FAG bearing erosion effect on life of several kinds of performance

Bearing by using environment is different, so the erosion performance are also different, because the erosion in a different way. Import bearings, of course, also won't get away eroded this fate, here are speaking about a shaft FAG bearing erosion three ways. 1, the cavitation cavitation import bearings is contact with the liquid and solid surface generated by the relative motion form of surface damage. When the lubricating oil in the oil film of low pressure area, oil will form bubbles, the bubbles movement to high, the pressure under the action of air bubble breaking, the breaking of instant impact and high temperature, solid surface under the effect of the impact of repeated, material fatigue peeling, the friction surface appear small pits, and then developed into the cavernous scars. Overload, high speed, and the sliding bearing with higher load and speed, often occurs cavitation; 2, fluid erosion FAG bearing fluid erosion refers to the fluid fierce shock can cause fluid solid surface erosion, point to appear on the solid surface scars, the damage of the surface is smooth; 3, the electric erosion bearing electrical erosion refers to as motor or electric leakage, produce electric spark between the FAG bearing friction surface, on the friction surface caused by dot scar, is characterized by damage to and fro in a hard shaft neck surface. To predict the fatigue life of rolling bearing, residual life, we have to know all of the bearing fatigue damage phenomenon, this will take a long time. However, due to the rolling fatigue happened under the compressive stress of contact fatigue, to achieve damaged great material changes will occur. Therefore, in addition to early crack, raceway surface appear to suffer before chemical effect, the propagation of the crack material change, can judge FAG bearing fatigue testing material change. Imported bearing fatigue, can through the raceway surface residual stress measurement by X-ray machine, the half width of the diffraction line, the residual austenite dimension to grasp the change. These values, will be as the change of fatigue intensifies and appear. Due to residual stress will increase at the beginning of the fatigue and reaching saturation value, therefore, can be used to detect slight fatigue, but in fatigue larger extents, half width of the diffraction line with the change of retained austenite is associated with fatigue intensifying has certain. The X-ray test values as an index ( Fatigue index) , to find the relationship between and the bearing endurance test time. We use multiple sets of ball bearings, tapered roller bearings and cylindrical roller bearings under various load conditions, lubrication condition, the durability test and the test data accumulation. At the same time, also to the actual working condition of FAG bearing is tested again and again.