小型谷物清选机论文

毕业设计(论文)题目：小型谷物清选机设计学院：农业工程与食品科学学院专业：机械设计姓名：XXx学号：XXX指导教师：XXX毕业设计（论文）时间：二О一О年三月一日～六月十八日共十七周摘要I摘要谷物清选机械目前国内己经基本上能够自给自足，但是由于市场上大部分都是种子加工成套设备，由于其价格高，能耗大，还不能完全适应小型种子生产和经营部门的要求。因此，开发符合我国国情的谷物清选机械，对提高我国种子产品质量、农业经济效益和农业生产现代化水平具有重要意义。论文立足国情，基于我国不同类型种子生产和经营部门的经济和技术水平，研制开发一种实用性强、市场前景好的小型谷物清选机械。本文在介绍国内外种子加工机械的发展现状与动态的基础上，分析了研制价格低、操作简单、使用方便的小型谷物清选机的意义和市场需求，制定了系统总体设计方案，对系统的机架、筛体、振动机构、风机进行了重点研究设计。该小型谷物清选机采用单相220伏交流电源供电，使用非常方便，而且节约能源，动力只需1.5kw。机架设计为车驾式，整机可框在地排车下盘上，移动方便。进料装置采用了结构简单的顶置式人力提升装置，采用插板活门控制流量，其结构简单，操作方便，喂料均匀。筛体的上筛采用圆孔平面筛、下筛采用编织筛，提高了生产率，而且对粗混杂物及小谷粒有较高的分离率。传动机构采用三角带传动，传动平稳，结构尺寸小。振动机构采用曲柄连杆机构，平稳可靠有效。清选风机采用低压后向直叶片离心式风机。在整机设计过程中充分考虑到性价比，选用价格低、性能稳定的零部件。关键词:清选机，单相电源，平面筛，曲柄连杆传动机构,风筛式AbstractIIAbstractAtpresent,thegraincleanercanbebasicallyalreadyself-sufi}cientathome.Butthemostpartisthecompletesetsseed-processingequipment,anditshighprice,heavyweightandhighenergyconsumptioncan'tmeetthedemandofthesmall-sizeseedproducingandrunningdepartment.Therefore,developingthegraincleanerwhichaccordswithofournationalconditionshasgreatsignificancetoimproveseedquality,agriculturaleconomicbenefitsandagriculturalmodernization.Accordingtotheeconomyofthedepartmentandengineeringlevelofthedifferentkindsofseedsofourcountry,thethesisbasesonthenationalconditionsandwehaveexploitedthesmall-sizegaincleanerwhichhasstrongpracticabilityandgoodmarketprospects.Basedonintroducingthestates-of-artoftheseedprocessingequipmentathomeandabroad,thesignificanceandmarketdemandofthesmall-sizegraincleanerwhichiseasytooperate,convenienttouseandhasthelowpriceareanalysed.Havingmadetheoveralldesignplanofthesystem,theframework,vibrosieve,vibratingmechanismandthecentrifugalfanofthesystemaremainlyresearchedanddesigned.Thissmall-sizegaincleanerisadoptedsingle-phase220voltstosupplypoweranditisveryconvenienttouse,economizetheenergyandmotiveforceonlyneed1.SkwTheframeworkisdesignedforthethill.Themachineisfixedtheunderwallofthevehicleanditisconvenienttomove.Thefeedingdeviceisadoptedtheoverheadmenhoistingdeviceandusedflashboardvalvetocontroltheflow.Itisofsimplestructure,easytooperateandeventofeedthematerial.Thetopsieveofthevibrosieveisadoptedround-holeprissyscreenandround-holeplansifterofthelowersieve.Thethickimpurityandsmallvalleyhavethehigherrateofthegrainseparation.Becausetheverticalarrisofthetrianglehasincreasedthepossibilityofthedirectedmovementofthetinyandhavepromotedthelowerfloorofthevalleytopassseparationprocesswhichsiftsthehole.Apartofthesieveholeisthesideofthearris,whichnotonlyformsthegrooveinthebottomsurface,butalsohasincreasedeffectiveareaofsievehole.Atthesametime,itdoesnotproducetherestrictiontothedirectedmovementofthevalley.Transmissionorganizationareadoptedtriangularbelttodrivewhichhassteadytransmissionandlittlephysicaldimension.ThebeltwheelhasbeentakentheAbstractIIIsolidwheel.Thevibratingmechanismisadoptedtheeccentricbearinglinkmechanism.Theeccentricbearingisastandardcomponentwhichnotonlysimplifiedtheprocessingconnecting,butalsoreducedthefrictionaldissipation.Itisadoptedthehypopiesia,backward,prismaticbladecentrifugalfan.themethodofadjustingtheareaoftheinletopeningtoadjusttheinputair.Duringthewholedesignprocess,choosingthelowperformanceforusearesufficientlyconsidered.Throughpricewithsteadyn}nningtest,resultofthetestanddesigningrequirementareunanimousbasically,systemhasbettereconomicbenefitsandsocialbenefit.Keyword:small-sizegraincleaner，single-phaseelectricpowersupply，round-holeprissyscreen，eccentricbearinglinkmechanism,energy-saving目录IV目录摘要..............................................................................................................................................IAbstract.........................................................................................................................................II目录............................................................................................................................................IV第一章概述.....................................................................................................................................11.1课题研究的目的及意义...................................................................................................11.1.1课题研究的目的....................................................................................................11.1.2课题研究的意义....................................................................................................11.2国内外研究现状...............................................................................................................21.2.1国内研究水平........................................................................................................21.3.1研究内容................................................................................................................51.3.2技术指标................................................................................................................51.4研究方法和技术路线........................................................................................................61.4.1研究方法..................................