Prevent NTN non-standard bearing erosion effect on life to master some matters

NTN bearing by using environment is different, so the erosion performance are also different, because the erosion in a different way. Bearing, of course, also won't get away eroded this fate, below is speaking about non-standard bearing erosion in three ways. 1, cavitation cavitation of NTN bearing contact with the liquid and solid surface is 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 load and the non-standard bearing with higher speed, often occurs cavitation; 2, fluid erosion of NTN 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 of NTN bearing electrical erosion means due to the motor or electric leakage, produce electric spark between the non-standard bearing friction surface, on the friction surface caused by dot scar, is characterized by damage reciprocating appear on the surface of the journal that hard. To predict NTN bearing fatigue life, 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, testing materials change might judge non-standard bearing fatigue. Maintenance of NTN bearing also must grasp the following points: 1, regular inspection using state, watch parts whether there are abnormal noise and local temperature rise sharply phenomenon; 2, regular, quantitative filling of lubricating oil or grease as required; 3, according to the vehicle usage, at least once every six months to completely replace the lubricating oil, and the review; 4, maintenance inspection method: to remove the wash clean with kerosene or gasoline, look carefully, both inside and outside cylinder for sliding or creep phenomenon, inner and outer raceway surface spalling, pitting, rolling element and cage for wear and deformation, etc. , according to the comprehensive situation of non-standard bearing inspection, determine whether to continue to use.