Measurement of Amount for Steel Abrasive Material Transported by Special Scraper Conveyor

Fedorko, Gabriel; Nečas, Jan; Zegzulka, Jiří; Gelnar, Daniel; Molnár, Vieroslav; Tomašková, Marianna

doi:10.3390/app11041852

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…Long-wall comprehensive mining face mainly consists of coal mining machine, scraper conveyor, hydraulic support and other auxiliary equipment, and scraper conveyor is the most important transportation equipment in comprehensive mining equipment [2,3]. The working environment of scraper conveyor is more complicated, in the process of coal mining there are often large pieces of coal rock collapsed to the scraper conveyor, the chain drive system of the scraper conveyor caused by the obvious impact, which seriously affects the dynamics characteristics of the scraper conveyor, and in serious cases, it will even make the scraper conveyor broken chain, chain jamming and other failures [4,5]. Therefore, it is necessary to carry out experimental research on the dynamic characteristics of scraper conveyor under the action of impact load, which can provide theoretical guidance for the structural design and optimization of scraper conveyor, and is of great significance for the safe and stable operation of scraper conveyor.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

Jiang,

Lv,

Zeng

et al. 2024

PLoS ONE

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Scraper conveyor is the most important transportation equipment in the comprehensive mining equipment, and the chain drive system is its core subsystem, its dynamic characteristics will significantly affect the efficiency of coal transportation in the comprehensive mining face. In this paper, the dynamic characteristics of chain drive system when impacted by falling coal are investigated by means of test. The impact test bench of scraper conveyor was set up to analyze the effects of chain speed, impact height and impact load mass on the dynamic characteristics of the chain drive system of scraper conveyor under the working conditions of unloaded and loaded. The results show that the longitudinal vibration of the scraper conveyor is most obvious when it is impacted by the falling coal, and the chain speed, impact height and impact load mass of the scraper conveyor all play an excitation role on the vibration of the chain drive system, and the vibration of the chain ring is the most intense in the chain drive system, and the loaded coal pile conveyed on the scraper conveyor plays an inhibiting role on the vibration of the chain drive system. This study can help to identify the location where the scraper conveyor fails first in the impact condition, so as to provide a basis for its structural design and improvement, which is of great significance for the stable operation and structural optimization of the scraper conveyor.

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Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

Jiang,

Lv,

Zeng

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Coal is the primary energy source in China. Longwall mining technology is the most efficient and widely used technology in coal mining today [1][2][3][4]. The longwall fully mechanized mining face comprises hydraulic support, a scraper conveyor, a shearer, and other auxiliary equipment [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

et al. 2022

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A scraper conveyor is important in coal mining. During operation, its working performance is affected by chain speed fluctuations, terrain fluctuations, and load changes. Thus, evaluating the influence of these factors on the dynamic properties of a scraper conveyor is important. This study first built a dynamic property test bench. Then, the vibration signals of the reducer output shaft were measured under various chain speed, terrain, and load conditions. Finally, the dynamic properties of a scraper conveyor were evaluated by conducting a frequency domain analysis of the measured vibration signals. The results show that the output shaft of the motor, the second shaft, and the second-stage meshing gear of the reducer are sensitive to external factors. Under the terrain conditions of “horizontal + vertical” bending, the middle chute was the most sensitive to the meshing frequency of the sprocket chain. This type of condition had a significant influence on the scraping phenomenon of the scraper and the middle chute. Under various load conditions, the amplitude of each shaft of the reducer decreased, especially the amplitude of the motor output shaft, but the scraping amplitude of the scraper and middle chute greatly increased. This study is of great significance for improving the dynamic properties and structural optimization of scraper conveyors.

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“…When the load is light or no load, the high-speed operation of the belt conveyor system will seriously wear the mechanical transmission system, shorten the service life of the equipment, and cause a lot of waste of electric energy. When the conveyor is overloaded, it will not only accelerate the aging of the conveyor system, but also cause the coal outlet of the scraper conveyor to be congested [1][2][3][4]. Figure 2 shows the coal flow on the scraper conveyor.…”

Section: Introductionmentioning

confidence: 99%

A Scraper Conveyor Coal Flow Monitoring Method Based on Speckle Structured Light Data

et al. 2022

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Aiming at the problem of serious shutdowns of conveyors caused by abnormal coal flow of scraper conveyors, a coal flow monitoring method based on speckle structured light is proposed. The point cloud data of the coal body on the scraper conveyor is collected through the speckle structured light acquisition system. Then, the proposed PDS-Algorithm (Planar Density Simplification Algorithm) is used to complete the simplification and differentiation of the collected point cloud data, which provides a basis for constructing geometric characteristics of coal flow lineament. This paper uses the processed point cloud data to calculate the volume of the coal mass and monitor the coal flow of the scraper conveyor. Finally, this method is used in the detection of abnormal coal flow of a coal mine scraper conveyor, and the results show that the proposed abnormal flow monitoring method can meet the accuracy and real-time requirements of coal mine abnormal alarms.

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Measurement of Amount for Steel Abrasive Material Transported by Special Scraper Conveyor

Cited by 9 publications

References 15 publications

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

A Scraper Conveyor Coal Flow Monitoring Method Based on Speckle Structured Light Data

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