双向轴流泵流固耦合动力特性分析

发布时间：2018-03-22 02:02

本文选题：双向轴流泵　切入点：湿模态分析　出处：《中国农村水利水电》2017年05期 　论文类型：期刊论文

【摘要】：轴流泵作为低扬程泵装置的核心部件广泛应用于沿江沿海地区,其稳定性直接影响到整个泵装置的安全运行。因此,需要对轴流泵进行动力学特性分析保证泵装置的稳定运行。双向轴流泵作为一种新型轴流泵,兼顾排水与灌溉功能,采用双向叶轮。由于结构的特殊性,导致双向轴流泵动力特性有别于一般情况,需要对其进行详细研究。模态分析是一种动力学特性分析的方法,可以有效确定转子的固有频率与振型,防止共振的产生。采用WORKBENCH和APDL命令流耦合的方法对双向轴流泵进行湿模态分析。结果表明:预应力对转子固有频率影响较小;各模态阶数下的湿模态固有频率均低于干模态固有频率;在某些模态阶数下,叶轮叶片数,叶轮轮毂直径与材料属性对转子固有频率有明显影响。研究结果可以为双向轴流泵的结构优化设计与动力学分析提供一定的参考。
[Abstract]:Axial flow pump, as the core component of low head pump device, is widely used in coastal areas along the Yangtze River. Its stability directly affects the safe operation of the whole pump device. It is necessary to analyze the dynamic characteristics of the axial flow pump to ensure the stable operation of the pump device. As a new type of axial flow pump, the bidirectional axial flow pump takes account of the drainage and irrigation functions, and adopts the bidirectional impeller. As a result, the dynamic characteristics of biaxial flow pumps are different from those of general conditions, which need to be studied in detail. Modal analysis is a method of dynamic characteristic analysis, which can effectively determine the natural frequency and mode shape of the rotor. The method of coupling WORKBENCH and APDL command flow is used to analyze the wet mode of bidirectional axial flow pump. The results show that the prestress has little effect on the natural frequency of rotor. The natural frequency of wet mode is lower than that of dry mode at each modal order, and the blade number of impeller is lower than that of dry mode under certain modal order. The impeller hub diameter and material properties have obvious influence on the natural frequency of rotor. The results can provide some references for the structural optimization design and dynamic analysis of the bidirectional axial flow pump.
【作者单位】：江苏省太湖治理工程建设管理局;江苏大学国家水泵及系统工程技术研究中心;
【基金】：国家科技支撑项目(2015BAD20B01) 国家自然科学基金项目(51409123) 江苏省自然科学基金青年基金项目(BK20140554)
【分类号】：TH312

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