Magnetic pump manufacturers tell you the principle and structure of the magnetic pump transmission
Magnetically driven pumps, also known as magnetic pumps, are distinguished by the fact that the pump has no shaft seal components, ie there are no dynamic seal leaks. The magnetic drive pump consists of a special structural component of the pump, a magnetic drive, a magnetically driven pump and a motor. The key components of the magnetic actuator consist of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic barrier sleeve.
According to the principle that the magnetic field can penetrate the air gap and the non-magnetic medium, when the motor drives the outer magnetic rotor to rotate, the inner magnetic rotor connected with the impeller rotates synchronously by the action of the magnetic lines of force to complete the non-contact transmission of the torque. From the shaft of the conventional pump to the structure of the barrier sleeve of the two shafts, the shaft seal portion is added to the shaft seal portion of the pump.
The dynamic seal is converted into a static seal, and the pump shaft and the inner magnetic rotor are completely closed by the pump body and the barrier sleeve, completely solving the problem of leakage of the medium, and completely solving the problems of "running, blowing, dripping and leaking". This problem eliminates the hidden dangers of flammable, explosive, toxic and harmful media leaking through the pump seal in the refining and chemical industry, effectively protecting the physical and mental health and safe production of employees.
The density of the magnetic pump conveying medium is not more than 1300 kg/m3, and the viscosity is not more than 30×10-6 m3/s. There are no ferromagnetic and fibrous liquids. The additional temperature of the conventional magnetic pump is about F46 cloth of metal material or pump body, the maximum working temperature is 80 °C, the additional pressure is 1.6 MPa, the working temperature of the high temperature magnetic pump is less than 350 °C, and the working temperature of the high temperature magnetic pump is less than 350 °C. For a pump body which is a non-metallic material, the maximum temperature does not exceed 60 ° C and the additional pressure is 0.6 MPa.
When the pump is in operation, a small amount of liquid must be cleaned and cooled with a conflicting pair of annular gap regions and sliding bearings between the inner magnetic rotor and the barrier sleeve. The flow rate of the coolant is generally 2% ≤ 3% of the planned flow rate of the pump. The annular gap between the inner magnetic rotor and the barrier sleeve creates a higher heat due to eddy currents.
When the cooling smooth liquid is poor or the flushing holes are not smooth and clogged, the medium temperature will be higher than the operating temperature of the permanent magnet, so the internal magnetic rotor will gradually lose its magnetic properties, and the magnetic actuator will fail. When the medium is water or water-based liquid, the temperature rise in the annulus region can be maintained at 3 ≤ 5 ° C. When the medium is hydrocarbon or oil, the temperature rise in the annulus region can be maintained at 5 ≤ 8 ° C.