不同固定方式对射水抽气器动特性的影响
谢晋民1,蒋宏春2,李斌3
(1.深能合和电力(河源)有限公司,广东 河源 517025;2.华北电力大学 机械工程系,河北 保定 071003;3.山西晋城供电公司,山西 晋城 048000)
摘要:对电厂用射水抽气器进行了有限元计算,得到了抽气器在七种不同固定方式下的前六阶固有频率与振型,并分析了不同固定方式对于抽气器各阶固有频率及振型变化的影响。分析发现,抽气器的固定方式对其各阶固有频率及振型均有影响,随着各固定方式牢固程度的增加,对应的各阶固有频率数值也随之增加;但每阶振型对应的变形方式与抽气器的固定方式之间并不存在较为固定的对应关系;不论在何种固定方式下,随着阶数的增大,其振型对应的变形状况将变得越为复杂。
关键词:射水抽气器;固定方式;固有频率;振型
中图分类号:TK264.1          文献标识码:A          文章编号:1006-0316 (2013) 03-0041-04
Effect of fixing style on dynamic characteristic of water jet air ejector
XIE Jin-min1,JIANG Hong-chun2,LI Bin3
( 1. ShenNengHeHe Electric Power (Heyuan) Co., Ltd., Heyuan 517025, China; 2. Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China;3. Jincheng Power Supply Company, Jincheng 048000, China )
Abstract:This paper calculates the natural frequencies and the vibration modes of the former six harmonics based on FE analysis. Meanwhile, the effect of the fixing style on the dynamic characteristics of the water jet air ejector is also studied. The result shows that the fixing style will both affect the natural frequencies and the vibration modes. The more tight effects the fixing style has, the larger value the ejector will have for the natural frequency. However, there is not a necessary relation between the vibration mode and the fixing style. No matter what kind of fixing style, as the number of the harmonic increases, the vibration mode will be more complex. 
Key words:water jet air ejector;fixing style;natural frequency;vibration mode
 
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收稿日期:2012-09-10
作者简介:谢晋民(1984-),男,山西阳泉人,学士,助理工程师,主要从事电厂设备运行与检测方面的研究工作。
 

 

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