Studies on the Seedbed Making Tillage by Rotary Tiller (II):On the Characteristics for the Variation of Tillage Tines
スポンサーリンク
概要
- 論文の詳細を見る
The shape of blade of tilling tine was examined from the standpoint of the seedbed making tillage. An L-shaped cutting edge having a 90° deflection angle was taken as the basis, with radii of curvature of 8, 18, 28, 45, 65, and 85mm and their performances were compared with those of readymade knife tine and pick tine.1) The smaller the redius of curvature, the higher the degree of soil pulverizing and leveling and power requirement.2) The covering efficiency of rice stubble under practical tilling condition is the highest in N45(r=b) tine and reaches 80 to 90%, and decreases for the tines with larger or smaller radius of curvature. The efficiency is the lowest in Hn tine and is around 30%.3) The uniformity of soil pulverizing is inversely proportional to the degree of soil pulverizing expyessed by the weight mean diameter.4) The power of the wheel axle becomes negative as the tilling torque increases exempt in Hn tine, and its rate increases as the radius of curvature decreases.5) The fluctuation ratio of tilling torque varies a little by changing tilling depth and pitch and is about 1.40 in Nn. But the ratio decreasis by incre asing the tilling depth in Nr and Hn tines, within a range of 1.30 to 1.95. In the latter, the ratio is high at medium tilling pitch and is low at smaller or lager tillng pitch, and its region of variation is from 1.35 to 1.80.6) The maximum tilling torque distributes in the higher torque range with higher frequency as the radius of curvature becomes shorter.
- 農業機械学会の論文
農業機械学会 | 論文
- 千切大根の乾燥特性 ―収縮を伴うみかけの減率乾燥―
- 水浸時の精白米の裂傷に関する研究
- 赤外線ガス分析計による籾・小麦の呼吸特性の測定
- 籾のマイクロ波乾燥に関する基礎的研究
- 氷蓄熱冷却式貯蔵庫による伊予柑の貯蔵とシステムの熱負荷特性の解析