet through a shaft transmission.
Transmission part: The transmission part usually consists of an internal magnet and an impeller. The inner magnet and the outer magnet attract each other, forming a magnetic coupling. Internal magnets are attached to the impeller and transmit the driving force via magnetic coupling.
The working principle is as follows:
Startup: When the motor starts, the external magnet starts to rotate, generating a rotating magnetic field.
Magnetic coupling: The rotating magnetic field of the external magnet interacts with the internal magnet, causing the internal magnet to also start to rotate. Due to the magnetic attraction, a magnetic coupling is formed between the inner magnet and the outer magnet. Through this magnetic coupling, the driving force is transmitted to the internal magnet.
Impeller operation: The internal magnet is connected to the impeller. When the driving force is transmitted to the internal magnet, this force will act on the impeller through magnetic coupling. The impeller then begins to rotate, sucking the liquid in from the inlet and pushing it out to the outlet through centrifugal force.
During the entire process, the magnetic pump does not require mechanical seals, thus avoiding the possibility of leakage. Magnetic pumps can handle corrosive, flammable, explosive and other special liquids, so they are widely used in chemical, pharmaceutical, electronic and other fields.