毕业论文设计《PLC在制氮机上的应用》.doc

精品论文 精品论文 PAGE II PAGE I 河北化工医药职业技术学院毕业论文 PLC在制氮机上的应用 作者姓名： Hebei Chemical Pharmaceutical College Project Thesis PLC in the application of nitrogen making machine Author Name：Cui Teng Da PLC在 HYPERLINK 制氮机上的应用 摘 要 在现代生产力不断提高的情况下，建设无人值守的空压站，是一个社会发展过程中的必然选择。本文主要论述了一种PLC在制氮机上的应用，采用PLC对空压机进行自动控制改造，实现空气的分离控制和生产设备的集中控制。在改造原有系统的基础上，将 HYPERLINK 制氮机电机的直接启动控制方式改为变频控制，减小对系统电网的冲击和节约能源，同时制定了具体实施的控制方式、设备启停步骤、软件功能、功能扩充、报警系统。并利用相应的控制算法，实现供气的恒定，提高供气质量和效率，保证各项工作的安全生产。 关键词：PLC，制氮机，自动控制 PLC in the application of nitrogen making machine Abstract In modem productivity continuously improve, under the situation of the construction of the unmanned air compressor station, is a social development process in the inevitable choice. This paper mainly describes a kind of PLC in nitrogen making machine, the application of PLC in air compressor for automatic control transformation, realize the air separation control and production equipment of centralized control. In transforming the original system based on nitrogen making mechanical and electrical machine, the direct startup control method to frequency conversion control, reducing the impact of the grid system and energy saving, and formulate the concrete implementation control mode, equipment start-stop steps, software function and function expansion, alarm system. And by using the corresponding control algorithm, realize supply of gas supply constant, improve the quality and efficiency, and ensure each work of safety for production. Key words：PLC, Nitrogen making machine,Auto – control 目 录 第一章 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc230945493 绪论 PAGEREF _Toc230945493 \h 1 HYPERLINK \l _Toc230945494 第二章 系统构成及工作原理 PAGEREF _Toc230945494 \h 1 § HYPERLINK \l _Toc230945495 2-1设计方案的确定 PAGEREF _Toc230945495 \h 1 § HYPERLINK \l _Toc230945496 2-2系统构成 PAGEREF _Toc230945496 \h 2 § HYPERLINK \l _Toc230945497 2-3工作原理 PAGEREF _Toc230945497 \h 3 § HYPERLINK \l _Toc230945498 2-4控制过程 PAGEREF _Toc230945498 \