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1、山東理工大學(xué)碩士學(xué)位論文穴盤(pán)育苗精量播種裝置理論及試驗(yàn)研究姓名:周曉峰申請(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:胡敦俊20040401蘭查矍三奎耋堡圭蘭堡絲蘭絲薹摘要我國(guó)是一個(gè)農(nóng)業(yè)大國(guó),農(nóng)業(yè)生產(chǎn)在國(guó)民經(jīng)濟(jì)中占有重要地位。隨著我國(guó)經(jīng)濟(jì)的高速發(fā)展和人民生活水平的日益提高,舊的農(nóng)業(yè)生產(chǎn)方式已經(jīng)不能滿足經(jīng)濟(jì)和社會(huì)發(fā)展的需要。在這種情況下,工廠化高效農(nóng)業(yè)成為我國(guó)農(nóng)業(yè)生產(chǎn)的必由之路。工廠化育苗是實(shí)現(xiàn)工廠化高效農(nóng)業(yè)的一個(gè)基礎(chǔ)環(huán)節(jié)。研制符合我國(guó)國(guó)情的工廠化育苗精量播種裝置成為我國(guó)農(nóng)業(yè)發(fā)展的當(dāng)務(wù)之急。本文就氣吸式穴盤(pán)育苗精量播種裝置的有關(guān)機(jī)理進(jìn)行了理論分析和試驗(yàn)研究。將種子的運(yùn)動(dòng)過(guò)程
2、分成在種子盤(pán)中振動(dòng)、被吸嘴吸附前和吸附后三個(gè)階段進(jìn)行理論分析,建立了吸嘴前種子在氣流作用下的受力模型,得出了氣吸式排種器的工作原理,給出了種子被吸附的條件,分析了臨界狀態(tài)下影響吸種過(guò)程的各因素之間的關(guān)系。通過(guò)種子盤(pán)的振動(dòng)分析,得出種子盤(pán)上、被吸嘴吸附前和吸附后的運(yùn)動(dòng)過(guò)程以及運(yùn)動(dòng)參數(shù)的變化曲線。用于評(píng)價(jià)播種質(zhì)量的指標(biāo)主要有單粒率、空穴率和重播率。通過(guò)正交試驗(yàn)和二次回歸正交試驗(yàn),得出吸嘴直徑、氣室真空度和工作頻率三個(gè)因素影響播種質(zhì)量的主次順序和較優(yōu)組合,給出了單粒率、空穴率和重播率三個(gè)性能指標(biāo)隨各因素的變化曲線。關(guān)鍵詞:穴盤(pán)、育苗、氣吸、精量、播種機(jī)山東理工大學(xué)碩士學(xué)位論文A
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