Well submersible pump heat the cause and the treatment method

Wells submersible pump is suitable for the extraction of groundwater from a deep well, also can be used in rivers, reservoirs, canals and other water projects: it is mainly used for farmland irrigation and plateau mountainous area with water, can also cities, factories, railways, mines, construction site water supply and drainage.Often have a net friend online consulting Wells with submersible pump motor of high temperature problem, the following is the Shanghai weihu pump industry to organize the related content.

The following is the cause of the high temperature in Wells submersible pump motor analysis:

1, Reason analysis

(1) motor power, and wide working current, calorific value is big.

(2) low fan speed, air pressure, air volume is small.

(3) the fan blade number is less, the air volume is small.

(4) motor with dust, grease, reduce the heat dissipation capacity.

(5) the well submersible pump motor bus voltage of 380 v, due to the pressure drop of the cable and the uneven distribution of load, motor actually only applied voltage 365 v, the voltage on the low side caused running current.

2, the processing method

The motor power, rotational speed is and Wells with submersible pump matching, cannot be changed.Fan installed on the motor shaft, motor speed determines the fan speed, and do not change.To increase the number of the fan blade can play a role, but after leaf number increased, dynamic balance is not easy to find, such as looking for is bad, will cause motor vibration increases.

(1) a former fan cover 40 cm long, inside with a diameter of axial flow fan with fan cover, axial flow fan motor power 850 w, the speed of 1489 r/min, voltage 380 v.To retain the original fan.The axial flow fan in power control all the way, do not set chain of axial flow fan and the main motor.Wells with submersible pump start-up start axial flow fan in time after operation, the Wells submersible pump shut down 30 min after shutdown axial flow fan, so that the main motor is fully cooling;

(2) to remove dust on the motor regularly, keep the motor heat sink clean, increase the cooling capacity;

(3) adjust gear pump in the busbar voltage is 400 v. 

3.Effect

(1) due to their high axial flow fan speed, air pressure air volume is big, greatly enhance the cooling effect, in the same environment temperature, the electrical load flow, main motor temperature dropped 12 ℃.Main motor temperature to overrun in summer.

(2) the axial flow fan can be controlled artificially, main motor after shutdown, axial flow fan can still run, fully cooling can make the main motor.

(3) the balance of 2 period of bus load distribution as far as possible, in case of a certain period of busbar voltage drop caused by overload too much.

(4) after the voltage adjustment, the diaphragm pump running current dropped to 210 a, calorific value is less.

(5) reducing the speed of the main motor insulation aging and prolong its service life. 

Above is the reason why high temperature Well submersible pump and processing method of related introduction, if you have other problems, can directly call our technical experts, experts will give professional answer.