Ceramic ball bearings and all steel bearing pre-tightening methods compared with the influence of rotating speed

Ceramic ball bearing stiffness change law and all steel bearings are similar, but changes more gently. Positioning preloaded, inner ring and ball centrifugal force, and the effect of friction heat made inside and outside the circle of contact load increase, the outer ring contact Angle decreased at the same time, the inner ring of contact Angle increases, so that the contact stiffness increases, but the decrease of the outer contact Angle to make slow with the increase of the axial stiffness and Angle. Under the constant pressure preload, ball increased centrifugal force makes the outer contact load increase, the contact Angle decreased at the same time. Due to internal and external ring allows the axial displacement, and the inner ring contact load basically remain unchanged, but the contact Angle increases. The thermal displacement and centrifugal displacement inner outer contact load and contact Angle has little effect. Despite the outer ring method to increase the contact rigidity, inner ring method to basically remain unchanged, the contact rigidity between series effect of radial stiffness increased as a result, but is not big, and the outer ring of the contact Angle decrease significantly reduce the axial stiffness and Angle. Positioning preloaded, ceramic ball bearing small Yu Quangang bearing stiffness, and under the constant pressure preload, the ceramic ball bearing large Yu Quangang bearing stiffness. Positioning preloaded, all steel bearing contact load is twice as tall as ceramic ball bearing above, although the ceramic ball high elastic modulus, all steel bearing stiffness is greater than the ceramic ball bearing. And under constant pressure preload, the inner ring contact load change is not big, ceramic ball high elastic modulus of ceramic ball bearing stiffness big Yu Quangang bearing.