Precautions For Daily Maintenance Of Submersible Pumps

Apr 18, 2025

Submersible pump is an important equipment for deep well water lifting. The entire unit is submerged in water during use. Extracting groundwater to the surface is used for domestic water, mining rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading, and can also be used for fountain landscapes. Hot water submersible pumps are used for hot spring bathing, and can also be used for extracting groundwater from deep wells, as well as for water extraction projects such as rivers, reservoirs, and canals. Mainly used for farmland irrigation and water supply for people and livestock in high mountain areas, it can also be used for central air conditioning cooling, heat pump units, cold pump units, urban, factory, railway, mining, and construction site drainage. The general flow rate can reach (5m ³~650m ³) per hour, and the head can reach 10-550 meters. The development and usage requirements of water pumps are combined with technological progress, and there are many types of water pump development. Submersible pumps can be divided into well submersible pumps, working face submersible pumps, submersible sewage pumps, sand discharge submersible pumps, mining vertical pumps, etc.

Urban sewage is transported to sewage treatment plants through pumping stations, which rely on submersible sewage pumps for pressurized lifting. The normal operation of submersible sewage pumps is closely related to the water environment conditions that are closely related to people's lives and production, and is an important prerequisite for ensuring people's quality of life and enterprise economic development. During the operation of submersible sewage pumps, various malfunctions often occur. Only by promptly and effectively solving the various malfunctions of submersible sewage pumps can we ensure the safe production and operation of enterprises and the normal development of residents' water life.

When excavating foundations and burying underground pipelines in urban construction, underground water discharge is the first and foremost problem to be solved, and the key to solving the problem is to use submersible sewage pumps to complete this pumping task. However, sludge often contains garbage and stones of different specifications, which can cause blockages at the pump outlet or entangle the impeller, preventing the motor from rotating and leading to the shutdown of the submersible sewage pump.
Sewage pumps have received increasing attention and are being used in a wider range, from simply transporting clean water to transporting various types of domestic sewage, industrial wastewater, construction site drainage, liquid feed, and more. It plays a very important role in various industries such as municipal engineering, industry, hospitals, construction, restaurants, and water conservancy construction.

Attention should be paid to the following issues during the operation of submersible sewage pumps:

(1) Always pay attention to the sound and vibration of the submersible sewage pump. If the sound of the unit is abnormal or there is significant vibration, stop immediately, check the cause, and promptly eliminate it to prevent accidents from happening.

(2) Always pay attention to the position of various instrument pointers, and if there are sudden changes, check the cause. Usually, when the reading of the vacuum gauge suddenly rises, it is likely caused by the water level in the inlet pool falling too low or the inlet pipe being blocked by debris. The sudden drop in pressure gauge reading is likely caused by a decrease in engine speed or air being sucked into the pump. After identifying the cause, efforts should be made to eliminate it.

(3) Regularly check the temperature and lubrication condition of the bearings. For bearings lubricated with oil rings, attention should be paid to whether the oil rings rotate flexibly. The bearing oil should be added in a timely manner to maintain an appropriate amount of oil. Too much or too little oil can cause heating. The oil quality should be clean. Generally, sliding bearings should change the oil every 200-300 hours of operation, but at least once every six months; Rolling bearings should be inspected and supplemented every 1500 hours of operation. For new water pumps, oil should be changed in advance.

(4) Pay attention to whether the packing box is normal, and there should be continuous water dripping from the packing (usually around 30 drops per minute). If there is too much or too little, adjust the gland screw to ensure that the packing is tightly compressed to the right degree.

(5) Regularly check whether there is any air leakage in the inlet pipeline, packing box, etc. When there is an air leakage, the reading of the pressure gauge will decrease and there will be abnormal noise inside the pump. Measures should be taken to prevent air leakage; Otherwise, the water output will decrease, and in severe cases, there may be no water output.

(6) Regularly check for floating objects near the inlet pipe to prevent blockage of the inlet. When the water level in the inlet pool drops too low, the operation should be stopped; Otherwise, a vortex will be generated at the inlet, drawing air into the pump. If the water level in the pool is low but can maintain pumping, in case of urgent drought resistance, a wooden board can be placed on the water surface where vortices are generated to prevent air from entering the pump, which is beneficial for the operation of the water pump.

(7) The unit with belt drive should keep the working surface clean and dry. When the belt surface emits light, oil can be added after removing the grease and dirt on the belt surface to prevent belt slippage, and the tightness of the belt should be monitored at all times.

(8) When pumping water from sediment laden rivers, it should be noted that the sediment concentration should generally not exceed 7%; Otherwise, it will significantly reduce the efficiency of the water pump, decrease the flow rate, and make the overcurrent part prone to wear and tear.

(9) Drain the water from the pump and pipeline to prevent freezing and damage to the pump and related equipment.

(10) Timely wipe off water and oil stains on the water pump and pipelines to maintain the cleanliness of the unit.