复合结构钢水连续测温传感器有限元分析  

Finite Element Analysis of Composite Structure Continuous Temperature-Measuring Sensor for Liquid Steel

作　　者：赵树茂[1] 梅国晖[1] 张玖[1] 谢植[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第7期926-929,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2006AA040309);中央高校基本科研业务费专项资金资助项目(N110404029)

摘　　要：提出了一种由鳞片石墨质量分数分别为20%和30%的Al2O3-C材质构成的复合结构钢水连续测温传感器,以解决钢水连续测温系统响应速率慢的问题.为研究其有效性及可行性,采用有限元法对该传感器在开浇过程中的传热和瞬态热应力场进行分析.结果表明,复合结构钢水连续测温传感器热应力最大区域位于传感器本体部分内壁,靠近本体与测温段结合部位,应力最大约为4 MPa,小于传感器的强度.在能够满足强度要求的同时,采用复合结构能够显著提高传感器响应速率,达到实际温度的98%所用时间小于原有传感器的一半.A composite structure sensor which was composed of A1203-C refractories containing 20% and 30% graphite was proposed to overcome the problem of slow response speed of continuous temperature-measuring system for liquid steel. To study the effectiveness and feasibility of the proposed sensor, a finite element method was used to investigate the heat transfer and transient thermal stress during start process of teeming for this sensor. The results indicated that the maximum thermal stress occurs at the inside wall of the sensor＇s body and closes to the junction between body and measuring section. The maximum stress is about 4 MPa, which is smaller than the strength of sensor. The adoption of composite structure can improve response rate obviously. To reach 98 % of actual temperature, the proposed composite structure sensor needs only half of the time that the original sensor needs.

关 键 词：钢水连续测温 传感器 有限元 响应速率 热应力 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]