本文選題：日糧混合機　切入點：回轉(zhuǎn)式　出處：《農(nóng)業(yè)機械學報》2017年08期

【摘要】：針對我國日糧混合機機理研究及自主設(shè)計不足的問題,結(jié)合我國畜牧業(yè)發(fā)展的實際需要,設(shè)計了一種在筒體內(nèi)壁安裝抄板的回轉(zhuǎn)式日糧混合機,實現(xiàn)日糧的均勻混合。為揭示其混合機理,利用回轉(zhuǎn)式日糧混合試驗裝置,借助高速攝像技術(shù)對其混合過程進行了觀察和分析,結(jié)果可知:按筒體內(nèi)物料顆粒群運動特征可將物料分布區(qū)域劃分為提料區(qū)、拋落區(qū)、回料區(qū),其中拋落區(qū)是主混合區(qū),其物料以剪切混合為主、以擴散與對流混合為輔,且各個區(qū)域的位置、大小、形狀受結(jié)構(gòu)和運行參數(shù)的影響很大;同時,以筒體轉(zhuǎn)速、物料裝載率、混合時間、抄板安裝角和抄板高度為試驗因素,以變異系數(shù)、凈功耗為評價指標,采用五因素五水平(1/2部分實施)正交旋轉(zhuǎn)組合試驗方法進行了性能優(yōu)化試驗,并確定其最佳參數(shù)組合為:筒體轉(zhuǎn)速23.5 r/min、物料裝載率65%、混合時間4 min、抄板安裝角11°、抄板高度109 mm,此時變異系數(shù)、凈功耗分別為2.09%、33.734 kJ,比優(yōu)化前分別降低了64.4%和15.1%。
[Abstract]:In view of the insufficient research on the mechanism and independent design of the ration mixer in our country and the actual needs of the development of animal husbandry in China, a rotary type ration mixer was designed, which was mounted on the inner wall of the barrel, and realized the uniform mixing of the ration.In order to reveal its mixing mechanism, the mixing process was observed and analyzed with the help of high speed camera technology.The results show that according to the movement characteristics of particle group in the cylinder, the distribution area of the material can be divided into three areas: the material extraction area, the drop area and the return zone, in which the main mixing zone is the drop zone, the shearing mixing is the main area, and the diffusion and convection mixing is the secondary area.The location, size and shape of each region are greatly affected by the structure and operation parameters, and the variation coefficient is taken as the test factors, such as the rotating speed of the cylinder, the loading rate of the material, the mixing time, the mounting angle of the plate and the height of the plate.The net power consumption is used as the evaluation index, and the performance optimization test is carried out by using the orthogonal rotation combination test method, which is implemented by five factors and five levels / one / two parts.The optimum parameters were determined as follows: rotating speed 23.5 rmin, loading rate 65, mixing time 4 min, mounting angle 11 擄and height 109 mm. The coefficient of variation and net power consumption were 2.09 and 33.734 kJ, respectively, which were 64.4% and 15.1kJ lower than those before optimization.
【作者單位】： 東北農(nóng)業(yè)大學工程學院;
【基金】：國家重點研發(fā)計劃項目(2016YFD0701300) 國家自然科學基金項目(51405076)
【分類號】：S817.124

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1 沈增發(fā);;回轉(zhuǎn)式凍結(jié)機[J];漁業(yè)現(xiàn)代化;1979年01期

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本文編號：1718726