The Finite Element Analysis And Optimization Design Of Reclaimer Device Of The Helix Stacker-reclaimer Based On Workbench

The helix stacker-reclaimer is a new type of material handling equipment,which is mainly used for transportation of bulk materials.Compared with the bucket wheel stacker-reclaimer widely used in the market,its structure is simple and its operation is flexible.Therefore,it has attracted more and more manufacturers' attention,and has also been used by many users.Reclaimer device is the main working part of the helix stacker-reclaimer,with complex working conditions,poor working environment,greater weight and other characteristics.Its working reliability,stability and safety affects the normal operation of the machine,so the finite element analysis of reclaimer device of the helix stacker-reclaimer is necessary and very important.This paper takes the reclaimer device of the helix stacker-reclaimer as the research object,the static and dynamic analysis of the reclaimer arm was carried out under common feeding conditions,and the optimum design of the leptospira was also obtained.Firstly,according to the production requirements and the actual production and manufacturing situation of a company,the main structure and size of the spiral reclaimer and the belt conveyor of the reclaimer device were designed and calculated.After that,according to the actual structure shape and size of the reclaimer arm,the finite element analysis model of the reclaimer arm was established by using the modeling software of Solidworks and finite element analysis software of Workbench.Secondly,the external load of the reclaimer arm in the reclaiming condition was analyzed,static analysis for the reclaimer arm was carries out,and the strength and rigidity of the reclainmer arm was valided.In order to ensure the accuracy of the results,an independent test and a grid quality assessment for the finite element mesh were carried out.The results show that the maximum stress and deformation are less than the allowable value,the surplus amount is larger and the original design is conservative.Then,the modal analysis of the reclaimer arm was carried out,the natural frequencies and modes of the first eight steps of the reclaimer arm were calculated,and the vibration was also analyzed.On the basis of the modal analysis,the harmonic response analysis was carried out to determine the external excitation frequency of the reclaimer arm which is easy to resonate.The result shows that the dangerous excitation frequency is 30 Hz,which corresponds to the sixth order natural frequency of the reclaimer arm.The current design has effectively avoided this frequency.On the basis of static analysis,the spiral body of the screw feeding mechanism was optimized.Under the conditions of strength and stiffness,the optimum thickness of helical blade is 17.5mm and the diameter of spiral shaft is 250 mm,which is based on the objective function of screw mass.This research work can help to reduces the quality of screw and ensure its reliability and economy.The research ideas and analysis methods of this paper provide reference for the design,analysis and optimization of the related stacker-reclaimer.The use of finite element analysis can guarantee the normal work of the stacker-reclaimer,shorten the R&D cycle and reduce the manufacturing cost.