Work under the special conditions of bearing

Bearing consists of inner and outer ring, roller ( Ball bearings, roller, or needle) And keep the frame of four parts. In addition to the cage, all bearing the bearing steel. When bearing, bearing, outer ring, bearings, the rolling body to withstand high frequency and differential stress between role. Bearing's working conditions are very complicated. Focused on the rolling element bearing load of a small area. In the point of the ball, theory; And on a line of treadmills, raceway and rolling body contact area is small ( A point or line contact) At work, so the bearing parts, roller and ring surface per unit area is in commonly under huge pressure, to; The rotation of the bearing, and under the action of centrifugal force, force increases with the rotating speed; Roller and ring and both rolling and sliding, so there is friction between rollers and ring. In under the joint action of the force, annular or roller surface fatigue cracks and fatigue resistance is low, eventually form the fatigue spalling, lead to bearing failure. The normal failure forms of bearing is contact fatigue damage, as well as the common plastic deformation, indentation, abrasion and crack, etc. Bearing life and reliability, although with bearing design, processing, manufacturing, installation, maintenance, lubrication condition, but the SKF bearing materials with high quality and reliability is the key. Rolling bearing parts under the complex stress state, the tensile, compression, bending, shear and alternating stress value, should work in high speed, long time. Therefore, the requirement of rolling bearing are: a) High resistance to plastic deformation, b) Friction and wear resistance, c) The rotation of the high precision and dimensional accuracy, d) Good dimensional stability, e) Long service life and high reliability. Work under the special conditions of bearing, there are some special requirements, such as high temperature resistance, low temperature resistance, corrosion resistance and water resistance, etc.