The
numerical
simulation
and
high-speed
photography
technology
are
used
in
this
work
to
obtain
the
key
factors
affecting
seeding
performance
a
novel
centrifugal
filling-cleaning
precision
metering
device
under
different
conditions.
effects
of
parameters,
including
seed-metering
turbine
structure,
dynamic
wind
pressure,
seed
quantity,
operating
speed,
investigated
on
is
examined
analyzed
by
series
experiments.
results
show
that
structure
with
diversion
controlled
disturbance
flow
increasing
pressure
enhancing
filling
process.
Meanwhile,
correlation
between
movement
velocity
established
using
camera-based
experimental
approach.
Moreover,
maintaining
internal
seeds
within
range
24
60
particles
crucial
guaranteeing
qualified
index.
Specifically,
when
working
speeds
14
km/h
(corresponding
rotation
194.5
rpm),
while
corresponding
identified
as
1.5
kPa,
plate
speed
2
m/s,
optimal
feeding
rate
should
be
maintained
roughly
at
particles/s,
particle's
inlet
3
respectively.
comprehensive
bench
field
tests
demonstrate
there
no
apparent
decline
even
operational
conditions,
qualifying
index
exceeds
90
%
consistently.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 2, 2025
Due
to
the
small
and
irregular
shapes
of
vegetable
seeds,
modeling
them
is
challenging,
imprecision
physical
parameters
hinders
performance
seeders,
impeding
simulation
development.
In
this
study,
seeds
cucumber,
pepper,
tomato
were
seen
as
examples.
A
3D
point
cloud
reconstruction
method
based
on
Structure-from-Motion
Multi-View
Stereo
(SfM-MVS)
was
employed
accurately
extract
models
irregularly
shaped
seeds.
Corresponding
discrete
element
established.
Combining
experiments
seed
angle
repose(AOR),
significant
influencing
AOR
their
ranges
identified
through
Plackett–Burman
Design
(PBD)
steepest
ascent
test.
Within
range,
GA-BP-GA
algorithm
used
inverse
optimal
parameter
combination.
The
results
indicate
that
SfM-MVS
can
more
detailed
shape
information
achieved
an
inversion
with
smallest
relative
error
being
0.26%,
0.98%,
0.51%,
respectively.
Through
experimental
comparative
analysis,
feasibility
accuracy
in
calibrating
for
validated.
established
calibrated
study
be
implemented
optimization
design
enhancing
development
efficiency
operational
performance.
Frontiers in Mechanical Engineering,
Год журнала:
2025,
Номер
11
Опубликована: Фев. 17, 2025
Introduction
In
order
to
improve
the
fertilizer-discharging
uniformity
of
traditional
spiral
fertilizer
distributor
and
achieve
precise
controllable
fertilization,
based
on
agronomic
characteristics
fertilization
in
pineapple
orchards,
a
notched-blade
discharger
with
mechanism
discontinuous-blade
sliding-cutting
pushing-pore
is
innovatively
designed.
Methods
Based
parametric
modelling
determining
volume
accommodation
spiral,
theoretical
amount
determined
combination
analysis.
The
main
factors
influencing
performance
are
analyzed
using
calculation
formulas.
discrete
element
method
used
simulate
process.
By
comparing
simulation
experiments,
it
that
has
better
than
one.
effects
number
shape
periodic
notched
blades
through
single-factor
experiments.
L
9
(3⁴)
orthogonal
table
adopted
for
conducting
tests.
Results
test
results
show
primary
secondary
influence
indexes
blade
notch
number.
When
sector,
three
notches,
fluctuation
coefficient
discharge
27.01%.
bench
27.42%
when
rotating
speed
60r/min.
experimental
values
consistent.
Moreover,
reduced
by
64.86
percentage
points
compared
under
same
conditions.
64.86%
lower
different
rotational
speeds,
fitting
curve
y
=
2.02
x
+
23.02.
Conclusion
can
be
controlled
adjusting
speed.
It
improves
accuracy
application
achieves
goal
green
sustainable
development
industry
tropics.
research
provide
reference
designing
optimizing
dischargers.
Agriculture,
Год журнала:
2024,
Номер
14(4), С. 635 - 635
Опубликована: Апрель 20, 2024
Fertilizer
can
improve
the
yield
of
crops
per
unit
area,
and
uniform
fertilizer
discharge
utilization
rate.
Therefore,
it
is
meaningful
to
performance
fertilizer-discharge
devices
in
order
modernization
level
crop
field
management.
To
address
problems
operational
smoothness,
stability
poor
uniformity
discharge,
other
difficult
encountered
with
strip
devices,
this
study
designs
a
disturbed
strip-discharge
device
vertical
pendulum.
The
main
factors
affecting
were
wedge
angle
push-disturbing
pendulum
bar
(PMPB),
inclination
aided-stirring
pick
(APP),
flow
gap
(FGPB),
operation
frequency
swing-rod
combination
(SRC).
discrete
element
method
(DEM)
was
used
establish
simulation
model
explore
influence
on
coefficient
variation
(CV)
accuracy
(FDA)
as
evaluation
indices.
results
show
that
CV
FDA
were,
priority,
SRC,
FGPB,
PMPB,
APP.
optimal
parameters
after
rounding
follows:
PMPB
45°,
APP
46°,
SRC
188
times/min,
FGPB
4.5
mm.
At
point,
predicted
would
be
10.53%,
3.19%.
Using
for
bench
test
verification,
found
mm,
11.06%,
3.51%.
In
test,
stable
had
good
adaptability
different
fertilizers.
provide
theoretical
reference
development
precision
strip-fertilizer
application
devices.
Agriculture,
Год журнала:
2024,
Номер
14(7), С. 1131 - 1131
Опубликована: Июль 12, 2024
In
order
to
solve
the
traditional
single-spiral
fertilizer
discharger
issue
of
fluctuation
fertilizer-discharge
flow
and
problem
precise
discharge,
innovative
design
a
cantilevered
oblique
placement
fertilizer-discharging
spiral
structure
in
form
an
inclined
was
realized,
which,
through
spiral’s
full
end-filled
extrusion,
uniform
delivery
discharge
achieved.
Discrete
element
simulation
used
compare
characteristics
dischargers,
results
proved
that
effectively
reduced
rate.
Through
theoretical
analysis
preformed
determine
main
parameters
affecting
uniformity
we
identified
tilting
angle
(θ)
distance
from
termination
blade
outlet
(l).
A
two-factor,
five-level
quadratic
generalized
rotary
combination
experiment
conducted
with
two
(θ
l)
as
factors
variation
coefficient
(σ)
indicator.
The
experimental
showed
for
σ,
θ
highly
significant
effect,
l
σ
less
than
8.5%;
when
35.02°
16.87
mm,
performance
better.
bench
relative
error
between
under
this
2.28%.
And
compared
discharger’s
average
increase
80.79%,
effect
better
discharger.
application
controller
developed,
tested
based
on
measured
rate
fitting
equation
combined
show
electronically
controlled
has
deviation
3.12%
preset
value,
which
can
be
regulate
discharged
realize
application,
study
provide
reference
optimal
Applied Sciences,
Год журнала:
2024,
Номер
14(9), С. 3884 - 3884
Опубликована: Май 1, 2024
The
pneumatic
centralized
fertilizer
discharge
system
is
an
important
part
of
fertilization
machinery
and
mainly
includes
a
device,
air–fertilizer
mixing
device
distribution
device.
In
this
paper,
the
mechanical
structure,
key
parameters
research
methods
devices,
devices
at
home
abroad
are
briefly
analyzed.
advantages
disadvantages
these
existing
summarized,
problems
discussed
improvement
put
forward.
structural
adaptability,
uniformity
stability
different
types
such
as
external
groove
wheel
types,
spiral
centrifugal
comprehensively
working
principle
using
Venturi
effect
to
achieve
uniform
airflow
expounded.
effects
with
forms
on
performance
motion
characteristics
air–solid
two-phase
flows
influence
internal
mode
accuracy
This
paper
focuses
how
improve
uniformity,
consistency
across
rows
provided
by
system.
status
progress
made
regarding
core
components
summarized.
Based
results,
factors
for
improving
discussed.
