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氣送式高速玉米精量排種器導(dǎo)流渦輪設(shè)計與試驗
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國家重點研發(fā)計劃項目（2017YFD0700703）、國家自然科學(xué)基金項目（51575515）和國家玉米產(chǎn)業(yè)技術(shù)體系建設(shè)項目（CARS-02）


Design and Experiment of Diversion Turbine of Air-assisted High Speed Maize Precision Seed Metering Device
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    摘要:

    為了提高氣送式高速玉米精量排種器的工作性能，設(shè)計了3種結(jié)構(gòu)類型的導(dǎo)流渦輪,，通過計算流體力學(xué)(Computational fluid dynamic, CFD)方法模擬仿真與理論分析得出，導(dǎo)流渦輪可有效提高排種器內(nèi)部空氣的流動性,，增大外圈型孔處空氣流速流量，增大壓覆作用力,，且具有較大迎風(fēng)角和具備曲線結(jié)構(gòu)的導(dǎo)流渦輪C具有較好的擾動性和導(dǎo)流性,，效果最佳。為了獲得安裝有導(dǎo)流渦輪C排種器的最佳性能參數(shù),，以工作速度,、種子喂入量和氣送風(fēng)壓為試驗因素，以合格指數(shù),、漏播指數(shù)和重播指數(shù)為試驗指標(biāo)進(jìn)行三元二次回歸正交旋轉(zhuǎn)組合試驗,，并應(yīng)用Design-Expert 8.0.6軟件對試驗數(shù)據(jù)進(jìn)行多元回歸分析和響應(yīng)曲面分析，得到了各因素對指標(biāo)的影響關(guān)系,。采用多目標(biāo)優(yōu)化方法,，確定最佳參數(shù)組合為：工作速度為9.8km/h、種子喂入量為1.8kg/min,、氣送風(fēng)壓為8kPa,。此時,，排種器合格指數(shù)最高，其性能指標(biāo)為合格指數(shù)91.32%,、漏播指數(shù)2.83%,、重播指數(shù)5.85%。對優(yōu)化結(jié)果進(jìn)行對比驗證試驗,，在相同條件下與未安裝導(dǎo)流渦輪的排種器進(jìn)行對比表明,，安裝導(dǎo)流渦輪可以有效提高排種器工作性能。

    Abstract:

    In order to make the flow field distributed orderly in the air-assisted high speed maize precision seed metering device, thereby improving the working performance of the seed metering device, three kinds of structure type diversion turbine were designed. Through the simulation and theoretical analysis of CFD method, the diversion turbine can effectively improve the air flow inside the seeding device and increase air speed where type hole in outer ring. At the air flow rate, the pressing force was increased, and the C diversion turbine with a large windward angle and a curved structure had better disturbance and guiding, and the effect was optimal. In order to obtain the best performance parameters of the C diversion turbine installed, the operation velocity, quantity of feeding and wind pressure were used as test factors, and the qualified index, the missing index and the multiple index were used as test indicators. A three-factor quadratic rotation orthogonal combination test was performed and the multiple regression analysis and response surface analysis of the test data were carried out by Design-Expert 8.0.6 software, and the influence of various factors on the indicators was obtained. The multi-objective optimization method was used to determine the optimal combination of parameters: the operation velocity was 9.8km/h, the quantity of feeding was 1.8kg/min, and wind pressure was 8kPa and the qualified index of seed metering was the highest. At this time, the qualified index was 91.32%, the missing index was 2.83%, and the multiple index was 5.85%. The comparison verification test was carried out on the optimization results, and the comparison was made under the same conditions with the uninstalled diversion turbine seed metering device, and it was found that the installation of the diversion turbine can effectively improve the working performance of the seed metering device.

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高筱鈞,徐楊,賀小偉,張東興,楊麗,崔濤.氣送式高速玉米精量排種器導(dǎo)流渦輪設(shè)計與試驗[J].農(nóng)業(yè)機(jī)械學(xué)報,2019,50(11):42-52. GAO Xiaojun, XU Yang, HE Xiaowei, ZHANG Dongxing, YANG Li, CUI Tao. Design and Experiment of Diversion Turbine of Air-assisted High Speed Maize Precision Seed Metering Device[J]. Transactions of the Chinese Society for Agricultural Machinery,2019,50(11):42-52.

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  • 收稿日期:2019-04-22
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  • 在線發(fā)布日期: 2019-11-10
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