目录
摘要 (2)
一.设计题目 (5)
二.工况分析 (6)
三.拟定液压系统原理 (8)
四.机械系统设计方案 (13)
五.液压系统设计方案 (23)
六.PLC设计 (35)
七.总结 (45)
八.参考文献 (46)
摘要
液压传动相对于机械传动来说，是一门发展较晚的技术。自18世纪末英国制成世界上第一台水压机算起，液压传动技术只有二三百年的历史。直到20世纪30年代它才较普遍地用于起重机、机床及工程机械。在第二次世界大战期间，由于战争需要，出现了由响应迅速、精度高的液压控制机构所装备的各种军事武器。第二次世界大战结束后，战后液压技术迅速转向民用工业，液压技术不断应用于各种自动机及自动生产线，从而使它在机械制造、工程机械、农业机械、汽车制造等行业得到推广应用。
机电专业课程设计环节是为了学生能够更好地巩固和实践所学专业知识而设置的，在本次课程设计中，我们以机电传动控制以及液压与气压传动中所学知识为基础，设计了压块机液压及控制系统。本系统的液压系统主要由液压缸，换向阀，溢流阀，压力继电器，插装阀及各类泵组成，能实现颗粒散料的压制加工。PLC控制部分主要由定时器，继电器及行程开关组成，对整个液压系统的起控制作用
论文介绍了应用PLC技术对升降平台液压系统进行控制的设计方法和实现过程。采用PLC控制，提高了该机器的可靠性，降低了人力成本，提高了企业的经济效益。由于该行业在生产过程中，要求提高生产自动化。若完全采用液压控制，这种控制方式电子线路复杂、继电器使用数量多，造成电气控制部分可靠性差、故障率高，日常维护量大。随着可编程控制器（PLC）技术的发展，把PLC 控制技术应用于装药机液压装置的控制中，取代原有的液压装置控制线路。简化了电器控制电路，提高了可靠性，取得了很好的使用效果。并且易于修改控制程序，提高了控制系统的可扩展性。
关键字：升降平台，液压控制，可编程控制器，可靠性。
Abstract
Relative to the hydraulic mechanical transmission, it is a late development of the technology. Since the 18th century the British made the world's first counting hydraulic press, hydraulic drive technology is only two or three hundred years of history. 30 years until the 20th century it was more commonly used in cranes, machine tools and construction machinery. During World War II, the War, emerged from the rapid response and high precision hydraulic control agencies of various military weapons and equipment. After World War II, after the war quickly to civilian industrial hydraulic technology, hydraulic technology continues to apply all kinds of automatic machines and automatic production lines, making it the machinery, engineering machinery, agricultural machinery, automotive manufacturing and other industries promote the use of .
60 years since the 20th century, with the hydraulic technology of atomic energy, space technology, computer technology and rapid development and penetration into various industrial fields. Hydraulic technology has begun to high-speed, high-pressure, high power, high efficiency, low noise, durable, highly integrated direction. At the same time, new hydraulic components and hydraulic systems computer-aided design (CAD), computer-aided test (CAT), computer direct control (CDC), mechanical and electrical integration technologies, reliability, technology, and also the current hydraulic drive and control technology development and research direction.
This paper describes the application of PLC technology to charge hydraulic system to control the design and implementation process.With PLC control and improve the reliability of the machine, reducing labor costs and improve the economic efficiency of
