【摘要】：針對(duì)目前現(xiàn)有的煙稈拔取裝置體積結(jié)構(gòu)較大、功能單一、聯(lián)合作業(yè)及對(duì)南方煙區(qū)地形地貌適應(yīng)性不強(qiáng)等問題,研究設(shè)計(jì)了一種結(jié)構(gòu)緊湊、操作方便、聯(lián)合作業(yè)較強(qiáng)、適合南方煙區(qū)的煙草拔稈切蔸裝置。該裝置是實(shí)現(xiàn)南方煙草生產(chǎn)全程機(jī)械化的重要組成部分,對(duì)提高生產(chǎn)效率、降低勞動(dòng)強(qiáng)度及成本具有重要意義。本文對(duì)南方煙區(qū)地形地貌、煙草種植農(nóng)藝要求進(jìn)行了研究,對(duì)成熟期的煙稈物理力學(xué)特性進(jìn)行了測(cè)量與測(cè)試,得出了其平均高度、直徑、質(zhì)量、夾持部位平均直徑、切蔸部位平均直徑、煙稈夾持部位軸向拉斷力與抗拉強(qiáng)度、煙稈夾持部位徑向壓潰力與抗壓強(qiáng)度、煙稈切蔸部位彎曲力與彎曲強(qiáng)度及煙稈與鋼的摩擦系數(shù)。提出了夾持拉拔與切割相結(jié)合的拔稈切蔸方案,并用PRO/E軟件建立了虛擬樣機(jī)模型,對(duì)其關(guān)鍵部件的結(jié)構(gòu)進(jìn)行了設(shè)計(jì)計(jì)算,同時(shí)建立了裝置在拔稈切蔸過程中的運(yùn)動(dòng)學(xué)與動(dòng)力學(xué)模型。本文利用ADAMS軟件建立了煙稈-拔稈切蔸裝置虛擬樣機(jī)模型,對(duì)煙稈夾持拔取與切蔸過程進(jìn)行了物流過程虛擬試驗(yàn)分析,得到了裝置在虛擬作業(yè)過程中,煙稈夾持點(diǎn)位移、速度、加速度、煙稈夾持力的變化特征及圓鋸切刀刀刃位移、速度、加速度、動(dòng)靜軌跡變化規(guī)律,得到了圓鋸切刀在切蔸過程中與煙稈切割作用力的變化規(guī)律。通過前期試驗(yàn)驗(yàn)證,對(duì)拔稈切蔸裝置發(fā)現(xiàn)的問題進(jìn)行了改進(jìn)。在改進(jìn)的基礎(chǔ)上進(jìn)行單因素與多因素正交試驗(yàn),確定了影響裝置拔稈切蔸效果的各因素水平的最優(yōu)組合,即雙排夾持輸送鏈速度為0.8m/s、機(jī)器前進(jìn)速度為0.6m/s、夾持間隙為12mmm時(shí),煙稈拔稈切蔸效果最佳。
[Abstract]:Aiming at the problems of large volume structure, single function, combined operation and weak adaptability to topography and geomorphology of the existing tobacco culm extraction device, a compact structure, convenient operation and strong joint operation are studied and designed. Tobacco stalk cutting plant suitable for southern tobacco area. The device is an important part of realizing the whole process mechanization of tobacco production in southern China. It is of great significance to improve the production efficiency and reduce the labor intensity and cost. In this paper, the topographic features and agronomic requirements of tobacco planting in southern tobacco region were studied, and the physical and mechanical properties of tobacco stalk in mature stage were measured and tested. The average height, diameter, mass and mean diameter of holding position were obtained. The mean diameters of the stump, the axial tensile force and tensile strength of the tobacco stalk holding position, the radial crushing force and the compressive strength of the tobacco stalk clamping part, the bending force and the bending strength of the tobacco stalk cutting stump and the friction coefficient between the tobacco stalk and steel. The scheme of culm cutting with clamping drawing and cutting is put forward, and the virtual prototype model is established with PRO/E software, and the structure of its key components is designed and calculated. At the same time, the kinematics and dynamics model of the device in the process of culm cutting was established. In this paper, the virtual prototype model of tobacco-culm-cutting plant was established by using ADAMS software, and the virtual test of the process of culm pulling and stump cutting was carried out, and the displacement and speed of the holding point of tobacco culm in the process of virtual operation were obtained. The variation characteristics of the acceleration, the holding force of tobacco stalk and the displacement, velocity, acceleration, dynamic and static track of the cutting edge of the circular sawing cutter are obtained, and the variation law of the cutting force between the circular saw cutter and the tobacco stalk in the process of cutting the stalk is obtained. The problems found in the plant of culm cutting and stump cutting were improved through early test and verification. On the basis of the improvement, the orthogonal experiment of single factor and multi-factor was carried out, and the optimum combination of factors affecting the effect of culm cutting was determined, that is, the speed of double row gripping transport chain was 0.8m / s, the speed of machine advance was 0.6m / s, When the holding gap was 12mmm, the best cutting effect was obtained when culm was pulled out.
【學(xué)位授予單位】：湖南農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S225.99

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1 楊彪;煙草拔稈機(jī)拔稈切蔸裝置試驗(yàn)研究[D];湖南農(nóng)業(yè)大學(xué);2015年

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本文編號(hào)：2327441