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果園混肥器設(shè)計(jì)與數(shù)值模擬分析
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山東省現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系果品產(chǎn)業(yè)創(chuàng)新團(tuán)隊(duì)項(xiàng)目(SDAIT-06-12、SDAIT-06-1)、山東省重大科技創(chuàng)新工程項(xiàng)目(2018CXGC0209)、國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2018YFD0700600)和山東省農(nóng)機(jī)裝備研發(fā)創(chuàng)新計(jì)劃項(xiàng)目(2017YF003)


Design and Numerical Simulation Analysis of Orchard Fertilizer Mixer
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    摘要:

    針對(duì)我國(guó)水資源短缺、水溶性肥料溶解度較低以及灌溉施肥中水肥混合的均勻性問題,設(shè)計(jì)了一種高效混肥器,并利用ANSYS仿真計(jì)算軟件,對(duì)該混肥器的攪拌裝置進(jìn)行模態(tài)和應(yīng)力應(yīng)變仿真分析。同時(shí),基于Fluent模塊對(duì)混肥器攪拌過程的流場(chǎng)、速度場(chǎng)進(jìn)行模擬計(jì)算分析。結(jié)果表明:計(jì)算分析得到攪拌器的安全系數(shù)為11.95,最低階模態(tài)主頻率為19.13Hz,各階頻率遠(yuǎn)大于混肥器的激勵(lì)源頻率,表現(xiàn)出良好的振動(dòng)特性,完全滿足工業(yè)設(shè)計(jì)要求。由分析得到的不同攪拌速度的流場(chǎng)分布圖可知,混肥器在大于臨界攪拌速度的旋轉(zhuǎn)攪拌過程中速度矢量分布較為復(fù)雜,混肥器內(nèi)部產(chǎn)生較多的擾流和湍流,可有效提高混肥效果,同時(shí)發(fā)現(xiàn),轉(zhuǎn)速大于臨界攪拌速度時(shí),攪拌速度的增加對(duì)于混肥器內(nèi)部流場(chǎng)分布的影響較小,最佳攪拌速度為600r/min,此時(shí)在得到良好的攪拌效果的同時(shí)降低了能耗。

    Abstract:

    In view of the shortage of water resources in China, the question of low solubility of water-soluble fertilizers, and the uniformity of water-fertilizer mixing in fertigation, an efficient dynamic fertilizer mixer was designed, and the mixing device of the fertilizer device was simulated by using ANSYS simulation software. The mode and stress strain simulation analysis of the mixer was carried out. At the same time, based on Fluent module, the flow field and velocity field of mixing process of the fertilizer mixer were simulated and analyzed. The results showed that the safety factor was 11.95, the lowest order modal main frequency was 19.13Hz, and each frequency was much larger than the frequency of excitation source of mixed fertilizer. It showed good vibration characteristics and fully met the industrial design requirements. In addition, the distribution diagram of the flow field of different stirring speeds was analyzed. The velocity vector distribution of the mixer was more complex in the rotating stirring process under the rotating speed of the critical agitation speed. It was easy to produce more spoiler and turbulence in the mixer, and can effectively improve the effect of mixing. Meanwhile, the increase of stirringspeed had little effect on the flow field distribution inside the mixer. Finally, the best stirring speed was 600r/min, which reduced the energy consumption while achieving good mixing effect.

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宋月鵬,張帥,李天華,高東升,樊桂菊,王偉.果園混肥器設(shè)計(jì)與數(shù)值模擬分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(s1):181-188. SONG Yuepeng, ZHANG Shuai, LI Tianhua, GAO Dongsheng, FAN Guiju, WANG Wei. Design and Numerical Simulation Analysis of Orchard Fertilizer Mixer[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(s1):181-188.

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  • 收稿日期:2018-07-15
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  • 在線發(fā)布日期: 2018-11-10
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