1 watt surface corrosion: spectra showed abnormal concentration of non-ferrous metal elements; iron spectrum submicron wear particles of many non-ferrous metal components; lubricants excessive moisture, acid value exceeded.
Journal surface strain: Ferrography, cutting abrasive or black oxide particles of iron-based metal surface tempering color.
Journal surface corrosion: spectra showed abnormal concentration of iron, iron spectrum the many iron components submicron particles, lubricants excessive moisture or acid value exceeded.
4, the surface strain: Ferrography in cutting abrasive, abrasive ingredients for non-ferrous metals.
5, tile back fretting wear: spectra showed abnormal iron concentration, the many iron content in the sub-micron wear particles in the iron spectrum, lubricants moisture and acid abnormalities.
The larger models of the impact sound and its control method of the rolling element ball bearings or SKF Bearings under pure radial load low speed operation, due to the centrifugal force of the rolling bodies is smaller, in a cage or roll of the rolling bodies of the non-load area will impact Road noise. As the speed increases, the sound will disappear.
FAG bearings raceway sound and its control method raceway sound when the operation of the bearing rolling element raceway scroll issued a slippery continuous sound, a unique sound all Rolling occur. The general sound of the bearing raceway sound and other sound. The ball bearing raceway sound is irregular, the frequency of 1000Hz or more, its main frequency does not change with the speed, but its sound pressure level increases with engine speed to accelerate.
Roller Daosheng large bearing raceway sound SPL is reduced with the increase in viscosity; NSK bearings raceway sound small, the level is increased in viscosity to about 20mm2 / s or more, by reducing converted to be increased. The greater the rigidity of the bearing raceway sound SPL lower. Such as the radial clearance is too small, the raceway sound pressure level and the main frequency will be increased dramatically with the reduction of radial clearance, if you do not want it to sound, the best way is to turn off the electricity, , in fact, we can take advantage of some measures to reduce the the TIMKEN bearings of noise maximized, generally, to control the noise impact of the bearings, take countermeasures must address the root causes of these noises, the root of the problem in order to receive the results.
More likely to occur in the winter, when bearings by pure radial load, radial clearance occasions prone, and different size with Model within a certain speed range prone both consecutive happen can occur intermittently. Outer ring raceway special processing method can prevent jarring sound appear necessary choice of INA bearings or appropriate to reduce the radial clearance of the bearing performance grease and improve with bearings to match parts rigidity.


Other News:
The problems of bearing support structure
Bearing common troubleshooting measures principle
ommonly used bearing demolished skills
The predetermined condition of the bearing inspection
Adjustment of the bearing temperature is too high
Bearing repair reuse analysis
Bearing Ferrography
Bearing failure causes and preventive measures