残膜回收机带式卷膜装置设计与试验

为解决现有残膜回收机集膜装置在集膜和卸膜过程中残膜质地松散、作业效率低等问题,设计了一种带式卷膜装置。阐述了该带式卷膜装置的基本结构和工作原理,通过理论分析确定了关键部件结构参数,分析了卷膜作业过程,经过计算分析得到可卷收残膜膜卷的最大直径、卷膜速比范围、卷膜倾角范围。采用三因素三水平Box Behnken试验设计方法,建立了各因素与膜卷密度之间的数学模型,确定了较优工作参数组合为:机具前进速度5.38 km/h、卷膜速比为1.19、卷膜倾角为80°,此时平均膜卷密度为122.7 kg/m³。田间试验表明,卷膜装置作业性能稳定,膜卷质量良好,满足设计和实际作业要求。

Design and Experiment on Belt-type Curl-up Film Device for Residual Plastic Film Recycling Machine

Collecting operation is the last step of residual plastic film recovery.Most of the existing residual plastic film collectors collect residual plastic film by collecting box,which is not conducive to storage and transportation,and easy to cause secondary pollution.In order to solve the problems of loose texture and low efficiency in the process of residual plastic film collecting and unloading,a belt-type curl-up film device which could realize film curling up and automatic film unloading was designed.The belt-type curl-up film device of the residual plastic film recycling machine introduced coiled the residual plastic film into a film coil with a certain compactness,which solved the above problems.Through the design and analysis of the key components of the curl-up film device,the driving form of the curl-up film belt,the selection of air spring and other structure and operation parameters was determined.At the same time,the operation process of curling up film was analyzed,and the diameter range of the residual plastic film coil and the curl-up angle range were obtained.The hydraulic system of flip-unload film was designed for automatic film unloading.The mathematical model between the key parameters and the residual plastic film coil density was established by using the three factors and three levels Box Behnken test design method.The optimal combination of the motion parameters of the belt-type curl-up film device was determined as follows:the forward speed of the unit was 5.38 km/h,the curl up speed ratio was 1.19,the curl up angle was 80°,the average coil density was 122.7 kg/m³,and the average time of film unloading and resetting was 33 s.The field test indicated that the operation performance of the belt-type curl-up film device was stable and the quality of the film coil was good,which met the design and practical operation requirements.