| 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,2023,42(8):73-79. |
| 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,2023,42(8):73-79. |
|
| 摘要: |
| 【目的】研究不同前、后盖板曲率半径对高速离心泵叶轮固有频率的影响，为叶轮的合理设计提供科学依据。【方法】采用数值模拟方法，首先得到叶轮前6阶固有频率，其次对3种不同前、后盖板曲率半径的叶轮进行模态分析，得到叶轮前6阶模态频率。【结果】叶轮前6阶固有频率随叶轮前盖板曲率半径增加而增加，半径从10 mm增大到14 mm时，第4阶固有频率变化最大，固有频率增加10%；增大叶轮后盖板曲率半径对叶轮固有频率影响很小，半径从20 mm增大到30 mm时，固有频率降低0.18%。【结论】适当的增加叶轮前盖板曲率半径有利于提高离心泵叶轮的模态频率，提高其动态特性。 |
| 关键词: 离心泵；叶轮；振动特性；数值模拟；模态分析 |
| DOI：10.13522/j.cnki.ggps.2022386 |
| 分类号: |
| 基金项目: |
|
| Experimental Study and Optimization of the Impeller in High-speed Centrifugal Pump |
|
WANG Yanwei, REN Yancong, LI Yufang
|
|
Key Laboratory of Chemical Equipment Enhancement and Intrinsic Safety, Wuhan Institute of Technology, Wuhan 430205, China
|
| Abstract: |
| 【Background and Objective】Fatigue fracture has become a major cause of failure in centrifugal pump impellers due to their operation at high speeds. Excessive speed leads to various prestresses, resulting in severe vibrations, resonance, and ultimately fatigue fracture of the impeller. This study aims to investigate the influence of different curvature radii of the front and rear covers on the natural frequency of high-speed centrifugal pump impellers. The findings provide a scientific basis for the optimal design of the impellers.【Method】The numerical simulation method is employed to determine the natural frequencies of the first six orders of the impeller. Modal analysis is then performed on impellers with varying curvature radii of the front and rear cover plates. A comparison chart of the modal frequencies of the first six orders is generated.【Result】The natural frequency of the impeller increases with an increase in the radius of curvature of the front cover. Specifically, when the radius increases from 10 mm to 14 mm, the natural frequency of the fourth order experiences the most significant change, increasing by 10%. On the other hand, increasing the radius of curvature of the rear cover has minimal effect on the impeller’s natural frequency, with a decrease of only 0.18% observed when the radius increases from 20 mm to 30 mm.【Conclusion】Increasing the radius of curvature of the front cover of the impeller can effectively raise the modal frequency of the centrifugal pump impeller and improve its dynamic characteristics. |
| Key words: centrifugal pump; impeller; vibration characteristics; numerical simulations; modal analysis |
