Teach You To Maintain The Electric Motor Of A Underground Mining Locomotive With Four Actions

In the process of using underground mining electric locomotives, everyone must also want to know how to do the usual maintenance and maintenance of coal mine electric locomotives, which has a major impact on our overall efficiency. However, we found that the focus of the department, but few employees can do the usual maintenance in detail, after observation and found that: related to the life of the initiator itself, the damage to the motor, more than 70% are repairs Staff are usually not as detailed as inspections and lack of maintenance.

1. Look: It refers to paying attention to the inspection of the situation and state of affairs of underground mining electric locomotive motors. The situation request, see if there are signs of water leakage and dripping around, whether there are any objects around the motor that affect its ventilation and heat dissipation, mainly whether the fan end cover, fan blades, and the outside of the motor can be cleaned. If problems are found, they will be dealt with in real time . Otherwise, it may cause low motor insulation and burnout. In the matter, pay attention to inspecting and recording the size and change of the motor current.

2. Listening: Pay attention to the motor during the event, and listen carefully to whether the sound of the motor is abnormal. If you listen often, you can not only find the bad vibration of the motor and its drag equipment, but also the internal bearing oil can be judged. Therefore, real-time response measures such as adding bearing oil or replacing new bearings will be punished. Prevent the motor bearings from running dry due to lack of oil and dry grinding.

3. Touch: After a period of time, touch the temperature around the motor of the mining locomotive with the back of your hand. In the case of better bearing conditions, the temperature at both ends is usually lower than the temperature at the center winding end. If it is found that the temperature at both ends of the bearing is high, the bearing must be checked in conjunction with the measured bearing sound situation. If the overall temperature of the motor is too high, it is necessary to combine the working current to check the load, equipment and ventilation of the motor to conduct a response punishment.

4. Measurement: Mainly: both online and offline measurement should be done well. On-line, when the motor is running, the voltage and current of its three phases must be measured to see if it can be balanced. The error between the current of each phase and the uniform value should not exceed 10%. If the current difference of each phase measured with a clamp meter is too large, there may be a short circuit between the turns. Off-line state means that when the motor stops the operation, it is necessary to regularly (monthly) use an insulation meter to measure its relative ground or phase-to-phase insulation resistance, and compare it with the test result of the previous month, in order to find any signs of insulation defects When it is found bad, use a tide lamp to bake and improve the insulation to prevent the breakdown of the motor due to the breakdown of the winding due to the insulation being too low.