针对DN1500三偏心金属硬密封蝶阀在多物理场耦合下阀板和阀杆的应力变形及振动的复杂情况，采用ANSYS数值模拟技术与传统经验公式相结合的方法分析其在不同开度下的流固耦合特性与共振特性。研究结果表明，阀门位于不同开度时，阀内的流动状况不一样，开度越小，流动状况越紊乱，随着开度的增大，流动状况相对稳定。当阀门位于30％开度和50％开度时，阀板和阀杆容易发生共振；当阀门位于75％开度时，阀板和阀杆的应力变形最大。研究结果对于大口径三偏心金属硬密封蝶阀的运行及安全起到了重要作用，同时也对后续结构的优化，避免发生共振具有一定的指导意义。
Abstract
Aiming at complex situation of stress, deformation and vibration of valve plate and valve stem of DN 1500 triple eccentric metal hard seal butterfly valve under multi-physical field coupling, the valve’s fluid-structure interaction characteristics and resonance characteristics under different opening degrees were analyzed by combining ANSYS numerical simulation technique with the traditional empirical formula.The results showed that when the valve is at different opening degrees, flow condition inside the valve is different; the smaller the opening degree, the more disorder the flow condition; with increase in opening degree, the flow condition is relatively stable; when the valve is at 30% opening and 50% opening, valve plate and valve stem are easy to have resonance; when the valve is at 75% opening, stress and deformation of valve plate and valve stem are the maximum; the study results play an important role in operation and safety of large diameter triple eccentric metal hard seal butterfly valve, and also have a certain guiding significance for subsequent structure optimization and avoiding resonance.
关键词
三偏心金属硬密封蝶阀 /
大口径 /
流固耦合 /
应力变形 /
共振特性
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Key words
triple eccentric metal hard seal butterfly valve /
large diameter /
fluid-structure interaction /
stress deformation /
resonance characteristics
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