660 MW机组再热器减温水调节阀有限元计算与分析
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摘要
针对国家重大技术装备战略发展清洁高效燃煤技术的需要,研发一种用于660 MW超临界机组再热器减温水调节阀。为保证阀门结构的安全可靠性,利用有限元法对再热器减温水调节阀进行不同载荷下强度校核,同时模拟电厂作业工况进行热结构耦合分析;为了解振动特性,对阀门整体结构进行预应力模态分析。结果表明:再热器减温水调节阀材料选择合理,结构强度满足设计要求,并有一定的安全欲度;模态分析得到了阀门的固有频率及相应振型,进而为避免与系统管道共振、降低噪声提供依据,对工程中再热器减温水调节阀的设计及运行具有指导意义。
In view of the need to develop clean and efficient coal-fired power plant for the national major technology and equipment, the development of a new type of 660 MW supercritical unit reheater spraying water valve is introduced. In order to ensure the safety and reliability of valve structure, the finite element method is used to check the strength of reheater spraying valve under different loads, and the thermal structure coupling analysis of power plant operation is simulated. In order to understand the vibration characteristics, the prestress modal analysis of the valve structure is carried out. The results show that the materials of the reheater spraying water valve are reasonable, the structural strength meets the design requirements and has a certain degree of safety; the natural frequencies and corresponding vibration modes of the valve are obtained through modal analysis. In order to avoid resonance with the system piping, providing a basis for reducing noise.
In view of the need to develop clean and efficient coal-fired power plant for the national major technology and equipment, the development of a new type of 660 MW supercritical unit reheater spraying water valve is introduced. In order to ensure the safety and reliability of valve structure, the finite element method is used to check the strength of reheater spraying valve under different loads, and the thermal structure coupling analysis of power plant operation is simulated. In order to understand the vibration characteristics, the prestress modal analysis of the valve structure is carried out. The results show that the materials of the reheater spraying water valve are reasonable, the structural strength meets the design requirements and has a certain degree of safety; the natural frequencies and corresponding vibration modes of the valve are obtained through modal analysis. In order to avoid resonance with the system piping, providing a basis for reducing noise.
引文
[1]黄其励.我国清洁高效燃煤发电技术[J].华电技术,2008,(3).
[2]周鹤良.中国大容量火电机组的高速发展及清洁高效利用[J].电气技术,2014,(8):4-5.
[3]徐云,金熊.再热器减温水调节阀运行异常的分析与改进[J].上海电力学院学报,2015,(2).
[4]关金峰,王军,魏铁铮.再热蒸汽喷水减温的热经济性分析[J].华东电力,2001,(1):20-22.
[5]宋大勇,文岩,吴炬.600MW超临界锅炉再热器事故减温水量大原因分析及措施[J].锅炉技术,2013,44(5):62-65.
[6]李涛,左正兴,廖日东.结构仿真高精度有限元网格划分方法[J].机械工程学报,2009,45(6):304-308.
[7]张应迁,柳忠彬,刘明,等.模态综合法在阀门模态分析中的应用[J].机械设计与制造,2012,5(5):103-105.
[8]梁君,赵登峰.模态分析方法综述[J].现代制造工程,2006,(8):139-141.
[2]周鹤良.中国大容量火电机组的高速发展及清洁高效利用[J].电气技术,2014,(8):4-5.
[3]徐云,金熊.再热器减温水调节阀运行异常的分析与改进[J].上海电力学院学报,2015,(2).
[4]关金峰,王军,魏铁铮.再热蒸汽喷水减温的热经济性分析[J].华东电力,2001,(1):20-22.
[5]宋大勇,文岩,吴炬.600MW超临界锅炉再热器事故减温水量大原因分析及措施[J].锅炉技术,2013,44(5):62-65.
[6]李涛,左正兴,廖日东.结构仿真高精度有限元网格划分方法[J].机械工程学报,2009,45(6):304-308.
[7]张应迁,柳忠彬,刘明,等.模态综合法在阀门模态分析中的应用[J].机械设计与制造,2012,5(5):103-105.
[8]梁君,赵登峰.模态分析方法综述[J].现代制造工程,2006,(8):139-141.