Magnetic pumps are mainly composed of pump heads, magnetic drives, motors, and connecting plates, which are widely used in many industries. However, during the use of magnetic pumps, faults often occur, causing the pump to malfunction. The following is a summary of five common faults.
1. Bearing damage. The material used for the bearings of the magnetic pump is high-density carbon. If the pump runs out of water or there are impurities inside the pump, it will cause damage to the bearings. If the coaxiality requirement between the inner and outer magnetic rotors of the cylindrical coupling cannot be guaranteed, it will directly affect the service life of the bearing.
2. Insufficient head. The causes of this malfunction include: air in the conveying medium, damaged impeller, insufficient rotation speed, excessive specific gravity of the conveyed liquid, and excessive flow rate.
3. The shaft is broken. The material used for 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 and broken due to the dry wear of the bearings during the pump's idle operation. When disassembling the pump for inspection, it can be seen that the bearings are severely worn. The main way to prevent the pump from breaking is to avoid idling the pump.
4. Insufficient traffic. The main reasons for insufficient flow are: impeller damage, insufficient speed, high head, and blockage of debris inside the pipe.
5. Unable to dispense liquid. The inability of a magnetic pump to produce liquid is the most common malfunction of the pump, and there are also many reasons for it. Firstly, check whether there is any air leakage in the suction pipeline of the pump, whether the air inside the suction pipeline is discharged, whether the amount of liquid filled in the magnetic pump is sufficient, whether there is any debris blocking the suction pipe, and whether the pump is reversed (especially after replacing the motor or repairing the power supply line). Also, pay attention to whether the suction height of the pump is too high. If the above inspection still cannot solve the problem, the pump can be disassembled for inspection to see if the pump shaft is broken. The dynamic and static rings of the pump should also be checked for integrity, and the entire rotor should be able to move slightly axially. If axial movement is difficult, check if the carbon bearing is too tightly combined with the pump shaft.