Botou XINLAN analyzes the main points of the use and maintenance of magnetic pumps

Precautions for the use of magnetic pump: After installation, turn it by handCouplingCheck for scratches.In order to prevent sundries from entering the pump, a filter is installed at the inlet of the pump, and the filter area is 3-4 times larger than the cross-sectional area of ​​the pipeline.Dry operation is strictly prohibited.Pumps with high lift heads should be equipped with check valves on the outlet pipes to prevent water hammer from being damaged by sudden shutdowns.If the coaxiality requirements between the inner and outer magnetic rotors of the coupling cannot be guaranteed, it will directly affect the life of the bearing.
　　Procedure for starting the pump: Open the inlet valve before driving and fill the pump with the liquid to be conveyed; close the outlet valve; turn on the electric lift to check whether the steering of the pump is correct; after the pump is started, the outlet valve should be opened slowly until the pump reaches After normal operation, adjust the outlet valve to the required opening.Test run for 5~10min, if there is no abnormality, it can be put into operation.Shutdown procedure: close the outlet valve; cut off the power supply; close the inlet. When the pump is not in use for a long time, clean the flow passage in the pump and cut off the power supply.
　　Maintenance points and methods: the pump shaft is broken. The material used for the pump shaft of the CQB magnetic pump is 99% alumina porcelain. The main reason for the pump shaft breaking is that the shaft is twisted due to the dry running of the pump and the dry grinding of the bearings.When the pump is disassembled and inspected, it can be seen that the bearings have been severely worn. The main way to prevent the pump from breaking is to avoid the dry running of the pump.The bearing is damaged. The material used in the bearings of the CQB pump is high-density carbon. If the pump is cut off or there are impurities in the pump, the bearings will be damaged.Cylindrical
　　The pump cannot pump liquid.The failure of the pump to pump liquid is a common failure of the pump*, and there are many reasons for it.First of all, check whether the suction pipe of the pump is leaking, check whether the air in the suction pipe is discharged, whether the amount of liquid filled in the pump is sufficient, whether there is debris in the suction pipe, and whether the pump is reversed ( Especially after the motor has been changed or the power supply line has been overhauled), pay attention to whether the suction height of the pump is too high.If you still can't solve the problem through the above inspections, you can disassemble the pump and check to see if the pump shaft is broken. You should also check if the moving and static rings of the pump are intact, and whether the entire rotor can move a little bit axially.If the axial movement is difficult, check whether the carbon bearing is too tightly combined with the pump shaft.