Magnetic pump working principle diagram

Magnetic pump is short for magnetic drive pump. In simple terms, the principle of magnetic pump is to use the working principle of permanent magnet coupling. Magnetic pumps are mainly used in computer over-cooling systems, drinking fountains, water heaters pressurization, automotive cooling circulation system, humidifiers, and other sanitary products.

Before understanding the working principle of the magnetic pump, let's look at the composition of the magnetic pump. The magnetic pump consists of a pump, a magnetic actuator, and an electric motor. The key components of the magnetic actuator consist of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetically conductive isolation cover. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and the non-magnetic material, drive the inner magnetic rotor connected with the impeller to rotate synchronously, realize the dynamic non-contact transmission, and transform the dynamic seal into a static seal. Because the pump shaft and the magnetic rotor are completely closed by the pump body and the isolation sleeve, the problems of “running, running, dripping, and leaking” are completely solved, and the leakage of flammable, explosive, toxic, and harmful media through the pump seal in the refining and chemical industry is eliminated. The security risks have effectively ensured the physical and mental health and safety of employees.

The n pairs of magnets (n is an even number) are arranged in a regular arrangement on the inner and outer magnetic rotors of the magnetic actuator, so that the magnet parts form a complete magnetic system with each other. When the inner and outer magnetic poles are opposite each other, ie, the displacement angle Φ=0 between two magnetic poles, the magnetic energy of the magnetic system is the lowest; when the magnetic pole rotates to the same polarity, ie, the displacement angle between the two magnetic poles Φ=2π /n, the magnetic energy of the magnetic system is maximum at this time. After removing the external force, because the magnetic poles of the magnetic system repel each other, the magnetic force will restore the magnet to the state with the lowest magnetic energy. The magnet then moves to drive the magnetic rotor to rotate.

Above we understand the principle of the magnetic pump. There are many types of magnetic pumps, so we must pay attention to the requirements of parameters such as flow rate, head, pressure, temperature, etc. during the purchase. During the use of the magnetic pump, it is necessary to pay attention to regular maintenance and keep it clean.