基于AMESim的带式输送机软启动方法研究

发布时间：2018-07-13 21:00

【摘要】：带式输送机作为当今世界最重要的散状物料运输装置,其地位变得越来越突显,由于它具有经济性好、性能稳定、运输能力强并可实现连续运输等特点,已经被广泛的应用到各个领域,特别是在矿产行业,已经成为了最主要的运输工具,而在带式输送机不断的朝着大运载、远距离以及高带速的方向发展,输送机的启动问题就显得尤为突出,由于输送带具有较为特别的粘弹特性,距离越长所表现出来的粘弹特性就越明显,这时就必须采用辅助装置来启动带式输送机。本文提出一种软启动方式,即利用自动变速器来作为软启动装置,利用液力变矩器的变矩性能,以及液力的柔性传动和对载荷冲击的适应性,再配合上变速箱挡位的变化,控制速度变化,减少启动加速度以及加速度的突变来缓解启动时对输送带的冲击,实现软启动。为建立该软启动方式的仿真模型,本文首先研究了输送带的固有特性(动、静特性),选用合适的数学模型,并在AMESim中建立了其模型,利用信号模拟了四种启动加速度曲线,验证了模型对这几种标准的加速度曲线的响应;其次,研究了液力变矩器的性能并结合特性曲线了解其对载荷的自动适应性,行星变速器的挡位变换及不同挡位的传动比,以及湿式离合器和制动器的结构与性能,并在AMESim中建立了变速器的模型,检验了其变速性能;最后调整相应参数建立液力自动变速器驱动带式输送机的软启动装置模型,按照六种启动情况进行分析,结合输送带的张力、速度、加速度等数据,选择合适的启动方式。仿真的情况分析初步证明了本文提出的以自动变速器作为带式输送机软启动设备的可行性。
[Abstract]:As the most important transport device of bulk materials in the world today, belt conveyor has become more and more prominent because it has the characteristics of good economy, stable performance, strong transportation capacity and the ability to realize continuous transportation, etc. Has been widely used in various fields, especially in the mineral industry, has become the most important means of transport, and in the belt conveyor is constantly moving towards the direction of large transportation, long distance and high speed. Because the conveyor belt has special viscoelastic characteristic, the longer the distance is, the more obvious the viscoelastic characteristic is, and the auxiliary device must be used to start the belt conveyor. In this paper, a kind of soft starting method is proposed, that is, the automatic transmission is used as the soft starting device, the torque conversion performance of the hydraulic torque converter, the adaptability of the hydraulic flexible transmission and the load impact, and then the change of the gear position of the upper gearbox. Control the change of speed, reduce the acceleration and the sudden change of acceleration to alleviate the impact on conveyor belt and realize soft start. In order to establish the simulation model of the soft start mode, this paper first studies the inherent characteristics (dynamic and static characteristics) of the conveyor belt, selects the appropriate mathematical model, establishes its model in AMESim, and simulates four starting acceleration curves by using the signal. The response of the model to these standard acceleration curves is verified. Secondly, the performance of hydraulic torque converter is studied and its automatic adaptability to load, gear shift of planetary transmission and transmission ratio of different gears are studied. The structure and performance of wet clutch and brake are also discussed. The model of transmission is established in AMESim to test its speed change performance. Finally, the model of soft starting device of belt conveyor driven by hydraulic automatic transmission is established by adjusting the corresponding parameters. According to the six starting conditions, combined with the conveyor belt tension, speed, acceleration and other data, select the appropriate starting mode. The simulation results show the feasibility of using automatic transmission as the soft starting equipment of belt conveyor.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH222

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