花生联合收获机挖掘装置研究与仿真分析

Abstract

For the peanut combine harvester excavation process resistance, poor soil crushing effect and poor reliability of the problem, the excavation shovel optimization needs improvement. Firstly, a mechanical model of the resistance of the excavation shovel was established to investigate the key factors affecting the degree of resistance of the excavation shovel. Next, the design of the main parameters of the excavation shovel was done to determine the range of values of the main factors affecting the peanut excavation shovel. EDEM software was used to simulate and analyse the excavation process and to explore the influence law of excavation shovel parameters on the resistance. Improvements were made to the excavation shovel, discrete element simulation tests were used to demonstrate that the optimized excavation device had better resistance reduction and soil crushing than the original device. By designing a three-factor, three-level orthogonal simulation test, the best parameters for the excavation shovel were obtained: the shovel surface inclination is 20°, the excavation depth is 131mm, and the shovel surface width is 277mm. Field trials were conducted under the optimal combination of parameters to test the reliability of the improved digging shovel. Compared with the operating effectiveness of the original machine, the result was improved to some extent. It proves that the optimized design of excavating shovel is reasonable and can improve the operation effect of peanut harvester.