When turning the SKF bearings, should be very smooth without abnormal noise, and there should be no impurities. Running allowed light in a bearing noise, if the sound is too loud or unusual noise or impact sound, it indicates that the bearing is faulty. Bearing rust anti-rust oil with a slightly scented, but dosage is not. Makes the bearings clean and fragrant.
FAG bearings at the junction of the horizontal and vertical surfaces with a fine point, and has a black border.
Bearings in the course of normal use, parts of the bearing housings allow a certain degree of temperature, when shell when touching with the hands, should not feel hot as normal.
1. rolling sound control method for impact
Larger types of ball bearings or cylindrical roller bearings 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.
Methods: appropriate reduction of radial clearance, reasonable structure and material compliance of NSK bearings Cage.
2. rolling road acoustic control method
Raceway when TIMKEN bearings 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 the total sound pressure level increases with the speed faster. Roller bearings, rolling road sound sound pressure levels 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, rolling road, lower the overall sound pressure level of sound. Radial clearance is too small, and Raceway total sound pressure level and frequency increases with reduced radial clearance and increased dramatically.
Methods: Optional low noise bearings with bearing corrugated-small, carefully selected conditions of use. Raceway often affects the entire mechanical noise, reduce Raceway entire machinery noise could be reduced.
3. creak control method
Creak was cylindrical roller bearings on all occasions the possibility of harsh metal sound, mostly in the larger models of grease lubrication bearings and deterioration in the base oil in lubricating grease easier to, almost did not occur when the oil lubrication. In addition, easier in winter, when you are subjected to purely radial load, 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.
Methods: 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.
If INA bearings temperature is too high, you can consider whether the lubricant quality to meet the requirements or deterioration, factors such as the viscosity of lubricant is too high; or install body Assembly is too tight, too tight bearing Assembly; or rolling bearing cage fracture.
Noise of rolling bearings for many reasons, one is the bearing inner and outer rings fit surface wear. Again, insufficient bearing lubrication, the formation of dry friction, as well as the bearing crush generates abnormal noise.

 


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