组态与PLC技术在变转速液压系统中的应用

发布时间：2018-10-26 12:19

【摘要】：变转速液压技术作为一种新型的传动方式,它能够减少因节流调速而损失的能量,提高系统的效率,随着变频技术的发展,可以实现对电机无极调速,系统的调速精度更高,在液压系统中应用越来越广泛。但是变转速调速系统也存在着一些问题,为了使该技术能够更广泛的应用,本文提出将PLC技术,液压控制,检测技术和组态技术有机结合起来,实现了变转速液压系统各个参数实时监控和动态显示。本文介绍了变转速液压技术国内外研究现状,在变转速液压系统传动原理的基础上,根据系统要求,设计以PLC为下位机的核心控制部件,PC机作为上位机的监控系统。进行了变转速液压试验台的硬件设计和控制系统的软件设计,对PLC和模拟模块进行了选型,对PLC和PC机的通讯进行了设置,PLC和变转速液压试验台传感器的连接及数据传输方式进行了设计,PLC对变转速液压系统的开关量和模拟量进行控制,及控制系统在GX Developer7.0软件下的PLC梯形图的编写。本文就变转速液压系统的组态画面进行了设计,各种变量的设置,包括变量的类型、大小、报警等参数设置,组态画面的各个控件的绘制,组态数据库的建立,组态软件程序的编写等,实现了变转速液压实验台的开环控制。在变转速液压试验台上进行实验,根据实验数据的分析,表明该监控系统对变转速液压试验台监控效果良好,达到了监控系统的设计。基于PLC和组态技术的变转速液压系统具有运行稳定、自动化程度高、控制方便,组态画面能够实时动态显示液压系统运行状态等特点,该监控系统具有较高的精度和实用性,为变转速液压监控系统的进一步研究提供了良好的平台。同时根据需要,可以方便的在本监控系统的基础上进行功能扩展以适应更广泛的系统需求。
[Abstract]:As a new type of transmission, variable speed hydraulic technology can reduce the energy loss due to throttling speed regulation and improve the efficiency of the system. With the development of frequency conversion technology, it can realize electrodeless speed regulation of the motor, and the system speed regulation accuracy is higher. It is more and more widely used in hydraulic system. However, there are some problems in variable speed regulation system. In order to make the technology more widely used, this paper proposes to combine PLC technology, hydraulic control technology, detection technology and configuration technology organically. The real-time monitoring and dynamic display of the parameters of variable speed hydraulic system are realized. This paper introduces the research status of variable speed hydraulic technology at home and abroad. Based on the transmission principle of variable speed hydraulic system and according to the system requirements, this paper designs a monitoring system with PLC as the core control component of the lower computer and PC computer as the upper computer monitoring system. The hardware design and software design of the hydraulic test-bed with variable rotational speed are carried out. The PLC and the simulation module are selected, and the communication between PLC and PC is set up. The connection and data transmission mode of PLC and variable speed hydraulic test-bed sensor are designed. The switch quantity and analog quantity of variable speed hydraulic system are controlled by PLC, and the PLC trapezoid diagram of the control system under GX Developer7.0 software is compiled. In this paper, the configuration screen of the hydraulic system with variable speed is designed, and the setting of various variables, including the type, size, alarm and other parameters of the variable, the drawing of each control of the configuration screen, the establishment of configuration database, etc. Configuration software program, such as the implementation of variable speed hydraulic test bench open-loop control. The experiment was carried out on the hydraulic test rig with variable rotational speed. According to the analysis of the experimental data, it is shown that the monitoring system has a good monitoring effect on the hydraulic test rig with variable rotational speed, and the design of the monitoring system has been achieved. The variable speed hydraulic system based on PLC and configuration technology has the characteristics of stable operation, high automation, convenient control, and the configuration picture can dynamically display the running state of hydraulic system in real time. The monitoring system has high precision and practicability. It provides a good platform for further research of variable speed hydraulic monitoring system. At the same time, according to the need, we can expand the function on the basis of the monitoring system to meet the needs of the wider system.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137

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