Study On Design Optimization Of Sealing Surface Of Triple Eccentric Butterfly Valve Based On Digital Twin Technology

Because of its compact structure,butterfly valve is widely used in large diameter pipeline flow control in water conservancy and hydropower projects.The butterfly valve is also developed from the original center line butterfly valve to the triple eccentric butterfly valve and the quadruple eccentric butterfly valve.The increase in the number of eccentric butterfly valve makes the opening and closing process of the seal pair become complicated.The traditional interference inspection method has been difficult to meet the current research and design of eccentric butterfly valve.With the promotion of digital twin technology in the field of intelligent manufacturing,a series of achievements have been made in mechanical equipment design,but the valve industry,especially the triple eccentric butterfly valve based on digital twin technology is not deep enough.The triple eccentric butterfly valve is the most widely used valve pipeline components in various fields,the use of digital twin technology for the triple eccentric butterfly valve in-depth research is of great significance to the valve industry to standardization,intelligent transformation.The main research contents of this paper are as follows:(1)Development of the parameter calculation software of the triple eccentric butterfly valve: Based on the structure of the triple eccentric butterfly valve,the digital relationship between the components of the triple eccentric butterfly valve is sorted out.With Visual Studio 2022 as the development platform and C# as the development language,the secondary development and design of Solid Works are carried out to obtain the digital design software of the triple eccentric butterfly valve with intuitive human-computer interaction interface.It can quickly carry out digital drive,generate the required size specifications of the triple eccentric butterfly valve parts threedimensional models and overall assembly models.(2)Motion simulation test of the triple eccentric butterfly valve: Use Solid Works Motion to simulate the triple eccentric butterfly valve,verify whether there are interference collision and other structural problems in the actual opening and closing process of the triple eccentric butterfly valve model,analyze the influence of different structural parameters of the triple eccentric butterfly valve on the maximum interference,interference starting Angle,etc.,so as to provide a theoretical basis for the value of the triple eccentric butterfly valve seal structural parameters.(3)The triple eccentric butterfly valve sealing performance analysis: Solid Works Simulation is used to conduct thermal-solid coupling finite element stress analysis of the sealing surface of the triple eccentric butterfly valve.Through the sealing performance testing,displacement analysis and strain analysis of the sealing parts of the triple eccentric butterfly valve under normal and high temperature conditions,the stress and sealing performance factors of the triple eccentric butterfly valve seal ring are explored.(4)Structure optimization of sealing surface of the triple eccentric butterfly valve:Through theoretical derivation and numerical simulation,the optimization and development process of three sealing pairs of butterfly valve is analyzed,and the existing defects of the triple eccentric butterfly valve under high temperature conditions are summarized,and reasonable optimization suggestions are put forward.According to the interference and stress distribution of the triple eccentric butterfly valve with different structural parameters,an approximate model was established by using BP neural network,and then NSGA-Ⅱ genetic algorithm was used to optimize the sealing surface parameters.A set of Pareto optimal frontier solutions satisfying the optimization requirements were obtained.Through the approximate model and simulation test,the sealing performance and the uniformity of contact pressure distribution of the optimized triple eccentric butterfly valve ring have been greatly improved.