scholarly journals Optimizing service life of conveyor belts while transporting bulk load

2019 ◽  
Vol 109 ◽  
pp. 00057
Author(s):  
Vitalii Monastyrskyi ◽  
Serhii Monastyrskyi ◽  
Borys Mostovyi
Keyword(s):  
Service Life ◽  
Objective Function ◽  
Bulk Material ◽  
Conveyor Belt ◽  
Special Device ◽  
Direct Flow ◽  
Conveyor Belts ◽  
Bulk Load ◽  
Minimum Objective Function ◽  
Motion Plane

The paper considers problems concerning optimization of service life of a conveyor belt in terms of its bulk material loading. Statement of the problem of belt life optimization is in the determining minimum of difference between squared velocity of a conveyor belt and projection of horizontal component of the load velocity when it contacts a belt onto the belt motion plane. The problem was solved numerically taking into consideration the objective function, varied parameters, and their limitation. Cases of direct-flow loading and loading with the help of special devices with straight and curved trough profiles have been analyzed. Regularities of changes in the belt service life due to significant factors in terms of direct-flow loading and loading with special device have been obtained to perform comparative analysis of different variants in terms of similar value of the objective function. The variants with maximum belt life and minimum objective function have been selected. For short conveyors, in terms of direct-flow loading, belt life decreases by 1.5–2.0 times comparing to the use of a loading device, and in terms of long conveyors, it decreases by 5–6 times, if value of the objective function is 0.5–1.0 m2/s2.

scholarly journals Determination of the limiting angle of inclination of tubular belt conveyor

2020 ◽  
Vol 168 ◽  
pp. 00047
Author(s):  
Ruslan Kiriia ◽  
Andrii Smirnov ◽  
Tetiana Zhyhula ◽  
Todor Zhelyazov
Keyword(s):  
Internal Friction ◽  
Equilibrium State ◽  
Bulk Material ◽  
Conveyor Belt ◽  
Belt Conveyor ◽  
Angle Of Internal Friction ◽  
Angle Of Friction ◽  
Bulk Load ◽  
Belt Conveyors

Currently, the widespread use of tubular belt conveyors is constrained by insufficient justification of the conveyor parameters. In the work, on the basis of the theory of the limiting equilibrium state of bulk load, equations of equilibrium of load on the belt of an inclined tubular conveyor are obtained. It is assumed that the belt was a rigid cylinder filled with bulk material in extreme equilibrium. Based on the obtained equilibrium equation, the analytical dependences of the limiting angle of inclination of the belt conveyor with a tubular belt on the degree of unfilling with the bulk load of the belt and the properties of the bulk load are found. From the analysis of these dependencies it follows that the limiting angle of inclination of the tubular belt conveyor depends on the angle of internal friction of the transported load, the angle of friction of the load on the conveyor belt, the angle of unfilling of the belt with load and does not depend on the radius of the conveyor belt.

scholarly journals Sustainable quality of conveyor belts using an integrated knowledge system to support decision-making

2021 ◽  
pp. 117-126
Keyword(s):  
Service Life ◽  
Economic Indicator ◽  
Conveyor Belt ◽  
Knowledge System ◽  
Comprehensive Knowledge ◽  
Conveyor Belts ◽  
Integrated Knowledge System ◽  
Belt Conveyors ◽  
Integrated Knowledge

Environmentally friendly conveyor belts are a modification of conventional conveyor belts. Conveyor belts of the Ecotubelt type enclosed in the shape of a pipe are the most important construction element of hose conveyors, which represent an ecological replacement of classic belt conveyors. Their closed conveyor belt in the shape of a hose allows you to transport material with minimal environmental pollution around the conveyor. A long-term problem for the users of these conveyor belts in the world is their maximum use with regard to their service life within the life cycle of the equipment that uses the conveyor belts. In order to achieve a sustainable quality of conveyor belts related to their service life, it is necessary to propose new procedures for evaluating the quality of conveyor belts in terms of their performance. The object of the research is closed conveyor belts of the Ecotubelt type with special construction. The aim of the research is aimed at gaining comprehensive knowledge about the performance of non-traditional closed conveyor belts in order to achieve their sustainable quality. The article presents a new approach to the evaluation of the quality of the Ecotubelt type conveyor belt using the concept of a knowledge system integrating multidisciplinary knowledge from rubber technologies, the results of laboratory and simulation experiments, as well as mathematical models. The integrated knowledge system includes quality-oriented subsystems within products, processes, services. The result of the model is an economic indicator (TCO) Total Cost Over ship index, which expresses the quality index for the purchase and use of a conveyor belt. The function of the proposed knowledge system for assessing the quality of the conveyor belt is to provide the user with adequate information from a huge amount of data and information, which will enable him to achieve a sustainable quality of classic open as well as closed conveyor belts.

scholarly journals Effect of anthropogenic aerosol emissions on precipitation in warm conveyor belts in the western North Pacific in winter – a model study with ECHAM6-HAM

2016 ◽  
Author(s):  
Hanna Joos ◽  
Erica Madonna ◽  
Kasja Witlox ◽  
Sylvaine Ferrachat ◽  
Heini Wernli ◽  
...  
Keyword(s):  
North Pacific ◽  
Aerosol Particles ◽  
Conveyor Belt ◽  
Radiation Balance ◽  
Anthropogenic Aerosol ◽  
Model Study ◽  
Conveyor Belts ◽  
Winter Time ◽  
Warm Conveyor Belts ◽  
Aerosol Emissions

Abstract. While there is a clear impact of aerosol particles on the radiation balance, whether and how aerosol particles influence precipitation is controversial. Here we use the ECHAM6-HAM global cli- mate model coupled to an aerosol module to analyse whether an impact of anthropogenic aerosol particles on the timing and the amount of precipitation from warm conveyor belts in low pressure systems in the winter time North Pacific can be detected. We conclude that while polluted warm con- veyor belt trajectories start with 5–10 times higher black carbon concentrations, the overall amount of precipitation is comparable in pre-industrial and present-day conditions. Precipitation formation is however supressed in the most polluted warm conveyor belt trajectories.

scholarly journals Coal Flowability Control on Preventing Spillage on Conveyor Belt Through Modeling and Simulation for Improving its Performance

2021 ◽  
Vol 90 (1) ◽  
pp. 130-145
Author(s):  
Sabri Bahrun ◽  
Mohd Shahrizan Yusoff ◽  
Mohamad Sazali Said ◽  
Azmi Hassan
Keyword(s):  
Bulk Material ◽  
Extraction Process ◽  
Conveyor Belt ◽  
Underground Mines ◽  
Mining Site ◽  
Dem Simulation ◽  
Conveyor System ◽  
Average Production ◽  
And Performance ◽  
Belt Conveyors

Belt conveyors are generally used in mining plant areas, both surface and underground mines. The belt conveyor is mainly applied to transport the extracted bulk material from the mining site to delivery. The effectiveness of the extraction process depends on the reliability and durability of the conveyor belt system. In addition, conveyor performance is very important specially to control material flowability to prevent spills or other operational disturbances to optimize production throughput. However, the transfer chute and settling zone can cause some problems during the transfer process, such as material spills. This problem can reduce the function and performance of the conveyor belt. This paper discusses a design model to reduce the problem of spillage in the settling zone. The model was developed by compiling the previous defecting data from the durability of the conveyor system, then analyzed using Discrete Element Method (DEM) software and compared with bulk characteristics. The initial performance of certain conveyors is only capable of serving with an average production of 76% of the designed capacity while energy is consumed at full load. By applying the DEM simulation result, the blade gate can reduce the peak angle break in the depositional zone before exiting. After the analysis is completed using DEM, the conveyor increases the average production to 95% of the designed capacity. In conclusion, controlling the maximum belt load without spillage will reduce interruption on conveyor belt operation and maintenance costs therefore increase plant reliability and availability.

scholarly journals Performance of Cans Classification System for Different Conveyor Belt Speed using Naïve Bayes

2020 ◽  
Vol 5 (4) ◽  
pp. 111
Author(s):  
Yulia Resti ◽  
Firmansyah Burlian ◽  
Irsyadi Yani
Keyword(s):  
Classification System ◽  
Naive Bayes ◽  
Conveyor Belt ◽  
Original Model ◽  
Model Based ◽  
Accuracy Level ◽  
Conveyor Belts ◽  
Sorting Process ◽  
Input Variables

The classification system in the sorting process in the can recycling industry can be made based on digital images by exploring the basic color pixel values ​​of images such as R, G, and B as variable inputs. In real time, the classification of cans in the sorting process occurs when cans placed on a conveyor belt move at a certain speed. This paper discusses the performance of can classification systems using the Naïve Bayes method. This method can handle all types of variables, including when all variables are continuous. Two types of conveyor belts are designed to get different speeds, and all images of the cans are captured on both conveyor belts. Two models of Bayes naive are built on the basis of the different distribution assumptions; the original model (all Gaussian distributed) and the model based on the best distribution. Performance of the classification system is built by dividing data into the learning data and the testing data with a composition of 50:50 in which each data is designed into 50 groups with different percentages on each type of cans using sampling technique without replacement. The results obtained are, first, the speed of the conveyor belt when capturing an image affects the pixel values of red, green, and blue and ultimately affects the results of the classification of cans. Second, not all input variables are Gaussian distributed. The classification system was built using assumption the best distribution model for each input variable has the better average accuracy level than the model that assumes all input variables are Gaussian distributed, and the accuracy level of classification on the first speeds of conveyor belt with a gear ratio of 12:30 and a diameter of 35 mm has an accuracy that is better than the other speed, both on the original model and the model based on the best distribution. However, it is necessary to test more statistical distribution models to obtain significant results.

scholarly journals Design of Device for Capturing Conveyor Belts and Calculation Method of Basic Parameters for Catchers

2019 ◽  
Vol 18 (3) ◽  
pp. 223-232
Author(s):  
A. V. Glebov ◽  
G. D. Karmaev
Keyword(s):  
Conveyor Belt ◽  
Design Parameters ◽  
Brake Shoe ◽  
Reverse Motion ◽  
Motion Time ◽  
Calculation Methodology ◽  
Patent Literature ◽  
Conveyor Belts ◽  
Scientific Technical ◽  
Belt Width

Results of the analysis of scientific, technical and patent literature show that while having a great variety of constructive implementation of the proposed catchers there are no efficient and sufficiently reliable devices for catching conveyor belts at its reverse motion which are relatively simple in design. This is proved by practical activity of enterprises involved in extraction and processing of commercial minerals and other industries. A new design of a conveyor belt catcher that meets most requirements for the given equipment has been developed at the Institute of Mining, Ural of Branch of the Russian Academy of Sciences and then it has been tested under industrial conditions. The design makes provision for retention of the conveyor belt at its reverse motion beyond free edges from transported material. Catching devices are installed on both sides of the belt. Braking action of the belt at the reverse motion occurs due to its friction interaction with a catcher friction shoe located above the belt, and an eccentric mounted on the frame under the belt. A friction shoe is made with a concave curved surface facing the belt. The paper presents a calculation methodology of main parameters for the proposed design of catcher conveyor belts that permits to determine a force catching a conveyor belt down and for every braking period distance which has been passed by the belt, value of its compression, value of braking force, braking time and acceleration of belt motion, time and length of the distance passed by the belt to its full stop, parameters of a catcher and supporting structures, and other parameters. The paper also provides results of calculations for main design parameters of catching devices with an inclined conveyor having a belt width of 1400 mm for two catcher design versions: with location of an eccentric under the belt, and a brake shoe over the belt (option I) and with location of the eccentric over the conveyor belt, and the brake friction shoe under the belt (option II).

Failure analysis of conveyor belt samples under tensile load

2018 ◽  
Vol 48 (8) ◽  
pp. 1364-1383 ◽  
Author(s):  
Gabriel Fedorko ◽  
Vieroslav Molnár ◽  
Peter Michalik ◽  
Miroslav Dovica ◽  
Tatiana Kelemenová ◽  
...  
Keyword(s):  
Internal Structure ◽  
Tensile Load ◽  
Relaxation Effect ◽  
Tensile Loading ◽  
Conveyor Belt ◽  
Loading Test ◽  
Strength Limit ◽  
Conveyor Belts ◽  
Tomographic Analysis

This paper is dedicated to investigating the properties of smooth conveyor belts through a tensile loading test, with the aim of examining the behavior of the inner structure of the belt samples. When the belt is subjected to a long-term strain, the belt relaxation effect is observed and changes may occur to the inner structure of the belt. The tensile test at constant velocity determines the load strength limit of the strip samples. The experiment has also shown the phenomenon of relaxation of the samples after the load. Metro-tomographic analysis is used to observe the behavior of the internal structure of the belt sample after the load. The obtained results indicate the initial damage of the inner structure of the conveyor belt occurred at the value of 2157 N. Under this load, the maximum damage size was 4.8 mm. This confirms the suitability of the method for tracking changes in the internal structure.

scholarly journals Optical Conveyor Belts for Chiral Discrimination: Influence of De-Phasing Parameter

2019 ◽  
Vol 9 (7) ◽  
pp. 1304
Author(s):  
Luis Carretero ◽  
Pablo Acebal ◽  
Salvador Blaya
Keyword(s):  
Numerical Analysis ◽  
Gaussian Beam ◽  
Enantiomeric Separation ◽  
Conveyor Belt ◽  
Separation Distance ◽  
Chiral Discrimination ◽  
Optimum Range ◽  
Conveyor Belts ◽  
Range Of Values ◽  
Maximum Separation

A numerical analysis is carried out of the influence of the de-phasing parameter of anoptical conveyor belt in the enantiomeric separation. The optical conveyor belt is obtained by theinterference of a Laguerre Gaussian and a Gaussian beam with different beam waists, which aretemporally de-phased. In order to obtain the maximum separation distance between enantiomers,we calculate the optimum range of values of the de-phasing parameter.

Sign in / Sign up

Export Citation Format

Share Document