本文選題：圓草捆打捆機(jī) + 切割器��； 參考：《江蘇大學(xué)》2017年碩士論文

【摘要】：本文針對高留茬稻麥站稈收獲打捆問題,提出了在圓捆機(jī)撿拾器前方配置切割器進(jìn)行切割-撿拾聯(lián)合作業(yè)方案,基于對轉(zhuǎn)雙圓盤刀切割原理設(shè)計(jì)了鏈鋸式和聯(lián)組正反轉(zhuǎn)圓盤刀式切割器及其液壓驅(qū)動系統(tǒng)和掛接機(jī)構(gòu),并對鏈鋸式和聯(lián)組正反轉(zhuǎn)圓盤刀式切割器進(jìn)行切割速度、切割圖等分析以及刀片的有限元分析,開展切割站稈試驗(yàn)。本文的主要研究工作如下:(1)基于對轉(zhuǎn)雙圓盤刀切割原理的鏈鋸式和聯(lián)組正反轉(zhuǎn)圓盤刀式切割器設(shè)計(jì):結(jié)合圓捆機(jī)撿拾器的結(jié)構(gòu)參數(shù)和稻麥站稈的特性以及切割要求,得到了兩種切割器的主要結(jié)構(gòu)參數(shù)和切割運(yùn)動參數(shù)。利用機(jī)構(gòu)學(xué)理論和創(chuàng)新設(shè)計(jì)的方法,基于SolidWorks分別對鏈鋸式切割裝置和聯(lián)組正反轉(zhuǎn)圓盤刀式切割裝置進(jìn)行模型建立。(2)切割裝置的液壓驅(qū)動系統(tǒng)和掛接機(jī)構(gòu)設(shè)計(jì):根據(jù)聯(lián)組正反轉(zhuǎn)圓盤刀式切割器的工作要求和液壓基本回路的功能,設(shè)計(jì)了切割裝置的液壓驅(qū)動系統(tǒng),通過理論計(jì)算,確定了液壓馬達(dá)的轉(zhuǎn)速、排量以及液壓系統(tǒng)總流量、液壓閥的型號等。基于四桿機(jī)構(gòu)原理,設(shè)計(jì)了將聯(lián)組正反轉(zhuǎn)圓盤刀式切割器與圓捆機(jī)撿拾器連接的掛接機(jī)構(gòu),通過控制電動缸推桿伸縮和橫拉桿的輔助支撐,實(shí)現(xiàn)了對切割器位置和姿態(tài)的調(diào)節(jié)。(3)切割器的切割速度和切割圖分析以及刀片的有限元分析:根據(jù)切割器線速度工作要求,確定了鏈刀和圓盤刀的結(jié)構(gòu)參數(shù)。通過切割圖分析了鏈鋸式和圓盤刀式切割器的結(jié)構(gòu)參數(shù)與運(yùn)動參數(shù)對漏割、重割的影響。利用Ansys軟件對鏈刀進(jìn)行靜力學(xué)分析,得到了切割過程中鏈刀的應(yīng)力、應(yīng)變以及位移情況,為鏈刀結(jié)構(gòu)參數(shù)優(yōu)化與加工工藝選擇提供指導(dǎo)。利用Ansys軟件對圓盤刀進(jìn)行模態(tài)分析,得到圓盤刀前6階的固有頻率和主振型,為避免圓盤刀發(fā)生共振的轉(zhuǎn)速確定提供參考。(4)切割站稈試驗(yàn):1)利用設(shè)計(jì)的鏈鋸式切割裝置,對雜草站稈的切割試驗(yàn)表明:當(dāng)鏈刀線速度達(dá)到5 m/s以上時(shí),可以對粗莖硬質(zhì)站稈進(jìn)行有效切割,但是對細(xì)徑軟質(zhì)的切割站稈效果不理想。鏈刀線速度增大到10 m/s,可切割粗莖硬質(zhì)和細(xì)徑軟質(zhì)站稈,但鏈刀式切割器出現(xiàn)卡鏈、跳鏈以及鏈條和導(dǎo)板磨損嚴(yán)重的問題,不宜應(yīng)用于站稈收獲。2)聯(lián)組正反轉(zhuǎn)圓盤刀式切割器的切割站稈試驗(yàn)表明:當(dāng)?shù)侗P轉(zhuǎn)速為1600~1700 r/min,機(jī)器前進(jìn)速度0.2~0.3 m/s時(shí),圓盤刀刀尖線速度21.4~22.7 m/s,漏割率在8.4~8.7%之間,切割器功耗在3.01~3.43 Kw之間,適宜稻麥站稈和雜草切割,最優(yōu)試驗(yàn)組合是刀盤轉(zhuǎn)速為1600 r/min,機(jī)器前進(jìn)速度0.2 m/s。
[Abstract]:In this paper, aiming at the problem of culm harvesting and bundling in high stubble rice and wheat station, a scheme of cutting and picking joint operation with cutter in front of the picker of circular baler is put forward. Based on the cutting principle of double circular disc knife, the chain saw and joint positive and reverse circular disc cutter are designed, and the hydraulic driving system and the hanging mechanism are designed. The cutting speed of chain saw and joint forward and reverse rotating circular disc cutter is also studied. Cutting diagram analysis and blade finite element analysis, cutting station culm test. The main research work of this paper is as follows: (1) based on the principle of double-disc knife cutting, the design of chain saw cutter and joint reverse rotary circular disc cutter: combining the structural parameters of the picker of the circular baler and the characteristics and cutting requirements of the rice and wheat station culms, The main structure parameters and cutting motion parameters of two kinds of cutters are obtained. Using mechanism theory and innovative design methods, Based on SolidWorks, the hydraulic driving system and hanging mechanism design of the chain saw cutting device and the joint group forward and reverse rotary disc cutter are established respectively: according to the work of the joint group forward and inverse rotary disc cutter, the hydraulic drive system and the hanging mechanism of the cutting device are designed. Requirements and basic hydraulic circuit functions, The hydraulic drive system of the cutting device is designed, and the speed, displacement, the total flow rate of the hydraulic system and the type of the hydraulic valve are determined by theoretical calculation. Based on the principle of four-bar mechanism, a hanging mechanism is designed to connect the joint group forward and reverse rotating disc cutter with the circular baler picker, and the auxiliary support of the electric cylinder push rod and the transverse pull rod is controlled by controlling the extension of the electric cylinder push rod and the auxiliary support of the transverse pull rod. The cutting speed and cutting graph of the cutter and the finite element analysis of the blade are realized. According to the requirements of the linear speed of the cutter, the structural parameters of the chain cutter and the disc cutter are determined. The effects of structural parameters and motion parameters of chain saw and disc cutter on the cutting and recutting are analyzed. By using Ansys software, the stress, strain and displacement of the chain cutter are obtained, which provides guidance for the optimization of the structural parameters and the selection of the machining process. The modal analysis of the disc cutter is carried out by using Ansys software, and the natural frequency and the main vibration mode of the first six orders of the disc cutter are obtained. For the determination of the rotational speed of avoiding the resonance of the disc knife, the reference is provided for the determination of the rotational speed of the disc cutter. 4) the culm test of the cutting station: 1) the chain saw cutting device is designed. The experiment of cutting the straw of weed station shows that when the linear speed of the chain cutter is more than 5 m / s, the hard stem of coarse stem can be cut effectively, but the effect of cutting station stem with fine diameter and soft material is not ideal. The linear speed of the chain cutter is increased to 10 m / s, which can cut the hard stem and the soft stem of the fine diameter, but the chain cutter has the problem of chain clamping, jumping chain and serious wear of the chain and guide plate. It is not suitable to be used in culm harvesting. 2) the cutting station culm test of the cutting tool with positive and reverse rotating disc type cutter shows that when the rotating speed of the cutter head is 1 600 ~ 1 700 r / min and the advance speed of the machine is 0. 2 ~ 0. 3 m / s, the linear speed of the disc cutter tip is 21. 4 ~ 20. 7 mm / s, and the missing cutting rate is between 8. 48.7% and 8. 48.7%. The power consumption of the cutter is between 3.01 and 3.43 Kw, which is suitable for straw and weed cutting in rice and wheat stations. The optimal experimental combination is that the speed of the cutter head is 1600 r / min, and the advance speed of the machine is 0.2 m / s.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S225

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