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1、西南農(nóng)業(yè)大學(xué)碩士學(xué)位論文包衣稻種物理機(jī)械特性試驗(yàn)與應(yīng)用研究姓名:楊明金申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):農(nóng)業(yè)機(jī)械化工程指導(dǎo)教師:李慶東20000201摘要包衣稻種用于工廠(chǎng)化育秧是一項(xiàng)創(chuàng)新。穴盤(pán)精密播種是工廠(chǎng)化育秧關(guān)鍵環(huán)節(jié)之一。包衣稻種有利于穴盤(pán)精密播種,它的物理機(jī)械特性是研制基于包衣稻種的穴盤(pán)精密播種機(jī)械的基礎(chǔ)數(shù)據(jù),這些特性包括稻種尺寸、容積密度、粒子密度、孔隙率、自然休止角、靜摩擦系數(shù)、動(dòng)摩擦系數(shù)、自流角、飄浮系數(shù)和恢復(fù)系數(shù)等。采用正交試驗(yàn)設(shè)計(jì)方法對(duì)包衣稻種物理機(jī)械特性進(jìn)行試驗(yàn)研究,找到了影響包衣稻種物理機(jī)械特性的主要因素及因素影響的顯著性程度,建立起含水率等指標(biāo)與
2、包衣稻種物理機(jī)械特性之間的回歸方程,其相關(guān)系數(shù)較高。試驗(yàn)表明,含水率對(duì)包衣稻種物理機(jī)械特性影響較大,隨著含水率的增大,稻種厚度、容積密度、自然休止角、靜摩擦系數(shù)、動(dòng)摩擦系數(shù)和自流角增大,粒子密度、孔隙率、飄浮系數(shù)和恢復(fù)系數(shù)減??;稻種包衣使稻種物理機(jī)械特性和襲面特性有一定的改變,包衣稻種更適予精密播種機(jī)的排種。試驗(yàn)結(jié)果給出了包衣稻種具體的物理機(jī)械特性參數(shù)值,為基于包衣稻種的電磁振動(dòng)式排種器和氣吸式排種器的參數(shù)設(shè)計(jì)和性能分析提供了依據(jù)卜,,l。,\,√,關(guān)鍵詞:包衣稻種物理機(jī)械特性試驗(yàn)分析應(yīng)辯研究ExperimentalandAppliedResearchonP
3、hysicalandMechanicalPropertiesofCoatedRiceSeedAbstractThefactoryseedlingnurseryforriceseedling,coatedriceseedused,isanewtmil.Dibbleprecisiondrillingisoneofthekeylinksofthefactoryseedlingnursery.Thephysicalandmechanicalpropertiesofcoatedriceseedbeneficialtothedibbleprecisiondrilling
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8、wheocoatedchangesitsphysicalandmechanicalpropertiesantisurFil(!echatacters,whichcanimprovedrillingqualityofprecisionseeder.’rheexperimentsresultinsomespecificdatumofthepropertieswhichcanprovidebasisforpa,ameterdesignsandperformanceanalysisonelectromagneticvibration—typeandsuction—t
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