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題名 | 軸流式玉米脫粒機脫粒損傷之基礎研究 |
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作者 | 奚永明; 吳中興; | 書刊名 | 農業工程學報 |
卷期 | 33:4 1987.12[民76.12] |
頁次 | 頁54-61 |
分類號 | 434.251 |
關鍵詞 | 玉米; 脫粒機; 軸流式; |
語文 | 中文(Chinese) |
中文摘要 | 本研究針對國內現有玉米脫粒機常用之軸流式脫粒機構所造成之脫粒損傷進行基礎研究,研究主題包含有:1.影響脫粒損傷之機械因子之探討,2.沿脫粒軸向脫粒率之分佈情形,3.以一套損傷分類標準判別連軸損傷與離軸損傷受機械及作物因子之影響情形,4.玉米粒與穗軸結合之分離力之大小與含水率之關係。研究結果顯示,連軸損傷與離軸損傷約成3比5之分佈。有近半數(45%~50%)的玉米粒在進入脫粒筒後的前半段就被脫下,而且在低含水率時,沿脫粒軸向各區段的脫粒率受脫粒軸轉速改變的影響不大;整體的損傷隨含水率增加而增加,而當脫粒軸轉數愈高,靠近末端的損傷增加的愈快;隨着脫粒軸轉速的升高,嚴重損傷及冠部損傷(亦卽連軸損傷),都有升高的趨勢;而離軸損傷則隨脫粒軸轉速升高而有減少的趨勢;玉米與穗軸之結合分離力大小與含水率沒有明顯相關。本研究中以理論式推導得知,脫粒機構的設計中直接影響脫粒率的是脫粒齒與玉米穗的作用角度。 |
英文摘要 | This research studies the mechanical damage of axial type corn sheller which was adopted by most of factories in this country. Topics of this literature are: 1. mechanical factors influencing shelling damage, 2. the shelling percentages along cylinder axis, 3. to justify on-the-cob damage and off-the-cob damage based on a damage index system. Experimental results revealed that the ratio of on-the-cob damage and off-the-cob damage is 3 to 5. About 45%-50%of kernels are shelled from the cobs after they enter the beginning half zone of the cylinder and cylinder speed has less effect on shelling percentage of each zone. The total damage is increased with the increment of the kernel moisture content. The severe damage and crown damage are increased with higher cylinder speed, while the off-the-cob damage are decreased. The kernel moisture content has no effect on detachment force. Revealed from the theoretical analysis, the most important factor of the sheller structure is the angle between cylinder teeth and cobs. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。