Dynamic Analysis And Optimization Of Vertical Roller Mill Grinding Disc

Vertical roller mill is a large equipment which has function of milling seasoning andgrade-transportation. It also has many advantages such as tight structure, small area occupation,low-cost, high efficiency, easy operation,stable mechanical property and so on.Due to thematerial bed theory used in vertical roller mill, it prevent collision and wear between the grindingdisc and grinding roller. So it is obviously better than ball-milling in property of efficiency,energy consumption and low noise.This paper is mainly about dynamical load, impact load and cyclic load born by every workpart of vertical roller mill on the basis of structure and theory of vertical roller mill. Thetraditional design method, static analysis, cannot meet the requirement of vertical roller mill. Sowe should take something into account such as structure, material, intensity and toughness. Andmost important of all, dynamical analysis is essential. Because the structure of vertical roller millis complex and the analytical methods to every part are alike. In this paper, I used the method offinite-element analysis to solve the grinding disc.In this paper, the above analytical results are solved by using ANSYS software. At first, theimportant parts of grinding disc should be simplified. According to many kinds of equipments the3-D model of grind disc is builded up by using PRO/E software. Then educed the model intoANSYS to analyse. And accordingly the application method of corresponding load and boundaryconditions are also discussed in detail. The fatigue characteristic curve, the matrix of damage andthe cloud chart of displacement and stress can be achieved to inspect the safety and rationality ofgrinding disc. The last step is to obtain the dynamical analysis, static analysis, and responseanalysis of model. The vibration models and nature frequencies of grinding disc can be achievedfrom model analysis. Also the resonance response analysis is helpful to obtain range of resonancefrequency and some other specialties of grinding disc at work.At last, in this paper, the optimization module of Goal Driven Optimization is used tooptimize structure. The first step is to use topological method to make sure majorizing region. Soto obtain the parameters of optimization function. The object of optimization is the weight ofgrind disc. The object should be minimizing on the occasion of maintaining effective stress anddisplacement of every part of grinding disc. So the cost and material is reduced and the structureof grinding disc is reasonable.