基于流固耦合的膜塞阀多目标优化设计

Multi-objective optimization design of diaphragm plug valve based on fluid-solid coupling

膜塞阀由于结构简单、流通性强和检漏及时等优点被广泛应用于电解液灌装系统中,膜片的受力情况影响着膜塞阀和灌装系统的可靠性。文中基于有限元法和双向流固耦合方法,对膜塞阀开启过程膜片的受力特点进行了可视化数值研究,以膜片的质量和等效应力为目标进行了多目标优化。研究结果表明:膜片在开启过程中受到的等效应力与开度成线性关系,在最大开度应力达到32.73 MPa,膜片失效的主要因素是膜片开启过程中机械拉伸引起的,膜片经过优化后最大等效应力减小了17.5%,质量减小了7.4%,在保证使用寿命的情况下实现了轻量化。研究结果可为电解液灌装阀的优化提供数据参考。

Diaphragm plug valve is widely used in electrolyte filling system due to the advantages of simple structure,strong circulation and timely leakage detection,etc.The fatigue characteristics of the diaphragm during the opening process affect the life and reliability of the diaphragm plug valve and the filling system.Based on the finite element method and bidirectional fluid-solid coupling method,the force characteristics of the diaphragm during the opening process of the diaphragm plug valve were visualized and numerically investigated,and multi-objective optimization was carried out with the mass and equivalent force of the diaphragm as the objectives.The results show that the equivalent force on the diaphragm in the opening process is linearly related to the degree of opening,and the stress reaches a peak value of 32.73 MPa in the maximum degree of opening.The main factor of diaphragm failure is caused by mechanical stretching in the process of opening the diaphragm.The diaphragm is optimized to reduce the maximum equivalent force by 17.5%,and the mass by 7.4%,which realizes light weighting under the circumstance of guaranteeing the service life.The results can provide methodological reference for the optimization of electrolyte filling valve.