三偏心蝶阀广泛的应用于多种多样的工业，如水量分配、下水道、石油与天然气发电厂等等，而三偏心蝶阀中的蝶板和阀杆的振动在其结构设计和应用中起着重要的作用，且目前关于三偏心蝶阀中蝶板和阀杆的振动特性的研究较少。在蝶阀工作中，若蝶板的固有频率与流过蝶板后产生的卡门涡的脱落频率过于接近，则二者就会产生共振而毁坏三偏心蝶阀甚至影响整台机器正常运行。为了比较三偏心蝶板和阀杆的振动频率与流过蝶板产生的卡门涡的脱落频率的大小，本文运用了ANSYS有限元分析方法结合实验验证的方式计算出三偏心蝶板和阀杆的固有频率，再根据计算卡门涡的脱落频率的经验公式得出流过蝶板后产生的卡门涡的脱落频率，得出二者不发生共振的充分条件，此外，本文也论述了蝶板和阀杆的振动对蝶阀密封性的影响。
Abstract
Tri-eccentric butterfly valves are widely used in various industries, such as, water distribution, sewage, oil and gas plants. Butterfly disc and valve rod vibrations in tri-eccentric butterfly valveis play an important role in their structure design and application. Besides, there are few publications to study vibration characteristics of tri-eccentric butterfly disc and valve rod. If butterfly disc’s natural frequency is closed to Karman vortex’s shedding frequency, a resonance phenomenon occurs to destroy a tri-eccentric butterfly valve, and affect the whole machine’s normal operation. Here, to prevent a resonance phenomenon happening, a butterfly disc and a valve rod’s natural frequencies were calculated under high temperature and high pressure. For this purpose, the finite element software ANSYS and test verification were used. With an emprical formula, Karman vortex shedding frequency was calculated. The sufficient condition for no resonance was obtained. Moreover, the effects of butterfly disc and valve rod vibration on the tightness of a tri-eccentric butterfly valve were presented..
关键词
三偏心蝶阀 /
蝶板和阀杆 /
固有频率 /
卡门涡
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Key words
tri-eccentric butterfly valve /
butterfly disc and valve rod /
natural frequency /
Karman vortex
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参考文献
[1] 任华. 三偏心蝶阀的发展及应用[J]. 内蒙古石油化工, 2008, 34(3):51-51.
REN Hua The development and application of triple eccentric butterfly valve[J].Inner mongolia petrochemical industry,2008, 34(3):51-51
[2] 吴健. 三偏心蝶阀的结构分析与动力学研究[D]. 兰州：兰州理工大学, 2003.
WU Jian Structure analysis and dynamics research of triple eccentric butterfly valve[D].Lanzhou:Theuniversity of lanzhou technology,2003.
[3] 王建华. 三偏心蝶阀蝶板的应力分析[J]. 阀门, 2005(4):19-20.
Wang Jianhua Stress analysis of triple eccentric butterfly valve disc [J].Valve,2007, 35(10):36-40.
[4] 明友. 基于阀门仿真系统的三偏心蝶阀的结构及运动性能分析[D]. 兰州：兰州理工大学, 2006.
MING You. Based on the structure of the simulation system of triple eccentric butterfly valve valve and sport performance analysis[D].Lanzhou:The university of lanzhou technology,2006.
[5] 马剑龙, 汪建文, 董波,等. 风力机风轮振动频率及应力特性试验研究[J]. 排灌机械工程学报, 2013, 31(11):980-986.
MA Jian-long,WANG Jian-wen,TONG Bo,etal. Experimen on vibration frequency and stress characteristics of whell in wind turbine[J].Journal of drainage and irrigation machinery engineering,2013, 31(11):980-986.
[6] 张建民, 王稳祥. 振动频率对饱和砂土动力特性的影响[J]. 岩土工程学报, 1990(1):89-97.
ZHANG Jian-ming,WANG Yin-xiang. The influence of vibration frequency of saturated sandy soil dynamic characteristics[J]. Journal of geotechnical engineering,,1990(1):89-97.
[7] 李建伟, 肖良瑜, 庞立军. 混流式水轮机蝶阀蝶板振动特性研究[J]. 阀门, 2013(6).
LI Jian-wei,XIAO Liang-yu,PANG Li-jun.Study on the Vibration Properties of the Butterfly Valve Disc for Francis Turbine[J].Valve,2013(6).
[8] 刘昌领, 陈建义, 李清平,等. 基于ANSYS的六缸压缩机曲轴模态分析及谐响应分析[J]. 流体机械, 2012, 40(8):17-21.
LIU Chang-ling,CHEN Jian-yi,LI Qing-ping,etal.Six cylinder compressor crankshaft based on ANSYS modal analysis and harmonic response analysi[J].Fluid machiner,2012, 40(8):17-21.
[9] Friswell M I, Mottershead J E. Finite Element Model Updating in Structural Dynamics[J].Dordrecht,Kluwer,1995
[10] 庞立军, 吕桂萍, 钟苏,等. 水轮机固定导叶
涡街模拟与振动分析[J]. 机械工程学报, 2011,
47(22):159-166.PANG Li-jun,LV Gui-ping,ZHONG Su,etal.Vortex Shedding Simulaion and Vibration Analysis of Stay Vanes of Hydraulic Turbine[J] Journal of mechanical engineering, 2011, 47(22):159-166.
[11] 刘春时, 孙伟, 李小彭,等. 数控机床整机振动测试方法研究[J]. 中国工程机械学报, 2009, 7(3):330-335.
LIU Chun-shi,SUN Wei,LI Xiao-peng,etal.Vibration testing method for CNC machines[J].Chin ese journal of construction machinery, 2009, 7(3):330-335.
[12] 官洪儿. 蝶阀与多板阀的内部流场数值模拟及结构静力分析[D]. 沈阳：东北大学, 2010.
GUAN Hong-er.Interior Flow-field Numerica Simulation Static Analysis of Butterfly-vale and Multi-discs Valve[D].Shen yang：Northeastern university,2010 .
[13] 梁贺志. 叶片尾部脱落旋涡频率的计算[J]. 水利电力机械, 2007(12):61-63.
LANG He-zhi.Calculation on the Frequency of Vortex of Stem Come off for The Vane.Water conservancy & electric power machinery,2007(12):61-63.
[14] 闵强利. 低雷诺数卡门涡街数值模拟[J]. 四川兵工学报, 2009, 30(11):81-83.
MIN Qiang-li. Numerical simulation of low Reynolds number karman vortex street[J].Journal of sichuan armaments factories,2009, 30(11):81-83.
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