基于流固耦合方法的大口径蝶阀的防振优化设计  

Vibration prevention optimization design of large diameter butterfly valve based on fluid-solid coupling method

作　　者：张伟政[1] 庞益祥 赵鹏博 张俊涛 ZHANG Weizheng;PANG Yixiang;ZHAO Pengbo;ZHANG Juntao(School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《流体机械》2022年第11期96-104,共9页Fluid Machinery

基　　金：甘肃省自然科学基金项目(18JR3RA145)。

摘　　要：针对DN1500三偏心金属硬密封蝶阀在30%和50%开度下蝶板和阀杆会发生应力变形及共振的状况,提出改变蝶板背部弯曲角度的方法,降低蝶板在不同开度下的应力、变形以及共振幅值,从而达到避免发生共振的目的。通过对比优化前后蝶板和阀杆的应力、变形和共振状况,分析优化的可行性,研究结果表明:改变蝶板背部的弯曲角度能够使阀内流体的流动状态更快地趋于稳定,并且能够有效地减小结构的应力和变形;优化后阀门在30%和50%开度下的共振幅值由0.16 mm和0.2 mm减小为0.02 mm和0.04 mm,极大地降低阀门在30%和50%开度下的共振幅值,有效地减少共振对于阀门的损伤,对于阀门的安全运行以及阀门的防共振设计具有一定的参考价值。In view of the stress deformation and resonance of the disc and stem of DN1500 tri-eccentric metal hard seal butterfly valve at 30% and 50% opening degrees, the method of changing the bending angle of the back of the disc was proposed to reduce the stress, deformation and resonance amplitude of the disc at different opening degrees so as to avoid the resonance. The feasibility of the optimization was analyzed by comparing the stress, deformation and resonance conditions of the valve disc and stem before and after the optimization. The research results show that changing the bending angle of the back of the disc can make the fluid flow in the valve more quickly tend to be stable, and can effectively reduce the stress and deformation of the structure;At the same time, the optimized valve can greatly reduce the resonance amplitude value of the valve from 0.16 mm and 0.2 mm to 0.02 mm and 0.04 mm respectively at 30% and 50% opening, and effectively reduce the damage to the valve caused by resonance. It has a certain reference value for the safe operation of the valve and the anti-resonance design of the valve.

关 键 词：三偏心蝶阀 大口径 流固耦合 共振特性 应力变形 

分 类 号：TH134[机械工程—机械制造及自动化]