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聯(lián)合收獲機風篩式清選裝置清選室內渦流試驗
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Analysis on the Eddy Current of the Air-and-screen Cleaning Device
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    摘要:

    在DFQX-3型物料清選試驗臺上，采用數(shù)字風速儀測得清選室內多點風速，利用繪制等速線的方法得出氣流流速為零的點（渦心）。通過分析離心風機轉速和出風口傾角對渦心位置的影響，得出在離心風機不同出風口傾角下風機轉速與渦心位置變化關系，以及不同風機轉速下出風口傾角對渦心位置變化的影響規(guī)律。通過水稻清選試驗對比分析表明，渦心位置變化對清選的清潔率和損失率有較大影響，并得到離心風機轉速為950r/min且出風口傾角為25°時，清選效果最佳。

    Abstract:

    Zero point of airflow velocity which is the heart of eddy current was found by drawing equal lines and measuring wind speed values of multipoint with digital screen anemometer on the DFQX〖CD*2〗3 material clearing and simulation test platform. Based on analyzing the effect of eddy current by the speed or angle of the centrifugal fan, both the law of the centre of eddy current was affected by changing the angle of the centrifugal fan at the same speed of the centrifugal fan and the centre of eddy current was also affected by changing the speed of the centrifugal fan at the same angle of the centrifugal fan. The results of grain cleaning test showed that the cleaning rate and lose rate were affected by changing the centre of the centrifugal fan. The best results of cleaning grain were that the speed and angle of eddy current were 950r/min and 25°, respectively.

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唐 忠,李耀明,李洪昌,徐立章,趙 湛.聯(lián)合收獲機風篩式清選裝置清選室內渦流試驗[J].農業(yè)機械學報,2010,41(12):62-66. Tang Zhong, Li Yaoming, Li Hongchang, Xu Lizhang, Zhao Zhan. Analysis on the Eddy Current of the Air-and-screen Cleaning Device[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(12):62-66.

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