Optimization Design Of Vibration Agitator For Cement Stabilized Soil And Simulation Research

As a semi-rigid base,cement stabilized soil is widely used in expressway asphalt concrete pavement base.The core device of the cement stabilized soil plant is the agitator,which directly affects the quality of the stabilized soil base.At present,Plant equipment of most cement stabilized soil in China adopts continuous double horizontal shaft forced mixer,there are still problems of low mixing efficiency and uneven mixing in a certain extent.To solve this problem,this paper is to optimize the original agitator,study a new type of double horizontal shaft vibrating mixer,and improve the quality and efficiency of stirring mixing operation.In this paper,the structure and working principle of the continuous stirrer are first discussed,and the vibration stirring process of the double horizontal shaft and its influencing factors are analyzed theoretically.Secondly,with the goal of productivity of 600t/h,the overall structure of the vibration agitator,the transmission system and the vibration system scheme are designed.Taking the minimum surface area of the agitator as the objective function,the main structural parameters are optimized by using the MATLAB optimization toolbox,and the main motion parameters are determined through calculation.By adopting the arranged arrangement with the phase angles of the long and short mixing arms arranged at an interval of 45°,the aim is to solve the problem of stirring low efficiency zone,so as to improve the uniformity of mixing.The 3D solid modeling and assembly of the main components are carried out by SolidWorks software,and static and dynamic interference analysis is carried out for the assembly.Again,the static analysis and modal analysis of the agitator are carried out by Ansys Workbench software,and the rationality of the mechanism design is verified.Finally,based on the EDEM discrete element method,the simulation of the mixing process of stabilized soil mixture has been carried out from two aspects of non-vibration and vibration.At the same time,two different amplitudes are selected for simulation in vibration mixing simulation,the effects of different amplitudes on material movement and stirring characteristics were studied.By comparing and analyzing the results of several groups of simulation,it is concluded that the vibration is beneficial to speed up the axial movement of the material and promote the mixing of materials so as to improve the uniformity of mixing and the efficiency of mixing.By comparing the vibration and mixing effects of vibration under different amplitudes,it is concluded that the vibration agitation with 2mm amplitude is more conducive to improving the uniformity of stirring.