带式输送机反馈增压驱动装置的研究

发布时间：2018-06-05 10:34

本文选题：摩擦牵引力 + 增压带　；参考：《太原理工大学》2017年硕士论文

【摘要】：带式输送机是依靠输送带的张力和输送带与驱动滚筒之间的摩擦来产生牵引力的。一旦摩擦牵引力不能满足带式输送机正常运行的需求,输送带与驱动滚筒之间就会发生打滑而不能正常运行,甚至会引发生产事故。为保证带式输送机的正常工作运行,输送带就必须具备足够大的张紧力,因而不得不选用较高强度的输送带,增加了设备的投资和运行的成本。本文研究通过在带式输送机上设置反馈增压驱动装置的方式来提高带式输送机的摩擦驱动性能。使用该装置后,带式输送机能够以较小的输送带初张力获得较大的摩擦牵引力,并且极限摩擦牵引力的值能够响应负载的变化,降低了输送带发生打滑的风险。本文的主要工作如下:1、深入分析了带式输送机的摩擦驱动原理。设计增压摩擦驱动装置使增压带能够作用在驱动滚筒处的输送带弧段上。在考虑增压带张力的前提下,推导出了增压摩擦驱动的欧拉公式及摩擦牵引力计算公式。2、设计反馈装置,通过反馈装置使增压带的张力能够反馈输送带张力的变化。对反馈装置进行受力分析,确定了反馈系数与回转中心位置的关系。并分析了影响反馈装置的强度、刚度、偏转角以及动态响应的因素。3、应用控制理论对反馈增压驱动的原理进行了分析。对反馈增压驱动的输送带不打滑条件进行了分析。对不同反馈系数取值下反馈增压驱动装置对带式输送机各项驱动性能指标带来的变化进行了分析,并计算了其在实际应用中带来的效益。4、利用RecurDyn建立带式输送机和反馈增压驱动装置的仿真模型。通过仿真得到在设置反馈增压驱动装置前后,以及在不同反馈系数取值下,输送带速度和张力的变化情况,并对仿真结果进行了分析。仿真结果表明:反馈增压驱动装置能够提高带式输送机的摩擦驱动性能,并且反馈系数的越大带式输送机的摩擦驱动性能就越好。RecurDyn仿真结果很好地符合公式计算结果。本文的为提高带式输送机摩擦牵引力的研究及反馈增压驱动装置的设计提供了一定的理论依据。
[Abstract]:Belt conveyors rely on the tension of the conveyor belt and the friction between the belt and the driving drum to produce traction. Once the friction traction can not meet the requirements of the belt conveyor running normally, the conveyor belt and the driving drum will slip and can not operate normally, and even lead to production accidents. In order to ensure the normal operation of the belt conveyor, the belt must have enough tension, so it has to choose a higher strength conveyor belt, which increases the investment and operation cost of the equipment. In this paper, the friction driving performance of belt conveyor is improved by setting the feedback booster drive device on the belt conveyor. After the use of the device, the belt conveyor can obtain greater friction traction with small initial tension of the conveyor belt, and the value of the limit friction traction force can respond to the change of load, thus reducing the risk of slip of the conveyor belt. The main work of this paper is as follows: 1. The friction driving principle of belt conveyor is deeply analyzed. A pressurized friction drive is designed to enable the booster belt to act on the conveyor belt arc at the driving drum. On the premise of considering the tension of the pressurized belt, the Euler formula of the supercharged friction drive and the calculation formula of friction traction force are derived. The feedback device is designed, through which the tension of the pressurized belt can feedback the change of the belt tension. The relationship between the feedback coefficient and the position of the center of rotation is determined by the force analysis of the feedback device. The factors affecting the strength, stiffness, deflection angle and dynamic response of the feedback device are analyzed. The control theory is applied to analyze the principle of feedback boost drive. The non-slip conditions of the conveyor belt driven by feedback pressurization are analyzed. The change of driving performance index of belt conveyor caused by feedback booster drive device under different feedback coefficient is analyzed. The benefit of this method in practical application is calculated. The simulation model of belt conveyor and feedback booster drive device is established by using RecurDyn. The changes of the speed and tension of the conveyor belt before and after the setting of the feedback booster drive device and under the different feedback coefficients are obtained by simulation, and the simulation results are analyzed. The simulation results show that the feedback booster drive device can improve the friction driving performance of belt conveyor, and the larger the feedback coefficient is, the better the friction driving performance of belt conveyor is. RecurDyn simulation results are in good agreement with the formula calculation results. This paper provides a theoretical basis for improving the friction traction of belt conveyor and the design of feedback booster drive device.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD528.1

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