Name
Marchenko Alexey Yurievich
Scholastic degree
•
Academic rank
associated professor
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
—
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Articles count: 14
The article presents the results of the research on modeling of working bodies of agricultural equipment by methods of engineering geometry and computer graphics. The design and the principle of operation of the equipment on the basis of working bodies in the form of screw drums is shown on the example of a device for the preparation of concentrated feed
Improvement is offered for working bodies’ forms in
devices for preparation of forages by methods of
engineering geometry and computer graphics. That
opens not only great opportunities for intensification,
increase in productivity and efficiency of the
technological processes, but also opens ways for
creation of small-sized devices for their realization.
Constructive study of geometry of working bodies
surface, allows us to give wavy movement to particles
of forage and impart them the movement with bigger
power consumption. In such installations forage
particles components, meeting walls of working body,
change their direction and, meeting other portions of
particles of forage components, mix up. From loading
to unloading, throughout the installations working
body length, flexible and strong waves of forage
particles components movement inside the working
body are born. The conducted pilot studies have
shown that as a result of working bodies’ forms
improvement of devices for preparation of forages by
methods of descriptive geometry such devices can be
implemented in a variety of industries
A number of small-sized machines for division of loose
materials on the basis of screw drums created with use
of engineering geometry and computer graphics
methods, in particular of the engineering geometry
section: curves and surfaces. In these machines, unlike
the known ones, the effect of the movement of bulks on
the curvilinear surfaces of screw reels with imposing of
low-frequency fluctuations from the vibrator on this
main movement is used. Such addition of two
movements does not only increase productivity, but also
provides self-cleaning of the sifting surfaces of screw
drums. The standard machine’s schemes are presented
with use of low-frequency fluctuations on the basis of
the screw drums made of several screw punched strips
with smooth screw lines on perimeter and also of screw
drums of only one of punched strips with various form of
cross section of the sifting surface
Results of engineering and scientific search of
improvement of resource-saving machine technologies
of finishing and cleanup processing of cars details,
development of new camps and technologies are
presented. The possibility of low-frequency
fluctuations with big amplitude can be implemented
due to assembling flat or curvilinear elements on
external surfaces of the relative screw reel. The use of
computer modeling enabled us to obtain a relative
screw drum that provides not only giving movement to
loading masses with a big fluctuations amplitude, but
also compression of loading masses in the process of
their motion from loading to unloading. In such
machines increase in processing efficiency is reached
not only due to achievement of great movement
amplitudes values of the loading masses, but also at
the cost of compression of loading masses in
processing and intensity increase of their mixing. The
scheme of the machine for continuous processing with
mechanization of separation of details from working
environments particles is provided. Results of
researches of quality and surfaces micro hardness
change processed in the offered machines designs
show that details processing time makes 3-6 min
Analytical research results of contact forces of interaction of concentrated forages components’ particles in their movement in relative screw drums are presented. It is shown that contact forces – the most difficult forces by their nature; result from stochastic (probable) collision of bulks particles and in particular of concentrated forages components’ particles. Therefore the main objective of this modeling – to describe the stochastic phenomena of the so-called conditional contacts of particles for which some assumptions are accepted, for example, in forcing of mass of concentrated forages components’ particles by the walls of the rotating relative screw drum in the radial direction there will simultaneously arise contacts caused by geometry of a screw drum, i.e. the property of its walls is pressure transfer in relation to the mass of particles in the direction of the modeled movement. Schemes of engagement of concentrated forages components’ particles contacting in the relative screw drum, the probable schedule of sliding speeds values change in their consecutive contacting, their density distribution are demonstrated
The authors have developed and manufactured a large
number of different designs of relative helical drums
for mixing animal feed. We have conducted 749 field
experiments with the drums of the 10 different designs
with different parameters modes of operation. In all
experiments, we measured the quality of the feed mixture.
However, directly based on empirical data, rational
choice of design features and parameters of the
operation modes of the reels is not possible. For this,
you must first develop a model reflecting these empirical
data. The construction of meaningful analytical
models of different types of drums is a difficult and
demanding scientific task, the complexity of which is
due to the large variety and complexity of forms of
drums and their mode of usage, a large number of diverse
physical factors affecting the processes in the
drum. As a consequence, the development of analytical
models associated with a large number of simplifying
assumptions that reduce their versatility and reliability.
Therefore, it is important to search of a mathematical
method and software tools provide a quick and simple
for the user to identify and influence the design of the
drum and the parameters of the operating modes on the
quality of the feed mixture directly on the basis of empirical
(experimental) data. The work proposes a solution
to this problem with the use of a new universal
innovative method of artificial intelligence: automated
system-cognitive analysis (ASC-analysis) and its programmatic
Toolkit – universal cognitive analytical
system called "Eidos". In the system of "Eidos" we have implemented a software interface that provides
direct input into the system large amounts of empirical
data from Excel file. Created on their basis in the system
of "Eidos" system-cognitive model allows the visual
form to reflect the effect of the structure of the
drum and the parameters of the operating modes on the
quality of the resulting feed mixture and to develop on
this basis the science-based and appropriate recommendations
for the rational choice of design features
and parameters of the modes relative to the screw
drums. We have also given a numerical example
The article presents results of the study of devices for
preparation of feed based on the relative helical drums.
In addition, we have created a method of calculation of
the drive, including motor power. We have given a
calculation sheet for relative helical drums of types of
5.1 and 3.1, as well as typical schemes of devices for
preparation of feed (feed-making machines) composed
of hollow equilateral triangular of hollow tetrahedrons
pyramids and hollow octahedra. The created method
of calculation of the drive was tested in the calculation
of power consumption of feed-making machines based
on spiral reels of 5.1 type mounted using hollow
tetrahedrons and spiral reels of 3.1 type, assembled
from hollow octahedra. It is shown that in the
calculation of the actuator, we should not only take
into account the mass loading of feed components, the
relative weight of the screw drum assembled with
wheels, for a symmetrical load location, but also a lot
of download components of feeds, arranged in a spiral
relative the drum asymmetrically to the axis of
rotation. Thus, summing up the power of the electric
motor, required for relative rotation of the screw drum
symmetrically loaded and also under asymmetric load
we define the motor power for the device for
preparation of feed, or feed-making machine
The article presents the results of studying of prospects
of use of the relative screw and combined drums in
agro-industrial complex. The developed and approved
classification of the relative screw and combined drums
has been shown in expanded form. The kinds of the
equipment on the basis of the relative screw and
combined drums making a rotary motion in which the
oscillating motion with a big amplitude, only at the
expense of an original spatial form of their internal
surfaces is reported to subjects of processing are
presented. In such devices, there are no vibroactivators.
Equipment samples in which the relative screw and
combined drums aren't rotated are also presented. They
are fixed elastically on the bed and are supplied with
vibroactivators. During the operation of the
vibroactivator, processing subjects in such cars, as a
result of the circulating movement in the relative screw
and combined drums in the planes, perpendicular axes
of their symmetry, receive the additional movement
from the walls of drums of various geometrical forms
inclined to each other
The article presents the experience of creation of the
equipment on the basis of the relative screw and
combined drums providing highly effective
technological processes, because for such drums it is
characteristic not only creation of fluctuations to
processing subjects with an amplitude of movement of
15-1000 mm and more, but also the opportunity to
operate oscillatory process, changing transport or
technological effect. Therefore, works on creation of
the equipment, for realization of such technological
processes, are extremely important and actual for
dehydration of manure, drying of chicken dung, and
for preseeding processing of seed material. We present
kinds of the equipment in which vibroactivators are
absent. Equipment samples in which relative screw
and combined drums aren't rotated are also presented.
They are fixed elastically on a bed and are supplied
with vibroactivators. In such devices during the
operation of the vibroactivator, processing subjects as
a result of the circulating movement in the relative
screw and combined drums in the planes,
perpendicular axes of their symmetry, receive the
additional movement from the walls of drums of
various geometrical forms inclined to each other
The article reveals a possibility of using equipment
based on relative screw and combined drums for
mixing of bulks. Change of relative positioning of flat
elements of sidewalls of internal surfaces in relative
screw drums allows operating the difficult and spatial
movement of streams of bulks. In relative screw
drums we have developed effective processes of
mixing and sets of the equipment, which are
characterized by that fact the difficult and spatial
screw movement taking place in relative screw drums
is dismembered on rather simple, in the kinematic
relation, in the movements. The difficult and spatial
screw movement with a big amplitude of 15-1000 mm
and more, in the offered equipment constructions on
the basis of relative screw or combined drums, is
reported to bulks by elements of the relative screw or
combined drums of various parameters and
configurations which becomes complicated also screw
lines on perimeter of a relative screw drum with
various number of calling and the directions from each
other or rounds of the springs fixed in the relative
combined drums