排灌机械工程学报
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排灌机械工程学报  2016, Vol. 34 Issue (6): 477-482    DOI: 10.3969/j.issn.1674-8530.15.0153
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预应力下矿用抢险排水泵转子部件湿模态计算
曹卫东, 刘冰, 张忆宁, 刘光辉
江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013
Numerical simulation on modal of mine emergency drainage multistage pump rotor
CAO Weidong, LIU Bing, ZHANG Yining, LIU Guanghui
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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摘要 为计算多级泵运行过程中转子部件的模态特征,以某多级矿用抢险排水泵为研究对象,分别建立流场模型和转子部件模型,重点基于流固耦合技术,在ANSYS WORKBENCH平台上计算流场预应力下的转子湿模态.此外,还分别计算了无预应力下的湿模态和不同转速下的干模态,得到了不同情况下的模态分布,分析了造成模态分布差别的原因.结果表明:真空中,转子转速发生改变时,其相应固有频率有一定程度变化;在流体介质中,转子各阶临界转速较真空中均有不同程度的降低;而预应力对于转子动力特性有较大影响,预应力下转子的固有频率有较大幅度上升;其次,随着阶次升高,预应力下湿模态的变形量逐渐超过干模态,两者振型亦存在差异,流场介质的阻尼同样是影响转子动力特性的又一重要因素.转子部件的湿模态计算对合理的结构设计和转速的选取具有重要的指导意义.
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曹卫东
刘冰
张忆宁
刘光辉
关键词多级泵   转子   流固耦合   模态     
Abstract: To obtain the modal characteristic of multistage pump rotor in operation, the three-dimensional flow passage and the structure of the rotor for one mine emergency drainage multistage pump were established, then, based on the method of fluid-solid coupling, a model of the rotor which contains impellers and shaft was simulated with ANSYS WORKBENCH software considering the influence of both the damping and pre-stress from fluid especially. In addition, the modal of rotor was simulated without pre-stress and with different speed of revolution respectively, the characteristics of modal under different situations were obtained, and the reason for different profiles of modal was analyzed.Results show that pre-stress in the pump has a significant influence on the modal of rotor, then, the damping from fluidy has a great effect on that as well. Calculation for the modal of rotor can contribute significantly to reasonable design of multistage pump and determination of revolution.
Key wordsmultistage pump   rotor   coupled fluid-structure   modal   
收稿日期: 2015-07-06;
通讯作者: 刘冰(1988—),男,江苏徐州人,硕士研究生(758475689@qq.com),主要从事流体机械内部流动研究.   
作者简介: 曹卫东(1972—),男,江苏南通人,副研究员,博士(cwd@ujs.edu.cn),主要从事流体机械水动力学工程资助研究.
引用本文:   
曹卫东,刘冰,张忆宁等. 预应力下矿用抢险排水泵转子部件湿模态计算[J]. 排灌机械工程学报, 2016, 34(6): 477-482.
CAO Wei-Dong,LIU Bing,ZHANG Yi-Ning et al. Numerical simulation on modal of mine emergency drainage multistage pump rotor[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(6): 477-482.
 
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