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《Electrical Equipment》 2004-06
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Comprehensive Research on the Solid Particle Erosion of Supercritical Pressure Steam Turbine

LIU Zhi-jiang (Xi'an Thermal Power Research Institute,Xi'an 710032,China)  
Based on the investigation of solid particle erosion(SPE) damages of supercritical and non-supercritical pressure steam turbines at home and abroad, and its impacts on the safety and economic performance of the turbines, the paper introduces the formation and characteristics of solid particles and the main research results of particles increment properties in the governing stage and reheating stage of supercritical pressure tnrbines by using the numerical calculation method, then analyse the erosion mechanism and property in the nozzles and moving blades of steam flow path.The paper also briefs the nozzle or moving blade surface hardening treatment technology,including plasma spraying and diffusion layer for preventing the nozzle and moving blade from SPE. Finally the paper summarizes the comprehensive effective measures for preventing the supercritical pressure unit from SPE,Which are also effective for preventing the non-supercritical pressure unit from SPE.
【Fund】: 国家重大技术装备研制(科技攻关)计划项目
【CateGory Index】: TG172
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