Optimization Design And Simulation Study Of Conveyor Chain Transmission System For Bucket Elevator

Bucket elevator is a kind of automatic lifting equipment for transporting all kinds of scattered materials and various pieces of material.Usually,the material is conveyed vertically,and some special types of hoist can also transfer the material.The material is automatically entered into the hopper in the floor of the hoist.The hopper arrives at the top of the hoist under the traction device.After the head sprocket,the material is transported to the top receiving device through the head sprocket,and the material is conveyed.The bucket elevator is widely used in the fields of chemical material,refractory material,metallurgy,food industry,cement and so on.The core of bucket elevator is the conveyor chain drive system,the transmission chain drive system includes the head shaft,tail shaft,conveyor chain,hopper,head wheel and tail wheel.In this paper,the optimization design and simulation study of the transmission chain transmission system of the plate chain bucket elevator with model NSE600 are carried out,and the modern optimal design theory is applied to the design of the conveyor chain transmission system.This paper introduces the selection method of the unloading mode of bucket elevator,establishes the mathematical model of material unloading,analyzes the force situation of the particles in material throwing,establishes the motion equation in the process of throwing material,and expounds the method of determining the trajectory curve of the throwing material.The dynamic equation of the conveyor chain system is set up,the design process of bucket elevator is expounded,the design steps of the bucket elevator are introduced.First,the calculation of the lifting capacity is carried out,the bucket volume and the hopper distance are preliminarily determined,the size of the chain wheel and the chain is determined,the maximum pulling force of the chain is calculated,the required motor power is obtained,and the suitable motor is selected for the first choice.Then we design and calculate the components of bucket elevator,and then complete the design of the whole equipment.This paper optimizes the design of the bucket chain conveyor transmission system components,and reduces the quality of the parts without reducing the strength of the parts.The optimized solution of the part size parameters is obtained.Three-dimensional modeling of the optimized parts and structural static analysis to meet the design requirementsThe EDEM simulation software was used to simulate the process of the middle throwing in the conveyor chain system.The curve of the material’s velocity with time,the interaction between the material and the material,and the material and the hopper were obtained.The dynamics simulation of the conveyor chain system was carried out using Recurdyn software.The curve of the chain’s jitter,the chain-sprocket’s meshing impact force and the chain tension with time under different weight loads were obtained.On the basis of dynamic simulation,the statics analysis of the optimized parts is carried out.The total deformation,the equivalent elastic strain and the distribution law of the equivalent stress are obtained.The optimized parts are checked to meet the design requirements.The modal analysis of the hopper and the head shaft is carried out,and the first six natural frequencies of the hopper and the head shaft are obtained.A preliminary test is carried out for the optimized hopper throwing efficiency,and the test results are good.The bucket elevator after the optimization of the transmission chain transmission system was experimentally verified.The service life of the bucket elevator was predicted based on the elongation of the conveyor chain after three months of work.