SKF bearing failure for many reasons, like failure of the seal, in addition to normal bearing fatigue spalling tight with the result of factors over small bearing clearance or poor lubrication can leave special traces of failure and failure modes. Checks spherical bearing failure can be found in most cases lead to bearing failure, to take timely measures to prevent the corresponding. In general, bearing failure, 1/3 is because the bearings to fatigue flaking is normal failure; 1/3 because of poor bearing lubrication lead to premature bearing failure 1/3 of pollutants into the spherical bearing or not installed correctly in advance failure. Generally in terms of bearing not functioning properly, the following seven common symptoms: bearing overheating, bearing noise, bearing life is too low, vibration, amounting to less than machine performance requirements, loose bearings in the shaft, shaft rotation difficult.
 
(1) bearing raceway groove sound and its control method sound operation of SKF bearings, rolling element raceway surface of the scroll and to issue a slippery continuous sound is all rolling bearings are unique basic sound. General, spherical bearings sound raceway sound and other sounds. Bearing raceway sound is irregular, the frequency above 1000Hz, its main frequency does not vary with speed change, but its overall sound pressure level increased with the accelerated speed. Bearing raceway sound, the raceway sound of the sound pressure level is reduced with increasing viscosity; raceway sound small, SKF bearings, its sound pressure level increase in the viscosity of 20mm2 / s and above, reduction in turn be increased. Bearing rigidity greater the total sound pressure level, the lower raceway sound. If the radial clearance is too small, the raceway sound pressure level and frequency sharply increased with the reduction of the radial clearance. Control raceway sound: selection of low-noise bearing waviness small bearings, careful selection of the conditions of use. The raceways sound often affect the mechanical noise, reduce the the raceways sound can reduce the mechanical noise.
 
(2) the impact sound of the rolling body and control methods of the larger types of bearings or spherical bearings in the low-speed operation under pure radial load, due to the centrifugal force of the rolling element is smaller, in the non-load rolling will impact remains rack or raceway noise. But as the speed increases, the sound will disappear. Control method of the impact sound of the rolling bodies are: appropriate to reduce the radial clearance, the use of the rational structure of the material supple cage of SKF bearings.
 
(3) bearing the jarring sound and its control method jarring sound is harsh metal grinding sound, bearing on all occasions that may occur mostly in the larger models bearing grease lubrication, deterioration in the performance of the base oil lubrication fat more likely to have almost no oil lubrication. In addition, during the winter are more prone to prone when under pure radial load, radial clearance of the occasion, and with different model size, prone to a particular speed range, both on a continuum will intermittently appear. External ring raceway to take special processing methods to prevent jarring sound, and can choose such a spherical bearing or appropriate to reduce the radial bearing clearance, the use of the excellent performance of the grease and improve the matching parts and bearing rigidity.



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