Date: 2013-08-22

Solutions and preventive measures of SKF self-aligning ball bearing failure.

In the operation, installation of cylindrical roller bearing parts allows a certain temperature, when the hand touch body shell, should not feel hot to normal, and show that SKF bearing temperature.
Causes of bearing temperature SKF: lubricating oil quality does not meet the requirements or deterioration, lubricating oil viscosity is too high; preloaded mechanism ( insufficient clearance ); adjustable preloaded ball bearings; bearing race rotation on the shaft or shell; overload; bearing retainer or rolling body fracture etc..
1 ), the roundness of the shaft and hole and verticality shoulder according to the corresponding to the requirements of the accuracy of cylindrical roller bearing.
2 ), not only to accurately calculate the amount of interference of rotating rings fit, to accurately calculate the appropriate amount and fixed rings. Rotating ring of burning of interference where possible should be made smaller. As long as the guarantee of working temperature thermal expansion effects, as well as the highest speed under the effect of centrifugal force, without causing tight fit creeping or sliding on the surface. Fixed rings depending on load size and bearing size, select a very small clearance fit or interference fit, too loose or too tight is not conducive to precise shape.
3 ), self-aligning ball bearing such as running in the condition of high speed, and high working temperature, special attention should be paid to cooperate with rotating rings must not be too loose, to prevent the emergence of the eccentric vibration, and with the fixed ring may not appear gap, to prevent the ring in the deformation under load and excitation vibration.
SKF bearings is allowed in the work of the minor operation noise, if the sound is too large or unusual noise or sound, it indicates that the bearing failure.
Causes noise rolling bearings are more complex, one is self-aligning ball bearings, with surface wear. Due to the wear, damage the bearing shells, SKF bearings and shaft, causes the axis deviates from the correct location, the shaft noise in high speed motion. When the bearing fatigue, its surface metal flake, also bearing radial clearance increases the noise. In addition, insufficient lubrication of the bearing, the formation of dry friction, as well as bearing broken produces abnormal sound. After bearing wear loose, loose cage damage, also can produce abnormal sound.
Self-aligning ball bearing failure occurred during operation is constant some thing, so don't get excited over a little thing. A fault, judgment and treatment is the key.  

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Next: Analysis of causes of FAG spherical roller bearing rolling noise

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