摘要
文中研究了压缩机转子临界转速和不平衡响应的分析计算。电机在旋转过程中产生的径向不平衡磁拉力,作用在转子上,会对其临界转速产生影响。利用有限元法提取了电机气隙径向磁密,合成不平衡磁拉力,并计算在不平衡磁拉力影响下的压缩机转子临界转速;计算转子对于某些位置上的不平衡量的敏感程度;求解轴承-转子系统频率方程并求得复频率,画出了复特征值对应的对数衰减率曲线,分析了轴系的稳定性。
This article introduces the calculation of the compressor rotor critical speed and unbalance response analysis. Radial unbalanced magnetic pull（UMP） is produced in rotor when the motor is running. UMP impacts the critical speeds of the rotor shaft. The resuh of UMP is obtained by extracting radial magnetic flux density in air gap with finite element method, and critical speeds are also calculated in the influence of UMP. Amount of unbalance of the rotor position for some sensitive degree is calculated. Frequency equation of the hearing-rotor system is solved and the complex frequency is obtained. The logarithmic decrement curve is shown. The stability analysis of the spindle is done.
出处
《机械工程师》
2015年第2期5-7,共3页
Mechanical Engineer
基金
国家自然科学基金资助项目(51175350)
关键词
临界转速
不平衡响应
不平衡磁拉力
稳定性
critical speeds
unbalance response
unbalanced magnetic pull
stability
