Pump industry suppliers to tell you: material selection of inner and outer magnetic steel magnetic pump characteristic is what

magnetic pump material selection of inner and outer magnetic steel

magnetic drive water pump magnetic pump, and shielding pump, only static seal no dynamic seal structure, class the main structure is centrifugal pump, magnetic water pump but driving principle of the magnetic drive is used. So during conveying fluid leak-off, used in the petrochemical system conveying inflammable, explosive, volatile, toxic, such as corrosion and precious liquids.

by coupling of the motor and outer magnetic steel together, impeller, with associated magnetic steel inside, between the inner and outer magnetic steel is equipped with fully sealed isolation cover, the inner and outer magnetic steel completely separated, the magnetic steel in the medium. And the motor shaft by magnetic steel magnetic attraction between synchronization directly to drive the impeller rotation. Main component is magnetic pump inside the pump body, impeller, magnetic steel, magnetic steel, isolation cover, inside the pump shaft, pump shaft and the sliding bearing, roller bearing, coupling, etc.

at present commonly used material for rare earth cobalt magnetic pump, is a new type of permanent magnetic steel. Such as samarium cobalt, aluminum nickel and cobalt, praseodymium cobalt, cobalt and mixed rare earth rare cobalt and copper, etc. Magnetic transmission efficiency is high, and with a strong ability of resistance to demagnetization, using temperature up to 300 cc, is also a rare earth permanent magnets. Basic performance and samarium cobalt is similar, but the magnetic energy product is higher than that of samarium cobalt, the disadvantage is that the magnetic stability is relatively poor. Once the operating temperature is higher than in the operation of the magnetic pump magnet steel, allowable temperature demagnetization effect will occur. Magnetic pump transmission medium is not allowed to contain iron has a ferromagnetic impurities or hard impurities.

because set inside the eddy current loss, in order to reduce the eddy current loss, improve the transmission efficiency and usually selects high resistance materials, the eddy current loss accounts for about 5% ~ 25% of total transmission efficiency. Non-metallic losses as set inside there is no electricity eddy, can improve the transmission efficiency, but low temperature resistant, generally only about 100 ~ 120 ℃.

in order to prevent bearing and isolation of overheating or burning, avoid by all means is idle running, not allowed to run at less than 30% rated flow, because of magnetic pump to eliminate the leakage of the shaft sealing, at the same time automatic overload protection in power transmission. In the petroleum chemical industry and medicine, etc, when driving power is not big, now has been gradually expanding the application.

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