| Camellia oleifera is a unique oil tree species in southern China,with a long history of cultivation and a large cultivation area.The management of Camellia oleifera is an important factor affecting the yield of Camellia oleifera.Because the Camellia oleifera forest is mostly distributed in the low forest hilly area where the forest land environment is complex and the site conditions are poor,the mechanized cultivation and management of oil tea is very slow,which seriously restricts the development of the oil tea industry.In order to solve the problems of low mechanical efficiency and poor effect in the oil tea forest,it is necessary to develop a weeding machine with smart operation,compact structure and high power traction chassis.In order to adapt to the characteristics of the hilly mountain forestry breeding operation,a small semi-axis weeder was designed.The main design contents are as follows:1.Based on the three design principles of standardization,reliability and portability,and the characteristics of forest soils,weed characteristics and weeding and horticultural requirements of weeding machines,the mowing machine power selection,climbing ability,chassis and Design requirements for knife roll width and turning radius.The designed weeding machine mainly includes the power system,chassis system,transmission system,key parts for weeding,etc.,selected 190FE diesel engine,model 180×72 rubber track,modified version of Saint Tansaro transmission D2P series,minimum turning The radius is 1.7241m.2.According to the operation mode of the weeding machine to remove the grass,and on the basis of the structural design of the whole machine,the design of the key components of weeding is carried out.Y-type boring tool is selected as the weeding tool,and detailed theoretical calculations are carried out for its main technical parameters.The main technical parameters are:Y-type boring tool is used as the weeding tool,the angle between adjacent two knives a=360,tooth root width L=15mm,the root angle －=100°,the tool thickness δ=8mm,the length of the knife roll is 0.75m,the cutters are arranged on the knife roll in the arrangement of the double helix,and the force analysis of the tool during the movement and the strength of the knife roll are carried out.Check the analysis to provide a basis for subsequent prototype manufacturing and other component selection.3.The orthogonal test and the quadratic regression rotation test were used to clarify the main order of the three factors affecting the weeding efficiency and the optimal working conditions.The test results show that the main order of the effects of herbicidal efficiency:weeding depth →weeder forward speed →knife roll speed.Optimal working conditions:the weeding blade rotation speed is 188.79r/min,the weeding depth is 30mm,and the forward speed is 0.617m/s.The verification test of different soil moisture content was carried out,and the working conditions required for different weeding requirements were obtained,and the feasibility and practicability of the minicomputer were verified again. |
