Design and research on hydraulic system of reed and bamboo-shoot harvester's lifting and pitching mechanism
When the reed and bamboo-shoot harvester is working,the distance between the picking head and the ground should be adjusted.In this article,in view of the adjustment of the picking head's position,a hydraulic system is developed for the harvester's lifting and pitching mechanism.By describing the working process of the harvester and analyzing the principle of its lifting and pitching mechanism,efforts are made to draw the schematic diagram of the mechanism's hydraulic system and cal-culate the key parts,in order to work out the relevant parameters of the hydraulic actuator as well as the models and parameters of the key hydraulic components.Then,the dynamic characteristics of the hydraulic actuator under different working conditions are explored in the AMESim software;the working process is simulated;the hydraulic cylinder's flow,speed and change in the dis-placement curve are obtained.Finally,the hydraulic system of the reed and bamboo-shoot harvester's lifting and pitching mecha-nism is installed,debugged and tested in the field.In the field-performance test,the system is running smoothly.Through a se-ries of formula calculation,it is concluded that as for the lifting hydraulic cylinder and the pitching hydraulic cylinder,the devia-tions of the rising speed are 11.5％and 10％,the deviations of the descending speed are 9.2％and 10.5％,and the deviations of the distance from the ground are 5.7％and 7.9％,which completely meets the requirements of the reed and bamboo-shoot har-vester in operation.
万方数据
维普
