1, tile surface corrosion: spectral analysis of non-ferrous metal elements found abnormal concentration; iron appears in the spectrum of many non-ferrous metal components of sub-micrometer-diameter wear particles; lubricant excessive moisture, excessive acid value.
2, axle surface strain: the in ferrography cutting abrasive particles or Black oxide of iron, metal surface temper.
3, Journal of surface corrosion: spectral analysis of iron concentrations found exception, iron has many iron composition of submicron particles in the spectrum, excessive lubricant excessive moisture or acid.
4, surface strain: iron cutting wear debris were found in the spectrum, abrasive composition for non-ferrous metals.
5, w background fretting: spectral analysis of iron concentrations found exception, iron spectrum there are many iron components in submicron wear particles, water and lubricating oil acid value exception.
Impact sound and its control method of rolling ball bearings or bearings of larger models when running at low speed under purely radial load, due to the centrifugal force of the rolling small rolling elements will impact the non-loading area roll cage or road noise. But as the speed increases, this noise will disappear.
SKF bearings Raceway Raceway is sound and its control method when the bearing operation, rolling rolling rolling on the pavement and making a slippery continuous sound, is typical of all rolling bearings are basic. General bearing Raceway acoustic of sound that is combined with other sounds. Ball bearing Raceway is irregular, above 1000Hz frequency, frequency rate does not change with the speed of it, but its sound pressure level increases with the speed faster.
NSK bearings Raceway, its acoustic sound pressure level Raceway decrease with increasing viscosity; small bearings and raceways, the sound pressure level in the viscosity increases to about 20mm2/s above, by a reduction to increased. Greater the rigid housings, lower sound pressure levels of the Raceway. 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 don't want to let it has sound, best of approach is, to electric off, Oh, actually we can uses some measures maximize of reduced bearing of noise, generally, to control bearing of noise effect, must for these noise of produced causes take countermeasures, to received root of effect.
Easier in winter, when you FAG plain radial bearing load, the radial clearance is prone to big occasions, and with the size of different models, are apt to occur within a range of specific speeds, both continuous and intermittent. External ring road for special processing methods can prevent a creak from appearing, this bearing if necessary, or appropriate reduction of radial clearance of bearings, using excellent grease and improve matched bearings mechanical rigidity.

 


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