The reasons of the submersible pump run time flow deviation

Submersible pump running current is large and the adjustment of the pump valve and the mechanical failure of the motor have a certain relationship. The main reasons are as follows:

1, guide bearing motor wear, pump rubber bearing wear, sealing ring wear motor or pump bearing wear, can make the submersible pump in abnormal working state on mechanical, serious damage submersible pumps, the stator winding burn. Processing method is to repair or replace the damaged bearing and shaft sleeve.

2, submersible pump, the flow of small or large use traffic is beyond the scope to use can make the motor overload: for the centrifugal water pump or mixed flow pump, too much traffic, increase of pump shaft power, can make the motor overload; Of axial flow pump, the flow is too small, the pump shaft power increases, can make the motor overload. Processing method is to adjust the valve to the centrifugal water pump or mixed flow pump decrease to increase the axial flow pump flow, make the use of the flow of water pump in the normal range.

3, submersible pump shaft bending, bearing different heart This kind of a serious condition, should immediately for maintenance, bending straightening shaft, replace the unqualified bearing, reassemble submersible pumps.

4, thrust bearing wear, submersible pump impeller and the lower cover plate wear This kind of circumstance also can make the submersible pump in abnormal working state on mechanical, serious will also damage the submersible electric pump. Processing method is to check the cause of the thrust bearing wear, whether due to the damage of mechanical seal, shaft extension end caused by sand and impurities into the motor chamber of thrust bearing caused by excessive wear. If it is the cause of mechanical seal, the repair or replacement of wear under the thrust bearing, thrust plate and impeller, cover board and other components at the same time, should replace the shaft extension end of mechanical seal.

5, submersible pump running current is big about selection, head submersible pump selection is too large, the actual use of head is small.