1, stainless steel magnetic pump head shortage.
Caused by this failure are: there is air in the conveying medium, the impeller is damaged, the rotation speed is not enough, the proportion of the transported liquid is too large, and the flow rate is too large.
2, stainless steel magnetic pump flow.
The main causes of insufficient flow are: impaired impeller, insufficient rotating speed, excessive head lift, blockage of debris in the pipe, etc.
3, the pump shaft breaks.
The material used for the pump shaft of the magnetic pump is 99% alumina ceramic. The main reason for the breakage of the pump shaft is that the shaft is broken due to dry running of the pump because the pump is running dry. When the pump is disassembled, it can be seen that the bearing has worn out. The main way to prevent the pump from breaking off is to avoid empty operation of the pump.
4, stainless steel magnetic pump bearing damage.
The material used for CQB magnetic pump bearings is high-density carbon, which can cause bearing damage if water is pumped off or there are impurities in the pump. If the coaxiality between the inner and outer magnetic rotors of the cylindrical coupling is not guaranteed, it will directly affect the bearing life.
5, stainless steel magnetic pump can not play liquid.
Pumping out fluids is the most likely cause of pump failures, and there are many reasons for this. First of all, check the suction piping of the pump for leaks. Check whether the air in the suction pipe is discharged, whether the amount of liquid poured into the pump is sufficient, whether the suction pipe is clogged with debris, and whether the pump should be reversed (especially After changing the motor or after the power line has been overhauled, care should be taken to ensure that the suction height of the pump is too high. If the above checks still cannot be resolved, the pump can be disassembled and inspected to see if the pump shaft is broken. Also, check whether the pump ring and the static ring are intact and whether the whole rotor can move in a small amount. If axial movement is difficult, check that the carbon bearing is too tightly attached to the pump shaft.
It is worth noting that no problem can be found when the pump is repaired several times, and it should be noted whether the coupling is working properly. Bearings, inner magnet rotors and spacers all generate heat during operation, which will increase the operating temperature. On the one hand, the transmitted power will be reduced. On the other hand, it will cause great troubles to the pumps that transport the easily vaporized liquids. The power transmitted by magnet steel increases with temperature, which is a continuous decreasing curve. Generally, below the working temperature limit of magnetic steel, the decline of its transmission capacity is reversible, but above the limit temperature, it is irreversible, that is, magnet steel cooling. After that, the lost transmission ability can no longer be restored. Under special circumstances, when the magnetic coupling is slipped (out of step), the eddy heat in the spacer will increase sharply, and the temperature will rise sharply. If it is not processed in time, it will cause demagnetization of the magnet and make the magnetic coupling failure. Therefore, the magnetic pump should be designed with a reliable cooling system. For a medium that is not easily vaporized, the cooling circulatory system generally draws fluid from the impeller outlet or the pump outlet and returns to the suction inlet through the bearing and the magnetic transmission part. For the easily vaporized medium, the heat exchanger should be added or the liquid flow should be led outside the pump. Storage tanks, to avoid heat back to the suction inlet, should be considered for the medium with solid impurities or ferromagnetic impurities, cooling should be considered for high temperature medium to ensure that the magnetic coupling does not exceed the working temperature limit.
When considering whether the speed is enough, first check whether the speed of the motor itself is normal or not, and use a tachometer to measure. If the speed of the motor is normal, consider whether the slippage of the magnetic coupling occurs.
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