Статті в журналах: "Scraper conveyor"

1

Dolipski, Marian, Piotr Cheluszka, Eryk Remiorz, and Piotr Sobota. "Follow-Up Chain Tension in an Armoured Face Conveyor / Nadążne Napinanie Łańcucha Zgrzebłowego W Przenośniku Ścianowym." Archives of Mining Sciences 60, no. 1 (March 1, 2015): 25–38. http://dx.doi.org/10.1515/amsc-2015-0002.

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Abstract Initial chain tension in armoured face conveyors, in which operating conditions vary constantly, should be adjusted automatically to adapt it to the needs arising. The manufacturers of such conveyors are now offering a possibility of equipping a conveyor with a drive with a telescopic trough enabling stepless change of the scraper chain contour by shifting the drive frame. The work presents the outcomes of computer investigations performed using an own mathematical model of an armoured face conveyor with a main and auxiliary drive equipped with a telescopic trough and an automatic initial chain tension adjustment system with the ASTEN algorithm. The ASTEN algorithm is responding to changes in scraper chain elongation caused by changes to conveyor configuration and also by a varying mined coal load resulting from interworking with a mining machine.

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2

Xia, Rui, Xuewen Wang, Bo Li, Xing Wei, and Zhaojian Yang. "The prediction of wear on a scraper conveyor chute affected by different factors based on the discrete element method." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 17 (July 7, 2019): 6229–39. http://dx.doi.org/10.1177/0954406219861130.

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During long-term operation, the scraper conveyor chute is seriously attrited by the friction of coal, gangue, and scraper chain. In this study, the discrete element method was applied to establish the bulk coal–scraper conveyor interaction analysis model to predict the wear of a scraper conveyor chute during the transporting process. The wear of the chute was investigated under various working conditions and bulk coal characteristics. Results indicated that the chute wear has a negative correlation with the laying angle of the scraper conveyor and increased with the chain speed. The wear was more severe as the increasing of gangue content, hardness, and size of the coal particles. In addition, the wear degree in different sections on the chute was predicted. Results showed that the section near the coal falling point underwent more intense collisions and impact and, thus, the wear was more serious at this location. The wear loss decreased with the increasing distance away from this point. This research can be used for predicting the wear of a scraper conveyor working under different mines. What’s more, the wear-resistant treatment can be applied on the particular areas according to the mine conditions based on this study.

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3

Shprekher, Dmitry, Gennady Babokin, Evgeny Kolesnikov, and Dmitry Ovsyannikov. "Research of Load Unbalance of a Two- Motor Variable Frequency Dtive for Scraper Conveyor." Известия высших учебных заведений. Электромеханика 64, no. 4-5 (2021): 37–45. http://dx.doi.org/10.17213/0136-3360-2021-4-5-37-45.

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The article analyzes the uneven loading of the scraper conveyor electric motors. The most common type of multi-motor conveyor is considered here: two-drive, with head and end drives connected through gearboxes and sprockets by an endless chain with scrapers. The simulation results are presented for three variants of com-binations of parameters of electric drives. It has been established that the use of a two-motor variable frequen-cy drive of a scraper conveyor powered by a single frequency converter inevitably entails uneven loading of the electric motors of the head and end drives. To eliminate this disadvantage, it is proposed to supply each electric motor from its own frequency converter. A system of automatic load balancing is proposed. The implementation and the result of the work of the load balancing system are carried out on a model in the Matlab / Simulink system.

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4

Wang, Yanping, and Shaoying Wang. "Coordinated Speed Planning Strategy of Scraper Conveyor and Shearer Based on Scraper Conveyor Loads Analysis." IOP Conference Series: Earth and Environmental Science 267 (June 8, 2019): 042044. http://dx.doi.org/10.1088/1755-1315/267/4/042044.

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5

Yakhin, Sergey, Il'gam Masalimov, Marat Nafikov, and Ramis Mardanov. "OPTIONS FOR PLANE-PARALLEL MOVEMENT OF GRAINS IN A SCRAPER CONVEYOR." Vestnik of Kazan State Agrarian University 14, no. 4 (April 12, 2020): 96–99. http://dx.doi.org/10.12737/2073-0462-2020-96-99.

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The kinematics of plane-parallel motion of a wheat or rye grain when moving in an inclined position in a scraper conveyor is considered. A kinematic diagram of the plane-parallel motion of the grain in the scraper conveyor was compiled, the position of the instantaneous center of the flat figure was determined, and options for the movement of grain in an inclined position at various possible positions of instantaneous center were considered. The profile of the grains is outlined by an elliptical curve. The point of contact of the elliptical profile of the caryopsis with the scraper makes a complex motion, while the horizontal speed of the scraper is portable for it, the sliding speed on the surface of the scraper is relative. The speed of the touch point of the grain with the pan is horizontal. For six possible positions of the instantaneous center, the directions of the velocities of the points of contact of the grains and the friction forces acting in them are determined. Grains of wheat or rye, moved in a scraper conveyor, in some cases can make plane-parallel movement. The point of contact of the elliptical profile of the caryopsis with the scraper makes a complex motion, while the horizontal speed of the scraper is portable for it, the sliding speed on the surface of the scraper is relative. The speed of the touch point 2 of the grain with the pan is horizontal.

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6

Zhang, Dong Sheng, Xiao Hong Liu, Jian Guo Shi, Jun Mao, and Zhong Li. "Scraper Conveyor Dynamic Modeling and Simulation." Advanced Materials Research 217-218 (March 2011): 426–30. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.426.

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Modeled nonlinearity, time-varying, dynamic coupling finite element model of scraper conveyor according to its actual working condition in the mining, studied the transmission mechanism of bulk material power and its parameters test methods，constructed the shape function of scraper conveyor circuitry, realized the computer automatic modeling, by the example carried on digital simulation of all of working condition such as starting, freely stoppage, abnormal load, chains blocked, the difference of chain’s pitch and the chain wheel polygon effect, and so on.

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7

Zhu, Xin Zhong, Yun Ting Zheng, and Guang Zhen Cheng. "The Spiral Collection-Scraper Conveyor Loader." Applied Mechanics and Materials 201-202 (October 2012): 147–50. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.147.

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This article is intended to provide a mobile loader, it is consist of spiral drum collecting device, chain transmission device, rotary table, expansion bend and mobile platform vehicle. design the rotary table which can rotate about a fixed axis relative to the mobile platform vehicle in the horizontal plane, and the expansion bend which can rotate about a fixed axis relative to the rotary table in the vertical plane, Combined with electrical control system and to realize the function requirements of the loader, it mainly used for coal mine underground sump cleaning, and focus on the structure, working principle and process of the spiral collection-scraper loader, point out the applicable working conditions and main features of the machine.

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8

Ren, W. J., L. Wang, Q. H. Mao, S. B. Jiang, and S. Huang. "Coupling Properties of Chain Drive System under Various and Eccentric Loads." International Journal of Simulation Modelling 19, no. 4 (December 5, 2020): 643–54. http://dx.doi.org/10.2507/ijsimm19-4-535.

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The chain drive system is a core subsystem of heavy scraper conveyors. During operation, violent oscillations of fluctuating loads on the chain and uneven loads at the two chain sides are observed, thus intensifying chain wear and even causing chain breakage. The dynamic properties of a chain drive system under various load and eccentric load were discussed thoroughly by combining dynamic and discrete element coupling analyses to improve the reliability of the scraper conveyor. Based on the discrete element method and multibody dynamic theory, a coupling analysis model of a scraper conveyor was constructed, and a simulation analysis on coal conveying process under various load and eccentric load was carried out. Simulation results demonstrate that the transverse vibration of the chain is positively related to coal conveying quantity, whereas longitudinal vibration is negatively correlated to coal conveying quantity. The transverse vibration rate under full loads is 513.62 % higher than that under idle condition, while the longitudinal vibration rate is 53.44 % lower. The effects of coals on transverse vibration and longitudinal vibration of a chain ring are opposite.

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9

Wojnar, Grzegorz, Rafał Burdzik, Andrzej N. Wieczorek, and Łukasz Konieczny. "Multidimensional Data Interpretation of Vibration Signals Registered in Different Locations for System Condition Monitoring of a Three-Stage Gear Transmission Operating under Difficult Conditions." Sensors 21, no. 23 (November 24, 2021): 7808. http://dx.doi.org/10.3390/s21237808.

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This article provides a discussion of the results of studies on the original system condition monitoring of a three-stage transmission with a bevel–cylindrical–planetary configuration installed in an experimental scraper conveyor. Due to the high vibroactivity of gear transmissions operating under the impact of a scraper conveyor’s chain drive, these unwanted effects of machine operating vibrations were assumed to be applied. For purposes of the study, vibrations were measured on the driving transmission housing in an idling scraper conveyor. The main purpose of the study was to establish the frequencies characteristic of the gear transmission, and to determine whether it was possible to run vibroacoustic diagnostics of the same transmission under conditions with a considerable impact of the conveyor chain. An additional cognitively significant research goal was the analysis of the dependence of the diagnostic utility of the signal depending on the sensor mounting point. Five different locations of three-axis sensors oriented to the next stages and various types of gears were determined, as well as places characterized by high spatial accessibility, which are often selected as places for measuring the vibration of gears. Using MATLAB software, a program was written that was calibrated and adapted to the specifics of the measuring equipment based on the collected test results. As a result, it was possible to obtain a multidimensional data interpretation of vibration signals of system condition monitoring of a three-stage gear transmission operating under difficult conditions. The results were based on signals registered on the real three-stage gear transmission operating under the impact of a scraper conveyor’s chain drive.

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10

Xia, Rui, Xuewen Wang, Bo Li, Xing Wei, and Zhaojian Yang. "Discrete Element Method- (DEM-) Based Study on the Wear Mechanism and Wear Regularity in Scraper Conveyor Chutes." Mathematical Problems in Engineering 2019 (January 3, 2019): 1–12. http://dx.doi.org/10.1155/2019/4191570.

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The scraper conveyor is the key conveying equipment for fully mechanized coal mining. Wear failure of the chute is the main form of failure of the scraper conveyor. In this study, the discrete element method (DEM) was combined with the wear model. The wear mechanism and wear regularity of the chute were explored by tracking the changes in the position of coal particles during the wear process. After the validation of wear simulation, a wear test of coal for different intrinsic parameters was designed. In one wear cycle, the three-body wear was about 32.84 times that of the two-body wear. In the research range, the wear of the scraper conveyor chute increased with the increase of Poisson’s ratio, shear modulus, and density of the coal. The shear modulus showed remarkable effect on the wear of the chute, followed by Poisson’s ratio and density. There existed a linear relationship between the shear modulus and wear (R2 = 0.8232). This study is expected to be used to predict the wear of the scraper conveyor chute and provide a theoretical basis for the applicability of the chute in different mines.

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11

Li, Qiang, Ming Yu Zhang, and Jun Mao. "Dynamic Analysis on the Starting Process of First Conveyor’s Scraper Chain." Applied Mechanics and Materials 851 (August 2016): 279–85. http://dx.doi.org/10.4028/www.scientific.net/amm.851.279.

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For the study of first conveyor chain dynamics behavior when it is started and seek the theory basis for the chain breakage on first conveyor, set up the mathematical model of the first conveyor and its scraper chain by using finite-element method. And then did the dynamics characteristic analysis between scraper chains with material, set up the differential equation. Took advantage of the mathematical model and the differential equation, and combined with the type of EBZ160 road header's technical parameters, did dynamic simulation. It draw a conclusion that during the start-up process the chain speed fluctuates a large range between, the maximum stress value on scraper chain is 1.15×104N appeared after 1s, chain tension adjustment time is about 10s, the biggest adjustment time is 12s.

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12

Wang, Xuewen, Bo Li, Shaowei Wang, Zhaojian Yang, and Liu Cai. "The transporting efficiency and mechanical behavior analysis of scraper conveyor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 18 (September 29, 2017): 3315–24. http://dx.doi.org/10.1177/0954406217734002.

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Scraper conveyor is the main equipment for underground coal transportation, and its high-efficiency and smooth operation is of great significance to safety production. This study simulated the process of transporting bulk coal by the scraper conveyor using the discrete element method. Transporting efficiency of scraper conveyor affected by the chain speed, static frictional coefficient, particle size, and laying angle was studied. Then the relationship between the chain speed, static frictional coefficient and the chute wear was explored. The stress and deformation characteristics of the chute during the transportation were studied by coupling the discrete element method and finite element method. Results showed that the mass flow rate changed significantly with the chain speed and static frictional coefficient, while it varied slightly with the change of particle size and laying angle; the higher chain speed and larger bulk coal led to more serious wear of the chute, and large stress mainly concentrated at the direct contact area and the area under the impact load from the bulk coal. Therefore, when designing the chute structure, it is necessary to ensure the wear resistance and strength of the contact area on the chute. The results could provide a theoretical basis for structural optimization of scraper conveyor.

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13

Zhuang, Min, Ge Li, Kexin Ding, and Guansheng Xu. "Optimized Design of Mechanical Chain Drive Based on a Wireless Sensor Network Data Algorithm." Journal of Sensors 2021 (September 13, 2021): 1–13. http://dx.doi.org/10.1155/2021/2901624.

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In this paper, we use a wireless sensor network data algorithm to optimize the design of mechanical chain drive by conducting an in-depth study of the mechanical chain drive optimization. We utilize the crowdsourcing feature of the swarm-wise sensing network for assisted wireless sensor networking to achieve crowdsourcing-assisted localization. We consider a framework for crowdsourcing-assisted GPS localization of wireless sensor networks and propose two recruitment participant optimization objectives, namely, minimum participants and time efficiency, respectively. A model and theoretical basis are provided for the subsequent trusted data-driven participant selection problem in swarm-wise sensing networks. The sprocket-chain engagement frequency has the greatest influence on the horizontal bending-vertical bending composite in different terrain conditions. The dynamic characteristics under working conditions are most influenced, while the scraping of the scraper and the central groove significantly influenced horizontal bending and vertical bending. Under load conditions, the amplitude of the scraper and central groove scraping increases significantly, which harm the dynamics of the scraper conveyor. By monitoring the speed difference between the head and tail sprockets and the overhang of the scraper, the tensioning status of the scraper conveyor chain can be effectively monitored to avoid chain jamming and chain breakage caused by the loose chain, thus improving the reliability and stability of the scraper conveyor.

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14

Loveykin, V., Yu Romasevich, and A. Grushko. "Mathematical modeling of a scraper conveyor movement." Актуальные направления научных исследований XXI века: теория и практика 3, no. 9 (December 22, 2015): 317–21. http://dx.doi.org/10.12737/16932.

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15

Xie, Jiacheng, Zhaojian Yang, Xuewen Wang, Shuping Wang, and Qing Zhang. "A Joint Positioning and Attitude Solving Method for Shearer and Scraper Conveyor under Complex Conditions." Mathematical Problems in Engineering 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/3793412.

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In a fully mechanized coal-mining face, the positioning and attitude of the shearer and scraper conveyor are inaccurate. To overcome this problem, a joint positioning and attitude solving method that considers the effect of an uneven floor is proposed. In addition, the real-time connection and coupling relationship between the two devices is analyzed. Two types of sensors, namely, the tilt sensor and strapdown inertial navigation system (SINS), are used to measure the shearer body pitch angle and the scraper conveyor shape, respectively. To improve the accuracy, two pieces of information are fused using the adaptive information fusion algorithm. It is observed that, using a marking strategy, the shearer body pitch angle can be reversely mapped to the real-time shape of the scraper conveyor. Then, a virtual-reality (VR) software that can visually simulate this entire operation process under different conditions is developed. Finally, experiments are conducted on a prototype experimental platform. The positioning error is found to be less than 0.38 times the middle trough length; moreover, no accumulated error is detected. This method can monitor the operation of the shearer and scraper conveyor in a highly dynamic and precise manner and provide strong technical support for safe and efficient operation of a fully mechanized coal-mining face.

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16

Li, Long, Hongwei Cui, Zisheng Lian, and Qiliang Wang. "Modeling and Optimization of Soft Start-Up for Hydroviscous Drive Applied to Scraper Conveyor." Mathematical Problems in Engineering 2019 (September 9, 2019): 1–13. http://dx.doi.org/10.1155/2019/6131364.

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To improve the soft start-up performance of a scraper conveyor under different working conditions, the mathematical model of the torque for controllable starting transmission was established. The influences of start-up time, load values, and moment of inertia on the soft start-up characteristics of a scraper conveyor are analyzed. Based on the analytic hierarchy process (AHP), the new evaluation system of soft start-up optimization for hydroviscous drive applied to a scraper conveyor is proposed. Through the joint simulation platform of MATLAB and Isight, the two-parameter control model for soft start-up time is established using the method of experimental design and simulated annealing algorithm. The optimal start-up time under different conditions is determined, and soft start-up is optimized. The results show that with increasing start-up time, the objective function value of soft start-up performance decreases first and then increases. Under different flywheel inertia and load conditions, there is an optimal start-up time that minimizes the objective function for better soft start-up performance. The optimal start-up time decreases with increasing load, and the optimal start-up time decreases monotonically with the input flywheel inertia. This research provides a new method and theoretical basis for the modeling and performance optimization of soft start-up for hydroviscous drive applied to a scraper conveyor.

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17

Li, Junxia, and Shaowei Liang. "Friction and wear of the middle trough in scraper conveyors." Industrial Lubrication and Tribology 70, no. 6 (August 13, 2018): 1072–77. http://dx.doi.org/10.1108/ilt-08-2017-0231.

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Purpose The study of the friction law and wear characteristics of the middle trough material can better select the appropriate material for the scraper conveyor of fully mechanized working face and provide theoretical support for the wear-resistant treatment technology. Design/methodology/approach This paper investigated friction and wear of the middle trough in a scraper conveyor under different media. Lignite, coking coal and anthracite were selected media, and middle trough wear was maximum for anthracite and minimum for lignite, with coking coal being intermediate. Findings Wear increased linearly with increasing load nonlinearly with increasing sliding speed. Middle trough wear also increased with increasing media granularity up to approximately 0.4 mm (40 mesh), but had little effect beyond that. Originality/value It can provide a reference for the scraper conveyor running resistance. At the same time, it has great social significance and economic benefits for the safe, green and efficient coal mine industrial adjustment, etc.

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18

Shi, Jian Guo, Jun Mao, and Xiao Hua Wei. "Research on Dynamic Tension Control Theory for Heavy Scraper Conveyor." Applied Mechanics and Materials 34-35 (October 2010): 1956–60. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1956.

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To control the tension dynamic behaviors of heavy scraper conveyor self-adjusting system used for the chain initial tension of the scraper conveyor was considered. Hydraulic control system according to the principle was designed and the control theory of the system was established. the new fuzzy- PID controller used to the self-adjusting system was designed to limit the minimum tension point to some given scope. the example of simulation proved that the increase of power loss due to the higher tension and the chain escaping from sprocket wheel due to the lower tension can be avoided.

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19

Shprekher, Dmitry, Gennady Babokin, Alexandr Zelenkov, and Dmitry Ovsyannikov. "Universal Computer Model for Studying the Dynamics of a Two-Motor Scraper Conveyor." Известия высших учебных заведений. Электромеханика 64, no. 2 (2021): 56–64. http://dx.doi.org/10.17213/0136-3360-2021-2-56-64.

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The article proposes to study the dynamics of the scraper conveyor (SC), which is one of the main components of the mechanized complex of the coal face, to use a universal computer model in which the multi-mass system of the traction body (TB) with concentrated parameters is replaced by a script in the form of a MATLAB function, the code for modeling the system of equations of the TB in which is developed using the Matlab pro-gramming language. With the help of Simulink blocks, models of electric motors, transmissions, drive sprockets, as well as the elementary masses of TB are created. This solution made it possible to change the number of elementary masses in a wide range, and to ensure the study of dynamic processes in the electromechanical system of the SC with a predetermined accuracy. The most common type of multi-motor conveyor is considered: two-drive, with head and end drives connected through transmissions and sprockets by an infinite chain with scrapers. The simulation of the direct start modes at full load and empty load was carried out. The results showed that the proposed model provided 2 times faster simulation of the developed model compared to the model of a conveyor made up of the same number of individual elementary masses, while the accuracy of the simulation in terms of the speed of movement of the chain is 5% in the interval with the real conveyor. It is concluded that it is necessary to develop an effective method of controlling the head and tail drives of the scraper conveyor in order to equal their load. The results of the simulation can be used to predict the fatigue life and determine the optimal pretensioning force at an early design stage, when only a few design parameters are known.

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20

Gulnara S., Zhetesova, Beisembaev Kakim M., Mendikenov Kanat K., and Teliman Irina V. "Modelling scraper conveyor operation in the turn zone." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII GORNYI ZHURNAL, no. 6 (June 26, 2019): 108–17. http://dx.doi.org/10.21440/0536-1028-2019-6-108-117.

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21

Hlushkova, D. B., L. L. Kostina, E. M. Voronova, S. V. Demchenko, and A. A. Chigrin. "SELECTION OF MATERIAL FOR RESPONSIBLE DETAILS SCRAPER CONVEYOR." Bulletin of Kharkov National Automobile and Highway University, no. 82 (December 23, 2018): 74. http://dx.doi.org/10.30977/bul.2219-5548.2018.82.0.74.

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22

Zhang, Q., R. X. Zhang, and Y. Tian. "Scraper Conveyor Structure Improvement and Performance Comparative Analysis." Strength of Materials 52, no. 4 (July 2020): 683–90. http://dx.doi.org/10.1007/s11223-020-00218-2.

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23

Zhao, Shuanfeng, Pengfei Wang, and Shijun Li. "Study on the Fault Diagnosis Method of Scraper Conveyor Gear under Time-Varying Load Condition." Applied Sciences 10, no. 15 (July 23, 2020): 5053. http://dx.doi.org/10.3390/app10155053.

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Vibration signal is often used in traditional gear fault diagnosis techniques. However, the working face of the scraper conveyor is narrow, harsh and easily explosive, so it is inconvenient to obtain vibration signals by installing sensors. Motor current signature analysis (MCSA) is a fault-diagnosis method without sensor installation, which is easier to realize in the mine. Therefore, a fault diagnosis method for local gear fault, which is based on bispectral analysis (BA) of analytical signal envelope obtained by processing a stator current under time-varying load condition, is proposed in our paper. In this method, the fault frequency component is enhanced by eliminating the interference of fundamental frequency and coal flow impact. Then, the enhanced fault frequency component is extracted by BA, and a quantitative analysis of the fault strength under time-varying load is carried out from the perspective of energy. Finally, the proposed method is verified on the number HB-kpl-75 scraper conveyor reducer, and the results show that this method can successfully diagnose the failure of the scraper conveyor gear under time-varying load conditions.

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24

Qie, Yan Hui, Bo Liu, Xiu Hong Wang, Hai Peng Jia, and Jian Peng Li. "Study on Topology Optimum Design of Baffle of Scraper Conveyer." Advanced Materials Research 228-229 (April 2011): 96–100. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.96.

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At present the study on the application of the topology optimum design in scraper conveyor is still under development. In this paper the topology optimization based on the homogenization method is applied to the design of the baffle on the scraper conveyer, which can provide a valuable conceptual design scheme for the selection of the baffle pattern. In conjunction with the homogenization theory and Finite Element Method (FEA), the mathematical models for designing the baffle by the minimizing mean compliance are developed in this paper. By applying the topology optimum design to the baffle, the topology optimization based on the homogenization method is proved to be reliable and practical at the conceptual design stage of baffle.

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25

Zhang, Yong Qiang, Xian Min Ma, Jian Xiang Yang, and Yan Ni Zhang. "Rough Set Fuzzy Neural Network Fault Diagnosis for the over Current Detection of Coal Mining Scraper." Applied Mechanics and Materials 321-324 (June 2013): 2146–51. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.2146.

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In this paper the rough set fuzzy neural network is used to monitor the over current fault problem of the mining scraper conveyor motor driving system. The phase current signals are input into the neural network, and then the current signals are processed with fuzzy logic set theory for optimization. Because too many rules may lead to complex computation, the rough set theory is used to reduce the rules after the signal characteristics are extracted. The simulation results show that the precision and reliability of motor driving system of the mining scraper conveyor can be improved by this method.

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26

Fedorko, Gabriel, Jan Nečas, Jiří Zegzulka, Daniel Gelnar, Vieroslav Molnár, and Marianna Tomašková. "Measurement of Amount for Steel Abrasive Material Transported by Special Scraper Conveyor." Applied Sciences 11, no. 4 (February 19, 2021): 1852. http://dx.doi.org/10.3390/app11041852.

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Results obtained from measuring the required amount of steel abrasive material with various fragmentations, which is transported by a special kind of scraper conveyor, offers information that is useful for operators of the abrasive blast cabinets. The presented article describes an innovative methodology developed for determination of the most relevant operational parameters relating to the above-mentioned situation. The most important parameters in this case are: the optimal amount of the abrasive material, the conveying speed of the scraper conveyor and the feeding of the conveyor with regard to partial or full elimination of instable operational area. Elimination of the instable operational area is possible by means of a simple constructional modification of the given conveying system according to the results obtained from experimental investigation, which was performed using special, originally developed laboratory testing equipment.

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ZHUKOV, Ivan, Nikolay GOLIKOV, and Nikita MARTYUSHEV. "Design rationalization of the scraper conveyor section by means of an automated method of strength characteristics analysis." Sustainable Development of Mountain Territories 14, no. 1 (March 30, 2022): 142–50. http://dx.doi.org/10.21177/1998-4502-2022-14-1-142-150.

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Purpose. The article is devoted to the approbation of a computational methodology for analyzing the strength characteristics of a section of a scraper conveyor, taking into account the external impact on the section from elements of a mine treatment complex used in coal mining. Elimination of structural defects of the section is carried out, as a rule, by simple means of increasing the size of its elements. The presence of a generalized technique for analyzing the strength of the conveyor section ensures a rational choice of materials and geometric elements of the section at the design stage. Methods.The developed method of analysis of the stress-strain state of the section of the scraper conveyor is based on the application of the method of finished elements, which is the basis of automated systems of engineering calculations. The created design model of the section makes it possible to determine the strength characteristics of the structure depending on the operating conditions and the external system of forces caused by the interaction of the section with other elements of the mining treatment complex. Results. Based on the results of the conducted research, a plan has been drawn up to optimize the design of the conveyor section, the implementation of which ensures an increase in structural strength and, consequently, an extension of the service life of the conveyor. The obtained results of computer calculations are quite correlated with production data on the assessment of the failure of conveyor sections as a result of the destruction of structural elements. Conclusions. The developed computer model of the section of the scraper conveyor, when implementing the proposed methodology for analyzing the strength characteristics of the structure, ensures the selection of rational geometrically and technological parameters of the section at the design stage.

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28

Liu, Cai Jun, Jie Ma, and Wu Jin Zhang. "Asynchronous Permanent Magnet Coupler Hydraulic Coupler and Performance Analysis." Applied Mechanics and Materials 427-429 (September 2013): 429–32. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.429.

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This paper analyzes the three major problems exist in the long-term use of hydraulic coupler, a temperature rise effect is the hidden trouble of the normal operation of equipment; two is the site difficult to accurately control the charging liquid, starting power balance and shutdown can not control the scraper conveyer; three is the property of medium effects factors of hydraulic coupling torque; introduces the working principle of asynchronous magnetic coupling and unique five technical characteristics. The asynchronous magnetic coupling and hydraulic coupler has obvious technical advantages compared, can solve the long-standing hydraulic coupler in the production practice expect to solve urgently and has failed to solve the problem. Conclusion is the soft starter for asynchronous magnetic coupling for scraper conveyor is completely feasible.

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29

Cenacewicz, Krzysztof, and Andrzej Katunin. "Modeling and simulation of longwall scraper conveyor considering operational faults." Studia Geotechnica et Mechanica 38, no. 2 (June 1, 2016): 15–27. http://dx.doi.org/10.1515/sgem-2016-0015.

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AbstractThe paper provides a description of analytical model of a longwall scraper conveyor, including its electrical, mechanical, measurement and control actuating systems, as well as presentation of its implementation in the form of computer simulator in the Matlab®/Simulink®environment. Using this simulator eight scenarios typical of usual operational conditions of an underground scraper conveyor can be generated. Moreover, the simulator provides a possibility of modeling various operational faults and taking into consideration a measurement noise generated by transducers. The analysis of various combinations of scenarios of operation and faults with description is presented. The simulator developed may find potential application in benchmarking of diagnostic systems, testing of algorithms of operational control or can be used for supporting the modeling of real processes occurring in similar systems.

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30

Gridnev, Pawel I., Tamayana T. Gridneva, Julia Y. Spotaru, and Wacław Romaniuk. "Evaluation of Effective Manure Disposal Systems and its Influence on Soil Fertility." Agricultural Engineering 20, no. 4 (December 1, 2016): 59–68. http://dx.doi.org/10.1515/agriceng-2016-0064.

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Abstract The paper presents main provisions of methodology of manure utilization systems evaluation. All costs, starting with the costs related to manure cleaning in premises to the costs of increasing the biological yield obtained from its use, including the soil fertility value changes, were considered. The target function is offered a minimum of complex costs of entering the required amount of nutrients and organic matter per unit area for the planned yield. The effective technical solutions of calculations based on the proposed method include: construction of a boom conveyor with a hydraulic drive and described performance, scraper and screw types of conveyors, automatic scraper loading installation of manure from livestock buildings. The proposed solutions will reduce losses of nutrients by 50-70%, and will allow production of 20 million tons of grain annually.

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31

Liu, Ting, Chao Tan, Zhongbin Wang, Jing Xu, Yiqiao Man, and Tuo Wang. "Horizontal Bending Angle Optimization Method for Scraper Conveyor Based on Improved Bat Algorithm." Algorithms 12, no. 4 (April 22, 2019): 84. http://dx.doi.org/10.3390/a12040084.

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The horizontal bending angle of scraper conveyor has a great influence on the running resistance, the current consumption, coal winning efficiency of the working surface, etc. Approximately 1–3° is usually the range of horizontal bending angle, but does not indicate the optimum bending angle of the coal mining face. To find the optimal horizontal bending angle, an optimization method is proposed. A mathematical calculation model of the running resistance of the scraper is established based on the direction of the shearer operation. Then, a method of adjusting the step size of the search by inertia weight and expanding fly distance range obeying the t-distribution is proposed based on the basic bat algorithm (BA). Finally, an industrial application was conducted in 21220 Changcun fully mechanized coal mining face, Henan Province. The results show that the current consumption by the scraper conveyor was reduced by 31% when the horizontal bending angle of the S-bending area was 0.66°. Meanwhile, the theoretical current has good consistency with the experimental data, and the average absolute error was 3%.

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32

Bespal'kov, A. A., O. A. Lukashuk, and G. G. Kozhushko. "The upgrading of the tubular scraper conveyor junction points." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 2 (January 1, 2017): 12–14. http://dx.doi.org/10.17073/1683-4518-2017-2-12-14.

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33

Świder, Jerzy, Krzysztof Herbuś, and Kamil Szewerda. "Dynamic analysis of scraper conveyor operation with external loads." MATEC Web of Conferences 94 (2017): 01009. http://dx.doi.org/10.1051/matecconf/20179401009.

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34

侯, 文博. "Mechanical Characteristics of Sprocket Chain Ring of Scraper Conveyor." Mine Engineering 07, no. 03 (2019): 216–24. http://dx.doi.org/10.12677/me.2019.73031.

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35

Jiang, Shoubo, Weijian Ren, Qinghua Mao, Qingliang Zeng, Pengfei Yu, Kuidong Gao, and Liang Wang. "Dynamic Analysis of the Scraper Conveyor under Abnormal Operating Conditions Based on the Vibration and Speed Characteristics." Shock and Vibration 2021 (February 6, 2021): 1–17. http://dx.doi.org/10.1155/2021/8887744.

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The scraper conveyor is the key coal transportation equipment on the coal mining face. The conveyor often encounters the influence of abnormal working conditions, such as stuck chains, broken chains, and impact loads, which have a great effect on the smooth operation of the scraper chain and seriously affect the safety of coal production. If the chain breaks during the test, the broken link may fly out and hurt the tester. The test risk of the scraper conveyor under abnormal working conditions is relatively large; hence, the test research is impossible to carry out. The combination of experiment and simulation is used to carry out the research. The dynamic characteristic test bed of the chain drive system is created to collect the speed of the sprocket and the acceleration of the scraper. The two groups of data are obtained by simulation, and the accuracy of the simulation is verified by comparing the test data with the simulation data. The dynamic characteristics of the chain drive system under abnormal working conditions are analyzed by simulation. Results show that the longitudinal velocity of the link dramatically changes, the contact force increases by 5.4 times, and the link vibrates under impact loads. When the chain is stuck, the speed of the running direction suddenly changes, and the chainring vibrates. The contact force between the chainrings increases by 7.2 times compared with the smooth operation. When the chain is broken, the acceleration in the running direction of the link dramatically changes. This study provides a basis and reference for the further optimization design of the chain drive system and detection of the abnormal working conditions.

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36

Wang, Shu Ping, and Zhao Jian Yang. "Improve Design and Analysis on Transitional Chute of Scraper Conveyor." Advanced Materials Research 145 (October 2010): 541–45. http://dx.doi.org/10.4028/www.scientific.net/amr.145.541.

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To avoid the corrosion of transitional chute of scraper conveyor, optimization is needed on the structural of transitional chutes. After analyzing the force on turning point of transitional chute, multi-body dynamic experiments were made. The results show that, the improve design decrease the force on the turning point obviously and there are no extra difficulty on manufacture and installation. The experiment and analysis can conclude that the forces, which influence the wear of transitional chute, are depended on the transition arc radius but not transitional angle.

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37

Zhai Jianhua, 翟建华, 王乾宝 Wang Qianbao, 魏晓华 Wei Xiaohua, 李艺凡 Li Yifan, 张菀麟 Zhang Wanlin, 沈成 Shen Cheng, 刘志杰 Liu Zhijie, and 宋晓龙 Song Xiaolong. "Repair of Scraper Conveyor Sprocket Based on Metal 3D Printing." Chinese Journal of Lasers 44, no. 4 (2017): 0402007. http://dx.doi.org/10.3788/cjl201744.0402007.

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38

Акімов, Олег Вікторович, and Віктор Тимофійович Акімов. "Some microgeometry and wear of the scraper and pans conveyor." Technology audit and production reserves 6, no. 1(8) (December 11, 2012): 3–6. http://dx.doi.org/10.15587/2312-8372.2012.5454.

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39

Ren, Zhong Quan, Jian Long Zhang, and Xin Liang. "FEA on Ramp Plate of Scraper Conveyor Based on ABAQUS." Advanced Materials Research 1014 (July 2014): 71–75. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.71.

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This article applies the Pro/E software to build the solid model of the ramp plate,and then import it into the ABAQUS which is one of finite element analysis software.By the analysis and calculation of the ramp plate which is the key components of the scraper conveyor.The problems that may exist in the key components to the actual use are solved,and the rationality of the key components structure is improved to make sure the reliability and service life of the ramp plate.

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40

Liu, Xiaohong, and Lubin Wei. "Vibration characteristics research of the polygonal effect of scraper conveyor." IOP Conference Series: Materials Science and Engineering 612 (October 19, 2019): 032044. http://dx.doi.org/10.1088/1757-899x/612/3/032044.

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41

Bespal’kov, A. A., O. A. Lukashuk, and G. G. Kozhushko. "Modernization of the Units of a Tubular Scraper Flight Conveyor." Refractories and Industrial Ceramics 58, no. 1 (May 2017): 16–18. http://dx.doi.org/10.1007/s11148-017-0046-7.

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42

Siregar, Rolan. "Perkiraan Kekuatan Struktur Mekanik Side Scraper dengan Metode Elemen Hingga Beserta Rekomendasi Material Pengganti Elemen Kritis." ROTASI 21, no. 4 (October 23, 2019): 251. http://dx.doi.org/10.14710/rotasi.21.4.251-257.

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Salah satu jenis alat pengeruk tumpukan material ke belt conveyor dalam suatu industri pertambangan adalah side scraper. Beberapa elemen penyusun alat berat tersebut memiliki life time yang relatif singkat (elemen kritis) karena keterbatasan kekuatan struktur pendukung dalam menahan beban statis maupun kinetis. Adapun elemen yang mengalami kegagalan material adalah lengan brace, pylon, dan lengan scraper. Oleh karena itu dalam penelitian ini dilakukan perhitungan kekuatan struktur mekanik side scraper dan rekomendasi material pengganti elemen yang retak. Adapun metode penelitian ini dilakukan dengan simulasi tegangan berbasis metode elemen hingga. Dalam analisis statik diperoleh rekomendasi material berdasarkan perhitungan tegangan pada struktur mekanik tersebut. Adapun material yang digunakan terdiri dari dua jenis yaitu AISI Steel 1040, AISI Steel 1340. Penggunaan jenis material yang tidak seragam dimaksudkan untuk mengoptimalkan harga ekonomis material penyusun struktur mekanik tersebut. Akhir dalam penelitian ini diharapkan dapat berguna untuk maintenance peralatan side scraper.

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43

Xia, Rui, Bo Li, Xuewen Wang, Zhaojian Yang, and Liping Liu. "Screening the Main Factors Affecting the Wear of the Scraper Conveyor Chute Using the Plackett–Burman Method." Mathematical Problems in Engineering 2019 (April 11, 2019): 1–11. http://dx.doi.org/10.1155/2019/1204091.

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The wear of scraper conveyor chute causes both significant economic and environmental losses by shortening the service life. The life of the chute under coal abrasive wear situations is primarily decided by operating conditions and the materials properties. The comprehensive analysis of the influence factors had not been studied before. In this paper, the Plackett-Burman design (PBD) method was used to screen the main influence factors and a regression equation was developed to predict the wear loss. The steel was tested on a modified pin-on-disk apparatus in which coal abrasive was filled in the disk. The influence factors included water content, gangue content, coal particle size, Hardgrove Grindability-Index (HGI) of the coal, normal load, and scraper chain speed. The results of the investigation suggested that the significance of water content, normal load, and gangue content on wear loss was relatively higher than the HGI of coal, scraper chain speed, and coal particle size. The wear loss increased with the increase of water content, gangue content, normal load, and coal particle size while it decreased as increase in HGI of the coal and scraper chain speed. Based on the significance of the parameters, the regression equations were derived and verified further with a number of test cases. Optical microscope studies revealed the main wear mechanism of the chute was mainly micro-cutting and corrosive wear and accompanied by fatigue fracture.

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44

Zhai Jianhua, 翟建华, 张菀麟 Zhang Wanlin, 许慧印 Xu Huiyin, 刘志杰 Liu Zhijie, and 杨东山 Yang Dongshan. "Study on Laser Cladding Repair of Flat Chain of Scraper Conveyor." Laser & Optoelectronics Progress 55, no. 4 (2018): 041402. http://dx.doi.org/10.3788/lop55.041402.

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45

赵, 世煜. "Reform Practice of Short-Distance Scraper Conveyor Applied to Raw Coal." Mine Engineering 07, no. 02 (2019): 166–70. http://dx.doi.org/10.12677/me.2019.72023.

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46

Wieczorek, Andrzej N., and Mateusz Wójcicki. "Synergism of the Binary Wear Process of Machinery Elements Used for Gaining Energy Raw Materials." Energies 14, no. 7 (April 2, 2021): 1981. http://dx.doi.org/10.3390/en14071981.

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During an in-situ operation of machines, used for the exploitation of energy raw materials, a damaging impact of the environment on the components of these machines is experienced. The action of degrading factors is mostly shown in the form of a clear synergistic effect. In particular, this effect can be seen during an exploitation of driving elements of scraper conveyors, used as one of the basic machines in the hard coal mining process. In the article, the subject–matter, connected with an operation of sprockets in scraper conveyors, is presented. Special attention is paid to a mutual reaction of the mineral abrasive and the presence of mine water. The main objective of the research work was a determination of the interactive component of the factor causing an abrasive wear–quartz abrasive connected with the associated action and the factor intensifying electrochemical corrosion–water with and without the NaCl salt content. Experimental tests were conducted in the conditions similar to the reality, with the use of a test rig in the form of a short scraper conveyor. Within the framework of the test abrasive wear rates for the case of the abrasive presence itself and a mixture of the abrasive, salt and water were determined. Based on the obtained results, it appears that there is a synergistic impact of abrasive–corrosive mixtures on the wear of the surface layer of the chain sprockets under testing, and also, the causes of the interactive component values in the function of hardness and maximum strength of the materials under investigation are presented.

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47

Szurgacz, Dawid. "The effectiveness of the use of a powered roof support in the light of research and analysis." E3S Web of Conferences 278 (2021): 01007. http://dx.doi.org/10.1051/e3sconf/202127801007.

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A powered roof support is an element of a longwall complex. It is connected with a scraper conveyor by a sliding system. The conveyor carries a shearer mining the coal. The second function of the powered roof support is to protect the excavation against uncontrolled impact of the rock mass. This paper focuses on the analysis of the effectiveness of the powered roof support. The main objective is to determine the factors influencing failure-free operation in the exploitation process. Moreover, the author discusses performance requirements for the powered roof support.

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48

Lyashuk, Oleg, Andriy Dyachun, Roman Zolotuy, Olexandr Oleksyshyn, Yroslav Zamora, and Zdenko Tkáč. "Results of Experimental Research of Granular Materials Transportation by Tubular Scraper Conveyors." Acta Technologica Agriculturae 16, no. 4 (December 1, 2013): 103–7. http://dx.doi.org/10.2478/ata-2013-0026.

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Abstract A full factor experiment (FFE33) of transporting bulk materials by a tubular scraper conveyor on a curved track was conducted. There were derived the regression equation dependencies of production and torque on pipe diameter, fill factor and linear velocity. The graphical dependence of production and torque on the above-mentioned factors was constructed, and regression coefficients for different materials were determined.

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49

Dolipski, Marian, Eryk Remiorz, and Piotr Sobota. "DYNAMICS OF NON-UNIFORMITY LOADS OF AFC DRIVES." Archives of Mining Sciences 59, no. 1 (March 1, 2014): 155–68. http://dx.doi.org/10.2478/amsc-2014-0011.

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Abstract The length of armoured face conveyors currently used in hard coal mines most often ranges between 200 m and 300 m. The machines are equipped with a main and auxiliary drive. Asynchronous motors mounted in conveyor drives feature the capacity of several hundreds of kilowatts. The non-uniform distribution of loads onto individual drives is observed in practice. The numerical value of loads distribution onto the individual armoured face conveyor drives is represented by a drive load distribution factor. It is defined as a ratio between the load of an electric motor installed in a given drive and the total conveyor load. The article presents a physical armoured face conveyor model intended for examining dynamic phenomena influencing the load non-uniformity of drives. Motion in this physical model is described with the system of (4 · j + 5) non-linear ordinary differential quotations of the second order. A mathematical model is obtained by adding functions describing the interwork of sprocket drums with chains and functions approximating the mechanical characteristics of asynchronous motors powered by means of frequency inverters. A large number of computer simulations was performed using this model enabling to study the impact on the load non-uniformity of drives of such parameters as motor slip, motor supply voltage drop, variations in supply voltage frequency, differences in the gear ratio of transmissions and differentiation in the pitch of scraper chain links along the chain contour.

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50

Babokin, Gennady, and Valeria Shalloeva. "Energy savings in scraper conveyor transport by a mechanized coal treatment machine." Energy Safety and Energy Economy 3 (June 2020): 39–43. http://dx.doi.org/10.18635/2071-2219-2020-3-39-43.

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