Design Of Single-Rope Circulation Transportation Ropeway In Mountain Orchard

At present,the forestry and fruit industry has become an important pillar for farmers to increase their income.With the transformation of production and management mode and the increase of labor cost,the demand for orchard mechanization is more and more urgent.However,most of the orchards in our country are located in hilly and mountainous areas,with complex terrain and closed orchards,the existing operating machinery is difficult to enter the ground and easy to lose stability,especially the fruit transportation link,which is mainly manual,with high labor intensity and low transportation efficiency.Although some areas have appeared the track transporter,it is not suitable for large slope terrain and long-distance transportation,and the transportation form is single.Therefore,a single rope circulating transportation ropeway for mountain orchard is designed in this paper.The transport vehicle forms a grid rail transportation system with track transporter and field transporter through fruit transfer platform.The main research contents are as follows:(1)According to the actual orchard topography,the overall scheme of single rope circulation transportation ropeway in Mountain Orchard is determined.The machine is mainly composed of driving device,tension system,transfer mechanism,return sheave,circulating steel wire rope,bracket,support roller and remote control system;it is driven by electric motor and realizes fruit box circular movement by return sheave;the ropeway conveyor arranged longitudinally forms grid transportation system with transverse monorail car or field transportation car.The industrial remote control is used to realize remote control.(2)According to the overall plan,the key component parameters of the single-rope circulation ropeway in the mountain orchard are determined,and the structural design and simulation are performed.A three-dimensional model of the virtual prototype is established using Solidworks.The maximum stresses of the static stress analysis of the bracket and the cable wheel by Ansys software are 157.61 MP and 2.139 MPa,which meet the strength requirements.According to theoretical analysis and ADAMS dynamics simulation,it is determined that the drive mechanism is installed in the upper station and the tension system is the optimal configuration scheme when installed in the lower station.(3)In order to avoid the excessive rope vibration caused by the single-rope circulating ropeway during operation,the vibration law of the steel rope under different working conditions was analyzed.Based on the analysis of the load of the steel rope during unloading and movement,the vibration equations of the two working conditions are established respectively.The mode shape of the steel rope during unloading is plotted using Matlab,the first main vibration amplitude is the largest,thus determining the unloading point position;analyzing the relationship between the vibration frequency of the steel rope movement and the tension of the steel cable,the load mass and the vehicle coupling spacing,the vibration frequency increases with the increase of the tension and spacing of the steel cable,and decreases with the increase of the load mass.(4)Based on the above design and analysis,a prototype was trial-produced and performance tested.The results show that the machine operates at a speed of 0.8m / s,when the weight of the weight is 100 kg,the deflection without load is 11.3cm,the deflection under 10 kg load is 28.5cm,and the longest distance of the wireless remote control is 285 m,which basically meets the design requirements.