【摘要】 高速永磁电机在接近临界转速时，转子振动振幅明显增大，会导致转子疲劳破坏甚至定子转子之间产生摩擦，在轴承支撑处安装挤压油膜阻尼器可以抑制振动。为此选定某型号高速永磁电机转子，针对该高速永磁电机转子的参数设计挤压油膜阻尼器，依据油膜理论确定了油膜承载长度、油膜半径、间隙、偏心率、滑油黏度等5个挤压油膜阻尼器参数，建立了挤压油膜阻尼器有限元模型，在此基础上分别分析油膜承载长度、油膜半径、间隙、偏心率、滑油黏度5个参数分别对最大油膜压力、油膜反力、油膜阻尼系数、油膜刚度系数的影响，分析最大油膜压力、油膜反力、油膜阻尼系数、油膜刚度系数4个动力学参数的变化趋势并给出选择挤压油膜阻尼器参数的原则，为高速永磁电机上应用挤压油膜阻尼器提供选择的依据。更多还原

【Abstract】 When the high-speed permanent magnet motor is close to the critical speed, the rotor vibration amplitude increases significantly, which will lead to rotor fatigue damage and even friction between the stator and rotor. To this end, a certain type of high-speed permanent magnet motor rotor was selected, the extruded oil film damper was designed according to the parameters of the high-speed permanent magnet motor rotor, and five parameters of the extruded oil film damper, such as oil film bearing length, oil film radius, clearance, eccentricity, and lubricating oil viscosity, were determined according to the oil film theory, and the finite element model of the extruded oil film damper was established. The influence of the oil film stiffness coefficient was analyzed, and the change trend of the four dynamic parameters of the maximum oil film pressure, oil film reaction force, oil film damping coefficient and oil film stiffness coefficient was analyzed, and the principle of selecting the parameters of the extruded oil film damper was given, which provides a basis for selection of the extruded oil film damper applied in high-speed permanent magnet motors.更多还原