Design And Experiment Of Canopy Vibration Type Camellia Oleifera Fruit Picking Device Based On High Efficiency And Low Loss

This paper in order to adapt to a massive picking fruit,improve the efficiency of camellia oleifera fruit picking,by reviewing the relevant literature at home and abroad and the study of camellia oleifera fruit biological properties,and the crown vibration picking mechanism research,designed a kind of based on efficient and low damage canopy vibrating camellia oleifera fruit picking device,the paper research content specific have the following:(1)Through the study of the crown morphological characteristics,the growth characteristics of the secondary primary branches,camellia oleifera fruit and flower bud mechanical properties,the tree height,crown diameter,fruit and flower bud quality and binding force,secondary main branch and trunk angle,etc.The vibration frequency,amplitude and location of excitation point are the main factors affecting the shedding of camellia oleifera fruit.(2)A canopy vibration type camellia oleifera fruit picking device based on high efficiency and low loss is designed.The whole structure and working principle of the picking device are explained,and the structural design of key components such as vibrating disc,excitation device and lifting device is carried out,and it is concluded that the distribution spacing of the vibrating rod is also the main factor affecting the shedding of camellia oleifera fruit.According to the lifting,rotating and telescoping functions of the picking device in the operation process,the design of the hydraulic system schematic of the camellia oleifera fruit picking device is completed,and the AMESim software is used to simulate the hydraulic system of the picking device,and it is obtained that the hydraulic system can make the picking device operate stably,which provides the basis for the large area and engineering application of the camellia oleifera fruit picking device.(3)Through ANSYS,the static and modal analysis of the lifting table and picking arm,the strains of the lifting table and picking arm are 1.3728 mm and 5.0822 mm respectively,and the resonance phenomenon will not occur when the lifting table and picking arm are working.ADAMS software was used for flexible processing of camellia oleifera tree,and a coupling simulation model of camellia oleifera tree-picking device was established.A single-factor simulation test was conducted for camellia oleifera fruit picking,and the operating parameters of the camellia oleifera fruit picking device for each influencing factor were obtained: The frequency is 5～9Hz,the amplitude is 50～70mm,the location of the excitation point is 1500～2100mm and the spacing of the vibration rod is 80～120mm.(4)A four-factor,three-level orthogonal test was conducted and validated in field trials.The results showed that the factors influencing the net rate of camellia oleifera fruit harvesting and bud damage rate were vibration frequency,amplitude,vibration rod distribution spacing,and excitation point location in descending order of significance.The optimal parameter combinations verified by field experiments were vibration frequency of7 Hz,amplitude of 68 mm,location of excitation point of 1870 mm,and spacing of vibration bars of 115 mm.The average net picking rate of camellia oleifera fruit was 86.81%,and the average damage rate of flower bud was 9.58%,which were basically consistent with the theoretical value of model optimization,and the picking efficiency was about 9 times that of manual picking efficiency.