【作者】 马化海；

【导师】 赵继俊；

【作者基本信息】 哈尔滨工业大学 ， 机械电子工程， 2010， 硕士

【摘要】 随着科学技术的发展,皮带运输机越来越广泛的应用于各个行业。这些机械中有许多是大转动惯量或者必须带负载启动,启动冲击则是造成设备损坏或缩短其使用寿命的主要原因,最佳的解决方法是使用软启动技术。在分析了国内外重载机械软启动的方法和研究现状后,确定了使用机电结合式软启动技术作为所设计的大型皮带运输机的启动方式。在软启动装置中,起动力合成作用的机械结构至关重要。本文以行星差动轮系为核心设计了软启动装置的机械结构,确定了正弦形加速度控制曲线作为装置的启动曲线。在此基础上,认真分析了机械结构的工作原理、运动学和动力学性能。整个软启动装置设计过程复杂,因此借助Pro/E三维软件建立了装置的虚拟样机,为物理样机的精确设计提供了保证。通过运动分析模块进行了装置的运动学和动力学仿真分析。以PLC为核心设计了装置的控制系统,并确定了主电机、调速电机、变频器等关键零部件的型号。根据工作过程的要求,本文还分别针对软启动和软停车过程设计了控制系统程序流程。在建立了软启动系统各个环节的数学模型的基础上,利用MATLAB/SIMULINK模块对系统进行了仿真研究。仿真结果表明,本文所设计的软启动系统能够满足运动要求,在重载的情况下能够实现系统可控的输出。更多还原

【Abstract】 With the development of technology, the belt conveyor is becoming more and more widely used in various industries. A lot of these mechanical equipments are big votary inertia or have to start-up with overloaded. The impact of starting is the main reason why damage the machine or shorten its life. And the best solution way is to use a soft start-up technology. On the basis of analyzing the way and research status quo of start-up technology on the overloaded machine, the mechanical-electronic soft start-up technology is decided to use as the start way on giant belt conveyor that designed.In the soft start-up equipment, the mechanism is very important. It has been designed with the planet differential gear train as the core, and the Sine-shaped acceleration control curve has been determined as the start-up curve. The thesis analyzed the mechanism’s working principle, kinematics and dynamics performance. Because of the complexity of the whole system, a virtual prototype of the device is established using the software Pro / E. which will ensure the physical prototype’s exactly design. The kinematics and dynamics simulation analysis is carried through the movement analysis module.The control system has been designed with PLC as the core. The thesis has determined the model of the motors, the frequency converter that the key spare parts. According to the requirements of the work process, the control system’s program have been designed for soft start-up and stop.On the basis of all aspects of mathematical model, the simulation experiment is made using MATLAB/SIMULINK. The result showed that the soft start-up system meet the movement requirement, the controllable output can be achieved In the case of overloading.更多还原