Abstract: Rolling bearings are one of the most important components in rotating machinery systems. The skidding of bearings withstanding frequent oscillating conditions seriously affects the dynamic characteristics of the bearings, resulting in early failure. Based on the theory of rolling bearing dynamics, the dynamic differential equations of oscillating deep groove ball bearings are established, and solved by the predictive-correction (Gear stiff, GSTIFF) variable step integration algorithm. Skidding characteristics of the ball which is always in the loading area, continuous access to the loading area and always in the non-loading area are studied. The results show that the skidding of the ball under the oscillating condition is obviously larger than that under the smooth running condition; the maximum skidding of the ball always in the non-loading area is larger than that always in the loading area, and of which the ball continuously enters and exits is in between. As the clearance increases, the skidding of the ball increases sharply and then increases slowly. The increase of the shifting time, radial load and lubricant coefficient, as well as the decrease of stability speed is beneficial to reduce the skidding of the ball during the oscillating motion.

Key words: oscillating, deep groove ball bearing, dynamics, skidding