There are many reasons for the failure of a direct connected single -stage centrifugal pump. Common equipment failure, installation failure, operation failure and selection errors. If the pump cannot be started normally, the pump cannot be pumped or the flow is insufficient, the pump vibration and noise, the heating of the bearings, the power of the pump, the air erosion, etc. The judgment of the centrifugal pump failure is to judge the basic indicators and maintenance experience of the equipment status.

Periodic examination:

The cycle check can generally be divided into the following three types:

1. Daily inspection, even if the inspection is used, as described above;

2. Monthly check, clean and small repair of the equipment without disassembling parts, including inspections such as the temperature of the bearings, the cause of the shaft leakage, and the insulation of the motor;

Third, regular maintenance. Including replacement of shaft lubricating oil, checking pumps and motors to the middle situation, checking the wear of the axis, checking the damage of the liquid rubber ring, cleaning mechanical sealing, coolant pepper filter and pump filter, checking the wear of sliding parts The corrosion of each component of the liquid is damaged.

Preparation before booting:

In order to ensure the safe operation of the pump, the necessary inspections should be performed before booting: Use your hand to slowly turn the shaft or the belt wheel to observe whether the water pump turns correctly, whether the rotation is flexible, and smooth. Whether it is appropriate; check whether all screws are solid; check that there are miscellaneous objects that are not hindered by operation; check whether the drowning depth of the water absorption pipe is sufficient; if there is a water outlet valve, it should be closed to reduce the starting load and pay attention to the valve in time after starting.

Examination during operation:

After booting, check whether the various instruments work normally and stable, and the current should not exceed the rated value. Pressure gauge pointer