不同工况下高速角接触球轴承-刚性转子系统动力学耦合特性分析

根据建立的高速角接触球轴承-刚性转子系统动力学数值仿真模型,以某仪表轴承支承的转子系统为算例,分析了考虑转子振动与否对系统动力学性能的影响,并详细探究了轴向载荷以及转速对转子振动、轴承内部载荷分布及旋滚比、保持架的受力和质心运动以及磨损情况的影响.结果表明:考虑转子振动时,在纯轴向载荷下,轴承各位置处的球载荷也会存在差...

Analysis of dynamic coupling characteristics of high speed angular contact ball bearing-rigid rotor system under different working conditions

According to the established complete dynamic numerical simulation model of high-speed angular contact ball bearing-rigid rotor system，the effect of rotor vibration on the dynamic performance of the system was analyzed，and the effects of axial load and rotating speed on rotor vibration，load distribution and spin-roll ratio in bearing，cage mass center motion wear were also discussed.The results showed that:when the rotor vibration was considered，the ball load at each position of the bearing differed even under the pure axial load，and for the cage mass center motion including the inner ring frequency，its stability became poor.With the increase of axial load，the rotor vibration and bearing slip decreased.However，with the increase of bearing ball load，the wear of inner and outer raceways first decreased and then increased，and the wear was the minimum when the axial load was 4 N.Both the cage stability and wear increased with the increase of axial load.With the increase of the rotating speed，the vibration of the rotor and bearing wear increased，while the stability of the cage first increased and then decreased.Once the rotating speed reached 40 000 r/min，the bearing wear and the cage stability deteriorated sharply.