Submersible pump is an important equipment for deep well water lifting. When in use, the entire unit dives into the water to extract groundwater to the surface, which is used for domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading, and can also be used for fountain landscapes. A submersible pump for wells is a water lifting equipment that is directly connected to a motor and a water pump, and works underwater. It is suitable for extracting groundwater from deep wells and can also be used in water lifting projects such as rivers, reservoirs, and canals. It is mainly used for irrigation of farmland and water supply for humans and animals in high-altitude mountainous areas, and can also be used for drainage in cities, factories, railways, mines, and construction sites.
Analysis and troubleshooting methods for three major faults of submersible pumps:
Due to environmental and time factors during the operation of submersible pumps, certain malfunctions may inevitably occur. In order to improve their work efficiency, we must promptly identify the cause and eliminate submersible pump malfunctions.
1, The submersible pump has abnormal vibration and instability during operation
The main reasons and troubleshooting methods for abnormal vibration and instability in the operation of submersible pumps:
1. The foundation bolts of the water pump base are not tightened or loose. (Tighten all foundation bolts evenly)
2. The outlet pipeline is not independently supported, and pipeline vibration affects the water pump. (Install independent and stable supports for the water pump's outlet pipe to prevent the flange of the water pump's outlet pipe from bearing weight)
3. The quality of the impeller is unbalanced, even damaged or installed loosely. (Repair or replace impeller)
4. The upper and lower bearings of the water pump are damaged. (Replace the upper and lower bearings of the water pump)
2, Submersible pump does not produce water or has insufficient flow rate
The main reasons and troubleshooting methods for insufficient flow or failure to produce water during the operation of submersible pumps:
1. The installation height of the water pump is too high, resulting in insufficient immersion depth of the impeller and a decrease in the water output of the pump. (The allowable deviation for controlling the installation elevation of the water pump cannot be arbitrarily expanded)
2. The water pump rotates in the opposite direction. (Before the trial operation of the water pump, idle the motor and check the direction of rotation to make it consistent with the water pump. If the above situation occurs during use, check whether the phase sequence of the power supply has changed.)
3. The outlet valve cannot be opened. (Check the valve and regularly maintain it)
4. The water outlet pipeline is not unobstructed or the impeller is blocked. (Clean up blockages in pipelines and impellers, and frequently remove debris from the reservoir)
5. The wear-resistant ring at the lower end of the water pump is severely worn or blocked by debris. (Replace the lower wear-resistant ring and clean up debris)
6. The density or viscosity of the liquid being pumped is too high. (Re equip with matching pumps)
7. The impeller is detached or damaged. (Reinstall or replace)
8. When multiple water pumps share the same pipeline output, there is no one-way valve installed or the one-way valve seal is not tight. (Install one-way valve and replace one-way valve seal)
3, The submersible pump does not turn when started
The main reasons and troubleshooting methods for submersible pumps not starting:
1. The power switch and plug have poor contact. (Repair or replace)
2. Control circuit fuse burned out. (Replace insurance)
3. The main circuit fuse is burnt out. (Replace insurance)
4. The capacitor of the two-phase submersible pump is burnt out. (Replace capacitor)
5. Three phase submersible pump is missing phase. (Connect the phase failure circuit)
