| Fruit tree root system cutting machine is one of the technical methods for light and simplified management of short stock orchard.Aiming at the problems of high labor intensity and inconvenient operation in root system control of short-stock densely planted apple orchards,the principle of root cutting of fruit trees and the analysis of the force model of "root-soil complex" cutting by root cutter were explored.According to the requirements of apple tree body management and gardening technology,AIP is used to design fruit tree root system cutting device and key components.The fruit tree root system cutting device meets the adjustment of root cutting depth,distance between broken root and fruit tree trunk and root cutting angle,and cutting root knife for key parts of fruit tree root cutting device Carry out optimization design analysis and test verification to realize apple tree root system cutting operation.Investigate the planting mode and root cutting operation requirements of the short anvil dense planting apple orchard,design the root cutting device of fruit trees,and design 4 root cutting knives with different parameters,straight root cutting knife,shovel straight cutting root knife,chisel-shaped root cutting knife,and shovel-shaped root cutting knife.Finite element analysis software was used to simulate the "root-soil complex" with different parameters of the root-soil cutter to verify the reliability and rationality of the"root-soil complex" model.Through finite element analysis,different parameters of the root-soil cutter were used to cut the "root-soil complex"."Soil complex" fracture process and the maximum resistance and power consumption.The results of finite element analysis show that the cutting effect of the straight root cutter with a spade and the chisel-shaped root cutter is better,and the cutting effect of the straight root cutter and the chisel-shaped root cutter with a spade is poor.Through the finite element software,the statics simulation analysis of different parameters of the root cutters is carried out,and the strength of the different parameters of the root cutters meets the requirements,which is convenient for the test research of the operation performance of the root cutters after manufacturing.Using different parameter root cutters to carry out experimental research on the performance of the root cutter,verify the horizontal resistance of the root cutter with different parameters and the finite element analysis results,and verify the root quality of the root cutter with different parameters,the time of soil entry,the horizontal resistance,the amount of soil disturbance and the amount of soil disturbance.After the operation,the design weight of the cut width is optimized and the optimal operation root cutter is the straight cutter with shovel.The results of simulation analysis of root cutting of apple tree roots were verified through experiment research of root cutting knife operation performance,and the optimal design analysis of root cutting device for fruit tree root cutting device was carried out.Select the best operation root cutter It can meet the design requirements of the root cutting device of fruit trees.Application increased the optimal operation knife field experiment,through the field experiment shows that the root root flat after cut off device operation cut broken rate was 91%,the tear at a rate of 4%,satisfies the requirement of gardening,and through the field observation test shows that the root broken cutting device after operation,cut marks staying width smaller,better soil not valgus and bridge,machines and tools through sex is good,the root cutting device operating performance good,meet the requirements.The orthogonal test showed that the optimal horizontal combination of factors affecting the elongation of new shoots in different treatments of long-branch Fuji apple tree was bilateral,with a depth of 40 cm,an Angle of 20°and a distance of 50 cm.The optimal horizontal combination of factors influencing elongation of new shoots in different treatments of Fuji apple tree was unilateral,with a depth of 40 cm,an Angle of 10°and a distance of 70 cm.The root cutting of fruit trees can not only inhibit but also promote the growth of apple trees,thus proving that the root cutting of apple trees can promote and control the growth of apple trees. |
