PERFORMANCE EVALUATION OF HORIZONTAL AND VERTICAL ROTAVATORS 2015
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Date
2015-06
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JAU,JUNAGADH
Abstract
In tillage, rotavator blades may be rotated on vertical-axis or horizontal-axis
rotor shafts. Little is known and shown about the vertical axis rotavators and thereby
very little documentation is available on the performance of the vertical rotavator and
or very few studies have been conducted on comparative performance of vertical
rotavators with horizontal rotavators. Vertical and horizontal axis rotavators were
tested in two different fields having 11.78 % and 10.51 % moisture contents. Their
performance results were analyzed in terms of tilling quality of soil and machine
performance. The effects of two operating parameters namely tilling depth and
operating speed on soil physical properties like soil mean weight diameter, soil
penetration resistance, bulk density and soil disturbed area were evaluated. Machine
performance parameters like fuel consumption, energy requirement, field efficiency
and operating cost were also determined.
Better performance in terms of tilling quality of soil was obtained by using
vertical axis rotavator at field no.l with soil moisture content 11.78 %. The average
values of soil mean weight diameter, cone index, bulk density and the percentage of
soil disturbed area were found to be 4.00 and 4.72 mm; 53.00 and 56.20 kPa; 1.18 and
1.22 g/cm^ and 94.43 and 91.19 % by using vertical and horizontal axis rotavator,
respectively. The average values of fuel consumption, energy requirement, field
efficiency and operating cost were found to be 15.60 and 13.20 1/ha; 958.23 and
816.47 MJ/ha; 87.61 and 86.11 % and Rs 1900 and 1500 per ha for vertical and