工业烧结炉温度场的研究及控制

发布时间：2018-05-13 13:01

  本文选题：温度场 + 有限元分析　； 参考：《西安理工大学》2017年硕士论文

【摘要】：近年来,我国冶金行业飞跃式的发展,国家对能源利用及环境保护有了更高的要求。工业烧结炉在材料加工中起着至关重要的作用,人们致力于研究高性能的工业烧结炉控制系统,而影响工业烧结炉性能的因素即烧结炉温度场设计及炉温的控制两方面。为此,本课题主要从三方面做进一步论述。首先,本文以温度场研究入手。介绍了以石墨为加热体的烧结炉的结构与加热过程热量传递的方式,运用有限元分析的思想,使用ANSYS对加热炉建立三维物理模型,进行温度场仿真,通过仿真结果分析加热体厚度、电阻率、加热功率等参数对加热炉加热过程中温度变化的影响,得出受热工件温度随时间变化的曲线,模拟出温度场分布云图,对工业加热过程温度场的设计制造起到了很好的指导性作用。其次,设计出了基于可编程控制器的工业烧结炉炉温控制系统。由于温度控制具有滞后性,本部分采用PID参数自整定的控制策略作为核心算法的温度控制系统。该控制系统分下位机和上位机两部分,下位机选用西门子可编程控制器作为主控制器,对系统软件进行硬件组态及控制算法的设计,以二相电力调整器作为功率调节单元,将温度误差控制在±1℃之内;上位机利用组态王开发环境,完成了人机交互界面的设计,实现了状态监控和控制操作,以及温控工艺曲线设定功能,以工控一体机作为显示,完成了视频监控及数据记录,整个系统运行可靠,达到了控制的性能指标。最后,为了提高控制系统的性价比,对温度控制进行了嵌入式的设计研究。采用ARM Cortex - M3架构的微控制器LPC1788作为主控单元,完成了软硬件的设计,基于嵌入式μC/OS-Ⅱ系统的任务调度机制,完成了嵌入式开发环境的构建及底层驱动编写。配套使用LCD液晶触摸屏作为人机交互界面,成功移植μC/GUI图形用户开发软件,完成丰富的人机交互功能。设计了基于嵌入式的烧结炉温度控制系统,达到了预期效果。
[Abstract]:In recent years, with the rapid development of metallurgical industry in China, the country has higher requirements for energy utilization and environmental protection. Industrial sintering furnace plays an important role in material processing. People devote themselves to the study of high performance industrial sintering furnace control system. The factors that affect the performance of industrial sintering furnace are the design of sintering furnace temperature field and the control of furnace temperature. To this end, this subject mainly from three aspects to do further elaboration. First of all, this paper starts with the study of temperature field. This paper introduces the structure of sintering furnace with graphite as heating body and the way of heat transfer during heating process. Using the idea of finite element analysis, the three-dimensional physical model of reheating furnace is established by using ANSYS, and the temperature field is simulated. By analyzing the influence of heating body thickness, resistivity, heating power and other parameters on the temperature change of heating furnace, the curve of temperature change with time of heated workpiece is obtained, and the distribution cloud diagram of temperature field is simulated. It plays a good guiding role in the design and manufacture of temperature field in industrial heating process. Secondly, the temperature control system of industrial sintering furnace based on programmable controller is designed. Because of the lag of temperature control, the temperature control system based on PID parameter self-tuning control strategy is used as the core algorithm. The control system is divided into two parts: lower computer and upper computer. Siemens programmable controller is chosen as the main controller. The hardware configuration and control algorithm of the system software are designed, and the two-phase power regulator is used as the power regulating unit. The temperature error is controlled within 卤1 鈩，

本文编号：1883252