Influence of hydraulic control on energetic demands of tractor ploughing sets
2003
Dudak, J. | Petransky, I. | Drabant, S. | Zikla, A. | Bolla, M. | Petransky, P. (Slovak Agricultural Univ., Nitra (Slovak Republic))
The aim of this study was realised operating measurements of energetic demands of two ploughing sets, consists of the ZTS 18345 M2000 tractor aggregated with the mounted Kuhn four-plough share, and with the semi-mounted Plower five-plough share. The set used mixed and draught control positions of the three-point hitch of the tractor. When ploughing with the Kuhn plough and using position control, increased plough resistance is manifested by an increase in slip, a decrease in speed of the set and a decrease of area performance. Fuel consumption per ton of ploughed soil is lower than under draught control. Under draught control and increased plough resistance, ploughing depth is shallower, slip is low, and there is no decrease of speed and area performance of the set. Variance of ploughing depth in consequence of a change in resistance is manifested by increased fuel consumption per ton of ploughed soil. In this case usage of draught control is unsuitable from the agronomic and energetic viewpoint. Results of measurements vindicate this. Due to changes in the hydraulic control, difference of performance and energetic parameters is lower than with the previous set, when ploughing with the Plower plough. This is supposed to be caused by the manner in which the plough is fastened to the tractor. Under increased resistance and draught control, the front part of the plough will be lifted by the hydraulic arms and the change of ploughing depth has no effect on the back ploughshares. The result of such work is a non-uniform field surface, which is also unsuitable from the agronomic and energetic viewpoints
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