自动卸膜式残膜回收机捡拾齿和滚筒的优化

为了更好地解决破碎残膜难以回收以及残膜和土壤、根茬分离的问题,通过理论分析和试验对捡拾齿和滚筒进行优化设计。依据自动卸膜式残膜回收机的工作原理与作业要求,基于Adams运动仿真软件分析捡拾齿的运动特性,优化关键工作部件捡拾齿和滚筒的结构与参数,建立捡拾齿和滚筒的运动方程。通过捡拾率和卸膜率的正交试验和方差分析,确定影响捡拾率和卸膜率的因素和水平以及较优因素水平组合。试验结果表明,在滚筒直径800 mm,转动速度120 r/min,捡拾齿入土深度80 mm,轴向距离110 mm及周向个数为16的条件下,捡拾率最高;在卸膜辊转动速度为400 r/min及半径300 mm的条件下,卸膜率最高。该残膜回收机实现自动卸膜,不需停机卸膜,捡拾率达到89%,卸膜率达到95.4%,为新型残膜回收机的研究提供依据。

Optimization of Pick-up Teeth and Roller for Automatic Unloading Film Recycling Machine

In order to better solve the problem of broken residual film recycling and separation between residual film and stubble, soil, this paper optimized the design of pick-up teeth and drum through theoretical analysis and experiment. According to the working principle and assignment requirement of the residual film recycling machine, and the motion characteristics of pick-up teeth analyzed by motion simulation Adams software, this paper optimized the structure and parameter of key working parts of pick-up teeth and roller; established motion equation for pick-up teeth and roller; and obtained the factors and levels affecting the collecting rate and discharge rate of membrane, and the optimal level of factors combination, through orthogonal test of collecting rate and discharge rate and variance analysis. Experiment results showed that recycling ratio was the best when roller rotation speed was 120 r/min, depth of pick-up teeth buried was 80 mm, axial distance was 110 mm, number of circumference was 16. And film removing ratio was maximum when speed of unloading film roll was 400 r/min, radius was 300 mm. It has been verified by field experiment: the machine need not to be stopped to discharg membrane, and realized unloading membrane automatically, with recycling ratio 89.0% and film removing ratio 95.4%. These results have provided a theoretical basis for studying new type residual film recycling machine.