Abstract
The paper dwells upon how the parameters of an agricultural machine and tractor unit (MTU) affect the effectively used mean indicated power. The operating parameter in use is the MTU travel speed, while the design parameter used is the suspension stiffness. Transport-mode losses of mean indicated power due to dynamic loads have been determined for the following factors: ascent resistance; MTU inertial forces; MTU suspension vibrations in the longitudinal vertical plane; mechanical losses in the friction pairs; as well as the total loss for various suspension stiffness values. For the plowing mode, power losses are determined for the dynamics of soil removal by the plow. Despite the fact that transport-mode MTU operations are not as long as plowing operations, they are energy-intensive and feature considerable losses of power due to ascent, MTU vibrations in the longitudinal vertical plane, as well as due to the mechanical losses in friction pairs. Total dynamic power losses in transport and plowing modes peak at a frequency of 5.0 s−1, which is the energy-intense eigenfrequency (rotation speed) of the YaMZ-238ND5 engine. Increasing the MTU travel speed from 2.01 to 5.20 m/s and reducing the suspension stiffness causes a “shrinkage” in the area bounded by the total dynamic power-loss curve and coordinate axes. This changes the magnitude and frequency of dynamic mean indicated power components. Using the proposed method when designing enables the engineer to find the necessary and sufficient redundant indicated power to overcome the temporarily rising overloads without switching the gear (the gearbox) to a higher gear ratio.
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The authors would like to thank Vladimir Ivanovich Varavva, a Full Professor, and Valery Petrovich Antipin, an Associate Professor, for their invaluable assistance in writing the manuscript.
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Durmanov, M.Y., Martynov, B.G., Spiridonov, S.V. (2020). How Parameters of Agricultural Machine and Tractor Unit Affects Effectively Used Mean Indicated Power. In: Radionov, A., Kravchenko, O., Guzeev, V., Rozhdestvenskiy, Y. (eds) Proceedings of the 5th International Conference on Industrial Engineering (ICIE 2019). ICIE 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-22063-1_33
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DOI: https://doi.org/10.1007/978-3-030-22063-1_33
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