Analysis Of The Causes Of Overload And Heating Of Submersible Pump Motors

Submersible pumps sometimes encounter overload and heat generation during use. What is the reason for this?
1. The issue of liquid density can cause overload of the motor when the density is too high or when pumping mud. The measured medium density is greater than 1.3, and even reaches 1.5-1.6; The power margin coefficient of the motor is relatively small (generally 1.05-1.2).
2. The problem of blockage of the impeller inside the submersible pump, accumulation of sediment inside the pump, and overload caused by the braking of the impeller.
3. The clearance of the rotor shaft hole and the clearance of the impeller ring are filled with mud and sand, causing overload caused by the braking of the shaft.
4. The motor power is smaller than actual, and some manufacturers reduce the motor power.
5. Not strictly following international ISO 9906 or current domestic standards for manufacturing and production.
6. The friction between the impeller and the pump body of the submersible pump results in the impeller being too large.
7. When the user reaches a high flow rate or head for the submersible pump, prolonged overload operation of the motor can cause the motor to heat up, ultimately leading to motor burnout.