Design And Experimental Study Of Key Components Of Small Self-propelled Corydalis Tuber Harvester

Yuanhu,as a large traditional Chinese medicine,is widely cultivated for its good medicinal effects and high economic value.At present,the harvesting of Yuanhu is still mainly done manually,with high labor intensity and low efficiency,and the harvesting effect of harvesters on the market is not ideal.To achieve this,it is necessary to develop a small Yuanhu harvester that can be suitable for various soil environments and small areas of Yuanhu,with dispersed planting modes,to efficiently harvest Yuanhu.Therefore,this article further studies on the basis of a small self-propelled Yuanhu harvester,and the main work content of the study is as follows:1.The overall scheme of the Yuanhu harvester was demonstrated and analyzed,and key components were designed based on modular design ideas.Three types of soil crushing rollers and two types of screening devices have been designed for different harvesting environments and user needs.These models,through combination and replacement,enable the Yuanhu harvester to adapt to both sand and loam harvesting environments,improving the applicability of the harvester.2.The crushing power and transportation power of the lifting and crushing device were calculated,the chain drive was designed,and a test platform was built.The response surface test method was used to investigate the influence of various parameters on the soil crushing effect,and the optimal operating conditions for the soil crushing device were obtained: spacing of 10 mm,lifting angle of 15 °,and relative speed of 1.0m/s;The corresponding soil crushing rate is 97.74%,and the damage rate of Yuanhu is 1.69%,proving that the soil crushing device can effectively crush soil while ensuring the damage rate of Yuanhu.3.The mass substitution method was used to design and calculate the mechanism balance of the screening device,reducing the impact of its unbalanced inertia force and creating a physical test platform.The response surface test method was used to investigate the influence of various structural and motion parameters on the screening effect of soil,and the optimal operating conditions for achieving the screening effect of the screening device were obtained:crank speed 129r/min,feeding amount 450g/s,and slide rail inclination angle 71 °;The corresponding soil screening rate is 96.51%,and the damage rate of Yuanhu is 0.95%,proving that the screening device can effectively remove soil with less damage to Yuanhu.This article enhances the applicability of the small Yuanhu harvester by designing the key components of the harvester;By making prototypes of two key components,the soil crushing device and the soil screening device,and conducting experiments,the feasibility of their operation was verified,and the phased task of producing the entire Yuanhu harvester was completed.