The article Provides a dynamic model for belt conveyor. Based on the drive-force of conveyor, take-up tension of take-up assembly, gravity of conveyor belt and material, and friction between belt and idlers, it gives ...The article Provides a dynamic model for belt conveyor. Based on the drive-force of conveyor, take-up tension of take-up assembly, gravity of conveyor belt and material, and friction between belt and idlers, it gives a viscoelastic dynamic equation for conveyor belt. It presents a calculation method of analytic solution to both viscoelastic dynamic equation and geometric dynamic equation when automatic take-up assembly is applied to belt conveyor. The article also makes a study of design method of limiting and eliminating the conveyor belt's elastic vibration.展开更多
This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel pellets.For this,a belt conveyor with a length of 3.1 m was used and operated at varying c...This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel pellets.For this,a belt conveyor with a length of 3.1 m was used and operated at varying conditions:speeds,percentages of material loading on the belt,two combinations of the inclination angle of the belt and the falling height,and a different number of handling steps.We considered a design of experiments approach based on response surface methodology to investigate the effect of different conditions on the potential of fines generation.Moreover,a comparison between the results of the belt conveyor and three common benchmark experimental approaches(tumbling box,rotary impact tester,and mechanical compression test)was made.Results show that the number of handling steps and the combined effect of drop height and inclination angle directly affected the fines generation.However,the tested belt speed range and the level of loading were of lower significance.A polynomial quadratic model was derived based on the regression analysis and showed a high accuracy to predict the proportion of fines.Moreover,the tumbling box method showed good potential to predict the proportion of fines in a belt conveyor when transported several times.展开更多
皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生...皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。展开更多
文摘The article Provides a dynamic model for belt conveyor. Based on the drive-force of conveyor, take-up tension of take-up assembly, gravity of conveyor belt and material, and friction between belt and idlers, it gives a viscoelastic dynamic equation for conveyor belt. It presents a calculation method of analytic solution to both viscoelastic dynamic equation and geometric dynamic equation when automatic take-up assembly is applied to belt conveyor. The article also makes a study of design method of limiting and eliminating the conveyor belt's elastic vibration.
基金The support of the staff at the Wolfson Centre for Bulk Solids Handling Technology of the University of Greenwich to execute the experiments with the rotary impact tester is highly appreciated.We thank Ed Stok,Freek Brakel,Andre van den Bosch,Shreyas Sridhar,and Otto Cramwinckel for their help with the experiments at the Delft University of TechnologyThis work was financially supported by the Top Consortium for Knowledge and Innovation for the Biobased Economy(TKI-BBE),under grant number BBE-1713(Biomassa pellets:degradatie tjdens transport en handling).
文摘This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel pellets.For this,a belt conveyor with a length of 3.1 m was used and operated at varying conditions:speeds,percentages of material loading on the belt,two combinations of the inclination angle of the belt and the falling height,and a different number of handling steps.We considered a design of experiments approach based on response surface methodology to investigate the effect of different conditions on the potential of fines generation.Moreover,a comparison between the results of the belt conveyor and three common benchmark experimental approaches(tumbling box,rotary impact tester,and mechanical compression test)was made.Results show that the number of handling steps and the combined effect of drop height and inclination angle directly affected the fines generation.However,the tested belt speed range and the level of loading were of lower significance.A polynomial quadratic model was derived based on the regression analysis and showed a high accuracy to predict the proportion of fines.Moreover,the tumbling box method showed good potential to predict the proportion of fines in a belt conveyor when transported several times.
文摘皮带运输机在煤矿生产中一直承担着煤炭运输的重要任务,其安全稳定运行是保障煤矿安全生产的前提。但是,皮带运输机在实际使用过程中会发生各种各样的故障,严重时会造成皮带断裂进而导致设备停转,给煤矿生产带来很大损失。因此,对发生断带事故的原因进行分析,探讨断带保护技术应用及安防装置设计。根据分析结论和实际情况,设计了皮带运输机断带安防装置,提出了一种基于ARM的PLC+DCS+GSM (Programmable Logic Controller+Distributed Control System+Global System for Mobile Communications,可编程逻辑控制器+分散控制系统+全球移动通信系统)综合安防系统设计方案,并对该系统进行了可行性分析。
