Causes and failure analysis of the bearing failure of bearing lubrication

Bearing lubrication is important for normal bearing, must strictly control the use of lubrication conditions in order to guarantee the precision bearing and stable life. Cause 

the failure of bearing lubrication are mainly in the following aspects, this paper focuses on the analysis of.

1.... interrupt bearing oil supply system: the majority of ball bearings and roller bearing failure is due to the bearing lubricant interrupt, or lubricating mechanism can not 

effectively lubricant properly transported to the roller and raceway contact area; in order to engine failure fatal fault aviation engine main shaft bearing, retainer after 

silver ball handling and the roller in the lubricant, temporary interruption, some silver will be transferred to the raceway, add lubrication to provide low coefficient of 

friction; friction coefficient ceramic ball and roller combined bearing is better than the low friction coefficient of bearing steel. Cross roller bearings

2 thermal imbalance: at the height of the bearing in operation, the rolling body, ferrule, maintain the temperature difference between the frame must be strictly controlled, to 

avoid bearing radial preload is too large, it will cause the rolling elements and raceways frictional heating increased, if the outer ring of the bearing inner ring radiating 

aluminum above, will cause too much friction bearing lock; firstly causes lubricant oxidation and degradation, lubricants and lubricant friction increases blackening; 

overheating will cause parts of the surface chemical precipitation; with the increase of the temperature of the bearings, bearing rings and rolling elements of steel hardness 

will decline, spring will be reduced, resulting in plastic deformation;‍