1. Common explosion-proof motor failures

When using explosion-proof motors, we may encounter the following common failures:

Motor does not start:Motor failure to start is one of the most common problems in use. This is usually manifested as no response after the motor is connected to the power supply, or difficulty in starting.

Motor overheating: The motor temperature is too high during operation, and it may even trigger the protection device to automatically cut off the power. Overheating not only affects the performance of the motor, but may also cause serious safety hazards.

Abnormal current: When the current exceeds the rated value during motor operation, it may cause the current protection to trip.

Abnormal vibration and noise: The motor has abnormal vibration and noise during operation, which may affect the normal use of the equipment.

Bearing failure: The motor bearing is damaged or operates poorly, resulting in increased friction and reduced efficiency.

2. Analysis of the causes of explosion-proof motor failure

Reasons for the motor does not start

Power supply problem: Insufficient power supply voltage or phase failure may cause the motor to fail to start. This situation is usually caused by power line failure or unstable voltage;

Wiring error: Motor wiring error or poor contact can also cause failure to start;

Starting device failure: Failure of equipment such as controller and starter will affect the start of the motor.Reasons for the motor overheats

Overload operation: Long-term overload operation will cause the motor to heat up severely;

Poor heat dissipation: The motor ventilation duct is blocked by dust and debris, resulting in poor heat dissipation;

Excessive ambient temperature: The working environment temperature is too high, affecting the normal heat dissipation of the motor.

Reasons for abnormal current

Load fluctuation: Drastic load changes may cause current fluctuations;

Internal short circuit: Winding insulation damage leads to internal short circuit, causing abnormal current;

Unstable power supply: Large fluctuations in power supply voltage cause current changes.

Reasons for abnormal vibration and noise

Mechanical failure: Loose or worn internal parts of the motor can cause vibration;

Unstable foundation: The motor is not installed firmly and the foundation is uneven, resulting in vibration during operation

Bearing wear: Bearing damage or lack of lubrication leads to vibration and noise.

Causes of bearing failure

Poor lubrication: Lack of lubricating oil or deterioration of lubricating oil leads to increased bearing wear;

Improper installation: Incorrect bearing installation or excessive axial force leads to damage;

Pollution intrusion: Dust and dirt enter the bearing, causing it to be damaged.

3. Preventive measures for explosion-proof motor failures

To avoid the occurrence of the above-mentioned failures, we need to take a series of preventive measures:

Regular maintenance and overhaul

Check the power supply and line: Regularly check the integrity of the power supply voltage and line to ensure that it is stable and reliable;

Maintain wiring: Ensure that the motor wiring is correct and the connection is tight;

Check the starting equipment: Regularly test and overhaul the controller, starter and other equipment to ensure that they function properly.

Strengthen heat dissipation management

Clean the ventilation duct: Regularly clean the motor ventilation duct to ensure unobstructed heat dissipation;

Control the ambient temperature: Optimize the working environment of the motor to avoid excessive temperature.

Control the load and current

Reasonably configure the load: Ensure that the motor load operates within the rated range;

Monitor current fluctuations: Monitor the current through the monitoring system and adjust it in time.

Reduce vibration and noise

Tighten mechanical parts: Regularly check the internal and foundation tightness of the motor to prevent loosening;

Check the bearing status: Regularly check the bearing wear and replace it in time.

Bearing management

Proper lubrication: Add lubricating oil to the bearing regularly and ensure the cleanliness of the lubricating oil;

Prevent pollution: Make sure the bearing is well sealed to prevent dust from entering.

The failure of explosion-proof motors not only affects the operating efficiency of the equipment, but may also bring safety hazards. Through regular inspection and maintenance, we can effectively prevent most failures from occurring.

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