关键词: 机械设计, 振动筛, 联合收割机, 动态仿真, 参数优化

Abstract: Based on the analyses of the working mechanism and the movement behavior of the combine harvester vibration sieve, a model for the vibration sieve was built using the software ADAMS, and its dynamic simulation and parameter optimization were performed. The simulation results show that the structure parameters and the movement parameters of the vibration sieve before optimization are satisfactory for grain cleaning, but the vertical vibration amplitude of the sieve backend is quite large to obstacle the grain separation. The optimized sieve parameters reduce the vertical amplitude of the sieve backend, making the grains go easily through the sieve pores to be separated, and consequently help to reduce the grain loss rate and impurity rate.

Key words: mechanical design, vibration sieve, combine harvester, dynamic simulation, parameter optimization