| Cite this article: | 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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| 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 |
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