Analysis Of Transverse Stiffness Characteristics And Research On Contact Force Of Conveyor Belt Of Pipe Belt Conveyor

The pipe belt conveyor has the advantages of sealed transportation and space turning,which is in line with the general trend of green environmental protection.In recent years,it has been vigorously promoted and developed.At present,the requirements of logistics transportation system are nothing but high efficiency and energy saving.In order to achieve high efficiency and energy saving,the transverse stiffness and contact force of the conveyor belt must be solved.In the operation of the pipe belt conveyor,the transverse rigidity of the conveyor belt is too small,which will cause tube collapse,material leakage and other phenomena;When the transverse stiffness of the conveyor belt is too large,warping and tube expansion will occur,resulting in the increase of contact force,thus increasing the energy consumption of the conveyor.Therefore,it is crucial to clarify the transverse stiffness characteristics of the conveyor belt and the related influencing factors of the contact force to reduce the energy loss of the conveyor for further development of the pipe belt conveyor.The main research contents of this paper are as follows:First,through the conveyor belt bounce test,the conveyor belt bounce at six points was obtained.The conveyor belt shell model is established,and the contact force of the conveyor belt at six points is obtained by simulation.The test results and simulation results are analyzed and compared,and the effective simulation parameters of the conveyor belt are checked.Second,the linear finite element model of conveyor belt and idler set was established.Firstly,the relationship between transverse stiffness and contact force was analyzed to obtain the contact force and forming force at six idlers with different transverse stiffness;secondly,through the secondary development of the subroutine,based on field variables,the correlation between E₂（transverse elastic modulus of conveyor belt materials）and x coordinate is established,and the contact force between conveyor belt and idler sets with non-uniform transverse stiffness was simulated,and the contact force error of conveyor belt was analyzed when uniform E₂ value and non-uniform E₂ value were obtained;finally,through the linear finite element simulation test of three idlers,the influence factors of conveyor belt warping phenomenon were qualitative analysis,and the functional relationship between warping amount and tension,transverse stiffness and idler spacing was respectively obtained.Third,the finite element simulation model of concave arc of conveyor belt and idlers was established,and the contact between conveyor belt and idlers under different tension,different E₂ values and different concave arc radius was analyzed,and the distribution and change rules of the contact force of conveyor belt under different tension and E₂ values in idlers were obtained,the maximum stress value of conveyor belt under different concave arc radius and its variation rule are obtained.Fourth,firstly,the analytical results of the influence of material weight on the contact force are obtained by the method of microelement;secondly,the ABAQUS discrete element and finite element coupling simulation model was established to carry out coupling simulation analysis on the bearing section,and the contact force simulation results considering the material factors were obtained,and compared with the analytical results;finally,for the bearing section,the influence of material weight and transverse stiffness on the contact force was studied separately.