Parametric Modeling And Fluid-solid Coupling Analysis Of Intermeshing Counter-rotating Twin Screw Extruders

Because twin screw extruder has some specific processing advantages,it has been widely used in industrial polymer production.Twin screw is not only the most crucial part of an extruder,but also a key factor affects the quality and quantity of extrusion product.Due to the complexity in twin screw working condition during the working process,structure characteristics of actual situation of fluid-solid coupling analysis of the screw have some practical guiding significance in actual design and production.Due to the difficulty in intermeshing counter-rotating twin screw modeling,UG/Open further-development gadgets,such as UG/Open MenuScript,UG/Open GRIP are used to establish the parametric design system of a twin screw extruder according to the profile curves of the twin screw.Based on the motion principles of intermeshing counter-rotating twin screw,the profile curve formula is derived.A procedural application is developed to improve the modeling efficiency and quality.By changing the main structure parameters of the screw,the model can be created immediately.In order to study the performance under different work conditions of twin screw extruders,based on the theory of Computational Fluid Dynamics,finite element method(fem)was applied to do the research of isothermal and steady state incompressible viscous non-Newtonian Power-Law fluid simulation.From the result of distribution of flow rate,pressure,velocity of flow field,characteristics of flow field is analyzed and some conclusions are drawn.Fluid analysis results is loaded onto the static structure of the twin screw model.A one-way fluid-solid coupling simulation is completed.By analyzing the differences between strain,stress,deformation and other parameters of twin screw under different working conditions to study the compact of fluid field load.