作者：张伟江, 李宁, 李晖, 马辉
作者单位：国网河北能源技术服务有限公司，河北 石家庄 050095
关键词：汽轮发电机组;高位布置;弹簧隔振;模态分析;有限元分析
摘要：
发展高效低碳清洁发电技术是实现“碳达峰”和“碳中和”的有效途径，高位布置汽轮机组可有效缩短主蒸汽、再热蒸汽和排汽管道，并为建设700 ℃超超临界燃煤发电机组打下坚实的基础。基于国内外研究现状，以世界首例陕西国华锦界电厂三期2×660 MW超超临界高位布置汽轮发电机组基础台板为研究对象，使用Solidworks软件建立基础台板的有限元模型，并使用有限元软件ANSYS对其进行模态动力学分析，得到汽轮机基础台板的动态特征。研究表明：汽轮机1.4倍转速范围内基础台板的固有频率可以有效避开汽轮机的工作频率50 Hz，不会发生共振；对其施加0.2倍转子重力的扰力后，基础的最大振动线位移在0 ~3900 r/min的转速范围内均满足规范要求，保证机组的安全运行。研究结果对改善厂房结构、提高煤电机组发电效率具有一定的参考意义。
Research on the dynamic characteristics of the foundation plate of high position steam turbine generator unit
ZHANG Weijiang, LI Ning, LI Hui, MA Hui
State Grid Hebei Energy Technology Service Co., Ltd., Shijiazhuang 050095, China
Abstract: The development of high-efficiency, low-carbon and clean power generation technology is an effective way to achieve “carbon peak” and “carbon neutrality”. The higher floor layout of steam turbine units can effectively shorten the main steam, reheat steam and exhaust steam pipelines, which is an effective way for the construction of 700 ℃ ultra-supercritical combustion. A solid foundation has been laid for coal power generation units. Based on the research status at home and abroad, taking the world’s first 2×660 MW ultra-supercritical high-level turbine generator set base plate in the third phase of Shaanxi Guohua Jinjie Power Plant as the research object, Solidworks software is used to establish the finite element model of the base plate. The modal dynamic analysis is carried out to obtain the dynamic characteristics of the base plate of the steam turbine. Studies have shown that the natural frequency of the base platen within 1.4 times the speed range of the steam turbine can effectively avoid the working frequency of the steam turbine at 50 Hz, and resonance will not occur. After the disturbance force of 0.2 times the rotor gravity is applied, the maximum vibration line displacement of the foundation meets the specification requirements within the speed range of 0 -3900 r/min, which ensures the safe operation of the unit. The research results are of certain reference significance for improving the structure of the plant and increasing the power generation efficiency of coal-fired power plants.
Keywords: steam turbine generator unit;high level layout;spring vibration isolation;modal analysis;finite element analysis
2023, 49(4):140-145 收稿日期: 2021-06-10;收到修改稿日期: 2021-09-27
基金项目: 国网河北能源技术服务有限公司科技项目（TSS2020-09）
作者简介: 张伟江(1975-),男,河北石家庄市人,高级工程师,硕士,研究方向为汽轮机设备状态监测与故障诊断
参考文献
[1] 郭宏恩. 核电汽轮机凝汽器运行参数动态特性仿真研究[J]. 中国测试, 2019, 45(8): 55-60
[2] 胡乔良, 李伟, 郜宁, 等. 基于供热负荷的吸收式热泵供热机组变工况性能分析[J]. 中国测试, 2020, 46(11): 163-168
[3] 钟犁, 肖平, 江建忠, 等. 我国700℃关键部件验证试验平台方案设计及建设试运相关问题研究[J]. 中国电机工程学报, 2017, 37(6): 1739-1746
[4] 王树民, 吕智强, 宋畅, 等. 汽轮发电机组高位布置基础振动试验研究[J]. 中国电机工程学报, 2021, 41(12): 4217-4226
[5] 王威, 陆思逵, 杨成忠, 等. 汽轮机基础选型及结构抗震性能[J]. 上海交通大学学报, 2020, 54(7): 736-744
[6] 张玉皓, 顾煜炯, 马晓腾, 等. 核电汽轮机组扭振在线监测装置的设计与应用[J]. 中国测试, 2020, 46(7): 125-132
[7] 李红霞, 付旭, 王敏杰, 等. 汽轮发电机基础动力特性分析及优化设计[J]. 应用力学学报, 2018, 35(1): 178-184
[8] 罗忠, 朱云鹏, 韩清凯, 等. 动力学相似理论及在结构振动分析中的应用研究评述与展望[J]. 机械工程学报, 2016, 52(23): 114-134
[9] ZUBRITSKIY M. Seismic resistance estimation of existing turbogenerator foundation structures under ductility level earthquake impact by nonlinear static method[J]. IOP Conference Series:Materials Science and Engineering, 2021, 1030(1): 012028
[10] 代泽兵, 朱祝兵, 汪浩, 等. 热电联产燃汽轮机机组汽轮发电机基础动力特性研究[J]. 武汉大学学报(工学版), 2013, 46(S1): 230-235
[11] 刘菊, 张波. 潍坊电厂670MW汽轮发电机基础振动实测分析[J]. 武汉大学学报(工学版), 2008, 41(S1): 185-188
[12] 李博, 闫万贵, 张明, 等. 高位布置汽轮机基础隔振弹簧安装工艺[J]. 建筑技术开发, 2020, 47(11): 80-81
[13] 周炬, 苏金英. ANSYS Workbench有限元分析实例详解[M]. 北京: 人民邮电出版社, 2017: 482.
[14] 冀成, 杨兆建, 庞新宇, 等. 基于ANSYS旋转机械模块的转子动力特性分析[J]. 机械工程与自动化, 2012(4): 1-3
