目 录摘要 1关键词11前言21.1 讨论现状..........................................................21.2 讨论意义..........................................................41.3讨论容42脱粒机脱粒原理52.1喂入方式52.2脱粒原理52.2.1冲击原理52.2.2梳刷原理62.2.3揉搓或搓擦62.2.4碾压原理62.3清选原理83总体方案确定83.1初步设计方案83.2功能分解93.3结构与工作原理103.3.1基本结构103.3.2工作原理113.3.3传动系统114设计目标与主要技术参数124．1主要技术参数124.1.1设计目标124.2脱粒滚筒与主要参数选择124.2.1转速124.2.2滚筒直径134.2.3滚筒板齿134.2.4滚筒脱粒段长度134.3凹版筛134.4风机134.5进料斗134.6机架145主要零部件设计145.1电机选择145.2带轮设计155.2.1带轮设计要求155.2.2带轮材料155.2.3带轮设计计算155.3带传动设计165.4脱粒轴 165.4.1计算各轴的最小直径165.4.2轴的结构设计175.5滚动轴承选择与校核176风机与风选筛的设计186.1风量Q的计算186.2风扇尺寸计算187键的选择与校核198总结19参考文献 19致20小型水稻脱粒机设计摘 要：为了满足山区农村水稻脱粒生产的需要，设计一种针对山区的水稻脱粒机已迫在眉睫。本文设计了一种微型水稻脱粒机的结构，该水稻脱粒机可一次性完成脱粒、筛选、分离作业。该机体积小、重量轻，操作灵活，通过性与适应性好，较好地解决了丘陵、山区和水田水稻收获的难题。该机采纳半喂入、弓齿式滚筒脱粒机脱粒，确保脱粒洁净、破裂率低，分离性能好。关键词：微型；水稻；脱粒机；分离；设计Design of the structure for Micro-rice-thresherAbstract:In order to meet the needs of the production of mountains rural rice threshing , the design of one kind of rice thresher for mountains is imminent.This paper designs the structure of a micro-rice –thresher,this kind of rice threshercan complete threshing, separation and screening operation. This machine has small volume, light weight, flexible operation, Passing ability and good adaptability to better solve the hills, mountains, and the problem of rice paddy harvest. The machine uses half- feeding, bow roller gear threshers threshing, ensure threshing clean, broken rate is low, goods...
