玉米精播機圓管式氣吸排種裝置試驗研究.pdf

1、河北農(nóng)業(yè)大學碩士學位論文玉米精播機圓管式氣吸排種裝置試驗研究姓名：孫松濤申請學位級別：碩士專業(yè)：農(nóng)業(yè)機械化工程指導教師：張晉國史智興20080608ResearchoftheCylindricalTubeAirSuctionSeedMeteringDeviceforCornPrecisionSeederAuthor：SunSongtaoTutor：ZhangJinguoShiZhixingSpecialty：Agriculturalme

2、chanizationengineeringAbstractAsthemostimportantgrainandgrasscrop，corntakesanimportantroleinthedevelopmentofnationaleconomyThecornoutputofOUrcountryaccountsforabove224％ofthatoftheworld，andtheplantingareaandthetotaloutput

3、occupythesecondint11eworldAtpresenttheagricultureofourcountryisfacingthehistoricalperiodofthetransformformthetraditionalagriculturetothemodemagriculture’andthemechanizationofthecornplanterisallimportantconstituentThemech

4、anizationtechnologyofthecornprecisionplantingisthecombinationoftheagronomyandthemodemsciencetechnologyofthefarmmachineryandhasbeenwidelyusedathomeandabroadTheseedingdeviceisthecorepartoftheprecisionseederwhichdeterminest

5、heperformanceofseedingHowtoenhancetheworkingperformanceoftheprecisionseedingmechanismhasbeenthekeypointanddifficultyofresearchprojectsathomeandabroadTheairsuctionmeteringdeviceiSanadvancedseedingdevice，whichismainlyusedi

6、ntheseedingofthetilledcropandhasbeenwidelyusedathomeandabroadbyitsuniqueadvantage1]∞spaperpresentsacylindricaltubeairsuctionseedmeteringdeviceadaptedforcorn，introducesitsstructureandprinciple，anddoesmassiveexperimentalst

7、udyonsowingseedsTllispaperhascarriedondynamicanalysisontheseedadsorptionbyseedingdevice，dividedtheseedsowingdeviceintothefillingseedareaandtakingseedarea，analyzedtheforceinthetwoareasaimingattheirdifferentfunctions，broug

8、htforwardtheconditionoftheseedsabsorptionofthesuctionhole，andobtainedthevacuumdegreerequiredbyseedsabsorptionandmovementfollowedbyitatcriticalconditionThispaperhasobtainedthefactorsthataffectthereliabilityoftheseedssucti

9、onarcvacuumdegree，rotationalspeed，suctionarea，andseedcharacteristicsetcbvtheresultsoftheanalysisoftheforceoftheseedsInordertoimprovetheroundtubeairsuctionmeteringdevice’Sfunction，andfindoutthekeyfactorsthataffectperforma

10、nce，thispapermeasuresthesowingseedfunctionaccordingtothecountryGB697386Attheexperimentplatformofseedsowingdevice，thispaperproceededthecontrastexperimentsbychangingdifferentparametersoftheseedsowingdeviceThroughtheseexper