What are the Key Points for the Operation and Maintenance of Mining Axial Fans?

Mining axial fans are crucial for ensuring proper ventilation in mining operations. Here are some essential points to consider for their operation and maintenance:

1. Operation for Different Distances

Short Distance Ventilation: Use a single-stage fan for short distances.

Long Distance Ventilation: Use two-stage or multi-stage fans for contra-rotating to achieve efficient ventilation over longer distances.

2. Pre-Operation Checks

Ensure the fan is free of debris before operation.

Verify that all fasteners are complete and tightly connected.

Confirm the correct rotation direction of the impeller.

Conduct a test run to ensure flexibility and absence of abnormal noises.

Perform regular inspections during operation and maintain a detailed log.

3. Safety Measures

Do not hang or place any foreign objects near the air inlet side of the fan to avoid them being sucked in and causing accidents.

If the protection grate of the collector is damaged, the fan must not be operated.

4. Operational Inspections

Regularly check for normal operational sounds and any loose parts during fan operation.

5. Silencer Maintenance

Over time, the silencer holes can become blocked by dust. Clean them with high-pressure airflow to maintain the fan’s silencing effect.

6. Bearing Maintenance

Ensure the bearing operating temperature does not exceed 95℃ (checked with a thermometer) and that operational noise is normal.
Inspect the bearings at least every 2500 hours of operation, approximately every six months.

If the bearing grease degrades, replace it promptly. Clean the bearing with gasoline before applying new grease, preferably Molykote grease, filling 1/2 to 3/4 of the bearing housing clearance volume.
Replace damaged bearings immediately.

7. Motor Maintenance

Protect the flameproof surface while disassembling the motor.
Apply 204-1 anti-rust oil to the flameproof surface to prevent rust.

8. Regular Repairs

Conduct minor repairs every six months.

Perform major repairs annually.

9. Professional Management

Ensure that professional staff manage, operate, and maintain the fan.

By adhering to these guidelines, you can ensure the efficient and safe operation of mining axial fans, extending their lifespan and maintaining optimal performance in your mining operations.