Bearing on the working environment and the bearing performance requirements
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| Time：2016.09.06 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Bearing from the inside, outer ring, rolling elements (ball, roller or needle) and the holder of four parts, in addition to the holder, the rest are made of bearing steel components. When the bearing work, bearing, outer ring, rolling element bearings among withstand high frequency, variable stress. Bearing working conditions are very complex. Load is concentrated in a small area on the rolling elements. Theoretically the ball acting point; and for the rollers in a line between the ring and the rolling element and the contact area is small (with as point / line contact), thus bearing parts at work, it per unit area of the rolling elements and the surface of the ferrule to bear on a lot of pressure, generally up 1500-5000N / mm2; rotation of the bearing, but also to withstand the centrifugal force, the force increases with the speed increase; the rolling elements and sets exist not only between the rolling ring, but also the slide, so between the rolling elements and rings, there are still friction. The combined effects of these several forces, on the ferrule or rolling element surface fatigue strength of parts of the first low-fatigue cracks, and finally the formation of fatigue spalling, damage and failure of the bearing. Damage in the form of bearing contact fatigue damage is normal, there is a common plastic deformation, indentation, abrasion, crack.
Although the life and reliability of the bearing and the bearing design, manufacturing, lubrication, installation, maintenance and other factors, but the quality and reliability of the bearing material is the key. Under the bearing parts to be in tension, compression, bending, shear, alternating complex stress state and high-stress, high-speed and work long hours. Therefore, the rolling bearing is required to have:
1) a high resistance to plastic deformation,
2) high resistance to friction and wear properties,
3) high rotational accuracy and dimensional accuracy,
4) good dimensional stability,
5) long life and high reliability.
For the bearings, there are special requirements for working in special conditions, such as high temperature resistance, low temperature resistance, corrosion resistance and anti-magnetic, and so on.
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