1, the tile surface corrosion: spectral analysis found non-ferrous metal element concentration anomaly; there have been many non-ferrous metal components in ferrography sub-micrometer-diameter wear particles; lubricant excessive moisture, excessive acid value.
2, shaft surface strain: ferrography cutting abrasive particles or Black oxide of iron, metal surface temper.
3, shaft surface corrosion: spectral analysis found the iron concentration abnormal, many of ferrographic submicron particles of iron, excessive moisture or excessive acid value of lubricating oil.
4, surface injury: wear particles in ferrograph cut was found in, abrasive composition for non-ferrous metals.
5, w back fretting: spectral analysis found the iron concentration abnormal, wear of iron spectrum there are many iron in submicron particles, water and lubricating oil acid value exception.
Impact and control method of rolling ball bearings or bearings with larger models in under purely radial load at low speed operation, smaller due to the centrifugal force of the rolling, load-free area in the roll cage of rolling elements will shocks or road noise. But as the speed increases, this noise will disappear.
Roller roller bearing and its control method is when the bearing operation, rolling rolling rolling on the pavement and a slippery continuous noise, occurs is all rolling bearing-specific basic sound. General bearing rolling road sound with other sounds. Ball bearing roller is irregular, frequencies in the above 1000Hz, the frequency of rate changes with the speed, but its sound pressure level increases with the acceleration of the speed of.
Roller bearings, its acoustic sound pressure level of the Raceway with the increase and decrease of viscosity and roller bearings of the smaller, its sound pressure level in the viscosity increases to about 20mm2/s above, from reduction to increase. Greater the rigid housings, rolling road sound sound pressure level lower. As radial tour gap had small, roll road sound of sound pressure level and main frequency will as radial tour gap of reduced and sharp increased, if you didn′t want to let it has sound, best of approach is, put electric off, hehe, actually we can using some measures maximize of reduced bearing of noise, generally, to control combination bearing of noise effect, must for these noise of produced causes take countermeasures, to received root of effect.
More prone to occur during the winter months, when the plain radial bearing load, and susceptible to radial clearance, and with models of different sizes, occur at a specific speed range easily, both continuous and intermittent. External ring road, take the special processing methods can prevent the emergence of creak, if necessary, select the bearing, or appropriate reduction of radial clearance of bearings, using high performance grease and parts to match increasing bearing rigidity.