【作者】 王东；

【导师】 曹卫彬；

【作者基本信息】 石河子大学 ， 机械制造及其自动化， 2012， 硕士

【摘要】 我国棉花年产量在500万吨左右,价值量在750亿元左右,全国有2亿多农民直接参与棉花的生产。我国的棉花加工行业也正在从半机械化向机械化、现代化迈进,在这个大发展的洪流中,机械化生产取代手工操作,已经势在必行。但是现在疆内的大多数棉花加工厂外吸棉管喂花,基本采用人工扒垛的方式,尤其是随着高效轧花机的出现,人工喂棉已经满足不了棉花加工行业的进步和发展。本文通过对国内外喂棉机械资料的查阅和吸收,基于机械设计理论和虚拟设计等相关知识,提出一种集扒棉、拾棉、输棉于一体的自动化喂棉机的整体设计方案：扒棉支架与拾输棉支架为整体支架结构,扒棉支架与扒棉辊筒组成扒棉机构,辊筒可以随着支架上下摆动；拾棉辊筒和输棉绞龙与拾输棉支架相连接；扒棉辊筒、拾棉辊筒、输棉绞龙都是通过液压装置进行驱动,确定了各关键部件的尺寸参数。运用UG NX6.0建立了自动喂棉机三维模型,并且运用NX的运动仿真分析模块对自动喂棉机的扒棉装置和拾输棉装置进行运动仿真。本文通过仿真结果分析,得出自动喂棉机扒棉辊的工作高度5216.86mm、扒棉臂工作时转过的角度为94.83。、喂棉机在前进时可以被抬高146mm。通过对喂棉机扒棉臂的优化分析,得到最优举升位置参数,优化效果明显,符合设计要求。推动扒棉臂的液压缸活塞杆所受到的最大力为54720N、下部液压缸活塞杆所受到的最大力为20900N等。NX运动仿真模块是用于预测工程的应用软件。也就是说,在自动喂棉机被真正生产出来前,该软件可以预测喂棉机的运动特性。这些预测都是基于非常复杂的数学理论及公认的物理和工程原理。基于运动仿真结果可以为喂棉机设计的改进提供理论依据,并且可以缩短设计的周期。更多还原

【Abstract】 The output of Chinese cotton is around500million tons, value of one is750billion yuan or so. More than200million farmers are directly involved in cotton production. The cotton processing industry moves forward a big step from the semi-mechanization to modern mechanization. It is imperative to replace manual operations by mechanized production in the torrent of the development. But most of the cotton processing plants feed seed-cotton with suction tube in XinJiang after artificial picking stack basically. Especially with the advent of efficient cotton gin, artificial feeding cotton has failed to meet the progress and development of the cotton processing industry.In this paper, the inspection and absorption of domestic and foreign data of feeding cotton machinery make it possible to put forward to the overall design, which is a automatic feeding machine used for pulling down cotton, picking cotton, conveying cotton based on the theory of mechanical design and virtual design knowledge. A whole support structure consists of pulling down cotton frame and picking-conveying cotton frame. Pulling down unit includes pulling down cotton frame and pulling down roller. The roller can swing with the frame up and down. Picking up cotton roller and spiral conveyor connect with picking-conveying cotton frame. Pulling down cotton roller, picking cotton roller and spiral conveyor are driven by hydraulic unit. The size parameters of the key parts can be identified. Three-dimensional modeling of automatic feeding cotton is established by UG NX6.0. Then the use of NX Motion Simulation analysis module make motion simulation for pulling down cotton unit and picking-conveying cotton unit of automatic feeding machine.Analysis of simulation results can be obtained. The working height of pulling down cotton roller is5216.86mm, the turning angle of pulling down cotton arm is94.83°, the machine moving forward can be elevated146mm. Hydraulic cylinder piston rod of the pulling down arm can subject to the maximum force54720N, the lower part of the hydraulic cylinder piston rod can subject to the maximum force20900N. Compared the results of the analysis with the previous theoretical calculations, the initial design could meet the requirements.NX Motion Simulation module is used to predict engineering application. In other words, before automatic feeding cotton actually produced, the software can predict movement characteristics. These forecasts are based on very complex mathematical theories and recognized the physical and engineering principles. Motion simulation results can provide a theoretical foundation shorten design cycle.更多还原