Design And Experiment Of Key Parts On Picking Machine For Camellia Oleifera Fruit

In recent years,tea oil is very popular in market because of it's high comprehensive value.With the strong support of the state,Area of Camellia oleifera in China is increasing,However,the harvesting of Camellia oleifera fruit relies on manual labor which is difficult to employ,high labor intensity,low efficiency and high labor cost.The harvesting of Camellia oleifera fruit has become a weak link in the production process of Camellia oleifera in China,which has seriously hindered the development of Camellia oleifera industry in China.The mechanized harvesting of Camellia oleifera fruit is an important way to solve this problem.Therefore,the design of key components of Camellia oleifera fruit harvester is of great significance to the research and development of Camellia oleifera fruit harvester and the realization of mechanization of Camellia oleifera fruit harvesting.In this paper,through summarizing the research status about fruit harvesting,field investigation,theoretical analysis and experimental study on physical characteristics of Camellia oleifera fruit,the design of the device for harvesting Camellia oleifera fruit was carried out,and the structure of device was analyzed by simulation software.Finally,field experiments were carried out.The main research work and achievements are summarized as follows:(1)This paper introduces the background and purpose of this research,consults the relevant literature of fruit harvesting,analyses and summarizes the research status of fruit harvesting,and determine the research direction of this paper.(2)Through orthogonal test and supplementary test,the effects of different factors on the fruit removal force were explored,the results showed that degree of the ripeness was highly correlated to its fruit removal force;With the increase of the pull angle,the fruit removal force decreases gradually.The forced vibration separation test shows that there were two main motions in the branches of Camellia oleifera after being knocked,and the direction of motion of Camellia oleifera fruit was opposite to the direction of knocking force.The average impact force is 15N through the impact force sensor.(3)Vibration picking model of Camellia oleifera fruit was established.Three main factors affecting the effect of vibration picking were obtained by solving the model:vibration frequency,vibration amplitude and vibration duration time.Through field investigation,combined with previous experimental research and theoretical analysis,the overall design idea of harvester of Camellia oleifera fruit was put forward,and the structure design of picking device was completed,and the three-dimensional model of the picking device was established by using SolidWorks software.At the same time,the modal analysis of the rack of the picking device is carried out by using ANSYS software.Finally,the reliability of the structure of the picking device is verified by using ADAMS software.(4)Basis on theoretical research,the Camellia oleifera fruit picking device was processed and manufactured.Orthogonal experiment and single factor experiment were carried out with the recovery rate as the response index.Finally,the optimum combination of working parameters was obtained,the optimum working parameters were vibration frequency 8 Hz,vibration amplitude 70 mm and operation time 50s.