Bearing failure of the life of several influencing factors
Any bearing life depends largely on the care and maintenance it receives. This is especially true in the industrial applications, it is often poor working conditions, load weight, dust and pollution is a common scale.
Applicable to the design of all of the anti-friction bearing. The skf bearings store special anti-corrosion coatings bearings are available, but most bearing anti-corrosion material. In the handling and storage of bearings, care must be taken to ensure that they will not rust or corrode. Even chemical glove is wet or unprotected relationship left hand or a small amount can lead to etching in a small region, which may lead to bearing fatigue.
The new change and restructuring bearing protective coating shipments, usually in a protective cover paper or other packaging, and in a cardboard box or wooden box shipped. When received a new or remanufactured bearings from packaging until ready to install the application.
Do not be stored directly on the concrete floor, where condensate collection and bearings. Tray on store shelves or bearing, fag bearings there will not be the area of high humidity or sudden and drastic temperature changes may cause condensation to form.
1, cavitation
nsk bearings Cavitation is the solid surface in contact with the liquid, and for relative movement is generated when the form of surface damage. When the lubricating oil when the low pressure area of the oil film, the oil will be the formation of bubbles, the bubble movement to the high-pressure zone, the bubble collapse under pressure, a great impact force and a high temperature, solid surfaces in the moment of collapse in this repeated impact, material fatigue off, the friction surface of the small pits, and then developed into a sponge-like scars. Overloading, high-speed, and load and speed changes in a large plain bearings, cavitation often occurs;
2, fluid erosion
timken bearings fluid erosion is the fluid fierce impact on the solid surface will cause the fluid erosion, punctate scars on the solid surface, this damage the surface smooth;
3, the electrical erosion
Electrical erosion of the bearing means of the motor or electrical leakage, the spark is generated in the bearing between the friction surfaces, and cause point-like scars on the friction surface, wherein the injury reciprocating harder journal surface.
In order to predict the fatigue life of rolling bearings, to determine the remaining life, we need to understand all the ina bearings fatigue failure phenomena, this will take a long time. However, due to the rolling contact fatigue fatigue occurs at the point of contact under compressive stress, to achieve breakage will occur a great deal of material changes. Therefore, in addition to the early cracks on the surface raceway suffered chemical effects of crack extension prior to the material change detection material changes likely to judge the degree of fatigue of the bearing.




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