Affect the TIMKEN bearing vibration surface fatigue failure reason analysis

Determined by TIMKEN bearing structure design parameters of stiffness, flexibility, quality, such as damping of vibration system under the condition of operation will produce that can meet the needs of its mechanical vibration. Manufacturing process of the deviation caused by vibration, the smaller the deviation, the less vibration. Roundness, waviness and surface roughness on the surface of the steel ball is the biggest influence on vibration factors in the TIMKEN bearing parts, followed by the shape of the inner ring and outer ring channel error and surface roughness, again is bearing cleanliness and lubricant quality, etc. Operation conditions such as the installation conditions, speed, direction of axial load, quantity, etc. Bearing surface form of fatigue failure is a failure, mainly for fatigue crack initiation, expansion and fracture process, under alternating load generated by the fault of the long-term effects of the metal. Cracks in two aspects: first, on the surface, this is, TIMKEN bearing in the process of rolling contact, because of the work in the plastic deformation and strain hardening on the surface of the contact stress on the surface of the cyclical changes caused by the effect of external load, and finally on the inner surface of the small crack from the development, the formation of surface crack between the two, because Xie into the lubricant on the surface of the work, the power of the open, crack down on the wall, crack force to move forward; Second: from the surface, under the pressure of repeatedly, the surface contact, the first where exposed on the surface of the crack depth of a crack, and along the surface direction Angle, to a certain depth, since on the surface of contact area, and beyond the surface, and finally form the corrosion, leaving a horse pit.