In 2005, the water pump, export pressure in recent years decreased year by year, the running current is increasing, there are 4 pumps are like this. Professional personnel advice please!
The outlet pressure decreases, indicating a decrease in speed. The increase of the current shows that the load has increased. Generally speaking, the resistance of rotating parts increases. Check that the bearings of the pump and motor are damaged as soon as possible. As soon as you replace it, you will be able to return to normal. If this is done for a long time, the motor is likely to burn out
Export pressure reduction generally 2 reasons: 1, blade wear, 2. mechanical seal leakageThe increase of electric current should be caused by severe wear of the friction pairs of mechanical seals, resulting in increased resistanceIt is suggested that mechanical seals and blades be changed.
See if the impeller problem is loose or something else. Impeller problems are generally
The reasons are as follows:(1) motor guide bearing wear, water pump rubber bearing wear, sealing ring wearMotor or water pump bearings wear, will make the submersible pump in the machine on the wrong state of work, serious damage to submersible pumps, stator windings burned. The method is to repair or replace damaged bearings and bushings.(2) thrust bearing wear, submerged pump impeller and lower cover wearThis situation will also make the submersible pump on the machine in an abnormal state of work, serious damage to the submersible pump. The treatment method is to check the cause of the wear of the thrust bearing. Whether the mechanical seal of the shaft extension is damaged or not, which causes sand particles and impurities to enter the inner cavity of the motor, causes excessive wear of the thrust bearing. If it is caused by the mechanical seal of the submersible pump, the replacement of the thrust bearing, thrust plate and impeller, lower cover plate and other parts shall be replaced by mechanical seals at the shaft extension end.(3) the flow of the submersible pump is too large or too smallThe use of submersible pumps flow beyond the scope of use will make the motor overload of centrifugal pump or mixed flow pump, excessive flow, the pump shaft power increases, the motor overload; for the axial flow pump, the flow is too small, the pump shaft power increases, the motor overload. The treatment method is to adjust the valve properly, reduce the flow rate of the centrifugal pump or the mixed flow pump (increase the axial flow pump), and make the flow of the pump in the normal range of use.(4) the shaft of the submersible pump is bent and the bearings are not concentricThis is a serious case of submersible pumps, should be immediately overhauled, straighten the bent shaft, replace the unqualified bearings, re assembled submersible pumps.
