The theory of vibrational wave movement in drying grain mixture
Laen...
Kuupäev
2020
Kättesaadav alates
Autorid
Bulgakov, V.
Holovach, I.
Kiurchev, S.
Pascuzzi, S.
Arak, Margus
Santoro, F.
Anifantis, A.S.
Olt, Jüri
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
This paper outlines a theory that involves the vibrational wave transportation of bulk
grain during the course of passing that grain under an infrared radiation source, in a working
thermal radiation drying chamber, and using a vibrational wave transporter belt that has been
developed by the authors of this paper. The main outstanding feature of the proposed design is
the presence of mechanical off-centre vibration drives which generate the vibration in the working
rollers at a preset amplitude and frequency, thereby generating a mechanical wave on the surface
of the flexible transporter belt which ensures the movement of bulk grain along the processing
zone which itself is being subjected to infrared radiation. A calculation method was developed
for the oscillation system that is used in conjunction with the vibrational transportation of the
grain mass, in order to be able to determine the forces that may be present in the vibrational
system and to prepare the differential calculations for the movement of the vibrational drive’s
actuators, utilising for this purpose Type II Lagrange equations. The solving of the
aforementioned integral equations on a PC yielded a number of graphical dependencies in terms
of kinetic and dynamic parameters for the vibrational system described above; the analysis of
those dependencies provided a rational structural, along with kinetic and dynamic indicators.
According to the results that were taken from theoretical and experimental studies on the
functioning of the developed infrared grain dryer combined with a vibrational exciter, stable
movement for its working roller takes place if the angular velocity of a drive shaft is changed
within the range of between 50–80 rads–1
, whereas the amplitude of the indicated oscillations falls
within the range of 3.0–4.0 mm. It has been discovered that a rational speed when transporting
soy seeds during infrared drying falls between the range of between 0.15–0.60 cm s
-1
, whereas
the amplitude of the indicated oscillations falls within the range of 3.0–4.0 mm. An increase of
this parameter within the stated limits increases the time that it takes to achieve the stage in which
a constant drying soy speed is reached by more than 2.5 times (from 205 seconds to 520 seconds),
stabilising the figure at a level of 520 seconds, which makes it possible to recommend a range of
transport speeds of between 0.15–0.40 cm s
–1 under infrared radiation for the seeds in order to
achieve the required moisture content with a single pass of the produce on the wave transporter.
With that in mind, the power consumption levels for the vibrational exciter do not exceed 50W,
while the angular velocity of the drive shaft’s rotation falls within the range of between 100–
120 rads–1
. The results of the experimental study that has been conducted indicated that a rational
transportation speed for the soy seeds on the wave transporter under infrared radiation is between
0.15–0.40 cm s
–1.
Kirjeldus
Märksõnad
drying, grain, kinetic and dynamic parameters, model, quality, transportation, articles