风选机构设计毕业论文技巧.doc

机械交通学院“卓越工程师”班 毕业设计 题 目 班 级 姓 名 学 号 答辩时间 年 月  新疆农业大学机械交通学院  关键词:清选机，单相电源，平面筛，曲柄连杆传动机构,风筛式 Abstract At present, the grain cleaner can be basically already self-sufi}cient athome. But the most part is the complete sets seed-processing equipment, and its high price, heavy weight and high energy consumption cant meet the demand of the small-size seed producing and running department. Therefore,developing the grain cleaner which accords with of our national conditions has great significance to improve seed quality, agricultural economic benefits and agricultural modernization. According to the economy of the department and engineering level of the different kinds of seeds of our country, the thesis bases on the national conditions and we have exploited the small-size gain cleaner which has strong practicability and good market prospects. Based on introducing the states-of-art of the seed processing equipment at home and abroad, the significance and market demand of the small-size grain cleaner which is easy to operate, convenient to use and has the low price are analysed. Having made the overall design plan of the system, the framework, vibrosieve, vibrating mechanism and the centrifugal fan of the system are mainly researched and designed. This small-size gain cleaner is adopted single-phase 220 volts to supply power and it is very convenient to use, economize the energy and motive force only need 1.Skw The framework is designed for the thill. The machine is fixed the underwall of the vehicle and it is convenient to move. The feeding device is adopted the overhead men hoisting device and used flashboard valve to control the flow. It is of simple structure, easy to operate and even to feed the material. The top sieve of the vibrosieve is adopted round-hole prissy screen and round-hole plansifter of the lower sieve. The thick impurity and small valley have the higher rate of the grain separation. B