Study On Axial-flowing Peanut Picking Device With Spiral Bow-teethes

Peanut production capacity in China is the first in the world.But the peanut havest mechanization technology and application is lower than the United State,China peanut harvest mechanization level is just 29.44%,mainly depend on artificial and small machine for segmentation harvesting,but low efficiency and high labor cost restrict healthy and stable development of peanut industry.The picking is one of very important link in peanut harvest mechanization,the quality of the picking device determine the harvest efficiency and the peanut quality in post harvest.Combination with the National Science Foundation Of China(project number:5157367)and State's Key Project of Research and Development Plan:" Development of the intelligent oil crop harvest technology and equipment"(project number:2016YFD702100)carrying out,for solve the axial-flow picking device problem that bad transporting,twining,low picking efficience,high pod broking rate and poor cleaning apply in peanut combine,picking combine and picker-only.Further study the axila-flow full-feeding device's sturcture,mechanic and different peanut variety physics mechanical properties influence picking.developing the axial-flow full-feeding bow-tooth screw picking device,and testing the parameter and performance.Testing research different variety peanut plant physical mechanical character,mearsuring moisture content of peanut in different time.analysis the relationship between peanut stem,plant and stem,pod and stem tensile strength with moisture,the relationship between peanut straw shearing strength with moisture;measuring friction coefficient between peanut plant with different material surface.To supply theoretical basis for design peanut picking device.Compare with the semi-and full-feeding peanut picking device's structure,working principle and picking characteristics,for descrease the machine volume,increase picking time and picking rate,in this paper the picking device scheme choose the axial-flow full-feeding peanut picking device.Analysising the peanut plant stress in picking roller and establsh mechanical model;designing the picking roller length,revolving speed,diameter,intersection angle between screw and roller generatrix,bow-tooth structure and arrangement,concave form and sieve pore dimension;The working principle of qingyuan systems was analyzed,research the rules of floating,design air-suction inlets with vibration screen pod cleaning device,and ascertain the parameter.Performance testing for axial-flow full-feeding picking device.The test result show that picking gap,feed quantity,rotating and speed of cylinderhave great influence to picking.the three parameters:picking gap,feed quantity,rotating speed of cylinder are selected as experimental factors,the peanut picking and breaking rate are selected as experimental indexes.Through orthogonal test,the mathematical model is established between the experimental factors and indexes and studied on the response surface optimization,The working parameters of picking performance are optimized.