Dynamic Characteristics Of Belt Conveyor Driven By Line Friction Were Studied Based On RecurDyn

As a special type of belt conveyor,the linear friction drive belt conveyor is widely used in long-distance,large-volume transportation.The method of using static analysis and increasing the safety factor to design the linear friction drive belt conveyor has great limitations,and there are few related researches on its dynamic characteristics.This paper will simulate and analyze the two situations of laying the auxiliary unit at different locations of the branch on the main engine and changing the number of auxiliary units to lay when the total captain of the auxiliary unit is equal.This research has a certain guiding effect on the transformation of the existing large-scale belt conveyor with the intermediate linear friction drive and the initial design of the linear friction drive belt conveyor.It can optimize the design,improve the reliability of the system,and reduce the cost and operating cost.Based on the belt conveyor in the main inclined shaft of Xinjiang Tuntai Coal Mine and the "DTII(A)Belt Conveyor Design Manual",this paper designs the main engine in the linear friction drive belt conveyor.Following the design and calculation method of the center-line friction-driven belt conveyor in "Special Belt Conveyor Design" by Professor Song Weigang of Northeastern University,the total captain and minimum number of auxiliary engines under the full load condition of the main engine are calculated.Based on the similar principle,use the belt pulley toolkit in Recur Dyn software to build a virtual prototype of the linear friction drive belt conveyor.Using the distinctive MFBD patented technology in the software,the conveyor belt is discretized into more than four thousand finite element flexible shell4 elastic shell elements,and the connection force between the elements follows the viscoelastic mechanical relationship in the Kelvin-Voigt model.Innovatively compiled various starting functions of the belt conveyor under natural shutdown conditions,and co MPared the speed and acceleration curves of various starting methods,and selected the parabolic acceleration starting method to start the conveyor system.Simulate the operation of the main engine under no-load conditions and under load conditions,analyze its dynamic characteristics,and complete the verification of the virtual prototype.Simulation analysis of the specific advantages of arranging the intermediate linear friction drive on the belt conveyor.Simulate and co MPare the different effects on the dynamic characteristics of the loaded main engine when laying a 5m captain auxiliary machine and two 2.5m captain auxiliary machines on the main engine.The simulation co MPares the different effects on the dynamic characteristics of the loaded main engine when two auxiliary machines with a length of 2.5m are laid at different positions on the main engine.Through various simulations,it is concluded that arranging auxiliary machines on the main machine can indeed reduce the maximum tension on the main machine’s conveyor belt,and can also reduce the main machine’s demand for effective circumferential force on the driving roller.When the auxiliary machine is running,its conveyor belt will also cause a certain squeeze on the main machine conveyor belt.Arranging auxiliary machines on the main machine can effectively reduce the output power of the main machine’s driving roller.This part of the reduced propulsion is output by the drive roller of the ancillary machine.The effective power value output by the conveyor system is decided by the whole running drag force of the host.When the total length of the auxiliary machines arranged on the main machine is the same but the number of them is different,the dynamic characteristics of the main machine are different.A larger number of auxiliary machines will keep the conveyor belt of the main machine running more s Tab,and significantly reduce the main machine’s demand for the output power of the drive device.Longer auxiliary machine captains will more obviously reduce the maximum tension value on the main machine conveyor belt.When using Recur Dyn software to design a linear friction-driven belt conveyor,input the fixed angular velocity curve of the driving roller of the main and auxiliary machines,and the maximum output power value of the driving roller of the main and auxiliary machines can be obtained through simulation,which provides help for the selection of the motor.Analyzing the different arrangements of the dual auxiliary machines on the main machine,it can be seen that when the auxiliary machines are arranged close to the tail roller of the main machine,the deviation of the main machine’s conveyor belt is the lightest,the maximum stress value of the main machine’s conveyor belt is the smallest,and the real-time maximum output power value of the driving roller of the host is the smallest.It can be seen from the stress cloud diagram of the main machine conveyor belt that the stress on the conveyor belt is distributed in a wave form,and also transmitted in a wave form.