一种附带弹性连接管的立式泵有限元动态特性分析
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摘要
针对换热站立式管道泵的振动与噪声污染问题,在考虑连接管弹性影响下,应用ANSYS软件分析了泵体的动态特性。首先简化泵体结构外型,运用Solid Works绘制三维结构图,得到有限元实体模型。然后调用ANSYS中的Block Lanczos算法进行动态分析,得到泵体的固有频率和振型,与现场模态测试分析结果进行了对比。结果表明,泵体计算固有频率与转子旋转频率不重叠,不会出现结构共振;附带弹性连接管后,泵体整体刚度明显下降,使得固有频率降低,为结构减振降噪与优化设计提供参考依据。
For the vibration and noise pollution problems of vertical pump,in considering the influence of the connecting pipe's elastic,ANSYS software was used to analyze the dynamic characteristics of the pump body. At first,the structure of pump body shape was simplified and the three-dimensional structure of vertical pump was drawn by using Solid Works,so it could obtain the finite element analysis model of the machine. Afterwards,the model analysis of the whole machine was completed by Block Lanczos algorithm of ANSYS. As the result of the modal analysis it got the natural frequencies and natural formations. Then it compared the modal test and analysis results. The results showed that calculating natural frequency of pump body did not overlap with the rotor rotating frequency,there would be no structure resonance. With flexible connecting pipe,the integral stiffness of pump body decreased obviously,and the nature frequency was reduced. So it can predict optimization design of the structure and provide reference for reducing vibration and noise.
For the vibration and noise pollution problems of vertical pump,in considering the influence of the connecting pipe's elastic,ANSYS software was used to analyze the dynamic characteristics of the pump body. At first,the structure of pump body shape was simplified and the three-dimensional structure of vertical pump was drawn by using Solid Works,so it could obtain the finite element analysis model of the machine. Afterwards,the model analysis of the whole machine was completed by Block Lanczos algorithm of ANSYS. As the result of the modal analysis it got the natural frequencies and natural formations. Then it compared the modal test and analysis results. The results showed that calculating natural frequency of pump body did not overlap with the rotor rotating frequency,there would be no structure resonance. With flexible connecting pipe,the integral stiffness of pump body decreased obviously,and the nature frequency was reduced. So it can predict optimization design of the structure and provide reference for reducing vibration and noise.
引文
[1]Schmitz,Steve steven.Reducing pump noise in cooling tower applications[J].World Pumps,2004(9):24-29.
[2]蒋爱华,张志谊.离心泵噪声研究的综述和展望[J].振动与冲击,2011,30(2):77-84.(Jiang Ai-hua,Zhang Zhi-yi.Review and outlook of studying on noise of centrifugal pumps[J].Journal of Vibration and Shock,2011,30(2):77-84).
[3]朱华明,周诗海.中小型立式泵机组运行振动问题的探讨[J].排灌机械,2002,20(4):11-14.(Zhu Hua-ming,Zhou Shi-hai.The discussion about running vibration of small and medium-sized vertical pump unit[J].Journal of Drainage and Irrigation Machinery,2002,20(4):11-14).
[4]王孚懋,杨龙.水泵机组浮筏隔振系统研究[J].噪声与振动控制,2008,28(5):36-39.(Wang Fu-mao,Yang Long.Study on raft vibration isolation system for pumping unit[J].Noise and Vibration Control,2008,28(5):36-39.)
[5]M A Langthjem,NOlhoff.Anumericalstudyof flow-induced noise in atwodimensional centrifugal pump[J].Part II.Hydroacoustics.Journal of Fluids and Structures,2004(19):369-386.
[6]王孚懋,刘凯.立式循环泵转子系统动态特性分析[J].机械制造与自动化,2014,43(3):13-16.(Wang Fu-mao,Liu Kai.The dynamic analysis on rotor system of pump[J].Machine Building&Automation,2014,43(3):13-16.)
[7]张俊俊,王基生.混凝土泵车臂架刚柔耦合动力学分析[J].机械设计与制造,2014(8):62-64.(Zhang Jun-jun,Wang Ji-sheng.Rigid-flexible coupling dynamic analysis on concrete pump truck boom[J].Machinery Design&Manufacture,2014(8):62-64.)
[8]陈艳锋,吴新跃,王基.船用泵振动模态计算分析研究[J].机电产品开发与创新,2005,18(2):60-62.(Chen Yan-feng,Wu Xin-yue,Wang Ji.The analysis and study of Marine pump vibration modal calculation[J].Development&Innovation of Machinery&Electrical Products,2005,18(2):60-62.)
[9]司录荣,魏秀业.基于Pro/E和ANSYS的轴向柱塞泵壳体的有限元模态分析[J].矿山机械,2013,41(10):51-54.(Si Lu-rong,Wei Xiu-ye.Finite element modal analysis on shell of axial plunger pump based on Pro/E and ANSYS[J].Mining&Processing Equipment,2013,41(10):51-54.)
[10]王孚懋,郭晓斌.罗茨鼓风机模态综合法动态特性分析[J].山东科技大学学报,2010,29(2):63-67.(Wang Fu-mao,Guo Xiao-bin.Dynamic performance analysis of roots blower with modal synthesis method[J].Journal of Shandong University of Science and Technology,2010,29(2):63-67.)
[2]蒋爱华,张志谊.离心泵噪声研究的综述和展望[J].振动与冲击,2011,30(2):77-84.(Jiang Ai-hua,Zhang Zhi-yi.Review and outlook of studying on noise of centrifugal pumps[J].Journal of Vibration and Shock,2011,30(2):77-84).
[3]朱华明,周诗海.中小型立式泵机组运行振动问题的探讨[J].排灌机械,2002,20(4):11-14.(Zhu Hua-ming,Zhou Shi-hai.The discussion about running vibration of small and medium-sized vertical pump unit[J].Journal of Drainage and Irrigation Machinery,2002,20(4):11-14).
[4]王孚懋,杨龙.水泵机组浮筏隔振系统研究[J].噪声与振动控制,2008,28(5):36-39.(Wang Fu-mao,Yang Long.Study on raft vibration isolation system for pumping unit[J].Noise and Vibration Control,2008,28(5):36-39.)
[5]M A Langthjem,NOlhoff.Anumericalstudyof flow-induced noise in atwodimensional centrifugal pump[J].Part II.Hydroacoustics.Journal of Fluids and Structures,2004(19):369-386.
[6]王孚懋,刘凯.立式循环泵转子系统动态特性分析[J].机械制造与自动化,2014,43(3):13-16.(Wang Fu-mao,Liu Kai.The dynamic analysis on rotor system of pump[J].Machine Building&Automation,2014,43(3):13-16.)
[7]张俊俊,王基生.混凝土泵车臂架刚柔耦合动力学分析[J].机械设计与制造,2014(8):62-64.(Zhang Jun-jun,Wang Ji-sheng.Rigid-flexible coupling dynamic analysis on concrete pump truck boom[J].Machinery Design&Manufacture,2014(8):62-64.)
[8]陈艳锋,吴新跃,王基.船用泵振动模态计算分析研究[J].机电产品开发与创新,2005,18(2):60-62.(Chen Yan-feng,Wu Xin-yue,Wang Ji.The analysis and study of Marine pump vibration modal calculation[J].Development&Innovation of Machinery&Electrical Products,2005,18(2):60-62.)
[9]司录荣,魏秀业.基于Pro/E和ANSYS的轴向柱塞泵壳体的有限元模态分析[J].矿山机械,2013,41(10):51-54.(Si Lu-rong,Wei Xiu-ye.Finite element modal analysis on shell of axial plunger pump based on Pro/E and ANSYS[J].Mining&Processing Equipment,2013,41(10):51-54.)
[10]王孚懋,郭晓斌.罗茨鼓风机模态综合法动态特性分析[J].山东科技大学学报,2010,29(2):63-67.(Wang Fu-mao,Guo Xiao-bin.Dynamic performance analysis of roots blower with modal synthesis method[J].Journal of Shandong University of Science and Technology,2010,29(2):63-67.)