Study on the throwing device of residual film recycling machine for the plough layer

An innovative residual film recycling machine for the plough layer (RFRMPL) is proposed in view of difficulty in picking up residual film and the easy missing out on picking up fine residual film. In this study, the soil throwing device is designed and optimized, as the soil throwing efficiency of the throwing device is essential for residual film separation efficiency of the RFRMPL. The soil throwing efficiency is selected as evaluation index, and a mechanical simulation model of throwing device based on Discrete Element Method (DEM) and Rocky is built up according to structure and working principle of the soil throwing device. The optimal combination of working parameters of the throwing device is obtained via theoretical calculations, single and multi-factorial simulation test. The results show that the optimal working parameters of rotation speed of the rotary tilling mechanism, speed of the soil elevating mechanism and the distance between the rotary tilling mechanism and soil elevating mechanism are 200 rpm, 320 rpm and 130 mm respectively. The field validation test is carried out based on the optimal combination parameters. The results show that soil throwing efficiency of the soil throwing device is 87.45 %. The error between the field validation test results and the simulation results (90.42 %) is 3.4 %, which proves the correctness of the simulation model. It can provide theoretical reference for the design and optimization of the RFRMPL.