单级悬臂泵轴的动态分析与改进设计  

Dynamic Analysis and Improved Design of Single-stage Cantilever Pump Shaft

作　　者：高红斌[1] 卢改林[1] 高琨[1] 程晨[1] 

机构地区：[1]山西大学工程学院,山西太原030013

出　　处：《流体机械》2011年第7期45-49,共5页Fluid Machinery

基　　金：山西省基础研究计划资助项目(200811052)

摘　　要：为解决单级悬臂泵-电机系统的传动轴常会因扭转共振及负载等因素引起的破坏系统的问题,对该轴系的扭振传递模型进行了详细分析,建立了叶轮与电机转子的集中质量力学模型;介绍了扭转方程中参数的确定方法,并推导了叶轮负载系统的转动惯量公式;从理论求解了传动轴的临界转速、确定了轴上的节面和主振型;以输入的单位阶跃信号为例,利用拉普拉斯变换,得出了叶轮与电机转子扭角的动态响应过程,通过与传动轴弹性化改进后的动态响应结果比较,可知弹性轴能够减小和较少泵轴扭断故障的发生。研究结果可以为悬臂泵主轴的改进设计提供理论依据。In order to solve problems of transmission shaft which is a single-stage cantilever pump-motor system and could destory the system such as twist resonance and load,this paper analyzes the shaft torsional transmission model in detail,establishes a mechanical model of concentrated mass of impellers and motor.It introduces simply the method of determining the parameters in the torsional vibration equation,derived moment of inertia of impeller loading system;solved the critical rotating speed of transmission shaft,determined nodal plane and principal vibration mode of the shaft.Take unit step signal for example,describes the dynamic response process of torsional angle of impeller and motor by Laplace transform.Compared with the dynamic response process of elasticized shaft,elastic shaft can decrease damage of pump.The results can provide theoretical basis to design and improve single-stage cantilever pump shaft.

关 键 词：单级悬臂泵 轴 动态分析 改进设计 临界转速 

分 类 号：TH122[机械工程—机械设计及理论]