| 引用本文: | 王彦伟,任岩丛,李育房.高速离心泵叶轮试验模态分析及优化[J].灌溉排水学报,0,():-. |
| WANG Yanwei,REN Yancong,LI Yufang.高速离心泵叶轮试验模态分析及优化[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】为了合理的设计叶轮，分析影响叶轮振动特性的敏感参数。【方法】本文首先采用ANSYS仿真软件对叶轮进行模态分析，得到离心泵叶轮前六阶振型的固有频率；然后使用LMS Test Lab软件对叶轮进行的试验模态分析，将并将二者结果进行对比，证明数值模拟结果的准确性；最后对叶轮前盖板曲率和后盖板曲率的半径这两个敏感参数进行优化设计。【结果】叶轮结构固有频率随叶轮前盖板曲率半径增加而增加，半径从10 mm变换到16 mm时，固有频率增加10%；而增大叶片后盖板曲率半径叶轮固有频率影响很小，半径从20 mm增大到30 mm,固有频率只降低0.18%。【结论】适当增加叶片前盖版曲率半径有利提高离心泵叶轮的振动特性，对离心泵叶轮的设计及模态分析提供一定的参考。 |
| 关键词: 离心泵;叶轮;振动特性;数值模拟;模态分析 |
| DOI： |
| 分类号:TH311 |
| 基金项目:国家自然科学基金(51375186)；湖北省教育厅重点科研项目(D20161506)；湖北省教育厅科学技术研究计划指导性项目(B2021085)；化工装备强化与本质安全湖北省重点实验室开放研究基金资助课题(2021KA03) |
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| Modal analysis and optimization of impeller test of High-speed centrifugal pump |
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WANG Yanwei, REN Yancong, LI Yufang
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Key Laboratory of chemical equipment enhancement and intrinsic safety,Wuhan Institute of Technology
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| Abstract: |
| 【Background】In recent years, one of the main forms of failure encountered by centrifugal pump impellers during operation is fatigue fracture. The reason is that the impeller of the high-speed centrifugal pump often works at an excessively high speed, which will be subject to various prestresses, resulting in severe vibration, causing resonance and fatigue fracture of the impeller.【Objective】In order to reasonably design the impeller and analyze the sensitive parameters affecting the vibration characteristics of the impeller .【Method】an An ANSYS simulation software was first used to analyze the impeller modally, and the natural frequency of the first six-order mode shape of the centrifugal pump impeller was obtained. Then, the impeller is analyzed using the LMS Test Lab software, and the results of the two will be compared to prove the accuracy of the modal test results. Finally, the two sensitive parameters of curvature of front cover plate and radius of curvature of back cover plate of impeller are optimized . 【Result】theThe natural frequency of impeller structure increases with the increase of the radius of the front cover of the impeller, and the natural frequency increases by 10% when the radius is transformed from 10mm to 16mm; The natural frequency of the impeller of the cover arc radius after the blade is enlarged is very small, the radius is increased from 20mm to 30mm, and the natural frequency is only reduced by 0.18%.【Conclusion】Appropriately increasing the radius of curvature of the front cover plate of the blade is conducive to improving the vibration characteristics of the centrifugal pump impeller, and provides a certain reference for the design and modal analysis of the centrifugal pump impeller. |
| Key words: centrifugal pump; impeller; Vibration characteristics; numerical simulations; modal analysis |
