1. The stainless steel magnetic pump has insufficient head.
The causes of such failures are: there is air in the conveying medium, the impeller is damaged, the rotation speed is insufficient, the specific gravity of the conveying liquid is too large, and the flow rate is too large.
2. The flow of stainless steel magnetic pump is insufficient.
The main causes of insufficient flow are: impeller damage, insufficient speed, too high lift, and blockage of debris in the pipe.
3. The pump shaft is broken.
The material of the pump shaft of the magnetic pump is 99% alumina ceramic. The main reason for the pump shaft breaking is that the shaft is twisted due to the dry running of the pump due to the dry running of the pump. When disassembling the pump, it can be seen that the bearing has worn out and the main way to prevent the pump from breaking is to avoid the empty running of the pump.
4. The stainless steel magnetic pump bearing is damaged.
The material used in the CQB magnetic pump bearing is high-density carbon. If the pump is shut off or there is impurities in the pump, the bearing will be damaged. If the coaxiality between the inner and outer magnetic rotors of the cylindrical coupling is not guaranteed, it will directly affect the life of the bearing.
5, stainless steel magnetic pump can not get liquid.
Pumping out the liquid is a malfunction that is easy to occur in the pump, and there are many reasons. First check the pump suction line for leaks, check whether the air in the suction tube is exhausted, whether the amount of liquid in the pump is sufficient, whether there is any debris in the suction tube, and check whether the pump is reversed (especially After changing the motor or after the power supply line has been repaired, you should also pay attention to whether the suction height of the pump is too high. If the above inspection still cannot be solved, the pump can be disassembled and inspected to see if the pump shaft is broken. It should also check whether the moving ring and static ring of the pump are intact, and whether the entire rotor can move in a small amount. If the axial movement is difficult, check if the carbon bearing is too tightly coupled to the pump shaft.
It is worth noting that the pump has been repaired several times and no problem can be found. It should be noted that the operation of the coupling is normal. The bearings, the inner magnetic rotor and the spacers generate heat during operation, which will increase the operating temperature, on the one hand, the power delivered, and on the other hand, the pump that transports the easily vaporized liquid will cause great trouble. The power transmitted by the magnetic steel is a continuous decreasing curve with the increase of temperature. Generally, below the working limit temperature of the magnetic steel, the drop of the transmission capacity is reversible, and above the limit temperature is irreversible, that is, the magnetic steel is cooled. Afterwards, the lost transmission capacity 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 not treated in time, the magnetic steel will demagnetize and the magnetic coupling will be invalid. Therefore, the magnetic pump should be designed with a reliable cooling system. For mediums that are not easily vaporized, the cooling circulation system generally draws out the liquid flow from the impeller outlet or the pump outlet, and returns to the suction port 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 to the outside of the pump. The storage tank should avoid heat returning to the suction port. For media with solid impurities or ferromagnetic impurities, filtration should be considered. For high temperature media, cooling should be considered to ensure that the magnetic coupling does not exceed the working limit temperature.
When considering whether the speed is enough, first check whether the speed of the motor itself is normal. It can be measured by the tachometer. If the motor speed is normal, consider whether the magnetic coupling slips.
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