Design And Test Of The Bottle-planted White Hypsizygus Marmoreus Harvesting Device For Factory Production

Aiming at the problems of low efficiency,poor quality and high labor intensity in the factory harvesting of white hypsizygus marmoreus,combined with the factory planting mode and physical and mechanical characteristics of white hypsizygus marmoreus in China,this paper designed and developed an automatic harvesting device for white hypsizygus marmoreus,which can complete the separation,clamping and transportation,limit fixation,root cutting,low-loss transportation and other operations of white hypsizygus marmoreus at one time.The specific research contents are as follows:(1)Experimental study on physical and mechanical properties of white hypsizygus marmoreus during harvest.Taking the white hypsizygus marmoreus planted by Shandong Nongfa Fungus Industry Group as the research object,the physical characteristic parameters such as the total height of the white hypsizygus marmoreus plant,the length of the mushroom stalk,the diameter of the mushroom stalk,the diameter of the mushroom cap,the density,and the moisture content during the harvest period were mainly studied;Through the mechanical tests of shear,compression,tension and bending of white hypsizygus marmoreus during the harvest period,the mechanical characteristic parameters such as shear modulus,extrusion modulus and elastic modulus of white hypsizygus marmoreus during the harvest period were determined.(2)Scheme design of harvesting device for bottle-planted white hypsizygus marmoreus.Through the analysis of the factory harvesting process,combined with the physical and mechanical characteristics of white hypsizygus marmoreus,the overall design scheme was determined,and the automatic harvesting device for white hypsizygus marmoreus was designed and developed,including,flexible clamping guide device and chain rotary root cutting device,two key components,and the overall structure,working principle and control system were determined.The production layout of the mining device is designed and optimized based on simulation.(3)Design and optimization of flexible clamping guide device.The clamping mode of parallel motion is determined.Through force analysis and theoretical calculation,the key operation parameters of flexible profiling finger,spring torsion device and automatic guidance device are determined;The clamping motion equation and mechanical model of white hypsizygus marmoreus were constructed,and the influence of different factors on the clamping effect was simulated and analyzed.The parameters were optimized and tested to obtain the optimal parameter combination.(4)Design and optimization of chain rotary root cutting device.The kinematics equation of the cutter is constructed,and the sliding cutting mode is determined through the force analysis of the cutting mode;Through the analysis of cutting mechanism,the structural parameters of key components are determined and improved;A mechanical model of root cutting was built,and a three-factor and three-level simulation test was carried out.Based on the numerical simulation results,the influence of different factors on the root cutting force was analyzed,and the operation parameters of the device were optimized.(5)Trial production and harvest test of automatic harvesting device for white hypsizygus marmoreus.The prototype trial production was carried out.The Box-Behnken test method was used to carry out the whole machine harvest verification test.The three-factor and three-level orthogonal test was designed.The mathematical regression model of each test factor and evaluation index was established.The change rule of each test factor on the damage rate and harvest efficiency of white hypsizygus marmoreus was analyzed.The results showed that when the feed speed was 0.50 m/s,the running speed was 0.47 m/s,and the finger spacing was 89 mm,the damage rate and harvest rate were 8.14% and 95.71%,respectively,The harvest quality of white hypsizygus marmoreus was improved.