Traditional rake mulching film recycling machine had the problem of difficulty in unloading and packing film,poor continuity of the work.In order to solve such problems,a kind of chain rake type mulching film recycling machine which can realize continuous raking film,collecting film,transporting film,shaking off soil and unloading film was designed.The recycling machine mainly composed of frame,membrane shovel,chain rake,collecting box and so on.In order to optimize the performance of the film recovery machine,first of all,the single factor test and response surface optimization experiment were carried out on structural parameters and working parameters in soil tank laboratory.Through experimental study in soil tank,the quadratic regression equation of mulching film recycling rate,unloading film rate and quality of the soil in the film were obtained.The optimal parameters were as follows:the spacing between rake teeth assembly was 300 mm,the number of rake tooth in single rake was 5,the depth of rake tooth inserting soil was 84.41 mm,film recycling machine forward speed was 2.542 km/h,and the speed of the chain rake was 0.417 m/s.Finally,through field experiments,the performance indicators of this type of mulching film recycling machine were as such:mulching film recycling rate was 90.2％,unloading film rate was 88.1％,and the entrained soil weight was 0.41 kg/m.Field experiments show that the chain rake type mulching film recycling machine can meet production requirements.%为了解决传统搂耙式地膜回收机卸膜和装箱困难、作业连续性差等问题,设计了一种链耙式地膜回收机,可以连续实现搂膜集膜、输膜抖土、卸膜过程.该回收机主要由机架、起膜铲、链耙、集膜箱等部件组成.为了使地膜回收机的性能达到最佳,首先在土槽实验室内对回收机的结构参数和工作参数分别进行了单因素试验和响应曲面优化试验,通过土槽试验得到地膜回收率、脱膜率、夹带土壤质量3个指标的二次回归方程、响应优化曲面及最佳参数组合.最佳参数组合为:耙齿总成间距300 mm,单排耙齿数5个,耙齿入土深度84.41 mm,回收机前进速度2.542 km/h,链耙线速度0.417 m/s.通过大田验证试验,得到优化后的地膜回收机性能指标为:地膜回收率90.2％,脱膜率88.1％,夹带土壤质量0.41 kg/m.大田试验表明,链耙式地膜回收机满足生产要求.
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