摘要
分析了超超临界汽轮机部件采用蒸汽冷却技术的重要性,介绍了超超临界汽轮机喷嘴室、高压转子、中压转子、低压转子和汽缸的冷却结构的设计特点。提出了超超临界汽轮机冷却结构设计的关键技术,内容包括冷却参数的选取、部件温度场和应力场的有限元计算分析以及冷却效果的测量和验证。采用蒸汽冷却技术,可以提高材料的使用等级,有利于延长超超临界汽轮机部件的设计寿命。
Importance of using steam cooling technique for ultra supercritical steam turbine components is analyzed. Design characteristics for cooling structure of nozzle chamber, high pressure rotor, intermediate pressure rotor, low pressure rotor and casing of ultra supercritical steam turbines are described together with key technique for cooling structure design of ultra supercritical steam turbines. The key techniques included cooling parameter design, finite element anlysis of temperature fields and stress fields for components as well as measurement and verification for cooling results. Application of the steam cooling technique is useful to lift use class of component materil and expand the design life of ultra supercritical steam turbine components. Figs 8 and refs 8.
出处
《动力工程》
CSCD
北大核心
2003年第6期2735-2739,2760,共6页
Power Engineering
关键词
超超临界机组
汽轮机
冷却技术
可靠性设计
结构设计
ultra supercritical unit
steam turbine
cooling technique
reliability design
structure design
