scholarly journals Simulation of unloading processes of short dump belt conveyors with speed control belt movement

2021 ◽  
Vol 7 (4) ◽  
pp. 348-355
Author(s):  
A.A. Romanovich ◽  
◽  
A.V. Grishin ◽  
I.A. Denisov ◽  
◽  
...  
Keyword(s):  
Tilt Angle ◽  
Production Line ◽  
Building Materials ◽  
Speed Control ◽  
Belt Speed ◽  
Entire Line ◽  
Belt Conveyors ◽  
A Chain

Short dump belt conveyors are used to create bulk cargo both as an integral part of technological machines in the processing of building materials, and as vehicles in a chain of conveyors for transporting bulk cargo in accordance with the logistics of open warehouses. When implementing mechanization schemes for open warehouses, depending on the degree of variability of the cargo flow in the structures of such conveyors, drives can be used that allow regulating the speed of the belts, thereby controlling the productivity of the entire line. Often, short belt conveyors are not equipped with specialized unloading devices, which requires elaboration of the issues of movement of cargo particles during unloading, especially if the conveyor is operating in a production line. The article simulates the processes of unloading short dump belt conveyors when controlling the speed of the belt. Trajectories of movement of cargo particles for various parameters of conveyors are obtained: belt speed, conveyor tilt angle to the horizon, diameter of the unloading drum. It is shown that it is necessary to simulate unloading processes in all cases with belt speed control and conveyor operation without specialized unloading devices.

A Methodology to Predict Power Savings of Troughed Belt Conveyors by Speed Control

2011 ◽  
Vol 29 (1) ◽  
pp. 14-27 ◽  
Author(s):  
J. Hiltermann ◽  
G. Lodewijks ◽  
D. L. Schott ◽  
J. C. Rijsenbrij ◽  
J. A. J. M. Dekkers ◽  
...  
Keyword(s):  
Speed Control ◽  
Belt Conveyors

Modern design of belt conveyors in the context of stability boundaries and chaos

1992 ◽  
Vol 338 (1651) ◽  
pp. 491-502 ◽  
Keyword(s):  
Initial Conditions ◽  
Nonlinear Resonance ◽  
Stability Boundaries ◽  
Belt Speed ◽  
Bearing Life ◽  
Amplitude Vibration ◽  
Large Amplitude Vibration ◽  
Belt Conveyors ◽  
The Stability ◽  
Two Parameters

Belt conveying of bulk materials has evolved to the point where the demands of the modern mine to increase capacity is limited by the ability of engineers to design dynamically stable conveyors. Belt speed and width are two parameters that may be varied in the design to provide the required material flow rate. For certain values of belt speed, width and tension, unstable transverse belt vibration has been observed. Large-amplitude vibration may be so severe that the life of the supporting idler bearings is reduced significantly due to dynamic loads. Monitoring idlers for bearing failure in modern conveyors with lengths up to 20 km is practically difficult since there may be as many as 20000 idler sets. Chaotic transverse belt vibrations occur for certain levels of excitation, further complicating the prediction of bearing life. Before conveyor installation, an estimate of the stability boundaries for resonance-free operation is an essential precursor to failure-free conveyor operation. Nonlinear resonance phenomena such as belt flap is sensitive to initial conditions. The effects of chaotic vibrations on the predictability of design stability is reviewed using some examples of forced vibrations.

Green operations of belt conveyors by means of speed control

2017 ◽  
Vol 188 ◽  
pp. 330-341 ◽  
Author(s):  
Daijie He ◽  
Yusong Pang ◽  
Gabriel Lodewijks
Keyword(s):  
Speed Control ◽  
Belt Conveyors

Fuzzy Controlled Energy Saving Solution for Large-Scale Belt Conveying Systems

2012 ◽  
Vol 260-261 ◽  
pp. 59-64 ◽  
Author(s):  
Yusong Pang ◽  
Gabriel Lodewijks ◽  
Dingena L. Schott
Keyword(s):  
Fuzzy Control ◽  
Large Scale ◽  
Loading Rate ◽  
Control Method ◽  
Discrete Control ◽  
Practical Reasons ◽  
Short Term ◽  
Belt Speed ◽  
Belt Conveyors ◽  
Fuzzy Control Algorithm

Belt conveyors generally run at designed nominal speed. When material loading rate is smaller than the nominal conveying capacity the belt is under the situation of being partially filled. It provides the potential of reducing energy consumption by means of adjusting the speed of the belt. For practical reasons discrete control is preferred to adjust the belt speed. This paper presents a fuzzy control method to improve the energy efficiency of large-scale belt conveying systems. Fuzzy logic is applied to represent the change of material loading rate. A fuzzy control algorithm is developed to optimize the adjustment of belt speed to avoid potential material spillage and material overload caused by the short-term material loading peaks. Energy savingsareestimated by computer simulation. Simulation model and outputare verified by practical measurement.

Belt speed control in a sintering plant using neural networks

1998 ◽  
Vol 69 (10-11) ◽  
pp. 398-405 ◽  
Author(s):  
Min Jang ◽  
Sungzoon Cho ◽  
Shinjae Lee ◽  
Yuhwa Kwon
Keyword(s):  
Neural Networks ◽  
Speed Control ◽  
Belt Speed ◽  
Sintering Plant

scholarly journals Healthy speed control of belt conveyors on conveying bulk materials

2018 ◽  
Vol 327 ◽  
pp. 408-419 ◽  
Author(s):  
Daijie He ◽  
Yusong Pang ◽  
Gabriel Lodewijks ◽  
Xiangwei Liu
Keyword(s):  
Speed Control ◽  
Bulk Materials ◽  
Belt Conveyors

scholarly journals Theoretical analysis of the impact of belt speed on indentation rolling resistance

2018 ◽  
Vol 71 ◽  
pp. 00004
Author(s):  
Lech Gładysiewicz ◽  
Martyna Konieczna
Keyword(s):  
High Reliability ◽  
Rolling Resistance ◽  
Theoretical Models ◽  
Phase Lag ◽  
Belt Conveyor ◽  
Unit Load ◽  
Belt Speed ◽  
Open Cast Mining ◽  
Belt Conveyors ◽  
The Impact

Belt conveyors, having high reliability and efficiency, are the main means of continuous transportation both in underground and in open-cast mining. Despite their numerous advantages, however, belt conveyors are expensive in maintenance. Therefore, improvements in the field of belt conveyor transportation largely focus on methods for lowering their power consumption. The energy consumption level of a belt conveyor depends on the motion resistances which occur during its operation. In the case of conveyors having lengths greater than 80 m, main resistances are the dominant component of motion resistances, and up to 60% of main resistances may be accounted for by the rolling resistances of the belt on idlers. Motion resistances, including rolling resistances, have long remained an object of research. Extensive laboratory tests and increasingly detailed theoretical models allow a better insight into the phenomena involved in the movement of the belt on the conveyor. Different research results place different weight on the influence of individual parameters (such as unit load or phase lag angle) on belt rolling resistance. The greatest inconsistencies, however, are observed in the analyses of belt speed impact, which is occasionally not even included in some models. This paper discusses the known and commonly used methods for determining the rolling resistances of the belt on idlers. It also proposes a new solution, which employs the analysis of strain variation in the belt for successive load cycles to determine whether belt speed has a direct influence on the value of rolling resistance.

Polyurethane MicroPCMs Containing N-Octadecane Applied in Building Materials Synthesized by Interfacial Polycondensation: Thermal Stability and Heat Absorption Simulation

2010 ◽  
Vol 96 ◽  
pp. 121-127 ◽  
Author(s):  
Jun Feng Su ◽  
Sheng Bao Wang ◽  
Zhen Huang ◽  
Jin Sheng Liang
Keyword(s):  
Thermal Stability ◽  
Building Materials ◽  
Phase Change Materials ◽  
Environmental Changes ◽  
Interfacial Polymerization ◽  
Heat Absorption ◽  
Practical Application ◽  
A Chain ◽  
Increasing Temperature ◽  
Thermal Absorption

Polyurethane microcapsules containing phase change materials (microPCMs) of n-octadecane applied in building materials were successfully synthesized by an interfacial polymerization in aqueous styrene-maleic anhydride (SMA) dispersion with diethylene triamine (DETA) as a chain extender reacting with toluene-2, 4-diisocyanate (TDI). FTIR and SEM morphologies results confirmed that the shell of microcapsules was polyurethane. Thermal stability and heat absorption simulation were investigated by TGA, DSC and an environmental simulation apparatus. TGA data showed that the decomposition of the microcapsules began at approximately 339oC at 2oC/min of increasing temperature and 320oC under 20% humidity, respectively. Shell structure was affected by environmental changes including temperature and humidity. The microcapsules will be compact and service longer time in practical application under gentle environmental changes. Also, the thermal absorption characterization was performed on a self-made design to improve the understanding of the thermal properties of dried microcapsules in practical application.

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