Harrow with screw-type operating tools: optimisation of design and process parameters
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Kuupäev
2022
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
A new design of the harrow with screw-type operating tools is presented in the paper.
It describes the theoretical and experimental investigations carried out for the purpose of
optimising the design and process parameters of the harrow with screw-type operating tools. Such
optimisation will provide for improving the soil fertility, when burying chaff and other plant
residues as organic fertilisers into the soil during its tillage. On the basis of the results obtained
in the comprehensive experimental investigations, new regression relations have been generated.
These relations provide for determining the proportion of the field surface, where the after harvesting
residues have been completely buried in the soil with the harrow with screw-type operating tools.
It has been established that the dominant effect on the relative amount of the field surface area S
with completely worked-in plant residues is produced by the soil tillage depth h, then follows the
factor of the screw-type operating device battery approach angle β. The pitch distance Т of the
screw-type operating device has the smallest effect. The results of the completed research prove
that increasing the pitch distance Т of the screw-type operating tool from 0.18 m to 0.26 m results
in the decrease in the area S of the field surface with the plant residues buried in the soil by 1.4%.
An increase in the approach angle β from 20° to 40° results in the increase in the field surface
area S with the plant residues completely worked into the soil by 5.6%. Increasing the soil tillage
depth from 0.08 m to 0.12 m results in the increase in the above-mentioned surface S by 7.1%.
The simultaneous action of the factors of the tillage depth h and the approach angle β results in
the percentage of the surface S rising from 72% to 82%.
Kirjeldus
Received: August 1st, 2022 ; Accepted: September 8th, 2022 ; Published: September 9th, 2022 ; Correspondence: jyri.olt@emu.ee
Märksõnad
diameter, disc angle, energy consumption, harrow, screw-type operating tool, soil tilling machine, tillage depth, articles