Design and Experiment of a Opposite Roller Extrusion Type Allium chinense Harvester
Aming at the problems of poor rhizome soil separation and high damage rate in mechanized harvesting of Allium chinense,a new type of Allium chinense harvester was designed,which was mainly composed of digging shovel,swinging sieve,nail roll,throwing roll,buffer laying device.This paper studied the working mechanism of"opposite roller crushing soil+squeeze-brushing separation"of the Allium chinense harvester,which was that the soil crushing roller cooperated with the feeding roller to crush the soil at a higher speed,and the feeding roller continuously pushed backward to complete the separation of the rhizome soil of the Allium chinense;the main factors affecting the harvesting effect of the Allium chinense were analyzed and their value range was determined.A quadratic rotation orthogonal combination experiment was conducted using the forward speed of the machine,the speed difference of the opposite roller,and the rotation radius of the soil crushing roller as experimental factors,and the rhizome soil separation rate and rhizome damage rate as evaluation indicators.This article established a regression model between experimental factors and evaluation indicators,analyzed the impact of experimental factors on evaluation indicators,and optimized working parameters.The results showed that at forward speed of 0.38 m·s-1 and speed difference of 46.02 r·min-1,When the rotation radius of the soil crushing roller was 48.72 mm,the rhizome soil separation rate was 89.30%and the rhizome damage rate was 1.73%.And verification tests were conducted under the same conditions,with rhizome soil separation rate of 88.5%and rhizome damage rate of 1.78%.The machinery meets the requirements for harvesting Allium chinense,and the results provided reference for the research of rhizome soil separation technology and equipment for mechanized harvesting of Allium chinense.
国家科技期刊平台
NSTL
万方数据
