When the submersible pump running current is too large and the adjustment of the pump valve and submersible pump mechanical failure have a certain relationship. The main reasons are:
1, submersible pump flow is too large or too small
Submersible pump flow exceeds the use of the submersible pump will overload: Centrifugal submersible pump or Francis submersible pump, the flow is too large, the submersible pump shaft power increases, the submersible pump will overload; axial submersible pump, Flow is too small, submersible pump shaft power increases, will submersible pump overload. Approach is to properly adjust the valve on the centrifugal submersible pump or Francis submersible pump should be reduced (axial flow submersible pump should be increased) flow, the submersible pump flow in the normal use of the range to avoid the use of submersible pumps Overloaded.
2, submersible motor bearings in the bearing wear and tear, pump rubber bearing wear, seal ring wear
Motor or pump bearing wear, submersible pump will make the machine in abnormal working condition, will seriously damage the submersible pump, the stator winding burn out. Approach is to repair or replace damaged bearings and bushings.
3, submersible pump motor thrust bearing wear, pump impeller and the lower cover wear
The motor thrust bearing wear, pump impeller and the lower cover wear, the same will make the submersible pump in the mechanical abnormal working condition, serious damage to the submersible pump. Treatment method is to check the thrust bearing wear reasons, whether the shaft end of the mechanical seal damage, resulting in sand, impurities, etc. into the motor cavity caused by excessive thrust bearing wear. If it is caused by mechanical seal, replace or replace the shaft extension mechanical seal while repairing or replacing the worn thrust bearing, thrust plate, impeller and under cover.
4, submersible pump shaft bending, bearing different heart
Shaft bending, bearing a different heart is a serious condition, should be immediately overhaul: straightening bent shaft, replacement of unqualified bearings, re-assembly submersible pump.