斗轮机斗轮直驱式液压系统静动态特性分析与设计

发布时间：2018-07-25 09:42

【摘要】：斗轮堆取料机是现代化生产中常用的一种连续堆取料机械,目前在码头、冶金、发电厂、钢铁厂等散料装卸的场合得到了广泛的应用。斗轮堆取料机中斗轮是实现其取料的关键设备,斗轮机斗轮的合理驱动对斗轮机来说极为重要。直驱式容积控制系统是近十几年快速发展起来的,目前在国外已得到了广泛的应用。与传统的阀控系统与泵控系统相比,直驱式容积控制系统有节能、效率高等诸多优点。考虑到直驱式容积控制系统的优势,本论文针对斗轮机斗轮所需要达到的技术参数,研究并设计了斗轮机斗轮直驱式容积控制系统。论文设计了斗轮机斗轮直驱式液压系统,包括系统原理图的设计和相关机械结构的设计,其中阀块的设计也简化了系统的结构;建立了各个环节的数学模型,从而得到了斗轮机斗轮直驱式容积控制系统的数学模型;通过PID控制使系统使得系统有一定的幅值裕量和相位裕量;分析了系统的频宽、响应速度、稳定精度等技术参数;分析了系统中主要参数的变化对系统性能的影响,并进行了计算机仿真研究。交流电机与直流电机相比具有结构简单、运行可靠、维修方便等优点,在工业生产中得到了广泛的应用。本设计中对异步电机的速度控制是实现马达速度控制的关键。论文中对交流异步电机先采用了变频变压控制方式并进行了数学建模与计算机仿真,然后对交流电机的控制又采用了矢量控制方式并将其应用于斗轮速度的控制,搭建了Simulink仿真模型并进行了计算机仿真研究。
[Abstract]:Bucket wheel stacker is a kind of continuous stowage machine commonly used in modern production. It has been widely used in loading and unloading of bulk materials such as wharf, metallurgy, power plant, steel plant and so on. The bucket wheel is the key equipment to realize its material collection in the bucket wheel stacker and the rational driving of the bucket wheel is very important to the bucket wheel machine. Direct drive volume control system has been developed rapidly in recent years and has been widely used in foreign countries. Compared with traditional valve control system and pump control system, direct drive volumetric control system has many advantages, such as energy saving, high efficiency and so on. Considering the advantages of direct-drive volumetric control system, this paper studies and designs the direct drive volumetric control system of bucket wheel according to the technical parameters of bucket wheel. In this paper, the hydraulic system of bucket wheel is designed, including the design of system schematic diagram and the design of related mechanical structure, in which the design of valve block also simplifies the structure of the system, and establishes the mathematical model of each link. The mathematical model of the direct drive volume control system of bucket wheel is obtained, the amplitude margin and phase margin of the system are made by PID control, the technical parameters of the system, such as frequency width, response speed and stability precision, are analyzed. The influence of the main parameters on the performance of the system is analyzed, and the computer simulation is carried out. Compared with DC motor, AC motor has the advantages of simple structure, reliable operation and convenient maintenance, and has been widely used in industrial production. In this design, the speed control of asynchronous motor is the key to realize motor speed control. In this paper, the AC asynchronous motor is controlled by variable frequency variable voltage control method, mathematical modeling and computer simulation are carried out, and then the vector control mode of AC motor is adopted and applied to the control of bucket wheel speed. The Simulink simulation model is built and the computer simulation research is carried out.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH246

【参考文献】