Improvement And Optimization Of Idler Of Plane Linear Belt Conveyor

Plane belt conveyor is one of the most widely used transportation equipment at present,among which the application fields of large belt conveyor include coal,port,hydropower and so on;Small belt conveyors are used in grain,construction and so on.For a large belt conveyor system,the number of idlers required by the whole system can reach thousands.As an important bearing component of conveyor,idler plays an important role in the stable operation of equipment.Therefore,it is of great significance to analyze the traditional idler structure theoretically and improve and innovate on the basis of it.First of all,this paper briefly expounds the research background and significance of idler,analyzes the processing and selection of idler,and then studies the 108×465mm series idler as follows:1.Three-dimensional modeling and finite element analysis of roller structure are carried out by using software.It is found that the stress and deformation distribution of roller are small on both sides and large in the middle.The maximum stress is located at the center of pipe body,and the stress value is 96.77 MPa and the maximum deformation value is 0.173 mm,which are close to the limit value.Through finite element analysis,it is found that there is stress concentration at the bayonet at both ends of the idler shaft,and two improvement measures are put forward.2.In order to solve the problem of excessive load on the middle part of the idler,the improvement scheme of the idler is put forward: weld a 3mm thick belly plate in the middle of the pipe body,and carry out simulation analysis again.The results show that the maximum stress of the pipe body is reduced to 45.05 MPa and the maximum deformation is reduced to 0.102 mm after welding the belly plate.In order to explore the best welding quantity,2～5 ventral discs were welded at the weak link of the pipe body,and it was found that there was no excessive change in stress and deformation between welding 5 ventral discs and welding 4 ventral discs.After comprehensive consideration,one or three ventral discs were selected as the best quantity.3.Taking the volume as the objective function,an optimization scheme is put forward for the improved idler.By comparing the optimized results,three welded belly plates are selected as the optimal number of belly plates after optimization,which reduces the wall thickness of the idler tube and the bearing seat by 1mm and 0.5mm respectively,and reduces the total volume by13.0%,greatly reducing the quality of the idler.4.The sealing structure of idler is designed.By comparing the material properties of PA66 and PA610 through simulation,the better PA610 is selected as the inner sealing ring material of idler.According to the corrosive environment of the outer sealing ring,polyethylene with high corrosion resistance is selected as the outer sealing ring material.There are 55 figures,16 tables and 56 references in this paper.