Analysis of asymmetrical effect of tension forces in conveyor belt on the idler roll contact forces in the idler housing

Molnár, Vieroslav; Fedorko, Gabriel; Stehlíková, Beáta; Tomašková, Marianna; Hulínová, Zdenka

doi:10.1016/j.measurement.2014.02.035

Cited by 38 publications

(24 citation statements)

References 21 publications

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“…These sequences have the same dispersion (8). (8) Dispersion D b of the sequence b n is a sum of dispersions of independent random sequences a n and a n+1 [29]: (9) then: (10) The result has been verified by the Monte Carlo method on 1000 random samples generated by the random numbers generator. A standard deviation ratio from the Monte Carlo experiment is 1.4076.…”

Section: New Proceduresmentioning

confidence: 98%

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Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Stejskal

Dovica

Demeč

et al. 2017

Adv. Sci. Technol. Res. J.

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The aim of this paper is to draw attention to more reliable verification method of positioning accuracy. The improvement lies in mathematical elimination of thermal impact during the measurement process. This thermal impact, always present during the motion of movable parts, is of a special systemic character. It increases the indefiniteness of measurement of the classic measurement method. This measurement uncertainty can be reduced by implementing the procedure introduced in this paper. The reduction can be achieved by separating the temperature impact from other sources of inaccuracy. Such separation is a very new solution. The methodology relies on mathematical processing and does not depend on the manner of accuracy measurement. The evaluation method also yields diagnostic information on the machine's condition. The experiments were performed with the use of laser interferometer.

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Section: New Proceduresmentioning

confidence: 98%

“…This is a rule applicable to machinery in general. The topic is discussed in [7,8,9,10,11]. Experiment planning can also significantly contribute to saving time in obtaining suitable results [12].…”

Section: Introductionmentioning

confidence: 99%

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Stejskal

Dovica

Demeč

et al. 2017

Adv. Sci. Technol. Res. J.

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“…This load is taken into consideration when solving the contact problem with the purpose of determining the force of resistance to the motion due to the support rollers being pushed into the top cover of the tubular shape belt [8], [12] and [13].…”

Section: Th Daaam International Symposium On Intelligent Manufacturmentioning

confidence: 99%

Determining the Load on Support Rollers the Pipe Conveyor Belt

Maksarov¹,

Zlotnikov²,

Olt³

2017

DAAAM Proceedings

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The pipe conveyor belt design principles are considered in these pages. A method of calculation is suggested for the load on the base support rollers resulting from the bending of the initially plane belt into a cylindrical shell for the circular cross-section upon the elasticity theory with a non-uniform modulus, considering elongation and contraction variations in the elasticity modulus of the belt inserts which are positioned above and below the neutral surface at bending.

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“…The calculations should take into account the dynamic effects arising from the storage and transport of bulk materials. When designing transport and storage facilities, it is appropriate to use studies and knowledge from various areas of transport and handling equipment designed not only for bulk materials [3,4,5,6,7,8,9]. In this case, the problem of optimisation of the existing underground hopper and the drag chain conveyor is being solved.…”

Section: Introductionmentioning

confidence: 99%

Feeder Type Optimisation for the Plain Flow Discharge Process of an Underground Hopper by Discrete Element Modelling

Nečas

Hlosta

Žurovec

et al. 2017

Adv. Sci. Technol. Res. J.

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This paper describes optimisation of a conveyor from an underground hopper intended for a coal transfer station. The original solution was designed with a chain conveyor encountered operational problems that have limited its continuous operation. The Discrete Element Modeling (DEM) was chosen to optimise the transport. DEM simulations allow device design modifications directly in the 3D CAD model, and then the simulation makes it possible to evaluate whether the adjustment was successful. By simulating the initial state of coal extraction using a chain conveyor, trouble spots were identified that caused operational failures. The main problem has been the increased resistance during removal of material from the underground hopper. Revealed resistances against material movement were not considered in the original design at all. In the next step, structural modifications of problematic nodes were made. For example, the following changes have been made: reduction of storage space or installation of passive elements into the interior of the underground hopper. These modifications made were not effective enough, so the type of the conveyor was changed from a drag chain conveyor to a belt conveyor. The simulation of the material extraction using a belt conveyor showed a significant reduction in resistance parameters while maintaining the required transport performance.

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Analysis of asymmetrical effect of tension forces in conveyor belt on the idler roll contact forces in the idler housing

Cited by 38 publications

References 21 publications

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Elimination of Thermal Drift in Measuring the Positioning Accuracy of a Three Axis Milling Machine

Determining the Load on Support Rollers the Pipe Conveyor Belt

Feeder Type Optimisation for the Plain Flow Discharge Process of an Underground Hopper by Discrete Element Modelling

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