When the medium is water or water-based liquid, the temperature rise in the annulus area can be maintained at 3-5°C; when the medium is hydrocarbon or oil, the temperature rise in the annulus area can be maintained at 5-8°C. Since the sliding bearing of the magnetic pump is lubricated by the conveyed medium, different materials should be used to make the bearings according to different media and operating conditions. 2. Sliding bearing The materials of sliding bearing of magnetic pump include impregnated graphite, filled PTFE, engineering ceramics, etc.

Demagnetization will not occur when the same poles are close, so it is a good source of magnetic field. Controlling the flow of cooling lubricating fluid When the pump is running, a small amount of liquid must be used to wash Submersible Sewage Pumps Manufacturers and cool the annular gap area between the inner magnetic rotor and the isolating sleeve and the friction pair of the sliding bearing. 4. The isolation sleeve is made of non-metallic materials with high resistivity and high strength, which is very effective in reducing eddy current.

Protection measures When the driven part of the magnetic drive is running under overload or the rotor is stuck, the main and driven parts of the magnetic drive will automatically slip off to protect the pump. The annular gap area between the inner magnetic rotor and the isolating sleeve generates high heat due to eddy currents. When the isolating sleeve adopts a metal isolating sleeve, the isolating sleeve is in a sinusoidal alteating magnetic field,

and eddy currents are induced in the cross section perpendicular to the direction of the magnetic force and converted into heat. 2. Permanent magnets made of rare earth permanent magnet materials have a wide operating temperature range (-45℃~400℃), high coercivity, and good anisotropy in the direction of the magnetic field. The key component of the magnetic drive consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve