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Bearing operation and peripheral parts of SKF bearing equipment regular maintenance, replacement was disassembled for inspection, in order to determine the bearing parts can be used and record the use of good and bad again. But also carefully investigated and documented bearing and appearance were removed. In order to understand and investigate the remaining amount of lubricant, after sampling, to properly clean the bearings.
Secondly check SKF bearing raceway surface, rolling surface and surface condition and cage wear, no damage and anomalies in particular to observe the running track of the raceway surface. Judgment bearing will use again, to bearing damage degree, the machine performance, importance, operating conditions, such as checking cycle later decided.
Check the results, if it is found that the bearing damage and abnormal situation, please follow the bearing damage phenomenon to find out the reason, countermeasures. In addition, the inspection results, if there are some defects in it, the bearing can not be used, need to replace new bearing.
A. inner and outer ring, rolling body cage, in which any cracks and debris.
B. inner and outer ring, rolling body which any split.
C. raceway, rib, rolling card significantly hurt.
D. retainer wear or loosen rivets.
E. raceway surface, rolling rust and bruises.
F. surface of rolling, rolling a significant indentation and trace.
A creep of G. inner diameter of surface or outer diameter.
H. thermal discoloration.
I. grease sealed bearings seals and shields to serious damage.
Rolling road sound source is the inherent vibration caused by load ring after. Due to the elastic contact rings and rolling elements of nonlinear vibration system. When the lubrication or machining precision is not high it will inspire the vibration associated with the elastic characteristics, transfer into the air into a noise. As everyone knows, even using the modern technology of manufacturing the highest machining bearing parts, its work surface there are tiny geometric error is not a degree, so that the raceway and rolling body produce tiny wave excitation vibration vibration system.
Although SKF bearing raceway noise is unavoidable, but can take high precision machining parts work surface, the correct selection of denoising bearing and precise use of the bearing so that the damping.
Rolling road sound is due to rotation of the bearing rolling body raceway rolling in and create a smooth and continuous noise, only when the sound pressure level or tone greatly when attention. In fact, the rolling sound excited acoustic energy is limited, such as in the normal condition, the quality of the 6203 bearing raceway acoustic ranged from 25 to 27dB. Single row deep groove ball bearing this noise to bear radial load as the most typical, it has the following characteristics:
A. noise, vibration is random;
B. vibration frequencies above 1kHz;
C. No matter how changes in speed, noise frequency and sound pressure level is almost the same with the speed increase;
D. when the radial clearance increases, the sound pressure level increases sharply;
Rigid E. bearing increases, the lower the total sound pressure level, even if the speed increased, the overall sound pressure level increases slightly;
F. lubricant viscosity is high, the sound pressure level is low, but for grease lubrication, the shape and size of the viscosity, the soap fiber can affect the value of the noise.