How to Perform Major Repair on a Mining Long Distance Axial Flow Fan Blower?

Major repair involves a comprehensive inspection and repair of the fan blower, typically conducted every three years. This process requires a high level of professional expertise and takes a considerable amount of time. Therefore, it should be organized and executed by professional staff.

The procedures for major repair of the fan blower include:

Collecting and analyzing the operational parameters and related issues of the fan. Submitting a major repair request. Developing a major repair implementation scheme. Formulating safety and technical measures for the major repair, including emergency preparations. Organizing and executing the repair work.

Main Contents of Major Repair

1. Fan Casing

Clean dust from the inner and outer surfaces of the casing.

Inspect and repair casing welding gaps.

Correct any deformations in the casing.

Tighten the riveting of the rolling ring copper band of the fan.

Inspect and repair the brake system.

Inspect and repair the drainage hole device.

Inspect, repair, or replace the muffler device.

Replace all connection and sealing parts.

Clean rust from the entire fan and repaint it.

2. Motor

Clean the outer casing of the motor.

Clean or replace the filler and discharge pipes.

Inspect and repair the motor heater.

Replace the shaft and grease.

Clean flameproof parts, remove rust, and apply anti-rust oil.

Inspect the temperature measuring device of the shaft and stator winding group.

Scrub the motor terminal.

Detect insulation of the stator winding group.

Inspect for damage and rust on the motor main shaft.

Conduct operational tests of the motor installation machinery.

Remove rust and repaint the outer casing.

3. Impeller

Clean dust from the impeller hub and blades.

Detect cracks in the hub and blades.

Remove rust, apply anti-rust oil, and repaint the impeller.

Perform static and dynamic balance tests.

4. Supporting Facilities

Inspect and repair other supporting facilities of the fan, such as the air door, electric control system, and online monitoring system, simultaneously.

By following these detailed procedures and focusing on these critical areas, the major repair of a mining long distance axial flow fan blower can be conducted effectively, ensuring the longevity and optimal performance of the equipment.