Causes and detection methods of abnormal noise of crossed roller bearings

A crossed roller bearing is a special type of bearing in which the inner ring is divided and the outer ring rotates. Compared with conventional models, the rigidity of crossed roller bearings is increased by 3 to 4 times. At the same time, since the inner ring or outer ring of the crossed roller bearing is divided into two structures, the bearing clearance can be adjusted, and even if a preload is applied, high-precision rotational motion can be obtained.

In our daily life, the bearing will encounter the problem of abnormal bearing noise after three or two years of normal use. The following are several methods for detecting abnormal noise of bearings summarized by crossed roller bearing manufacturers. Let’s take a look.

Cause of abnormal noise

There are many kinds of abnormal sounds during the operation of crossed roller bearings, the formation mechanism is relatively complex, and the factors are multi-faceted, and various abnormal sounds are often superimposed together, which is difficult to distinguish. The main reasons are as follows:

(1) There are periodic vibration pulses caused by bumps, scratches or serious defects in the inner and outer raceways of the bearing.

(2) Non-periodic vibration pulses caused by defects such as bumps and scratches on the surface of the rolling element.

(3) Periodic or aperiodic vibration pulses caused by the presence of residual magnetically adsorbed iron powder on raceways or rolling elements.

(4) The pulse of aperiodic vibration caused by impurities or dust entering the running area of the bearing raceway.

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