In order to determine whether the removed bearing can be reused, check the IKO bearing after it has been cleaned. Carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase in the clearance of the plane bearing, and the presence or absence of damage to the dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.
Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.
Large bearings cannot be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, and ribs. The higher the importance of bearings, the more careful inspection is required.
The judgment of whether it can be reused is determined by considering the degree of IKO bearing damage, mechanical properties, importance, operating conditions, and the period until the next inspection. However, if you have the following defects, you can no longer use them. New bearings must be replaced.
Although the noise caused by the manufacturing factor of the planar bearing is essentially caused by the manufacturing error, it is actually related to the choice of the lubricant, the mounting condition of the bearing, and the accuracy state of the shaft and the bearing housing. This kind of noise is divided into two types: cage sound and vibrating sound, which are described as follows:
(1) Cage sound and its control method Cage sound refers to the periodic vibration and noise emitted by the vibrating cage and the rolling element, which is easy to occur when the pocket is loose and the friction is large. This kind of noise mainly occurs in ball bearings and IKO bearings, and both the stamping cage and the solid cage occur, which occurs when grease lubrication or oil lubrication occurs, but the radial clearance is large when the lubrication is poor or the lubricant is dry. When the moment and the outer ring are subjected to the moment load, and when the structure of the cage is poor and the precision is not high, it is more likely to occur. In severe cases, the cage web or the rivet head may suddenly break.
Methods for controlling cage noise and vibration are: using lubricants with good lubrication properties; reducing bearing installation errors; radial clearance of compression bearings or appropriate axial preloading, and selection of cages with reasonable precision and reasonable structure Plane bearings, or replace IKO bearings with a strong and unworn cage.
(2) Vibrating sound and its control method The vibrating sound is the noise directly related to the waviness of the rolling surface of the plane bearing. This is a pure tone noise. For a constant speed, its frequency does not change, but for the changing speed. Its frequency also changes.
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