bearings

Bearing is an important part of contemporary machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. In actual use, the bearing life is related to the working environment, temperature, etc. The operation of the bearing and the motor is accompanied by, when the life of the bearing is terminated, the motor will then have serious quality failure.

Under normal circumstances, the metal fatigue of the rolling contact surface is the main factor of rolling bearing damage, and more critically, the bearing needs to be systematically managed and analyzed, such as the impact of bearing cage, raceway and lubrication and other related factors, which play an important role in the life of the bearing.

In fact, any kind of product has its service life, because it cannot avoid the influence of external factors in its operation; Secondly, the two sets of bearings with the same specifications and models are basically impossible to have the same operating environment, which makes it difficult to determine whether the two can have the same service life. If the application conditions are harsh or improper use, the life of the motor bearing will be greatly shortened.

Some motors choose open bearings, that is, grease needs to be added during assembly, and the grease is closely related to the bearing speed and actual operating temperature. Especially in some cases with high ambient temperature, the requirements for the high temperature resistance of greases and bearings are relatively severe, so the daily maintenance of bearings is more important, otherwise it will lead to noise and burn problems caused by poor lubrication of bearings.

Reasonable determination of bearing life is a very important thing for bearing users. Due to the difference in manufacturing accuracy and material uniformity, even if it is the same material, the same batch of bearings of the same size, used under the same working conditions, its life length is also different. Therefore, whether in laboratory tests or in actual use, it can be obviously seen that the appearance of the same bearing under the same working conditions is very different.

In addition, there are several different definitions of bearing "life", one of which is the so-called "working life", which means that the actual life that can be achieved before a bearing is damaged is caused by wear, damage is usually not caused by fatigue, but by wear, corrosion, seal damage and other reasons.