How about the magnetic pump working

The working principle of the magnetic pump: When the motor drives the outer magnetic rotor to rotate, the magnetic field penetrates the isolation sleeve and drives the inner magnetic rotor connected to the impeller to rotate synchronously, realizing the contactless and synchronous transmission of shaft power. The dynamic seal structure that is easy to leak is transformed into a static seal structure with zero leakage.
Magnetic drive can be divided into synchronous or asynchronous design. Most magnetic pumps use synchronous design. The motor is connected with the outer magnet through an external coupling, and the impeller is connected with the inner magnet. There is a fully sealed isolation sleeve between the outer magnet and the inner magnet, which completely separates the inner and outer magnets, so that the inner magnet is in the medium. The rotor of the motor directly drives the impeller to synchronize through the attraction of the magnetic poles between the magnets. Rotate. Asynchronous design magnetic transmission, also called torque ring magnetic transmission. A squirrel-cage structure torque ring is used to replace the inner magnet, and the torque ring rotates at a slightly lower speed under the attraction of the outer magnet. Since there is no internal magnetic steel, its use temperature is higher than that of synchronous drive magnetic drive.

Magnetic pump housing
Magnetic drive pump is mainly composed of pump casing, impeller, magnetic coupling, isolation sleeve, outer magnetic cylinder, bracket, motor, base and other parts.
Pump housing: also known as the pump cavity, it is the main body of the water pump, plays a supporting and fixing role, and is an important part of storing liquid to complete transportation.
Magnetic pump impeller
Impeller: It is the main component of liquid transportation. The impeller of the magnetic pump is divided into two forms. One is the conjoined impeller, and the impeller and the internal magnetic rotor are integrated. The other is a single impeller, which is fixed on the pump shaft by a nut. The blades on the impeller play the main role, and the impeller must pass a static balance experiment before assembly. The inner and outer surfaces of the impeller are required to be smooth to reduce the friction loss of the water flow. When the motor drives the outer magnetic cylinder to rotate, the magnetic field penetrates the isolating sleeve and drives the inner magnetic rotor connected to the impeller to rotate synchronously to complete the conveying.
Magnetic coupler: n pairs of magnets (n is an even number) are assembled on the inner and outer magnetic rotors of the magnetic actuator in a regular arrangement, so that the magnet parts form a complete coupling magnetic system. The structure of the magnetic coupling, the design of the magnetic circuit, and the materials of its parts are related to the reliability of the magnetic pump, the efficiency of the magnetic transmission and the service life. The magnetic coupling should not appear decoupling and demagnetization under the specified conditions.

Isolation sleeve: It is also called static seal. Isolation sleeve is an important factor for no leakage of magnetic pump. The isolating sleeve is in a sinusoidal alternating magnetic field, and eddy current is induced in the cross section perpendicular to the direction of the magnetic force and converted into heat. The isolation sleeve is made of non-metallic materials with high resistivity and high strength, which is very effective in reducing eddy current.
Outer magnetic cylinder: The outer magnetic steel should also be firmly fixed on the outer magnetic steel ring with adhesive. In order to prevent damage to the outer magnet during assembly, the inner surface of the outer magnet should also be covered. The motor runs at high speed through the outer magnetic cylinder, and drives the inner magnetic rotor to drive the impeller to complete the conveying through the isolation sleeve.