【摘要】 首先建立一个基于几何相似、最大剪切应力恒定及胶料黏度相似准则的密炼机几何模拟放大模型.然后以胶料质量相似为设计目标,选择4个几何放大比例因子,以相似准数的形式写出模型与实物的相似条件,根据放大准则和流变理论建立了一个密炼机模拟放大模型.以此相似放大理论作为设计平台,设计一台370L密炼机模型,并与原型机(BB270)和实际机(BB370)进行比较.结果表明:单个参数误差小于10.70%,几何参数群A误差小于8.00%,其设计偏差满足工程设计需要;模型机的混炼质量与原型机相近,达到了密炼机模拟放大的设计目标.更多还原

【Abstract】 A geometric simulation and scaling-up model of mixer is established based on the geometric similarity,the constancy of maximum shear stress and the approximation of compound viscosity.By taking the similarity of compound quality as the design goal,four geometric scaling-up factors are then chosen and the similarity conditions between the model mixer and the actual one are presented in the form of similarity criteria.According to the similarity criteria and the rheology theory,a scaling-up model to simulate the mixer is proposed.Moreover,with the similarity scaling-up theory as a design platform,a model of 370L mixer is designed,which is finally compared with the prototype mixer(BB270) and the practical one(BB370).The results show that the modeled 370L mixer with a single-parameter error of less than 10.7% and a geometric parameter-group A error of less than 8% meets the requirements of engineering design well,and that the mixing quality of the modeled mixer is similar to that of the prototype one.Thus,the similarity scaling-up of mixer is successfully implemented.更多还原