Design And Tests Study Of Celery Harvester

In people’s daily life,celery is an indispensable stem and leaf vegetable,with high nutritional value,which is favored by consumers.As China’s celery planting area is increasing year by year,celery harvesting operations mainly rely on artificial,high cost and low efficiency of the current situation and the contradiction of labor shortage is increasingly prominent,restricting the development of celery planting industry.Therefore,the research on domestic celery harvesting machinery and equipment and its key technologies has important scientific significance and application value.Based on local celery in Southern China as the research object,according to the agronomic requirements of celery cultivation,follow the principle of combining agricultural machinery and agronomy,designed a handheld celery harvester with main devices such as a cutting device,a harvester reeling device and a cutting knife position adjustment device,carried out the cutting mechanism of kinematics and dynamics modeling and analysis,and using dynamic simulation to verify,conducted a harvester prototype test,the research content and results of this paper are as follows:(1)By searching relevant literature and data of leaf vegetable harvesters,the working principle and current situation of various leaf vegetable harvesters are described,the main problems of leaf vegetable harvesters in China are analyzed,and the research content of celery harvester is proposed.(2)Analyzing and testing the physical and mechanical properties of celery,statistically analyzing the physical parameters of celery,using the universal material testing machine to cut the celery root,the cutting force needed to cut the root,providing a basis for the design of the subsequent cutting device.According to the agronomic requirements of celery planting,the overall scheme of celery harvester was designed.(3)The kinematics and dynamics model of the celery harvester cutting mechanism was established,and the parameters of the cutting mechanism and the cutter structure were designed.The computer aided analysis software of the mechanism based on MATLAB was developed,and the kinematics and dynamics characteristic curves of the cutting mechanism were calculated by the software.(4)Carry out the design of key components such as celery harvester reeling device and cutting position adjustment device.The kinematics analysis,main parameters and structure design of the harvester reeling are carried out.A cutting tool position adjusting device composed of PLC,electric push rod and stroke switch is presented.(5)To carry out the simulation and verification of the cutting mechanism prototype of celery harvester.SOLIDWORKS 3D software was used to build 3D solid modeling of the parts of the cutting mechanism,and the virtual prototype of the mechanism was built and imported into ADAMS for kinematics and dynamics simulation analysis.The simulation analysis results were basically consistent with the theoretical calculation results,which verified the correctness of the cutting mechanism design.(6)The celery harvester prototype was processed and assembled,and the performance test of the prototype was carried out.The test results showed that the celery harvester designed in this paper basically completed the adjustment of cutting position,cutting off celery root and plucking grain operation,but the effect of cutting into the soil still needed to be further improved.