Sound is due to the rotating roller roller bearing in rolling, fired on a stable and continuous noise, only when its sound pressure level or sound, has aroused great attention. In fact, the sound inspired by roller wave energy is limited, because in normal circumstances, roller bearing 6203 twenty five-twenty sevenths DB higher quality sound. This noise is the most typical load radial single row deep groove ball bearings, it has the following characteristics:
A. noise and vibration is random;
B. vibration frequency higher than 1kHz;
C. changes both in speed and frequency noise, sound pressure level is almost the same and the rate of increase;
D. when increased radial clearance, sound pressure level significantly increased;
E. increased bearing stiffness, less overall sound pressure levels, even if the speed increases, the overall sound pressure levels do not increase;
F. lubricant viscosity, higher sound pressure levels are lower, but grease lubricant, viscosity, SOAP and fiber size can affect the shape of the noise.
SKF bearing fatigue failure was a failure of the surface form, mainly for fatigue crack initiation and extension and fracture process, the long-term effects of alternating load resulting from failure of metal.
1, low overall bearing precision: choose provides accuracy of bearing
2 hole concentric bend, spindle or box method: repair of spindles or box
3, belt too tight: adjust belt tension proper
4, poor lubrication method: select grades of lubricating materials and provided appropriate cleaning
5, low Assembly quality: improving Assembly quality
6, bearing shells lap method: replace the wear of bearings and related parts
7, method of axial force is too large: cleaning, adjusting seal ring gap required between 0.2~0.3mm, correct balancing of the impeller diameter and checking static balance value
8, bearing damage method: replace bearings
Control method of Raceway: Optional low noise bearings SKF bearings corrugated-small, carefully selected conditions of use. Acoustic noise affecting the entire machinery of the Raceway, Raceway reduction can reduce the noise of the machinery as a whole.