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超超临界汽轮机发电技术是高效率和低排放发电的一个选择。它的蒸汽温度和压力超过其用在传统超临界电厂中的数值。这种新的蒸汽工况对汽轮机组提出了新的要求。可以通过采用3DVT(M可变反动度三维设计)的先进叶型和叶片通道技术、新开发的钛制末级叶片、先进的密封工艺以及能够应付高达30MPa/600℃/620℃蒸汽条件的所有高温部件材料的发展等,来应对效率增加的要求。文章对超超临界汽轮机组部件设计、密封工艺、叶片通道形式以及材料研究提出要求及设计解决方案。对未来主蒸汽和再热蒸汽达700℃时汽轮机的设计提出设想。
Ultra-supercritical steam turbine power generation technology is an efficient and low-emission power generation option. Its steam temperature and pressure exceed its values used in conventional supercritical power plants. This new steam condition puts forward new requirements for steam turbines. Advanced blade and vane channel technology with 3DVT (M Variable Dynamic Three-Dimensional Design), newly developed titanium last-stage vanes, advanced sealing technology, and the ability to handle all of the steam conditions up to 30MPa / 600 ° C / 620 ° C The development of high-temperature parts and materials, to meet the requirements of increased efficiency. This paper puts forward requirements and design solutions for the design of ultra-supercritical steam turbine unit, sealing technology, the form of vane passage and material research. Proposed the design of steam turbine when the main steam and reheat steam reached 700 ℃ in the future.