The Influence of Basic Parameters of Separating Conveyor Operation on Grain Cleaning Quality

Vasylkovskyi, Oleksii; Vasylkovska, Kateryna; Moroz, Serhii; Sviren, M.; Storozhyk, L. І.

doi:10.35633/inmateh_57_07

Cited by 13 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The solution to the set problem is proven by the qualitative match between the results of our study and the findings reported in works [4,10], as well as experimental confirmation in papers [5,6]. The specified condition under which the effect of side walls can be neglected is also confirmed by studies [2,3,[11][12][13], indicating that we have solved the set problem.…”

Section: Discussion Of Results Of Studying the Influence Of Side Wallsupporting

confidence: 89%

“…We solved the set problems by using a system of motion equations of a loose mixture (1) to (3), which makes it possible to investigate the characteristics of flow over the entire area of a vibratory sieve, taking into consideration the boundary effects on surfaces that limit its volume (4) to (12). Owing to the established changes in the flow over the sieve width and length, it was possible to determine the qualitative and quantitative influence of the side wall parameters on the motion of a mixture flow.…”

Section: Discussion Of Results Of Studying the Influence Of Side Wallmentioning

confidence: 99%

“…Works [12][13][14] studied the separation on sieves by examining the movement of loose mixtures to form the optimal conditions for the separation process components -segregation and sifting. The degree of loosening the mixture by changing porosity was determined, to improve the ability of particle passing through a layer to the surface of a sieve [15].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 2 more Smart Citations

Patterns of influence exerted by the side walls of a vibratory sieve on the motion of a loose mixture flow

Piven

Spolnik

Sychova

et al. 2020

EEJET

View full text Add to dashboard Cite

The influence of the side walls of a vibratory sieve on the motion of a loose mixture flow has been investigated. The regularities have been established of the flow motion parameters on the walls' height, the resistance of their surfaces, the length and distance between them. The condition has been defined for the occurrence, degree, character, as well as the region of the side walls' influence on the mixture motion over the entire area of a sieve. Increasing the height of the walls, the length and resistance of their surfaces increases the surface density and reduces the longitudinal velocity of a mixture near the near-wall region, causing the occurrence of the transverse velocity component and the uneven distribution of the specific load of the sieve. For the wall's steady parameters, there is a threshold of distance between them, at which the near-wall regions of uneven loading begin to interact with each other, thereby enhancing their influence on the flow. There occur the under-loaded and overloaded sites in the sieve that differ in the magnitude of deviations and area. The uneven loading area reaches 83 % of the sieve area while the magnitude of deviations in the specific loading is 26 %. A condition of the influence exerted by the side walls on a flow is exceeding the minimum values of the parameters: a wall height, h>4•10-3 m; the resistance of a wall surface, C z >2 kg/m 2 •s; a wall length, l>0.5 m. The side walls' influence leads to the formation of a near-wall region of the sieve's under-loaded and overloaded sites, whose deviations and area are the same. The magnitude of the wall's region of influence increases in proportion to the sieve length and acquires the shape of a rectangular triangle. To reduce the influence of the side walls, it is necessary to reduce the resistance of their surfaces, the sieve length, and to increase its width, to avoid the threshold distance between the walls and a simultaneous growth of their parameters. The patterns in the side walls' influence underlie the improvement of vibratory-sieve separators and the substantiation of their operation modes

show abstract

Section: Discussion Of Results Of Studying the Influence Of Side Wallsupporting

confidence: 89%

Section: Discussion Of Results Of Studying the Influence Of Side Wallmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 1 more Smart Citation

Patterns of influence exerted by the side walls of a vibratory sieve on the motion of a loose mixture flow

Piven

Spolnik

Sychova

et al. 2020

EEJET

View full text Add to dashboard Cite

show abstract

“…Одним із перспективних способів поділу компонентів зернового матеріалу за аеродинамічними властивостями є тонкошарова пневмоінерційна сепарація [1][2][3], в основу якої покладено швидкісну подачу зерна в повітряний потік, за протитечієвою схемою. Використання цього перспективного принципу дозволило свого часу розробити ряд ефективних установок для поділу дрібнодисперсного зернового вороху [20][21][22][23][24]…”

Section: анализ неравномерности скорости воздушного потока на траектоunclassified

Analysis of the influence of non-uniformity of air flow velocity on the trajectory of grain particles motion in a pneumatic inertial separator

Kotov¹,

Stepanenko²

2019

M&EAgri

View full text Add to dashboard Cite

Purpose. Determination of influence of non-uniform velocity field of air in horizontal channel of pneumatic inertial separator on efficiency of separation of components of grain material into fractions by aerodynamic properties. Methods. The specificity of the issue under consideration determines the analytical method of study based on the compilation and analysis of kinetic equations of motion of a particle, in the form of a ball in the air flow of a horizontal channel with uneven distribution of air flow velocity over the height of the pneumatic channel. Results. The mathematical description of the motion of particles of the grain mixture in the chamber of the gravitational-air separator under the action of air flow of variable speed air is given. The trajectories of motion of particles of different size were obtained. The obtained equation of motion of a particle under the action of air flow allows to determine the dependence of the speed of movement of the material in the layer of grain material on a number of factors: geometric parameters of the separator, the angle of feed of the material, the initial kinematic mode of the material, as well as the coefficient of sail of the particle. The technological possibilities of the proposed method of grain separation under the action of air flow are theoretically substantiated and the influence on the technological parameters of the basic parameters: air velocity, coefficient of live section taking into account the layer thickness of the material entering the channel is established. Conclusions 1.On the basis of the analysis of the force interaction of the grain material particle with the air stream, an advanced mathematical model of particle motion in a non-uniform field of air flow velocity in the horizontal channel was obtained. 2.The real possibility of controlling the process of separation of components of grain material by aerodynamic properties by changing the plot of the air flow velocity along the height of the horizontal channel is determined. Keywords: variable air velocity, trajectory, resistance of forces, fractions, air flow, wind factor, fractionation process, grain mixture, air separator.

show abstract

“…Variation of centrifugal forces Fcf of unbalance masses depending on the angle α of overlap of the non-balanced eccentric masses[11] …”

mentioning

confidence: 99%

Experimental research on influence of functional parameters of combined installations designed at separating the impurities out of cereal seeds

et al. 2019

View full text Add to dashboard Cite

The paper presents the experimental installation, the methodology and measuring apparatus used for experimental research of qualitative indexes of impurities separation out of grain seeds for combined separating systems (according to specific weight and aerodynamic properties of seeds). The experimental installation used was composed of a gravimetric separator with mechanical shaker with unbalanced masses (mounted on the platform working surface) and an aspiration installation with fan. The experimental research has aimed at quantitative and qualitative influence on separation quality index of the following operating parameters: material flow rate of shaking separator, the air flow of aspiration installation, tilting work surface, work surface oscillation amplitude. Based on data obtained by measurements and qualitative indicators the separating process indexes have been determined, namely: degree of impurities separation, degree of good seeds loss, as well as, the separation quality index for different types of combinations of separation installation parameters.

show abstract

The Influence of Basic Parameters of Separating Conveyor Operation on Grain Cleaning Quality

Cited by 13 publications

References 3 publications

Patterns of influence exerted by the side walls of a vibratory sieve on the motion of a loose mixture flow

Patterns of influence exerted by the side walls of a vibratory sieve on the motion of a loose mixture flow

Analysis of the influence of non-uniformity of air flow velocity on the trajectory of grain particles motion in a pneumatic inertial separator

Experimental research on influence of functional parameters of combined installations designed at separating the impurities out of cereal seeds

Contact Info

Product

Resources

About