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基于TRIZ理論的種子玉米剝皮機(jī)構(gòu)設(shè)計與試驗
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國家自然科學(xué)基金項目(51805536)和江蘇省農(nóng)業(yè)科技自主創(chuàng)新項目(CX(20)3061)


Design and Experiment of Seed Corn Peeling Mechanism Based on TRIZ Theory
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    摘要:

    與大田玉米剝皮作業(yè)相比,種子玉米剝皮對苞葉剝凈率、籽粒破碎率和落粒率具有較高的農(nóng)藝要求。針對種子玉米缺乏高效低損的剝皮手段問題,采用TRIZ理論聯(lián)合顯式動力學(xué)仿真與高速攝像技術(shù)開展了種子玉米剝皮機(jī)構(gòu)設(shè)計方法研究。首先,基于TRIZ理論解決了種子玉米剝皮機(jī)構(gòu)關(guān)鍵結(jié)構(gòu)設(shè)計問題,并完成了剝皮機(jī)構(gòu)的詳細(xì)設(shè)計;其次,利用LS-DYNA進(jìn)行了剝皮系統(tǒng)-種子玉米果穗的顯式動力學(xué)仿真,分析種子玉米果穗運(yùn)動過程及受力情況,驗證了剝皮機(jī)構(gòu)設(shè)計的合理性;搭建了高速攝像試驗臺,通過對種子玉米剝皮過程高速攝像的逐幀分析,并與仿真結(jié)果相比,得出3種工況下速度最大誤差分別為0.035、0.066、0.095m/s,驗證了剝皮輥分段設(shè)計的合理性;最后選擇苞葉剝凈率、籽粒破碎率及落粒率為性能指標(biāo)開展了種子玉米剝皮試驗,在3種工況下,試驗結(jié)果滿足種子玉米剝皮機(jī)構(gòu)的性能指標(biāo)要求。

    Abstract:

    Compared with field corn, seed corn peeling operation has higher agronomic requirements on the bracts peeling rate, grains crushing rate, and grains falling rate. Because of the lack of efficient and low-loss peeling means for seed corn ear, TRIZ theory combined with explicit dynamics simulation and high-speed camera technology was used to study the design method of seed corn peeling mechanism. Firstly, based on TRIZ theory, the critical structural design of the seed corn peeling mechanism was solved, and the detailed design of the peeling mechanism was completed. Secondly, LS-DYNA was used to simulate the explicit dynamics of the peeling system-seed corn ears. The movement process and stress of seed corn ears were analyzed, which verified the rationality of the peeling mechanism design. In addition, a high-speed camera test-bed was set up. Through the frame-by-frame analysis of a high-speed camera in the peeling process of seed corn and compared with the simulation results, the maximum error of speed under three working conditions was 0.035m/s, 0.066m/s and 0.095m/s, respectively, which verified the rationality of the sectional design of peeling roller. Finally, the seed corn peeling experiment was carried out by selecting the net rate of bract leaf peeling, the rate of grain breaking and the rate of falling grains as performance indexes. Under three working conditions, the test results met the performance index requirements of the seed corn peeling mechanism.

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劉磊,劉理漢,杜岳峰,毛恩榮,張延安,楊帆.基于TRIZ理論的種子玉米剝皮機(jī)構(gòu)設(shè)計與試驗[J].農(nóng)業(yè)機(jī)械學(xué)報,2022,53(9):131-141. LIU Lei, LIU Lihan, DU Yuefeng, MAO Enrong, ZHANG Yan’an, YANG Fan. Design and Experiment of Seed Corn Peeling Mechanism Based on TRIZ Theory[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(9):131-141.

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  • 收稿日期:2021-09-29
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  • 在線發(fā)布日期: 2022-09-10
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