本文根据轴流装置脱粒机理的研究阐述了随机疲劳脱粒理论;分析计算了作物在轴流装置内所承受的冲击频率和冲击应力;提出了兼顾提高脱粒能力,减少茎叶破碎两方面要求的作物所承受的载荷史的设计思想。这些理论分析已被电镜扫描、高速摄影、冲击次数测定、滚筒凹板载荷电测,脱粒性能测定等一系列实验所证实。 Based on the research of threshing mechanism of axial flow device, the theory of random fatigue threshing is expounded. The impact frequency and impact stress of crops in axial flow device are analyzed and calculated. The crops that meet both the requirements of raising threshing ability and reducing stem and leaf fragmentation are proposed The design history of the load history. These theoretical analyzes have been confirmed by a series of experiments such as electron microscope scanning, high-speed photography, measurement of the number of impact, load testing of drum concave plate, determination of threshing performance and the like.