Conical roller bearinng :https://www.bearingroller.com/rolling-elements/taper-roller/
The pre-tightening of the bearing is to use some method during installation.A certain axial pressing force is generated in the bearing to eliminate the bearing Axial clearance (also known as play) and inside and outside the tapered roller The ring contact has a certain deformation, and the pre-tightened bearing is subjected to the radial and axial deformation of the inner and outer rings are relative to the working load.It is much smaller when there is no preload, so the transmission is guaranteed to be accurate.Can withstand a certain load. At the same time, the bearing preload can be improved bearing stiffness, guarantee the rotation accuracy of the shaft movement.
The bearing preload force has the running quality of the support shaft.Significant impact, if the pre-tightening force is small, the relative start-up is more easy, less friction, but the rotation accuracy is not high; if it increases pre-tightening force can effectively improve the rotation precision and bearing energy of the bearing force, but the bearing is difficult to start, the friction is larger, and the efficiency is lower.There is an optimum value for the bearing preload, which has an important relationship with the bearing speed, temperature rise, load, spindle deformation, bearing life, lubrication conditions, etc.
A large number of experiments must be carried out to determine the optimum preload of the bearing.In view of the importance of bearing preload, this article focuses on common pre-tightening method for tapered bearings, measurement of pre-tightening force and pre-tightening adjustment and control methods.
