The Optimization Of Mixing Structure Of Asphalt Mixing Station

Mixing is the most critical processes in the asphalt concrete production process,the design of the mixing device is reasonable or not directly affect the mixing qualityand efficiency of asphalt concrete mixing plant. From the development and trends ofthe asphalt mixing equipment and the research of mixing technology at home andabroad, mixing structure has become a focus of study of modern mixing technology. Asmixing is an extremely complex and dynamic process, determine the best parametersof mixing mechanism and rational matching relations, at the same time, the strength,strain, vibration mode and fatigue failure of mixing structure to meet the designrequirements also is research priorities and difficulties.On the basis of mixing mechanism of twin-shaft compulsory mixing of theexisting4000-type asphalt mixing plant, the paper theoretically study on the ranges ofmain mixing parameters of mixing mechanism, and determine a reasonablecombination Program of the mixing device parameters. It is suggested that thearrangement of mixing arms should be circle flowing, setting angle of mixing bladesshould be45°,the number of mixing blades should be8,phase angle of adjacent mixingarms on single shaft should be90°,the arrangement of mixing arms on double shaftshould be positive and crossed, length-breadth ratio of mixing trough should be1.1.Finally, this thesis use PROE to virtual prototype modeling and assembly ofmixing device, and using ANSYS to finite element analysis of the important parts ofthe mixing device. The results of ANSYS analysis show that mixing shaft stressintensity to meet the design requirements and a large surplus, and fatigue life close tothe rated use life, but mixing arm and blade stress distribution is very uneven, in orderto avoid the waste of materials, this thesis have the structural optimization of themixing arm and blade.