Theoretical research into directional stability of trailed tandem- type disk harrow
Laen...
Kuupรคev
2021
Kรคttesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Kรถite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Disking is one of the methods of soil cultivation, provides its effective crumbling, loosening,
partial mixing and soil inversion. This ensures that crop residues on the soil surface are shredded
and intermixing with loosened soil particles. Since, in addition to crop stubble, weeds are also
counted as crop residues, soil disking, along with the use of herbicides, is often regarded as the most
effective method of controlling the weediness of the agricultural background. Despite the fact that
numerous studies on the disk harrow working process are available, insufficient attention has been
paid to the study of the stability of harrow machine-tractor units, especially trailed ones. The purpose
of this study is to establish the theoretical patterns that would provide for selecting the trailed disk
harrow parameters that ensure the desired directional stability of the implement, which, in its turn,
helps to achieve the desired qualitative performance of the disk harrowing machine-tractor unit. The
principles of the theory agricultural machine, analytical mechanics, higher mathematics, as well as
methods of PC-assisted numerical calculations have been used. According to the results of the study,
it has been established that sufficient directional stability of the trailed disk harrow can be ensured
if its working width B, the distance from the hitch point to the centre of resistance (parameter d) and
the operating speed ๐๐ are properly selected. Determining the above-mentioned parameters of the
disk harrow with the use of the obtained new analytical relations ensures achieving just their optimal
combination, which provides for the maximum field productivity of the harrow machine-tractor unit
with the satisfactory stability of disk harrow movement in the horizontal plane.
Kirjeldus
Received: August 27th, 2021 ; Accepted: October 6th, 2021 ; Published: October 7th, 2021 ; Correspondence: jyri.olt@emu.ee
Mรคrksรตnad
disk harrow, dissipation, quasi-elasticity, speed, stability, working width, articles