The Optimization Design Of The Working Device Of The Scraper And The Simulation Study Of The Hydraulic System

At present,the reverse six-bar mechanism has been widely applied in the field of scraper and loader construction machinery.The reasonable design of mechanism parameters in the working device of scraper and the matching of connecting rod mechanism and hydraulic system have direct influence on the performance of scraper.This paper takes the reverse six-link mechanism of the working device of the scraper as the research object,aiming to study the mechanism optimization,dynamic simulation,hydraulic characteristics simulation and other aspects.Firstly,the working process of the scraper is analyzed,the performance indicators for evaluating the performance of the scraper is discussed,the kinematics analysis model of the reverse six-bar mechanism is constructed through the relative coordinate vector method based on the mechanism theory,the general position equation of the bucket and the transmission ratio of the mechanism is derived,and the parameters of the bucket is redesigned.Then the mathematical model of six-bar reverse mechanism is established with the maximum transmission ratio of the bucket mechanism as the objective function.The mathematical model is solved in Matlab based on LDWPSO.Secondly,based on the above optimization results,the solid model is built in SolidWorks,The operation and dynamics of the scraper working device are simulated in ADAMS,the multi-body dynamics theory is used to verify the performance of the optimized scraper has met the design requirements.Thirdly,the principle model of hydraulic system of working device on scraper is constructed.The dynamic simulation analysis of hydraulic system of working device is carried out by AMEsim software,the dynamic characteristics of hydraulic system which meet the requirements of mechanism optimization design are explored,the simulation results verify the matching between hydraulic system and linkage mechanism.The optimization and Simulation in this paper can effectively improve the performance of the working device on scraper.