混流式水轮机蝶阀蝶板振动特性研究  

Study on the Vibration Properties of the Butterfly Valve Disc for Francis Turbine

作　　者：李建伟[1] 肖良瑜[1] 庞立军[1] 

机构地区：[1]哈尔滨大电机研究所水电设备国家重点实验室,黑龙江哈尔滨150040

出　　处：《阀门》2013年第6期15-17,共3页VALVE MAGAZINE

基　　金：国家科技支撑计划;2012BAF12B16-1

摘　　要：针对电站水轮机蝶阀的加强筋板开裂问题,提出了筋板补强方案,利用ANSYS有限元软件,分别对补强前后蝶板结构的振动特性进行了计算和比较。研究结果显示,补强后蝶板结构的各阶固有频率值有了不同程度的提高,而蝶板结构的振型在第4阶后也出现了较大差异的变化,然而这并不能避免卡门涡的出现。通过对蝶板修型,大幅度的提高了蝶板结构的卡门涡频,以此可以避免卡门涡的产生。For the butterfly valve cracking, someone proposed scheme of reinforcing rib-plate. Based on the finite element software ANSYS, the vibration properties of the disc were calculated and compared. The results showed that the natural frequencies of the disc structure increased in different extent and the mode of vibration changed at the fourth order. While, the reinforced structure could not avoid the Kar- man vortices. Further, modification project of outlet edge was proposed. The Frequency of Karman vor- tices was increased drastically. The modified structure can avoid the Karman vortices＇occurrence.

关 键 词：蝶阀 裂纹 卡门涡 修型 

分 类 号：TH134[机械工程—机械制造及自动化]