scholarly journals Segregation of the bulk cargo on a belt conveyor under the vibro-pulse impact

2021 ◽  
Vol 303 ◽  
pp. 01044
Author(s):  
Alexander Zakharov ◽  
Natalya Erofeeva
Keyword(s):  
Negative Impact ◽  
Conveyor Belt ◽  
Shock Pulse ◽  
Belt Conveyor ◽  
Lower Face ◽  
Rotation Direction ◽  
Impact Device ◽  
Characteristic Points ◽  
Linear Sections ◽  
Shock Pulses

The dynamics of interaction of the large lumps of the bulk cargo with a conveyor belt while passing through roller supports of the conveyor linear sections is often a cause of damage on the conveyor belt. In order to reduce the negative impact it is proposed to isolate the conveyor belt surface from the large lumps by filling small fractions of the bulk cargo by means of adding a shock device to the conveyor structure that causes increased segregation of the bulk cargo. A mathematical model of the segregation of the bulk cargo located on the conveyor belt and in zone of impact of the shock pulses has been developed. The model considers a change in the rotation direction of the large lump when applying shock pulses to the characteristic points of the lump lower face. Herewith it takes into consideration weakening of the shock pulse by a layer of the bulk cargo small fractions. The presented model has received experimental confirmation. Analytically and experimentally the height of filling of the bulk cargo small fractions under a large lump when passing the vibrating impact device located on the conveyor belt has been determined.

scholarly journals Non-reloading coal transportation in the eastern inclined shaft of “Raspadskaya” mine

2021 ◽  
Vol 303 ◽  
pp. 01027
Author(s):  
Vadim Yurchenko ◽  
Valeriy Nesterov
Keyword(s):  
Cross Section ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Drive Power ◽  
Belt Drives ◽  
Belt Speed ◽  
Load Carrying ◽  
Drive Belt ◽  
Material Load ◽  
Belt Width

The planned increase in the mine output from 6.5 to 13.6 million tons per year has set the task of reconstructing a conveyor transport in the eastern inclined shaft of the Raspadskaya mine. The roadway length is 4100 m; the reduced inclination angle is +7°40´. An attempt was made to combine all the positive global practices in one project: the distribution of drive power along the length of a conveyor belt, minimizing the capital cost of implementation. Within the framework of this article, an approach to choosing the speed of a con-veyor belt is discussed, a comparative analysis of the two most com-mon types of intermediate “tripper-type” and “belt-to-belt” drives is given; calculation of a belt conveyor with intermediate “belt-to-belt” drives providing non-reloading conveying in the eastern inclined shaft. Pull force calculations showed that a conveyor belt with four interme-diate “belt-to-belt” drives can be implemented as follows: belt width – 1400 mm, belt speed – 4.0 m/s, mono-material load-carrying belt – PVG-4000, mono-material drive belt – PVG-1400, 2-pulley drive units when mounted on one side: head drive power – 2×1000 = 2000 kW, intermediate drive power – 2×1600 = 3200 kW. Thus, the use of a conveyor belt with four intermediate “belt-to-belt” drives in the in-clined shaft will give the following results: non-reloading transporta-tion over the entire length of the shaft, reducing the additional degra-dation of transported coal due to the exclusion of reloading points, minimizing costs through the use of less durable belts, minimizing costs of sinking an inclined shaft of a smaller cross-section.

scholarly journals Dynamic Behaviour of a Conveyor Belt Considering Non-Uniform Bulk Material Distribution for Speed Control

2020 ◽  
Vol 10 (13) ◽  
pp. 4436
Author(s):  
Fei Zeng ◽  
Cheng Yan ◽  
Qing Wu ◽  
Tao Wang
Keyword(s):  
Dynamic Model ◽  
High Precision ◽  
Material Flow ◽  
Laser Scanning ◽  
Bulk Material ◽  
Speed Control ◽  
Conveyor Belt ◽  
Distribution Model ◽  
Material Distribution ◽  
Belt Conveyor

For the conveyor belt, variable material flow influences the energy efficiency of the speed control technology significantly. The fluctuation of material flow on the conveyor belt will lead to the detrimental vibrations on both the belt and the conveyor while the conveyor works at certain speeds. In order to improve the model inaccuracy caused by the uniform bulk material flow assumption in the current conveyor belt model, the paper establishes a high-precision dynamic model that can consider speed control of a conveyor belt under non-uniform bulk material transportation. In this dynamic model, a non-uniform bulk material distribution model is firstly proposed based on laser scanning technology. Then, a high-precision longitudinal dynamic model is proposed to investigate the dynamic behavior of a belt conveyor. Considering the micro-units of actual load on a conveyor belt, it can well describe the transient state of the conveyor belt. These models can be used to determine the optimal speed for safety and energy conservation in operation. Experimental results are used to validate the proposed dynamic model for analyzing belt mechanical behavior under non-uniform bulk material distribution on the belt. The results show that the proposed models can be used for optimizing the operating procedures of belt conveyor systems.

Session 9: Bulk Mail Conveying: Twin-Band Rising Conveyor

1969 ◽  
Vol 184 (8) ◽  
pp. 260-264
Author(s):  
A. J. Wilkinson
Keyword(s):  
Conveyor Belt ◽  
Confined Space ◽  
Belt Conveyor ◽  
Random Load ◽  
Twin Band ◽  
Load Conditions

It is often necessary to convey and elevate objects of widely varying characteristics in a confined space with random load conditions. The twin-band rising conveyor is essentially a steeply inclined belt conveyor which carries and controls articles on inclines of up to 60°. In order to control satisfactorily articles handled on such a conveyor, a continuous and weighted cover band, which is driven in synchronism with the conveyor belt, is employed. A horizontal toe band, which may be manually or automatically loaded, is used to aid efficient introduction to the articles between the carrying and weighted belts.

Rotating Resistance of Belt Conveyor Idler Rolls

2015 ◽  
Vol 138 (4) ◽  
Author(s):  
Craig A. Wheeler
Keyword(s):  
Conveyor Belt ◽  
Operating Conditions ◽  
Viscous Drag ◽  
Resistance Force ◽  
Belt Conveyor ◽  
Conveyor System ◽  
Theoretical Methods ◽  
Primary Function ◽  
Lip Seals ◽  
Rolling Elements

The primary function of idler rolls in a belt conveyor system is to support the conveyor belt along its length. Predicting the cumulative resistance of idler rolls is vitally important in calculating the belt tension and therefore power requirements of a system, particularly on long overland conveyors where there are typically more than one thousand idler rolls per kilometer of belt. The rotating resistance occurs due to the friction of the rolling elements in the bearings, the viscous drag of the lubricant, and the friction of the contact lip seals. This paper provides theoretical methods to calculate each component of the rotating resistance and describes an apparatus designed to measure this resistance force under simulated operating conditions.

Mathematical Model for Determining the Lifetime of Conveyor Belts Depending on some Selected Parameters

2014 ◽  
Vol 683 ◽  
pp. 147-152
Author(s):  
Miriam Andrejiová ◽  
Anna Grinčová ◽  
Anna Pavlisková
Keyword(s):  
Mathematical Model ◽  
Statistical Methods ◽  
Paint Layer ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Layer Width ◽  
Conveyor Belts ◽  
Belt Conveyors ◽  
Transported Material ◽  
Optimal Construction

In the last years, belt conveyors belong to the most frequently used means of transport in various industries. The most important component of the belt conveyor is the conveyor belt. Therefore, it is necessary to pay more attention also to optimal lifetime of conveyor belts. Conveyor belt lifetime is a very complicated issue. It is affected by plenty of factors, including above all the quality structure of the belt conveyor, optimal construction, production, and properties of the conveyor belt as such, adequate solution of conveyance route shifting, reasonable maintenance, and quality repairs of conveyor belts. The paper deals with the exploring the lifetime of conveyor belts depending from on some selected parameters obtained from the operating records of practice (thickness of paint layer, width and length of the belt, conveyor speed and quantity of transported material) with using appropriate mathematical - statistical methods.

Analysis of Speed and Belt Deviation of the Conveyor Belt

2011 ◽  
Vol 339 ◽  
pp. 444-447
Author(s):  
Qiu Yi Chu ◽  
Guo Ying Meng ◽  
Xun Fan
Keyword(s):  
Numerical Simulation ◽  
Service Life ◽  
Theoretical Analysis ◽  
Mechanical Model ◽  
Rotation Speed ◽  
Conveyor Belt ◽  
Movement Speed ◽  
Belt Conveyor ◽  
Belt Speed ◽  
Great Harm

Deviated belt will cause great harm, which will not only reduce its service life, but also will lead to the machine damage and personal casualty. This paper analyzes the reasons for belt deviation and establishes the mechanical model of a conveyor belt. The theoretical analysis and numerical simulation are adopted in this article to analyze and research the speed when the belt is deviated, obtain the relation between the transversal movement speed of belt and front offset angle of a idler, idler rotation speed and belt speed, and provide the deviation correction and prevention of belt conveyor with theoretical guidance.

Parametric Finite Element Analysis on Key Parts of the Conveyor

2011 ◽  
Vol 101-102 ◽  
pp. 755-758 ◽  
Author(s):  
Chun Sheng Yang
Keyword(s):  
Mechanical Characteristics ◽  
Bulk Material ◽  
Viscoelastic Model ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Element Analysis ◽  
Conveyor System ◽  
Belt Conveyors ◽  
Parametric Finite Element Analysis ◽  
Research Situation

Belt conveyors are the major equipments for bulk material transportation.This paper analyses the static and dynamic behaviours of the belt, and establishes the dynamic elastic modulus. By analyzing the characteristics of the Kelvin and Maxwell viscoelastic model, the former is selected as the conveyor belt model as it can more realistically reflect the mechanical characteristics of the conveyor system. This paper introduces the development of the belt conveyor, and analyzes the current research situation at home and abroad.

scholarly journals Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography

2021 ◽  
Vol 11 (22) ◽  
pp. 10766
Author(s):  
Fei Zeng ◽  
Sheng Zhang ◽  
Tao Wang ◽  
Qing Wu
Keyword(s):  
Crack Detection ◽  
Signal To Noise Ratio ◽  
Thermal Response ◽  
Infrared Camera ◽  
Conveyor Belt ◽  
Detection Accuracy ◽  
Belt Conveyor ◽  
Thermal Images ◽  
High Speeds ◽  
Conveyor Belts

For a belt conveyor, a belt with mini-cracks influences the safety of the operation of the belt conveyor devices significantly. The lumpy material rubbing against a belt with mini-cracks will lead to detrimental tears on the belt while the conveyor works at high speeds. In order to detect mini-cracks in a timely manner, before the occurrence of large tears, a new mini-crack detection method for conveyor belts based on laser excited thermography is proposed. A laser beam is applied to generate a heat wave on the belt surface, so the corresponding thermal images can be recorded by an infrared camera. Then, an algorithm for extracting and fusing the features of mini-crack belt’s thermal images is firstly proposed by using time sequence analysis. It could transform multiple sequential thermal images into a single thermal image according to the frame difference method, so that the infrared thermal response of the mini-crack over time could be recorded quickly. To reveal the features of mini-crack, the power function image enhancement algorithm is proposed. After that, the threshold segmentation and Hough transform algorithm are used to determine the size of the mini-crack. The experimental results show that the mini-cracks with length of 50–140 mm, width of 1–10 mm, and depth of 5 mm can be successfully detected, and the detection accuracy could reach 96%. The detection results of different sizes of mini-crack show that the laser excited thermography has high damage sensitivity (1 mm diameter mini-crack detection), high accuracy (96%), lower power consumption (15 W laser excitation), and high SNR (signal-to-noise ratio).

scholarly journals Research of lateral force of pipe conveyor belt’s vertical transport section

2016 ◽  
Vol 37 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Shuang Wang ◽  
Yong-Cun Guo ◽  
De-Yong Li ◽  
Kun Hu
Keyword(s):  
Distribution Curve ◽  
Fractal Theory ◽  
Lateral Force ◽  
Conveyor Belt ◽  
Experimental Result ◽  
Belt Conveyor ◽  
Nonlinear Variation ◽  
Underground Transportation ◽  
Working Out ◽  
Selection Of

In order to release the lateral force of pipe conveyor belt in vertical transportation, the thesis had a study of the lateral force of the conveyor belt. By making use of Janssen Principles and fractal theory, based on reasonable simplification, the author established a mathematical model of the lateral force in vertical transportation, and with the research foundation of the pipe belt conveyor for underground transportation, through solution analysis, the author found out that the change of material diameter would lead to nonlinear variation of the lateral force of the conveyor belt. Under the circumstances of different material diameter, discrete element method was adopted to simulate the lateral force of the conveyor belt, thus working out the distribution curve chart of the lateral force. To verify the reliability of the theory, the author built an experimental platform for pipe conveyor belt in vertical transportation, and experimented with five groups of materials in different diameter, working out the strain of lateral force of the characteristic conveyor belt; by comparing the theoretical result, the simulation result and the experimental result, it showed that the solution to relieving lateral force through optimization selection of material diameter put forward in this thesis was reasonable and effective. It provides theoretical reference for the design of pipe belt conveyor.

scholarly journals Establishing failure patterns of a Belt Conveyor System configuration

2021 ◽  
Vol 9 (10) ◽  
pp. 1030-1034
Author(s):  
Olutayo Opeyemi Ogunmilua
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Mining Industry ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Specific Knowledge ◽  
Conveyor System ◽  
Tree Analysis ◽  
Failure Patterns ◽  
System 2

Abstract: The conveyor belt is one of the most operational critical equipment’s in the mining industry, they are mostly used in the transportation of crushed materials from the crushing station to where there’ll be further processed. Due to the increasing complexity of belt conveyor systems, managing their integrity has become even more difficult, as they are now used across various industries, environments and carry materials of different weight variations, leaving them susceptible to failures (1). This paper provides an industry specific knowledge on belt conveyor systems, their respective components, and how they are configured using fault tree analysis to predict the different branches of event that can contribute to the failure of a belt conveyor system. The use of fault tree analysis sheds more light on how cascading failures can occur, where the failure of one component leads to the failure of the overall system. (2) Keywords: RCFA, FMEA Opex, FTA, Capex, Eca, Ttf, Ttr.

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