1.When the fan is in operation , why the bushing of the sliding bearing is worn or damaged ? How to deal with it ?
Causes and treatment of bearing liner Wear
Poor shaft lining , too small contact radian or poor contact , too small slope of oil storage groove at sub - surface of lower half - shaft lining
Rescrape and straighten the liner
Cracks, abrasions, spalling, melting, wear and shelled on the surface of the shaft liner
Re casting bushing or repair bushing
2.What is the cause of the overheating or damage of the thrust bearing during the operation of the fan, and how to deal with it?
The reason is that the balance disc gas seal leakage, should repair the balance disc air seal in time.http://www.jnblower.com/