科研之友
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摘要
Three prototype rotary blades designed to reduce the tilling torque, impact force and specific tilling energy were tested in a laboratory soil bin. These new blades were planned to fix on the rotor of a rotary tiller attached to a two-wheel tractor. The shape of the prototype rotary blade was simple for easy production. The experiments with the prototype rotary blades and Japanese C-shaped blade were carried out at forward speeds of 0.069 and 0.142 m/s and at rotational speeds of 150, 218, 278 and 348 rpm (or 3.30, 4.79, 6.11 and 7:65 m/s) by down-cut process in clay soil. Also tests with European L-shaped blade and European C-shaped blade at 0.069 m/s forward speed and the same rotational speeds were conducted. The experimental results of the prototype rotary blades with 15 degrees, 30 degrees and 45 degrees lengthwise slice angle and 6.5 cm tilling width indicated that their torque was evidently less than the Japanese C-shaped blade. The impact force was eliminated. The specific tilling energy per tillage round for new blades was less than the Japanese C-shaped and the European C-shaped blades.
- 出版日期2010-10
