Common faults and troubleshooting methods of explosion-proof motors
Explosion proof motors are special motor equipment with high risks. Once rust and rust spots appear on the explosion-proof surface, causing poor contact between the contact surfaces, harmful media will take advantage of the opportunity to enter and corrode the parts and winding insulation inside the machine. Once the explosion-proof motor loses its explosion-proof function, the consequences will be unimaginable. Therefore, timely searching, repairing, and troubleshooting of explosion-proof motor faults is of great significance.

The causes and elimination methods of explosion-proof motor failure are roughly as follows:

1) Due to improper maintenance and installation, the explosion-proof surface is severely corroded. Therefore, it is necessary to adopt the correct installation process and carefully inspect and maintain according to the maintenance system.

2) The explosion-proof surface has suffered severe mechanical damage. This is caused by improper installation or transportation lifting, and if repair is difficult, a motor of the same type must be replaced.

3) The sealing ring is damaged and does not function as a seal. This is due to improper tightening of the screws. Tightening the screws too tightly and applying excessive force can cause the sealing ring to crack; When the fastening screw is too loose, the sealing ring is susceptible to external corrosion, which can also cause damage and lose its sealing function. Poor sealing ring material can also cause premature damage, so it is necessary to replace it with qualified sealing material.

4) The explosion-proof surface is severely deformed. This is due to insufficient machining accuracy of the components, improper material handling, and improper operation. Uniform force is required during installation, and machining should be carried out according to the accuracy and roughness of the drawing. It is difficult to repair motors with severe deformation of the explosion-proof surface, and it is necessary to replace the motor with a new one if necessary. Slight deformation, caused by improper installation, can be reassembled.

5) Poor daily maintenance, manifested in the following aspects: too much dust and dirt, not cleaned in a timely manner; Loose screws, not checked and tightened in a timely manner; Insulation becomes damp and insulation resistance decreases; The explosion-proof surface is corroded, etc. Therefore, it is necessary to carefully follow the maintenance procedures for inspection and repair work.

6) Electric motor overheating. The common causes and solutions for motor overheating are as follows: ventilation system malfunction; The fan is damaged or the model is incorrect. The solution is to conduct regular inspections and maintenance, and promptly address any existing issues; The motor bearing has a malfunction, causing the iron core of the motor to sweep the bore, which is equivalent to overloading the motor. It is necessary to replace the qualified bearing in a timely manner; If the motor is overloaded, the load size should be readjusted according to the capacity of the motor; The power supply voltage should be kept at the rated value when it is too high or too low; The motor is corroded, and the sealing components and screw fastening should be checked; Winding faults, such as winding short circuit, single-phase open circuit, winding grounding, etc., should be checked and repaired in a timely manner.