The movement of the floating connecting mechanism between a hydraulic support and scraper conveyor is space movement;thus,when the hydraulic support pushes the scraper conveyor,there is an error between the actual dis...The movement of the floating connecting mechanism between a hydraulic support and scraper conveyor is space movement;thus,when the hydraulic support pushes the scraper conveyor,there is an error between the actual distance of the scraper conveyor and the theoretical moving distance.As a result,the scraper conveyor cannot obtain the straightness requirement.Therefore,the movement law of the floating connecting mechanism between the hydraulic support and scraper conveyor is analyzed and programmed into the Unity3D to realize accurate pushing of the scraper conveyor via hydraulic support.The Coal Seam?Equipment Joint Virtual Straightening System is established,and a straightening method based on the motion law of a floating connection is proposed as the default method of the system.In addition,a straightening simulation of the scraper conveyor was performed on a complex coal seam floor,the results demonstrate that the average straightening error of the scraper conveyor is within 2-8 mm,and is in direct proportion to the fluctuation of the coal seam floor in the strike of the seam with high accuracy,the straightness of scraper conveyor is more affected by the subsidence terrain during straightening than by the bulge terrain.And some conclusions are verified by experiment.Based on the verification of the relevant conclusions,a comparison and analysis of Longwall Automation Steering Committee(LASC)straightening technology and default straightening method in the simulation system shows that the straightness accuracy of LASC straightening technology under complex floor conditions is slightly less than that of the default straightening method in the proposed system.展开更多
In order to comprehensively improve the fault prevention and control technology of the scraper conveyor, this paper discusses the design of the fault monitoring system of the scraper conveyor, puts forward the fault i...In order to comprehensively improve the fault prevention and control technology of the scraper conveyor, this paper discusses the design of the fault monitoring system of the scraper conveyor, puts forward the fault improvement measures of the scraper conveyor, and puts forward the active and passive fault prevention and control technology combined with the monitoring system and daily maintenance management. The research results can guide the practical application of mine technical workers in engineering.展开更多
In order to strengthen the production efficiency and quality of underground coal mine, the application of variable frequency drive control system of scraper conveyor is analyzed. Firstly, the performance of the equipm...In order to strengthen the production efficiency and quality of underground coal mine, the application of variable frequency drive control system of scraper conveyor is analyzed. Firstly, the performance of the equipment is introduced, and the necessity of the design and application of frequency conversion drive control system is clarified, which is beneficial to strengthen the informatization and digitization of underground coal mine production. Secondly, it describes the construction of variable frequency drive control system, grasps the system structure and the selection requirements of various components. Finally analyzes the application of variable frequency drive control system, and summarizes the suggestions on optimizing the application effect of scraper conveyor, which is conducive to improving the stability and efficiency of the equipment operation, and provides modern system support for future underground coal mine production.展开更多
矿用刮板输送机刮板链的拆装存在能耗高、精度低和运行不稳定等问题,为此提出了一种融合运动学建模与多目标优化的智能化拆装系统设计方法。构建了涵盖升降、横移与旋转等动作的三自由度执行器空间模型,并引入融合了精英保留机制的第三...矿用刮板输送机刮板链的拆装存在能耗高、精度低和运行不稳定等问题,为此提出了一种融合运动学建模与多目标优化的智能化拆装系统设计方法。构建了涵盖升降、横移与旋转等动作的三自由度执行器空间模型,并引入融合了精英保留机制的第三代非支配排序遗传算法提升求解效率。为验证模型的有效性,基于两个真实的开源数据集进行了对比测试。结果表明,所提方法在任务执行效率、稳定性与能耗控制方面表现优越,任务周期控制在3.3 s以内,能耗低于16.5 kJ,振动强度保持在0.384 m/s 2以下,具有良好的工程适应性与推广价值。展开更多
A scraper conveyor is a kind of heavy machinery which can continuously transport goods and widely used in mines, ports and store enterprises. Since scraper failure rate directly affects production costs and production...A scraper conveyor is a kind of heavy machinery which can continuously transport goods and widely used in mines, ports and store enterprises. Since scraper failure rate directly affects production costs and production capacity, the evaluation and the prediction of scraper conveyor reliability are important for these enterprises. In this paper, the reliabilities of different parts are classified and discussed according to their structural characteristics and different failure factors. Based on the component＇s time-to-failure density function, the reliability model of scraper chain is constructed to track the age distribution of part population and the reliability change of the scraper chain. Based on the stress-strength interference model, considering the decrease of strength due to fatigue failure, the dynamic reliability model of such component as gear, axis is developed to observe the change of the part reliability with the service time of scraper. Finally, system reliability model of the scraper is established for the maintenance to simulate and calculate the scraper reliability.展开更多
基金This research was supported by the Project funded by National Natural Science Foundation of China(Grant No.52004174)China Postdoctoral Science Foundation(No.2019M651081)+2 种基金the Key Research and Development Program of Shanxi(201903D121141)the Natural Science Foundation of Shanxi Province(201901D211022)the Scientific and Technological Innovation Programs of Higher Education Institutions in Shan Xi(No.2019L0305).
文摘The movement of the floating connecting mechanism between a hydraulic support and scraper conveyor is space movement;thus,when the hydraulic support pushes the scraper conveyor,there is an error between the actual distance of the scraper conveyor and the theoretical moving distance.As a result,the scraper conveyor cannot obtain the straightness requirement.Therefore,the movement law of the floating connecting mechanism between the hydraulic support and scraper conveyor is analyzed and programmed into the Unity3D to realize accurate pushing of the scraper conveyor via hydraulic support.The Coal Seam?Equipment Joint Virtual Straightening System is established,and a straightening method based on the motion law of a floating connection is proposed as the default method of the system.In addition,a straightening simulation of the scraper conveyor was performed on a complex coal seam floor,the results demonstrate that the average straightening error of the scraper conveyor is within 2-8 mm,and is in direct proportion to the fluctuation of the coal seam floor in the strike of the seam with high accuracy,the straightness of scraper conveyor is more affected by the subsidence terrain during straightening than by the bulge terrain.And some conclusions are verified by experiment.Based on the verification of the relevant conclusions,a comparison and analysis of Longwall Automation Steering Committee(LASC)straightening technology and default straightening method in the simulation system shows that the straightness accuracy of LASC straightening technology under complex floor conditions is slightly less than that of the default straightening method in the proposed system.
文摘In order to comprehensively improve the fault prevention and control technology of the scraper conveyor, this paper discusses the design of the fault monitoring system of the scraper conveyor, puts forward the fault improvement measures of the scraper conveyor, and puts forward the active and passive fault prevention and control technology combined with the monitoring system and daily maintenance management. The research results can guide the practical application of mine technical workers in engineering.
文摘In order to strengthen the production efficiency and quality of underground coal mine, the application of variable frequency drive control system of scraper conveyor is analyzed. Firstly, the performance of the equipment is introduced, and the necessity of the design and application of frequency conversion drive control system is clarified, which is beneficial to strengthen the informatization and digitization of underground coal mine production. Secondly, it describes the construction of variable frequency drive control system, grasps the system structure and the selection requirements of various components. Finally analyzes the application of variable frequency drive control system, and summarizes the suggestions on optimizing the application effect of scraper conveyor, which is conducive to improving the stability and efficiency of the equipment operation, and provides modern system support for future underground coal mine production.
文摘矿用刮板输送机刮板链的拆装存在能耗高、精度低和运行不稳定等问题,为此提出了一种融合运动学建模与多目标优化的智能化拆装系统设计方法。构建了涵盖升降、横移与旋转等动作的三自由度执行器空间模型,并引入融合了精英保留机制的第三代非支配排序遗传算法提升求解效率。为验证模型的有效性,基于两个真实的开源数据集进行了对比测试。结果表明,所提方法在任务执行效率、稳定性与能耗控制方面表现优越,任务周期控制在3.3 s以内,能耗低于16.5 kJ,振动强度保持在0.384 m/s 2以下,具有良好的工程适应性与推广价值。
基金supported by National Natural Science Foundationof China under Grant No. 50875082Plan Project of Hunan Provincial Science and Technology under Grant No.2009FJ3160
文摘A scraper conveyor is a kind of heavy machinery which can continuously transport goods and widely used in mines, ports and store enterprises. Since scraper failure rate directly affects production costs and production capacity, the evaluation and the prediction of scraper conveyor reliability are important for these enterprises. In this paper, the reliabilities of different parts are classified and discussed according to their structural characteristics and different failure factors. Based on the component＇s time-to-failure density function, the reliability model of scraper chain is constructed to track the age distribution of part population and the reliability change of the scraper chain. Based on the stress-strength interference model, considering the decrease of strength due to fatigue failure, the dynamic reliability model of such component as gear, axis is developed to observe the change of the part reliability with the service time of scraper. Finally, system reliability model of the scraper is established for the maintenance to simulate and calculate the scraper reliability.
