Common damages and repair methods of air compressor bearings (B)

When the screw air compressor is running, the bearing connects the motor and the main engine. The motor drives the rotor of the main engine to rotate and compress the air. Therefore, the bearing bears a very large pressure when the air compressor is working, and it is also a part that is prone to damage. So what are the common damages to air compressor bearings? How to fix it?

Damage 5: The cage is damaged

Cage damage generally manifests as loose or broken rivets in the air compressor and cracked cage. Excessive moment load, high-speed rotation or frequent speed changes, poor lubrication, large vibration due to stuck foreign objects, and installation in an inclined state may cause this kind of damage. The repair method is to check the usage conditions and lubrication conditions, reselect the cage, and pay attention to the use of bearings.

Damage 6: Rust and corrosion

The bearing surface is partially or completely rusted. Rust may be caused by poor storage conditions, improper packaging, insufficient rust inhibitors, intrusion of moisture, acid solutions, etc., or direct contact with the bearings during maintenance. The repair method is to strengthen the sealing performance, check the lubricating oil regularly, and be careful not to let the bearings come into contact with liquid during use.

Injury 7: Peeling

The running surface of the bearing is obviously uneven after peeling off. Excessive bearing load, improper use, improper installation, insufficient bearing accuracy, too small clearance, foreign matter intrusion, rust, and abnormal high temperature may cause this damage. The repair method is to check the corresponding installation method, check the bearing accuracy, and check the use conditions including lubricating oil and lubrication method.

Damage 8: Creep

Bearing creep refers to the slippage of the inner or outer diameter of the bearing, causing mirroring or discoloration, and sometimes jamming. The cause of this damage may be insufficient interference at the fit, insufficient tightening of the sleeve, excessive load, or abnormal temperature rise. The repair method is to readjust the interference, improve the use conditions, and check the accuracy of the shaft and bearing box.

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