A coal mining machine is a large and complex system integrating mechanics, electricity, and hydraulics, operating in harsh conditions. A malfunction can lead to a complete halt in coal mining operations, resulting in significant economic losses. As the coal industry evolves, the functions of coal mining machines become more diverse, and their structures and components increasingly intricate, thereby complicating the reasons for malfunctions. Below, we outline the key points to consider in the maintenance of coal mining machines.

Daily Maintenance and Management System for Coal Mining Machines

Daily Inspection:

1. Check for any crushing or damage to cables and pipes.

2. Ensure that all main component bolts are securely fastened and that the bolts connecting major components and iron wedges should be kept tightly in place at all times.

3. Operators exhibit agile and reliable movements.

4. Are the oil levels in all parts appropriate, is the oil emulsified with water, and are all the grease oil nozzles properly filled?

5. Check for any blockages or damage to the nozzles, and inspect if the water filter is clogged.

6. Are the cutting teeth worn or missing?

7. During machine operation, pay attention to any abnormal sounds from all parts, the temperature rise of each part, as well as the oil pressure, water pressure, and water distribution.

Inspect the engagement of the gear rack and pinion, as well as the wear condition of the guide slider and smooth slider.

Weekly Inspection

1. Inspect and clean the coarse and fine filter cores installed in the hydraulic transmission unit; the fine filter cores must be replaced in a timely manner.

2. Inspect the brake on the trailer, measure the friction pad wear, and replace them in sets if they exceed the specified limit.

3. Inspect that the working lubricant meets the required standards.

4. Verify that the pressure gauge is functioning properly.

5. Measure the oil temperatures at various parts of the coal mining machine and the inlet and outlet temperatures of the cooling water.

6. Inspect and handle daily issues that cannot be resolved, and keep a record of the overall machine's operating status.

7. Inspect the driver's daily maintenance of the coal mining machine.

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