| Harvesting of Camellia oleifera fruit is one of the important links in the production of Camellia oleifera.In recent years,the state attaches great importance to the development of Camellia oleifera industry,and has introduced a number of support and preferential policies to promote the rapid development of Camellia oleifera industry.But picking Camellia fruit mainly depends on manual picking or by ladder,penny,bamboo hooks and other hand tools for picking,large labor intensity,poor working conditions,picking efficiency is low;Semi artificial picking equipment-machinery,to some extent,reduce the work intensity of picking personnel,but the work efficiency is still not high.And only suitable for single family small workshop;Camellia fruit picking backward methods can not meet the requirements of modern production,therefore,the mechanization of Camellia fruit picking imperative.(1)In this paper,firstly,the general scheme of Camellia oleifera fruit picking test stand was determined by consulting the relevant data and literature of the harvester at home and abroad.Research on the bio-mechanical properties of Camellia fruit showed that: "Wan Shu No.1" Camellia fruit average diameter is about 20.78 mm,the quality of the average value is 10.86 g,the average value of Camellia fruit stalk and branches of longitudinal tensile force is 9.08 N,the average value of the lateral torsional force is 11.43N;the data provides a theoretical basis for the design of Camellia fruit vibration the inertia force of the device,through the analysis of picking mechanism of tea fruit show;the main factors of the camellia fruit fruit is the vibration frequency(ω),vibration time(T)and amplitude(A).(2)Through the Pro/E,the detailed design of Camellia oleifera fruit picking table was carried out,and the key components of the vibration device were calculated in detail;The stress and strain cloud of the frame are obtained by ANSYS static analysis.The maximum stress and strain position of the frame are determined.The design and selection of the frame are in accordance with the relevant requirements.Modal analysis is carried out on the basis of static analysis,The inherent frequency of the frame under prestressing is obtained.(3)The relationship between the total kinetic energy and the potential energy of the tea-fruit test bench was obtained by using the Lagrangian equation method,and the kinetic equation was obtained.The simulation curves of the main joint force,moment and amplitude,velocity,acceleration and force are obtained by simulation of ADAMS.The reliability and stability of the design are verified.(4)By means of four factors and three levels orthogonal test based on test bench of Camellia fruit picking: Camellia fruit picking bench mining net rate factors from primary to secondary order operating frequency(B),vibration time(A),beating rod material(D),amplitude(C).The main factors influencing the damage rate of Camellia oleifera fruit picking experiment table were the vibration time(A),the operating frequency(B),the operating amplitude(C)and the beating rod material(D).Through the analysis of single factor operating frequency,it can be seen that when the operating frequency is 3.6r / s,the yield of Camellia oleifera is higher and the damage rate is smaller.The optimal vibration time was 90 s,the operating frequency was 3.6r/s,the operating amplitude was 200 mm,and the beat material was epoxy resin. |
