How can the air compressor prevent the motor from burning down for 6 reasons
Motor burning is very common in daily life. The most effective preventive measure to prevent motor burning is correct skill protection.
The primary protection methods are as follows: six.
1. always insist on motor cleaning.
When motor is moving, it is necessary to insist on cleaning of intake.
Dust, water, grease and other debris are not allowed around the air inlet for at least 3 m to prevent being sucked into the motor.
If the dust, oil and water are absorbed into the motor, a short-circuit medium is formed, the insulation layer of the conductor is damaged, the inter-turn short circuit is formed, the current increases, the temperature rises, and the motor is burned down.
Therefore, it is necessary to ensure that the motor has sufficient insulation resistance, as well as excellent ventilation and cooling environment, so that the motor in a long-term operation in a safe and stable state.
2. work under extra load.
Motor overload operation, the primary reason is that the drag load is too large, voltage is too low, or drive the mechanical stuck.
When the motor is running under overload condition, it will cause the motor speed to drop, current to increase, temperature to rise, winding coil overheating.
If long-term overload, the motor insulation aging failure and burning at high temperature, which is the primary cause of motor burning.
Therefore, when the motor is running, we should pay attention to check whether the transmission is flexible and reliable, check and adjust the tightness of the transmission belt at any time, coaxiality of the coupling, if there is a phenomenon of stuck, should immediately stop to find out the cause of trouble before running.
3. three-phase current must be balanced.
For a three-phase asynchronous motor, the difference between the average current of any one phase and that of the other two phases is not allowed to exceed 10%, so as to ensure the safe and normal operation of the motor.
If the single-phase current value and the average value of the other two-phase current exceed the rule limit, then the motor is marked defective, it is necessary to find out the cause, eliminate the defect before continuing operation, otherwise the motor will be incinerated.
4. stick to normal temperature.
Always check the temperature of the bearing, stator, housing and other parts of the motor abnormal, especially for no voltage, current and frequency monitoring equipment and no overload protection equipment motor, temperature rise monitoring is particularly important.
If it is found that the temperature rise near the bearing is too high, it should be stopped immediately to see if the bearing is damaged or lacking oil. If the bearings are damaged, new bearings should be replaced before operation. If the bearings are short of oil, grease should be added. Otherwise, the bearings will be further damaged and lead to collapse, causing bore sweeping and incineration of the motor.
5. observe whether there is oscillation, noise and abnormal smell.
If the motor presents oscillation, it will cause the different axes of the machine connected with it to increase, so that the motor load increases, current increases, temperature rises and burns the motor. Therefore, when the motor is in operation, it is necessary to check whether the anchor bolts, motor end caps, bearing caps are loose, whether the connecting device is reliable, and to solve the problems in time.
Noise and odor are the abnormal operation of the motor. It is necessary to find out the cause in time to eliminate the malfunction. Otherwise, it will delay the opportunity, expand the malfunction, and become a major accident of burning the motor.
6. ensure the normal operation of the starting equipment.
The quality of motor starting equipment skill has a decisive effect on the normal starting of the motor. Otherwise, it is very simple that the motor will burn down before the motor has entered normal operation. Practice has proved that most of the reasons for burning motor are on starting equipment.
The protection of starting equipment is primarily cleaning and fastening. The unclean touch points of the toucher will increase the touch resistance and cause the heat to burn the contacts, forming a lack of phase and burning the motor. The rust and dust on the iron core of the coil sucked by the toucher will make the coil sucked loosely, and announce the intense noise, increase the coil current, and cause trouble by burning the coil.
Electrical control equipment should be placed in a dry, ventilated and easy-to-operate position, and regular dust removal, tightening the wiring screws, to see if the toucher contacts touch outstanding solid, mechanical parts are flexible, accurate, so that it adheres to outstanding skills, and then ensure smooth start without burning the motor.
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