微波干燥蠶繭試驗裝置的設計與研究.pdf

1、西南大學碩士學位論文微波干燥蠶繭試驗裝置的設計與研究姓名：吳海濤申請學位級別：碩士專業(yè)：農(nóng)業(yè)機械化工程指導教師：何培祥梁列峰20060501西南人學砸jj學位論叟AbsI姐ctABSTRACTIthasastrongseasonalharvestofsilkcocoonsSotimelypupakillinganddryinghandlingareaskedforthepostharvestfreshcocoonsTraditional

2、cocoon’sbakingmethodscyclearelong，whileithavelowproductivityanddifficulttocontrol，therefore，itisgraduallyfailtoadapttheproductivegrowingneedsanddevelopingrequirementsConstructionofthesilkcocoonsisspecial，thecocoonlayersu

3、rroundchrysalisbodybutthecocoonlayer’smoisturecontentislowandpupabodyiswetThemainpurposeofcocoonchrysalisdryingistemovetheredundantwaterfromsilkwormbodyCurrentlythecourseofhotairdryingismuchtimeconsumingusuallycostabout5

4、hoursandthethermalefficiencyislowHoweverthemicrowavesilkdryingmethodcangreatlyshortenthedryingtimewhilewithoutreducingofthequalityofsilkCOcoonsBecausetherateofwatercontainofcocoonchrysalisbodyisupto82％initsinternallayer，

5、andthechrysalisbody’ssurfacehasgotseveralDqualityframes，soitimpedetheevaporationofwaterTheresultofthesituationischrysalisbody’sexcessivepressureanditleadingtothephenomenonof”spraydetonation”anddyecocoonTherefore，itisnece

6、ssarytostudytowardsthewaythatpowderadjustmentofmicrowavedryingsystemTherearetwokindsofwaystoadopttothemicrowavepoweratpresentLastworkintermittencebyway，beworkedintheformofpulsatemagnetron，opencomparedwiththetimetoshutoff

7、lastworkmagnetronthan，itisatworkbeenaverageforelectriccurrentinandmagnetronfordirectradiothan，socarlthroughcontrollingbythenotturningonlasttimeofmagnetron，andthencontrolandchangingtheoutputsizeoftheaveragepowerAtpresentt

8、hewaywhichusesregardingthemicrowavepowerregulationhastwokindsOneistheintermittence—typeadjustpowerwayanotherkindisthecontinuous—typeadjustpowerwayTheintermittencetypeadjustpowerwaythemagnetronisbythepulsationformwork，thr

9、oughcontrolsthemagnetrontoopenbreaksthetime，thencontrolandchangingtheoutputsizeoftheaveragepowerThecontinuoustypeadjuststhemeritwayisthroughthefineadjustmentanodevoltagethusthechangeandthestableoutputsizeThepresentpapers

10、eparatelydesignedthecontinuoustypetoadjustthemeritandtheintermittenttypeadjuststhemeritthemicrowavetodrytheCOCOOntestequipment，theintermittence。likeaccentmeritsystemhasmadetheimprovementtothetraditionalmicrowaveovenaccen

11、tmeritway，itoperatedsimplythepowerregulationscopewasbiggerthantheexistingmicrowaveoven，itsshortcomingwasthepowerregulationnotcontinuouslythepoweroutputhadth。pulsationwasdryingtheCOCOOnprocesstheinitialperiodstillnottobea