轴流式通风机主轴的振动特性分析

Study of Vibration Characteristic of Spindle System in a Axial Flow Fan

采用拉格朗日方程推导轴流式通风机系统的动力学方程,分析了通风机主轴系统的振动特性,计算结果表明:主轴振动与转速、不平衡量和叶轮重力等正相关,与轴承的刚度和阻尼负相关。并根据求得的动力学方程计算出通风机轴承刚度阻尼对系统振动性能的影响。

The kinetic equation of the rotor system in a axial flow fan was derived using Lagrangian equation. The derivation arrive at the conclusion that, the vibration of the spindle system is related to positive damping, correlation; and they er weight and the spindle quality and they have The vibration of the rotor system is also related to the bearing stiffness and have negative correlation. Furthermore. the effect on system vibration which is caused by the stiffness of bearing in the fan is figured out.