Design And Test Of Camellia Fruit Harvesting Device With The Type Of Hydraulic Drive

At present,the problem of mechanized picking of Camellia fruit in our country has not been solved.There are mainly technical problems,such as low picking efficiency,high missed harvest rate and high bud damage rate,and existing picking equipment is difficult to work continuously on gentle slopes.Therefore,in view of the above problems,this paper deeply researched and analyzed the development status of forestry fruit mechanized picking equipment at home and abroad,especially in China.A three-dimensional model of a virtual prototype of a hydraulically driven Camellia fruit harvesting device was established in the three-dimensional software Solid Works,and related simulation analysis was performed with the help of ADAMS software and ANSYS software.After processing,assembling and debugging the prototype,a three-factor three-level orthogonal test was performed.The main research methods used and the final research conclusions are as follows:(1)Structural design of the Camellia fruit harvesting device.Firstly,the overall structure of the hydraulically driven Camellia fruit picking machine was determined.Secondly,an adjustable Camellia fruit picking head was designed for different Camellia fruit varieties,and an inverted umbrella-shaped Camellia fruit collecting device used in the picking machine was designed.;Finally,the rationality of the working principle of the recovery device is initially verified through theoretical analysis.(2)The physical model of picking head and rubber roller interaction was simplified.The multi-rigid body dynamics software ADAMS and Workbench were used to display the dynamics module.The Camellia fruit were analyzed under different rotation speeds of the revolving frame,under different rubber roller intervals,Collision contact force and stress and strain conditions under the diameter of the rubber roller.The simulation results show that the contact impact force and stress and strain of Camellia fruit increase with the increase of the rotation speed of the rotary frame,and the rotation speed of the rotary frame of the Camellia fruit falling should be greater than 14 r / min;Changes in the distance between the upper and lower rubber rollers and the diameter of the rubber rollers have a certain effect on the impact force,stress and strain on the Camellia fruit.(3)The stability of the picking mechanism is analyzed from three aspects: the strength of the key bearing components of the Camellia fruit picking device,the modal of the picking arm,and the overturning stability of the whole machine.The results of strength simulation analysis show that the strength of key components of the picking mechanism meets the requirements;modal analysis shows that the picking mechanism does not appear resonance;the overturning analysis of the whole machine indicates that the weight of the picking head needs to be further optimized or increased at the end of the whole machine Counterweight to balance overturning moment.(4)A three-factor three-level orthogonal experiment was designed and tested at the Jiangxi Academy of Forestry.The primary and secondary factors affecting the missed recovery rate,flower bud damage rate,and picking efficiency of the three factors and the optimal parameter combination were obtained;and the average missed recovery rate of the device was 12.72%,the flower bud damage rate was 12.54%,and the picking The efficiency is about 110 pcs / min.The Camellia fruit harvesting device with the type of hydraulic drive developed in this paper can provide a reference for the improvement and development of subsequent Camellia fruit harvesting devices.