超细气流分级机高速转子系统固有频率的计算  

Computation of natural frequency of high speed rotor system of superfine air classifier

作　　者：侯志强[1] 侯书军[1] 彭伟[2] 赵月静[2] 

机构地区：[1]河北工业大学机械工程学院,天津300130 [2]河北科技大学机械电子与工程学院

出　　处：《矿山机械》2010年第23期95-98,共4页Mining & Processing Equipment

摘　　要：欲减小超细气流分级机的分级粒径,就必须提高转子系统的转速,目前转子转速已经达到4500r/min左右。由于转子系统主轴较长、转速较高,所以应对其进行动力学设计,使其转动频率远离其固有频率,以便提高转子系统的稳定性。除此之外,还必须提高转子系统的加工精度,对其进行严格的动平衡试验。只有这样才能使转子在受到一定的非均匀磨损之后,整个转子系统仍能处于稳定的状态。笔者在对转子系统进行适当的简化之后,对其各阶固有频率进行了计算,并根据计算结果确定了转子系统的最高工作频率。In order to reduce the classification diameter of the particles in the superfine air classifier,the rotary speed of the rotor should be greatly increased. So far its rotary speed has reached about 4 500 r/min. Since the main axis of the rotor system is very long and its rotary speed is very high,the dynamical design of the rotor system should be carried out. A perfect dynamical design can make the rotary frequency of the rotor far from its natural frequency,which can greatly enhance the stability of the rotor system. Furthermore,the machining precision of the rotor system should be improved and the strict dynamical balance experiment should be carried out on the rotor system. Only by this way can the rotor system be guaranteed stable after it is lopsided frayed. In the paper,each order of the natural frequency of the rotor system was computed after properly simplifying the rotor system and the maximum rotary frequency of the rotor system was obtained according to the computed results.

关 键 词：超细气流分级机 固有频率 瑞雷法 

分 类 号：TH113.1[机械工程—机械设计及理论]