What Should I Do If The Motor Of The Deep Well Submersible Pump Cannot Start And Makes A Buzzing Sound? Teach You These Tricks To Solve

Jul 27, 2024

Sometimes we encounter situations where the motor of the deep well submersible pump does not turn after connecting the power, but keeps making a buzzing sound. What is the reason for this? Let's analyze several common phenomena and teach you some tips to solve them.
1, Lack of phase
Fault phenomenon:
When a motor with Y-shaped wiring experiences phase loss operation, from the top, the symmetrical stator core has three slots, i.e. one phase, and the insulation paper is basically intact. Additionally, the two-phase insulation paper undergoes deformation, melting, explosion, shell deformation, breakdown, and the bottom airbag ruptures.
Reason for malfunction:
1. The wire is heating up and the screws are loose when connecting the power supply.
If any phase is missing in the Y-shaped winding, there will be no current in the missing phase winding, and the current in the other two phases will be larger.
Solution:
1. Install the control box.
2. Use qualified cables, and the DC resistance of the cable should not exceed the minimum national standard.
2, Overheating (overload)
Fault phenomenon:
The single-phase motor overheats, causing the main and auxiliary windings to burn out during startup. If the damage is minor, the entire stator insulation layer will melt. If it is severely burned, the enameled wire will melt and explode, the shell will deform and puncture, and the bottom airbag will rupture.
Reason for malfunction:
Voltage too high or too low, cable too long and DC resistance exceeding the standard, cable cross-sectional area too small, pump head and flow configuration too high, poor water quality, and solid content exceeding the standard.
Solution:
1. Install a dedicated guide cooling cover outside the submersible motor to increase the surface water flow velocity of the motor and remove surface heat more quickly.
2. Use qualified cables, and the DC resistance of the cable should not exceed the minimum national standard.
3, Water ingress
Fault phenomenon:
There are water stains on the surface of the cable, but there are no broken wires. When using a multimeter to measure, it was found that the DC resistance was normal, but when using a shaking table to measure the insulation resistance, the pointer turned in the direction of zero or negative pole. At this time, it was found that some parts of the cable were worn, and the wires and cables leading out of the motor were connected incorrectly, with obvious water ingress.
Reason for malfunction:
Generally, it is caused by mechanical seals, due to poor environmental conditions in some areas, the shell corrodes and water enters, while in some areas, it is caused by cable wear, water leakage, and poor cable wiring, leading to water ingress. A few cases are caused by shell installation, airbag installation, motor head installation, and cable leakage.
Solution:
1. Improve the usage environment by correctly connecting the motor leads and cables.
2. It is recommended to replace the motor.
4, Sweeping the Hall
Fault phenomenon:
The cleaning of the motor rotor was caused by excessive wear of the motor bearings. It was found that the temperature of the motor had increased, and the motor made a "buzzing" sound. After disassembling the motor, circular scratches appeared on the rotor and stator due to wear.
Reason for malfunction:
1: Motor overheating causes small bearing clearance and jamming.
2: The rotor dynamic balancing accuracy does not meet the requirements.
3: Poor quality of bearings.
4: Caused by broken rotor bars, poor installation of bearings, upper and lower bearing chambers, etc.
5: The coaxiality of the stator, rotor, housing, and upper and lower bearings is poor, and the dynamic balance of the rotor does not meet the technical requirements.
Solution:
1. It is recommended to replace the motor.
2. After sweeping the hall, bearings can also be replaced.