Modernization of grinding machines of grain cleaning machines

Dorokhov, Alexey; Khamyev, Victor; Lepeshkin, Kirill

doi:10.1051/matecconf/201822405009

Cited by 6 publications

(4 citation statements)

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“…The Froude number is the most critical functional estimating parameter of the sorted grain material's movement on the sieve surface. It is expressed by the ratio of forces acting on the grain material moving along the deck, the sieve vibrations amplitude, and gravity force [5,6,20].…”

Section: Methodsmentioning

confidence: 99%

“…The review of the studies of many scientists [4][5][6] allows concluding that separating machines with the vibrational movement of flat separating sieves are universal and widespread. Among them are swinging and vibrating separators, in which separation is carried out due to the gravity forces under the influence of vibrational forces that ensure the orientation of the separated particles relative to the sieve holes.…”

Section: Introductionmentioning

confidence: 99%

“…Among them are swinging and vibrating separators, in which separation is carried out due to the gravity forces under the influence of vibrational forces that ensure the orientation of the separated particles relative to the sieve holes. The vibrational forces consist of the forces of violent and natural sieve and kinematic drive system vibrations [5][6][7][8][9]. Therefore, the more complex the kinematic drive scheme, the more factors that affect the efficiency of the process and are negatively and increasingly manifested when mechanical parts wear out or age [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Description and Study of the Vibration Deck of a Grain Sorting Machine

Badretdinov¹,

Мударисов²,

Khasanov³

et al. 2022

MMEP

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This article presents the results of a study of the vibrations of the deck of a pneumatic sorting machine. The purpose of this work is to describe the design and technological parameters of the soundboard for the implementation of a mathematical model of the technological process of the grain sorting machine. A kinematic study of the flat hinge mechanism of the deck of a grain sorting machine has been carried out, for which all geometric dimensions are known and the laws of motion of the leading link-the electric drive of the deck based on an asynchronous electric motor – have been determined. As a result, the following were determined: kinematic modes of deck vibrations under various technological conditions; the laws of motion of all links of the deck mechanism, displacement, speed and acceleration of the driven links; a mathematical model of the kinematic scheme of the deck of a grain sorting machine driven by an asynchronous electric motor has been developed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical Description and Study of the Vibration Deck of a Grain Sorting Machine

Badretdinov¹,

Мударисов²,

Khasanov³

et al. 2022

MMEP

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show abstract

“…The mass ratio of grain to impurity in the mixture is about 3:1, but the volume ratio is 1:4. High impurity content after threshing makes it difficult to clean the subsequent grain [8]. The high impurity content after threshing by combine harvester was shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Controlling Rice Leaf Breaking Force by Temperature and Moisture Content to Reduce Breakage

et al. 2020

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Leaf fragments and grain mixture produced by rice threshing with a combine harvester seriously affects the subsequent grain cleaning efficiency. In this paper, rice leaf breaking force was tested at different temperatures and moisture contents to analyze the influence of temperature on the tensile properties of rice leaves. The overlapping regions of rice leaf breaking force and grain separation force at different temperatures were obtained. Based on the rice leaf breaking force, the effect of the temperature change on rice leaf with different moisture content was analyzed. The results showed that tensile strength of rice leaf decreased first, then increased and finally decreased from rice sheath to the top. The tensile breaking force of the leaf sheath was about 75 N (N is Newton, 1 N = 1 kg·m/s²). The tensile fracture resistance of rice leaf was shown to weaken with the increase of temperature. The influence of the moisture content on the mechanical properties of rice leaf during the process of temperature change was small. At 30 to 35 °C, the blade was the strongest tensile fracture resistance, which was the lowest probability of fracture under the same stress condition. At this time, the rice grain separation force has the least coincidence with the rice leaf resistance to breakage. According to the breaking force of different blade layers, the number of blade layers has a significant linear relationship with its tensile limit. Therefore, the overall fracture resistance of the multilayer blade can be improved by controlling the temperature and moisture content.

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Mathematical Modelling of the Fruit-Stone Culture Seeds Calibration Process Using Flat Sieves

Karaiev

Bondarenko

Halko

et al. 2021

Acta Technologica Agriculturae

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The paper provided describes a mathematical model of calibration process of fruit-stone culture seeds of cherry, sweet cherry, cherry-plum, apricot and almond using flat sieves with impact shock ball cleaners oscillating in the horizontal plane. It has been defined that the mathematical expectation of time of knocking out the fruit-stone from the sieve opening T ⌢ \mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over T} is the minimum value of ratio of average time of complete ball motion cycle in space under sieve to the probability of knocking out the stone by a ball with the kinetic energy level of 2 Mj. The dependences of energy distribution density of ball on impact on the sieve have been obtained, based on which the intervals of ball cleaner parameters have been determined, i.e. the ball diameter D belongs to the interval 25–35 mm; the space height H under sorting sieve belongs to the interval 1.2D–1.4D mm; the value range for distance between rods t belongs to the interval 0.5D–0.7D mm. Using the method of golden section, the following parameters of ball cleaner were obtained: D = 33 mm, t = 23 mm, H = 40 mm. The parameters obtained provide mathematical expectation of time of knocking out the fruit-stone from the sieve opening T ⌢ \mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over T} = 0.03 s. Consequently, the average ball velocity v ⌢ \mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over v} is = 0.4 m∙s-1, and the average ball path is L ⌢ \mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over L} = 0.006 m.

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Modernization of grinding machines of grain cleaning machines

Cited by 6 publications

References 0 publications

Mathematical Description and Study of the Vibration Deck of a Grain Sorting Machine

Mathematical Description and Study of the Vibration Deck of a Grain Sorting Machine

Controlling Rice Leaf Breaking Force by Temperature and Moisture Content to Reduce Breakage

Mathematical Modelling of the Fruit-Stone Culture Seeds Calibration Process Using Flat Sieves

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