1000MW燃煤锅炉水冷壁管道结构力学特性研究
Research on Mechanical Properties of the Water Wall Tube Structure of 1 000 MW Coal-fired Boiler
熊伟 1邵林芳 1李来春 1李晓燕 1罗利佳 2王银成2
作者信息
- 1. 华能(浙江)能源开发有限公司玉环分公司 台州 317604
- 2. 浙江工业大学 机械工程学院 杭州 310023
- 折叠
摘要
水冷壁是电站锅炉的重要构件,由于受结构不连续和操作工况波动的影响,水冷壁的应力状态极其复杂且多变,可能导致水冷壁发生应力破坏.水冷壁应力状态的分析依赖于水冷壁结构的力学特性.本文通过试验和仿真研究了水冷壁结构的力学特性,建立了轴向拉伸时管外壁的应力-应变关系以及受热自然膨胀时管外壁的应变-温度关系,揭示了管内螺纹对管内壁的应变和应力影响规律,计算了螺纹根部的应力集中系数,分析了温度对水冷壁力学特性的影响.本文的研究结果对于水冷壁的结构应力分析以及应变、应力和膨胀量的测算有一定参考作用.
Abstract
Water wall is an important component of power plant boiler,its stress state is very complicated and inconstant due to the effects of the structural discontinuity and fluctuating operating conditions,which may cause stress failures of the water wall.The analysis of the stress state of the water wall depends on mechanical properties of the water wall structure.In this paper,mechanical properties of the water wall structure are studied by experiments and simulations.The stress-strain relationship on the tube's outer wall under the axial tensile force and the strain-temperature relationship on the tube's outer wall under thermal expansion are established.The effects of internal threads on the strain and stress on the tube's inter wall are revealed.The stress concentration coefficient at the root of thread is calculated.The effects of the temperature on mechanical properties of the water wall are analyzed.The results of this paper are very important to the structural stress analysis of the water wall and the measurement and calculation of the strain,stress and thermal expansion.
关键词
水冷壁/力学特性/应力/应变/热膨胀Key words
Water wall/Mechanical properties/Stress/Strain/Thermal expansion引用本文复制引用
基金项目
中国华能集团有限公司科学技术项目(Fw02-2022-0055)
出版年
2024
NETL
NSTL
万方数据