超低温蝶阀密封机构的有限元分析

分析了双偏心超低温金属-非金属密封副蝶阀在低温下的应力状态,阀座密封宽度对密封副的结构应力和密封性能均有很大的影响。随着密封宽度的增大,密封副所受接触应力增大,有助于提高其密封性能,但随之也带来了摩擦应力的增大,使密封圈的使用寿命降低。因此,在密封副设计时,应综合考虑这两个因素的影响来优化结构参数。

Finite Element Analysis of Sealing Structure of Cryogenic Butterfly Valve

A kind of cryogenic butterfly valve with the double eccentric structure which possesses the metal - nonmetal sealing pair was put forward, and stress analysis of the sealing pair of the valve at low temperature was implemented by means of finite element simulation based on ANSYS software. The re- sults show that both the structure stress and the sealing property of the sealing pair are greatly influenced by the sealing width of the valve. The contact stress of the sealing pair increases with the increase in the sealing width, which contributes to increasing the sealing property. However, the rising of friction stress is also followed, which decreases the service life of sealing ring. Therefore, in the design process of the sealing pair .overall consideration on both the factors should be taken in order to optimize the structure parameters.