Analysis of Vibration Characteristics and Influencing Factors of Dynamic Stiffness of High-speed Rolling Bearings
The vibration characteristics of rolling bearings under high-speed periodic load are studied.Based on the dy-namic equation of rolling bearing,with the 61896 deep groove ball bearing as the research object,dynamic simulation analy-sis of the bearing is carried out under the action of simple harmonic periodic force.The vibration response characteristics of rolling bearing are explored.The relationship between the modal frequency and amplitude-frequency that have the greatest influence on the bearing is clarified.On this basis,the influence law of bearing parameters,such as excitation frequency,ma-terial and number of bearing balls on bearing dynamic stiffness,are explored.It is found that the first order natural frequency of the structure is the maximum point of bearing resonance displacement,and the inner ring and roller are seriously dam-aged.Moreover,with the increase of excitation frequency,the vibration displacement value of the bearing shows a trend of increasing first and then decreasing.When it reaches the resonance frequency,the displacement value increases rapidly.In addition,before reaching the first frequency,the dynamic stiffness of the bearing decreases with the increase of excitation frequency and increases with the increase of the number of balls.When the ball material changes,the curve of dynamic stiff-ness of bearing against the frequency also changes.Among all the ball materials,the dynamic stiffness of ceramic silicon ni-tride Si3N4 is the best.
vibration and waveharmonic periodic forcemodal analysisharmonic response analysisdynamic stiff-nessinfluencing factor
万方数据
维普
