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针对耙齿式残膜回收机收膜率低下及漏膜严重的问题,运用Box-Benhnken的中心组合试验方法对残膜回收机收膜机构的工作参数进行试验研究,以耙齿曲率半径、耙齿入土角度、耙齿间距为影响因素,以拾膜率、漏膜率为试验指标进行3因素3水平的响应面试验。建立响应面数学模型,分析各影响因素对作业质量的影响,同时对影响因素进行综合优化。试验结果表明:拾膜率影响显著顺序依次为耙齿曲率半径、耙齿入土角度、耙齿间距;漏膜率影响显著顺序依次为耙齿入土角度、耙齿间距、耙齿曲率半径;最优工作参数组合为,耙齿曲率半径195mm、耙齿入土角度60°、耙齿间距110mm,对应的收膜率和漏膜率分别为94.7%、0.75%,且各性能指标和理论优化值相对误差均小于5%。研究结果可为耙齿式残膜回收机收膜机构的结构完善设计和作业参数优化提供依据。
In order to solve the problem of low pick-up rate and serious leakage of the harrow film remover, the center-box test method of Box-Benhnken was used to test the working parameters of the film harvester. Tooth penetration angle and rake tooth spacing were the influencing factors. The response surface test of 3 factors and 3 levels was carried out with the membrane-picking rate and the leakage rate as the experimental indexes. The mathematic model of response surface is established to analyze the influence of each influencing factor on the work quality and the comprehensive optimization of the influencing factors. The results show that the order of influence of the film pick-up rate is the radius of curvature of rake, the angle of rake entry and the distance between rake teeth. The order of influence of leakage rate is as follows: rake angle, rake pitch and rake radius of curvature; The working parameters are as follows: the radius of curvature of rake tooth is 195mm, the angle of rake tooth entry is 60 ° and the distance of rake tooth is 110mm, the corresponding film take-up rate and leaky film rate are 94.7% and 0.75% respectively, and the relative error between each performance index and theoretical optimization value Less than 5%. The research results can provide the basis for the structural optimization design and job parameter optimization of the harrow-tooth residual film recycling machine.