Analysis of additional load on SKF bearings

Source: China Bearing Network Time: 2017-09-26

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SKF bearings are sometimes in a stop condition; at very low speeds or at very low rocking frequencies; accepting large loads; when this load is large enough, it will appear in the most tumbling roll and ferrule touch area Corresponding plastic deformation; constitutes indentation or pit; incurs the accuracy of the operation; causes oscillation and noise; causes the imported bearing to quickly lose the necessary work function before the onset of fatigue damage; it is necessary to try to control the plastic deformation of the bearing operation Within a reasonable range. Therefore, the quality of SKF bearings is also very important.
According to the large-scale experiment; when the load accepted by the SKF bearing causes the maximum amount of plastic deformation between the rolling body and the ferrule rolling contact surface of the maximum stress; if the numerical value does not exceed one ten thousandth of the diameter of the corresponding rolling body; It does not affect the smoothness of the SKF bearing work; it does not adversely affect the fatigue life of the bearing; therefore, such a fine plastic deformation is adopted as the allowable plastic deformation of the rolling bearing touch position; and the bearing accepts the main plasticity The deformation does not exceed the above maximum allowable plastic deformation load is defined as the additional static load of the bearing. The additional static load characterizes the ability of the bearing to withstand large loads or shock loads under stopped conditions or under extremely slow relative motion conditions.
About SKF ball bearings; radial additional static load refers to the contact between the steel ball and the channel with the greatest stress; the radial static when the total length of the SKF bearing steel ball and channel is 0.0001 times the diameter of the steel ball Load; in the meantime, the single-row angular touch ball bearing; its radial additional static load refers to the radial load weight that causes the ferrule to only have a pure radial relative displacement in the practical load.
The axial additional static load refers to the contact between the steel ball and the raceway where the stress is the greatest; the intermediate axial static load when the SKF bearing steel ball and the channel permanent deformation are 0.0001 times the diameter of the steel ball. Sub-bearing; if the roller and raceway are in no-load action; it may be assumed that there is a touch busbar (full-line touch); then the radial additional static load refers to the roller and the track touch where the stress is greatest; The total static deformation of the roller and the raceway is 0.0001 times the radial static load of the roller; in the meantime, the single-row angular contact roller bearing; the radial additional static load means that only the ferrule is opposite in the total load. The radial displacement is somewhat radial weight.

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