Studies on Combined Drawn and Rotating Tillage Implements (I)

Abstract

The power requirement of tillage were measured by using the small tractor attached the simple inclined tillage tool at the front of rotary tilling device. The characteristcs of the combination tillage were summarized as follows.
(1) When a tine was mounted solely on the rotary shaft, the peak torque of rotary shaft in the combination tillage was about 0.3-0.4 times as large as that in the rotary tillage.
(2) The toque of rotary shaft in the combination tillage was about 0. 5 times as large as that in the rotary tillage.
(3) When the frequency of the rotary ravolution is f₀ c/s, the power spectral densities in 2 f₀ and 15 f₀ are greater than in other frequencies for the combination tillage, but that in 2 f₀ and 12 f₀ are greater than in other frequencies for the rotary tillage.
(4) The effect of tilling methods on the distribution of the peak torque of rotary shaft could not be recognized in the tests, but the distribution increased when the tilling pitch was smaller on every conditions.
(5) The rotary shaft power requirement in the combination tillage was equal to the sum of the drawbar horsepower of simple inclined tool and the horsepower of rotary shaft, and the power requirement was about 0.6 times as large as that in the rotary tillage.