Design of a Harvesting Machine for Panax notoginseng Stems and Leaves Under the Forest and Simulation Experiment of a Reciprocating Cutting Blade
Panax notoginseng belongs to the long stemmed crop,and the harvesting of its stems and leaves is one of the important processes.Aming at the problems of high labor intensity and lack of mature harvesting equipment,based on the agronomic requirements of Panax notoginseng cultivation and the mechanical parameters of Panax notoginseng stems,a harvesting device for Panax notoginseng stems and leaves under the forest was designed,which mainly consisted of a control box,a frame,and a leaf cutting device.The overall size,cutting stroke,forward speed and cutting pair width of the device were determined,and the device structure was compacted,which met the requirement of harvesting.The design of key structural parameters for reciprocating cutters mainly included moving blade,fixed blade,crank connecting rod mechanism,blade protector,etc.The reciprocating cutter could meet the technical requirements while didn't damage seedlings and miss cutting Panax notoginseng stems and leaves.A kinematic analysis was conducted on the cutter,and it was determined that the cutting speed was 0.4～0.8 m·s-1,which ensured the cutting effect while also ensuring the stability and safety of the entire machine.A rigid flexible coupling simulation model of Panax notoginseng stem and cutting blade was constructed,and cutting blade simulation analysis was carried out with the maximum cutting force as evaluation index.Based on three factors and three levels test results,it was found that the factors affecting cutting from large to small were cutting angle,cutting speed and tool configuration.The reduction effect of blade shape on Panax notoginseng stem cutting force was determined,with triangular blade＞trapezoidal blade＞rectangular blade,The optimal parameter combination for the stem cutting blade of Panax notoginseng was cutting angle of 90.5°,triangular blade shape,and cutting speed of 0.52 m·s-1.At this condition,the maximum cutting force was 7.46 N,which met cutting requirements.
Panax notoginsengstems and leaves harvesting devicereciprocatingsimulation analysisANSYS
万方数据
维普
