The influence of axial load on the load distribution

When the centripetal thrust bearing radial load R, due to the rolling element and raceway contact line and the bearing axis between a contact Angle alpha, and reaction force of each roller is not pointing in the direction the radius Ni, but along the normal direction of the contact points, it can be broken down into a radial component and an axial force component. With Pi on behalf of a rolling body reaction, of the radial component of the axial component of the Fdi should be equal to the corresponding Pi tg alpha. All the radial component force of Pi R 'and radial load R phase equilibrium; All Fdi of axial component of the sum of bearing derived axial force Fd, it forces journal ( Along with the bearing inner ring and rolling body) To the right, and finally, Fa and axial force balance. When only a rolling body under load, the load Angle and the contact Angle is equal. As the number of rolling element load increased, while at the same radial load under the action of Fr, but derived from the axial force Fd will increase. Because when applied to the rolling element in the direction of the radial force Pi each are not identical, although their vector and R 'and Fr balance, but the algebra and will outweigh the Fr, derived from the axial force of Fd is by the axial force is derived for each Pi Fdi synthetic, its value should be according to the Fdi of algebra and meter. So under the same radial load Fr, by the effect on the rolling element were derived from the axial force of Pi of the axial force Fd, than only a rolling body under load when the axial force of the derived. The above analysis shows that: 1) The centripetal thrust bearing must be R radial load and axial force under the joint action of A job. 2) For the same bearing, at the same radial load under the action of R, when the number of roller is not loaded at the same time, the axial force is derived different S, also requires different axial force A to balance it. Or, on the other hand, under the condition of constant radial load R, when the axial force by minimum value ( Fa = Frtg alpha, then by a rolling body under load) Gradually increase, The beta Angle increases) , which means that the number of rolling element bearing inner contact. To the actual work of centripetal thrust bearing, to ensure it can work reliably, should make it at least the second half of the ring rolling body full loading. When installing this type of bearing, therefore, cannot have larger axial channeling.