Bearing damage exclusion maintenance

By bearing failure and deterioration, performance status parameters to determine and predict the reliability and performance of the bearing, the site of the abnormal situation, causes and degree of risk identification and judgment to decide restoration and improvement of the integrated technology. Therefore, the bearing fault diagnosis technology is not a simple fault detection (or monitoring) technology, nor is it a simple point inspection instrumentation. Correctly, quickly and effectively signal acquisition, data processing, manual or automatic identification and judgment. In order to determine the scientific repair cycle, the mechanism should be based on various types of failure, fatigue, wear life tests and estimates necessary.
Precision bearing fatigue failure is a failure surface forms, mainly for fatigue crack initiation, propagation and fracture processes in alternating load faults arising under long-term effects of the metal. Cracks in two ways:
1, on the surface, which is the process of rolling contact bearings, because the work surface plastic deformation and strain hardening of the surface of the contact stress caused by cyclical changes in the role of external loads, and finally in the development of small cracks from the inside surface, in between the formation of surface cracks, wedged into the surface as a result of lubricant power open to crack down on the wall, forcing the forward crack;
2, from the surface layer, again under the pressure of the contact surface, the first surface of the exposed areas of cracks cracks certain depth and angle of the direction along the surface to a certain depth from the surface of the contact surface, and beyond surface, and eventually the formation erosion stripped, leaving a Makeng.
From the bearing surface, or from the surface layer cracks, these two objectives (parts carburizing, quenching, and other surface treatment, the latter if there are uneven hardness, organization, and non-uniform stress and other negative, the contact stress generally from the opposite underground cracks under the influence, if the part surface quality is poor, there is a defect (oxidation and decarbonization), friction or poor lubrication, the surface cracks. raceway sound control methods are: selection of low-noise bearings that waviness small bearings, judicious selection of the conditions of use. raceway sound often affect the entire mechanical noise reduction raceway sound can reduce the overall mechanical noise.