Analysis of Abnormal Causes of Surface Dropping of Needle Roller Bearings
A part of the surface material of a moving-moving missile falls off like a fish scale. This phenomenon is called fatigue peeling. During operation of a moving-bearing bearing, a certain amount of load is applied, even if it is a static load. However, for steel balls and raceways, the stress is reincarnation. Reciprocating, the material will be fatigued and the bearing life will be achieved. There are also several different definitions of bearing “life,” one of which is the so-called “working life.” It means that the actual life of a needle roller bearing that can be achieved before it is damaged is due to wear and damage that is usually not caused by fatigue. It is caused by wear, erosion, seal damage, and other causes.
However, whether in laboratory tests or in actual use, it can be clearly seen that the same appearance of the bearing under the same working conditions, the actual life is very different.
The number of revolutions of the bearing life (or the number of hours of operation at a given rotational speed) is defined as: In the case of needle bearings within this life, initial fatigue damage (exfoliation or defect) should occur on any bearing ring or moving body. Most of the causes of bearing pumping are bad—more than the originally estimated load, inefficient sealing, too small bearing clearance caused by too tight fit, and so on.
Each of these factors has its own special damage pattern and leaves special signs of damage. Therefore, inspecting damaged bearings can be found in most cases as a possible cause. In general, one-third of needle roller bearing damage is caused by fatigue damage, and the other third is due to poor lubrication. The other third is due to contamination entering the bearing or improper installation handling.
However, these types of damage are also related to the industry. For example, the pulp and paper industry is mostly due to poor lubrication or contamination causing bearing damage rather than material fatigue.