Research into geometric parameters of digging shares used for lifting sugar beet roots from soil with assistance of vibration
Laen...
Kuupäev
2021
Kättesaadavus
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
One of the important conditions in securing the high quality, when performing the
work process of vibrational root lifting, is to avoid damaging the roots. It is obvious that the
greatest probability of damaging and even breaking the lifted root arises, when the tool interacts
with the root body during their first contact and in the time of the root passing in the throat
between the operating shares. The aim of the study is to substantiate the rational design length
for the working throat of the vibrational root lifter in its interaction with the sugar beet root while
lifting the latter from the soil. As a result of the completed research, the minimum permissible
tool oscillation frequencies have been determined for the specific values of the lifter’s
translational velocity and the working throat rear part length, at which the event of the vibrational
lifting tool gripping the root will occur at least one time. For example, when the length of the
lifter’s working throat rear part is equal to 0.1 m and the oscillation frequency is equal to
ν = 20.3 Hz, the satisfactory quality of the vibrational root lifting process is ensured, when the
velocity of the translational motion performed by the vibrational lifter stays within the range of
1.3–2.55 m s
–1
. In order to ensure the good quality of the vibrational root lifting process at the
lifter’s translational velocity equal to V = 2.0 m s
–1
and the frequency of its tool’s oscillations
equal to ν = 10 Hz, it is necessary that the length of the lifter’s working throat rear part is equal
to 0.2 m, at a tool oscillation frequency of 6.7 Hz - 0.3 m. As a result of the completed numerical
calculations, the permissible values have been determined for the tool oscillation frequency,
which can be recommended for the translational velocities within the range of 1.3–2.2 m s
–1
,
taking into account the limitation set for the tool oscillation frequency by the pre-condition of the
guaranteed gripping of each root by the digging shares.
Kirjeldus
Received: February 2nd, 2021 ; Accepted: March 27th, 2021 ; Published: April 7th 2021 ; Correspondence: jyri.olt@emu.ee
Märksõnad
amplitude, frequency, oscillation, sugar beet root, vibrational lifting tool, articles