Impact of the plough body parameters on the soil tillage efficiency
2006
Rucins, A.(Latvia Univ. of Agriculture, Ulbroka, Riga reg. (Latvia). Agency Research Institute of Agricultural Machinery)E-mail:[email protected] | Vilde, A.(Latvia Univ. of Agriculture, Ulbroka, Riga reg. (Latvia). Agency Research Institute of Agricultural Machinery)E-mail:[email protected]
The main parameters of the plough body that determine the ploughing efficiency are the initial and the final soil slice lifting angles on the share-mouldboard surface, the angle of its horizontal generatrix, the radius of this surface and the working width of the body. By using analytical correlations derived as a result of theoretical research, a computer algorithm has been worked out for simulating the functions of the plough body and the forces exerted by soil upon the operating parts, as well as its draft resistance. These correlations allow to determine the forces acting on the plough body and its draft resistance depending on the body parameters, as well as to evaluate their impact on the ploughing efficiency: energy and the fuel consumption and the quality of work. For economical ploughing the initial lifting angle of the soil slice (the angle between share and furrow bottom) must have a minimal value (28-32 deg). If the speed increases, the optimum inclination value of the horizontal generatrix for the minimum draft resistance decreases. In loamy soils, when the operating speed is 1-3 m sE-1, its optimum value on the initial part of the share-mouldboard surface is correspondingly 65-40 deg to 33-25 deg. To ensure sufficient turning of the slice, the angle of the top generatrix must not be less than 48deg. If the radius of the mouldboard increases, the draft resistance of the body increases, which is connected with increased partial resistance caused by the weight and adhesion of the soil. If the working width of the body is increased from 30 m to 50 m, the specific consumption of energy, fuel and the ploughing costs decrease (in loamy soil by 10-16%) but the labour efficiency correspondingly increases. The use of bodies having optimal parameters allows obtaining good ploughing quality, reduce draft resistance by 12-20% and correspondingly raise the efficiency, to save fuel and financial resources for ploughing.
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