1、重车调车机自动控制系统设计 摘 要 本设计以翻车机自动控制系统中的重车调车机为控制对象， 完成重车调车机自动控 制系统的硬件及软件设计，着重硬件部分设计，内容包括主电路设计和液压系统设计。 具体包括：控制方案选择及论证-整体控制方案比较、PLC 品牌和型号的确定、牵引臂 传动控制方案、调速控制方案的确定等内容。主电路设计部分由 4 台主驱动电机、一台 油泵电机、一台循环电机及相关的保护设备组成。供电方式涉及电机型号选择、导线及 电缆选择、接触器和熔断器选择、变频器及其它设备选择等。控制电路部分设计-PLC 选择、低压器件选择、S7-300 的通信功能等等。软件部分主要是介绍所采用的编程软 件、
2、地址分配以及流程图等内容。系统以 PLC 为核心，配以低压电器装置、控制电动机、 液压阀等协调动作，实现重车调车机调车过程的自动化。在该设计中，主要应用工业企 业供电，工厂电器 PLC 原理，运动控制系统中变频调速及自动控制原理等的相关内容进 行设计。本设计采用可编程控制器控制，实现了全自动化，提高了系统的可靠性。 关键词关键词：PLC；液压系统；变频调速；电动机；重车吊车机 Abstract The design according with the object of weight crane in the over-turn engine automatic control system
3、, completes the designs of hardware and software in this system, emphasizing the former design, and concluding the main circuit design and the hydraulics system introduction in the content. Concluding concretely: the control projects choosing and statement-the whole control projects comparing, the b
4、rands and types of PLC, the transmission schemes of the tow arm and the speed control and so on. The main circuit design composes of four main drive electromotors, one fuel pump electromotor, one circle electromotor and relative protecting equipments. Power supply manners involve the electromotors c
5、hoosing, the conduits and cable types, contactors and fuses choosing, transducers and other equipments choosing. The controlling circuit part designPLC and low pressure parts, communication function of S7-300 and so forth. The software part mainly introduces the used programmable software, address d
6、istributions and the flow charts. The core of the system is PLC, matched with the low pressure fixtures, controlling electromotor, hydraulic pressure valves action, realizing the automation of the system. In this design, we mainly use industry corporation power supply, PLC principle, frequency conversion in movement control system and auto control principle to design. And the design adopts programmable logic controller to control, realizing the automation, enhancing the reliability of the s
