Yu Sheng coupling analysis of the use of magnetic pump Note: After installation, turn the coupling by hand to check whether the phenomenon of rubbing. In order to prevent debris from entering the pump, a filter is provided at the inlet of the pump. The filter area is larger than the pipe cross-sectional area 3 to 4 times. Do not run air. Pumps with high heads should be equipped with check valves on the outlet piping to prevent water hammer damage from sudden shutdown. If the coaxiality between the inner and outer magnetic rotors of the coupling is not guaranteed, the bearing life will be directly affected.
Open the pump program: open the inlet valve before driving, fill the pump with the liquid to be delivered, close the outlet valve, and then move the electric hoist to check whether the pump's steering is correct. After the pump starts, the outlet valve should open slowly until the pump reaches After normal operation, adjust the outlet valve to the desired opening. Test run for 5~10min. If there is no abnormality, it can be put into operation. Parking procedure: Close the outlet valve; cut off the power supply; close the inlet; when it is not used for a long time, clean the flow path in the pump and cut off the power.
Maintenance points and methods: The pump shaft is broken. The material used for the pump shaft of the CQB type magnetic pump is 99% alumina ceramic. The main reason for the breakage of the pump shaft is that the shaft is broken due to the dry running of the pump due to the empty operation of the pump. When the pump is disassembled, it can be seen that the bearing is worn. The main way to prevent the pump from breaking is to avoid empty operation of the pump. Damaged bearings. CQB pump bearings are made of high-density carbon, which can cause damage to the bearing if the pump breaks water or contains impurities in the pump. Cylindrical pumps do not produce liquids. Pumping out liquids is a pump-prone failure, and there are many reasons for this. First of all, check whether there is leakage in the suction pipe of the pump, check whether the air in the suction pipe is discharged, whether the amount of liquid poured in the pump is enough, whether there is any blockage in the suction pipe, and whether the pump is 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 the axial movement is difficult, it can be checked whether the carbon bearing is too tightly coupled with the pump shaft.

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