You know what are the failure mechanism of the rolling bearing

For just contact bearing industry workers, many still don't know what are the rolling bearing failure mechanism, the following let's see: there are mainly abrasive wear and fretting wear, corrosion, wear, scratch, gluing, fatigue spalling, etc. 1, the abrasive wear due to the working condition of bearing, bearing of wear is also different. Under normal working conditions, also can have wear particle ( Such as dust, sand and other solid particles) Into the surface of the bearing; Will bearing bearing, grits surface as plane grinding, damage to the surface, so there will be a bearing performance deteriorated sharply before the life situation, mainly in the start, stop, or journal expected life when in contact with the edge of the bearings to geometry change, loss of accuracy, bearing clearance. 2, micro wear rolling bearing in the non-working state, due to the effect of external vibration load, or are in a slight oscillation condition, rolling body occurs near the raceway contact area small relative motion, because motion amplitude is small. Lubricating oil can't redistribute in the surface of contact area, and make the direct contact with the metal surface, and under the participation of oxygen interactions, leading to the corrosion of the metal surface, the oxidation of the metal chip at the same time, this phenomenon is known as the motion of rolling bearing wear, the wear is caused by the external environment of the inevitable wear. 3, corrosion and wear rolling bearing in the process of running, the inevitable contact with water, moisture and corrosive medium, which can cause rust and corrosion of rolling bearing; In addition, in the process of rolling bearing operation, also by micro electric current and electrostatic effect, caused by current corrosion of rolling bearing; Rust and corrosion causes of rolling bearing ring, rolling body surface rust pit type, pear skin rust, resulting in bearing failure. 4, scratched in the process of rolling bearing operation, large solid impurities in the bearing clearance, when relative movement occurs, impurities will not exercise at the same velocity, the velocity difference can make the surface draw shallow marks or deep groove, result in loss of bearing performance. 5, agglutination bearing work continuously for a long time, or maintain undeserved, and bear the heavy load will make the bearing temperature rise sharply, lubricating oil film instability; In the case of lack of lubrication and overloading, bearing surface will appear the phenomenon of uf in the, in the case of relative motion, can make the bearing surface rupture or bearing cannot work. 6, the fatigue spalling overload for a long time work, can make the metal bearing surface to the fatigue limit, the surface will appear as fatigue crack and the vertical crack expanding gradually, after serious finally appeared metal fatigue spalling, caused by loss of bearing performance. Due to the complexity of rolling bearing using occasions, environmental variable, such as rolling bearing performance loss is various failure modes of integrated performance.