What is Brush in Submersible Pump? Benefit and Harm
In a submersible pump, the brush is an electric motor-driven part that keeps the water flowing. The brush has a magnetic field that drives the rotor inside the pump to rotate, pushing the water upwards.
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The brush may become worn, dirty or damaged over time. In this case, the efficiency of the pump decreases, the water pressure decreases or the pump stops working completely. Therefore, brush maintenance is important in submersible pumps.
How to maintain brushes on submersible pumps? First, disconnect the pump from the mains and remove it from the water. Wipe the outside of the pump with a clean cloth and dry it. Reach inside the pump by unscrewing the screws on the bottom of the pump.
Remove the springs holding the brush and pull the brush out. Clean the surface of the brush with a soft wire brush or sandpaper. If the brush shows excessive wear or breakage, replace it with a new brush.
Replace the brush and put the springs back. Close the pump by tightening the screws. Lower the pump back into the water and connect it to the electricity. Check that the pump is working.
What are the benefits of brush maintenance on submersible pumps? Brush maintenance on submersible pumps extends the life of the pump, saves energy and improves water quality.
It also reduces potential costs by preventing pump failure. Regular brush maintenance on submersible pumps is the best choice to meet your water needs.
Brush Replacement Steps in Submersible Pump
You can follow the steps below to change the brush:
- First disconnect the pump from the mains and remove it from the well.
- Remove the motor part of the pump and open the cover where the brushes are located.
- Remove the old brushes and install the new brushes. Make sure that the brushes are in full contact with the commutator or ring.
- Replace the brush cover and connect the motor to the pump housing.
- To test the pump, connect it to the mains and check that it works.
- If there is no problem, lower the pump back into the well and complete the process.
Fırça değiştirme işlemi ile ilgili daha fazla bilgi için bu kılavuzu inceleyebilirsiniz.
Why does the brush wear out in a submersible pump?
Since the brush in a submersible pump is part of the motor, the wear of the brush depends on the operating conditions and maintenance of the motor. The most common causes of brush wear are:
- Fluctuations or dips in electric current: A voltage or frequency inappropriate for the motor’s power can cause the brushes to overheat, spark or melt. In this case, the brushes as well as the commutator or ring of the motor may be damaged. It is recommended to use a voltage regulator or a protection relay to regulate the electric current.
- Motor overload: Pumping more water than the motor is capable of can cause the brushes to overload and wear out. In this case, it is necessary to adjust the flow rate and pressure of the pump or choose a more powerful motor.
- Dry running of the motor: If the motor is unable to draw water due to reasons such as a drop in the water level in the well or a blockage in the suction pipe, the brushes heat up and wear out. In this case, the pump must have dry run protection or constantly monitor the water level.
- Corrosion of the engine: The chemical composition of the water in the well can cause the metal parts of the motor to rust or corrode. In this case, the brushes can also be affected and wear out. In this case, it is necessary to analyze the quality of the water in the well and select a suitable pump material.
To prevent brush wear, it is necessary to regularly maintain the motor and check the condition of the brushes.
How Durable is the Brush in a Submersible Pump?
Since the brush is part of the submersible pump motor, the durability of the brush depends on the operating conditions and maintenance of the motor. In general, brush life is the life of the motor windings. Every 10 °C extra temperature rise in the motor windings halves the winding life.
Therefore, cooling the motor and preventing it from overheating helps to extend brush life. Also, preventing the motor from being exposed to risks such as voltage instability, dry running, overloading and corrosion increases brush life.
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