我国是农业大国,秸秆资源非常丰富,利用好秸秆资源可极大地解决动物饲料紧缺问题,同时也极大地解决焚烧秸秆带来的环境问题.本文在分析秸秆膨化机工作机理的基础上,对秸秆膨化机中的关键部件螺杆及腔体进行结构设计.为解决膨化机输料堵塞问题,在不更换电机的条件下,通过ANSYS Workbench的流体模块,对螺杆外腔体的速度流场、涡流黏度流场和工作压力流场等进行有限元流场分析,对比得出螺杆与套筒间隙最佳区域.根据标定的生产目标进行试验验证,当螺杆与套筒间隙为5 mm时,秸秆膨化机的结构能达到预期的生产效率,秸秆膨化质量良好.本文研究的秸秆膨化机改变了秸秆的适口性,将适口性差的农作物秸秆变为适口的饲料.

The substrate for rice seedling raising is crushed by crushed waste straw,which can effectively reduce the environmental pollution caused by incineration.However,due to the low drying efficiency and uneven drying in the drying process of the substrate,the local drying space is extracted,and the motion law of the air around the substrate is simulated by the CFD technology.The influence of the shape and placement of different air outlets on the velocity distribution of air is discussed.Through detailed comparison of the air velocity distribution maps of different air outlets,when the outlet size is 8 × 230 mm and perpendicular to the length of the substrate plate,the air velocity distribution around the substrate is the best,almost zero speed zone.The analysis proves that this technology can save research cost and improve drying quality of substrate.