A Method of Additive Aerodynamic Calculation of the Friction Gear Classification Block

Makarov, V. N.; Potapov, V. N.; Davydov, S. Ya.; Makarov, N. V.

doi:10.1007/s11148-017-0098-8

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…The process of motion of each particle can be described by a mathematical model, including the equations of motion at each stage of separation and differential equations of motion of particles in a circulating air flow [6][7][8].…”

Section: Methodsmentioning

confidence: 99%

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Math modeling of particle movements in a friction separator

et al. 2020

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A mathematical model of particles movement of separated material in a friction separator is proposed. It includes equations of their movement at each stage of separation (along a rough inclined plane, on a curvilinear part of a springboard, impact of a particle on the surface of a drum, free motion before leaving the separation zone), and differential equations of particle movement in circulating air flow created by a rotating drum; Each of these phases of motion is described by a system of equations obtained on the basis of basic laws of mechanics. An analysis of a particle motion along aslope plane was carried out on the basis of the law on energy changes. Depending on the ratios of the recovery factor and instantaneous friction, being random variables and also the coordinates of a point impact the particle is possible to move along different trajectories with different initial conditions. The mathematical model of the process of separation of loose multicomponent materials on a friction drum-shelf separator makes it possible to investigate comprehensively the process of separation of particles on friction and elastic properties and to optimize the operating modes of the apparatus at relatively low costs without using macaques and prototypes and investigate them experimentally. On the basis of analysis of the proposed theories of particles motion, the main ways are formulated of further improvement of methodology for designing and creating friction devices.

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Section: Methodsmentioning

confidence: 99%

“…The behavior of particles in a rotating flow of the air obeying the Stokes law [3][4][5][6][7][8][9][10][11][12] is described in [8][9]. It is noted that the description of the motion in a finite form is impossible because of the complexity of systems of nonlinear differential equations:…”

Section: Methodsmentioning

confidence: 99%

Math modeling of particle movements in a friction separator

et al. 2020

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“…Gortsakalian, 1973). This provision is based on the idea, that milled peat, that has got into the nozzle under the action of an air jet, should not spontaneously roll down [6]. For milled peat, the angle of repose (friction at rest) is 32-45 °.…”

Section: Introductionmentioning

confidence: 99%

Study of the Dependence of the Air Flow Velocity on the Parameters of the Suction Nozzle Installation of the Peat Pneumatic Harvesting Machine

et al. 2021

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The parameters influencing the suction efficiency of peat pneumatic harvesters are listed. Among them are the distance from the nozzle to the underlying surface and the angle of the nozzle. Since there is very little information and recommendations on the rational values of these parameters, it was decided, using a specially designed installation, to conduct a laboratory experiment to assess the air flow velocity, depending on the distance from the nozzle, the angle of the nozzle and the height of the nozzle above the underlying surface of the deposit. The results of the experiment are presented. It is shown, that the rational angle of the nozzle at this stage of research can be considered an angle of 30±5°. In practice, it is impossible to reproduce the zero distance from the nozzle to the underlying surface; therefore, it is recommended to limit the height of 25 mm, which is equal to the maximum size of the conditioned peat crumb. It is noted, that for more accurate results, it is necessary to carry out the following series of experimental works to assess the parameters of suction of peat chips with specific physical and mechanical characteristics.

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“…This determines special social importance of prevention and localization of dust-air mixture explosions in mines and protection of personnel. Actions on maintaining dust conditions in mines are based on prevention of explosive dust accumulation and prevention of occurrence of high temperature source able to ignite dust aerosols [2,27].…”

Section: Introductionmentioning

confidence: 99%