Research On The Mechanical Characteristics Of Extruding-Rubbing Type Corn Thresher Behavior Based On Ansys Software

Corn or maize is one of the most widely distributed crops in the world, its planting area is only after wheat and rice, and ranked the third in the world. China is the world’s second biggest producer of corn, and also the second largest corn consumption country. There are many biomechanics problems in the maize grain harvest, drying, threshing and processing process, especially in threshing process of the seed corn kernel. Due to the external force of extrusion, collision and rubbing, possible induce the seed corn to crack or break. All of these will affect the seed corn security storage period, reducing the seed germination rate, increasing the likelihood of microbes or insects invasion.For the maize grain stress distributions in actual use of the extruding-rubbing type corn thresher, the ANSYS finite element analysis software was used to study the single grain, multi-grain supporting condition accordance with the top loading, ventral loading and side loading. So as to provide mechanical support to extruding-rubbing type corn thresher, provide technical guidance and theoretical basis for the design and optimization of corn thresher.The main researches are as follows:1. Research progress of domestic and foreign corn thresher, and the mechanical properties of corn seeds were summarized, especially focused on the present research of extruding-rubbing type corn thresher.2. According to the analysis of extruding-rubbing type corn thresher threshing device working principle, structure and characteristics of corn threshing, grain threshing characteristics were studied.3. Using the finite element ANSYS software, single seed com kernel analysis model was established. Through the convergence analysis of the numerical simulation, comparison of3D models and2D models, the finite element model was verified.4. For the three different possible loading direction, different moisture content in the threshing were analyzed, and further to free grain support, single grain support, two grains support and three grains support conditions were discussed in detail. Some useful conclusions and suggestions are given.