摘要
为了解决小型增压锅炉在间歇供汽过程中因径向温差和内部压力变化引起的疲劳损伤问题,通过间歇供汽工况的试验确定了锅筒的边界条件,采用ANSYS Workbench 19.2对间歇供汽工况下小型增压锅炉锅筒进行瞬态有限元分析,基于第四强度理论对锅筒危险区域进行疲劳寿命评估。结果表明:间歇供汽过程中锅筒的危险点始终在辐射区第2排第2根管孔边缘,最大应力强度为91.222 MPa;单次间歇供汽工况下锅筒的疲劳损耗为0.59×10-23;危险点所在的管孔处应力呈对称分布,沿管孔周向靠近烟气的部分应力值较大,靠近下降管的部分温度变化相对均匀,应力值较小。
In order to solve the problem of fatigue damage caused by radial temperature difference and internal pressure change in the intermittent steam supply process of small supercharged boiler, the boundary condition of boiler drum was determined by the test of intermittent steam supply.ANSYS Workbench 19.2 was used to conduct transient finite element analysis of small supercharged boiler drum under intermittent steam supply condition, and fatigue life assessment of boiler drum hazardous area was carried out based on the fourth strength theory. The results show that in the intermittent steam supply process, the hazardous point of the drum is always at the edge of the second pipe hole in the second row in the radiation zone, and the maximum stress intensity is 91.222 MPa.The fatigue loss of the drum caused by a single intermittent steam supply process is calculated to be 0.59×10-23.At the pipe hole where the hazardous point is located, the stress is symmetrically distributed. Along the circumferential direction of the pipe hole, the stress value near the flue gas is larger, while the temperature change near the descending pipe is relatively uniform and the stress value is smaller.
作者
李晨硕
吴穷
刘凤杰
曾庆鹏
LI Chen-shuo;WU Qiong;LIU Feng-jie;ZENG Qing-peng(No.703 Research Institute of CSSC,Harbin,China,150078;College of Power and Energy Engineering,Harbin Engineering University,Harbin,China,150001)
出处
《热能动力工程》
CAS
CSCD
北大核心
2023年第1期147-155,共9页
Journal of Engineering for Thermal Energy and Power
关键词
数值模拟
瞬态分析
小型增压锅炉
锅筒
疲劳寿命
numerical simulation
transient analysis
small supercharged boiler
drum
fatigue life
