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Research on creep/fatigue life of high pressure rotor in steam turbine for new power systems
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Siyuan CHEN1, Chang HUANG1, Weiliang WANG1, Junfu LYU2, 3, Xiwei KE2, 3, Zhidong LIU4, Qingzhong MA5
Thermal Power Generation | 2024, 53(10) : 106 - 113
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Thermal Power Generation | 2024, 53(10): 106-113
• Thermal energy science research •
Research on creep/fatigue life of high pressure rotor in steam turbine for new power systems
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Siyuan CHEN1, Chang HUANG1, Weiliang WANG1, Junfu LYU2, 3, Xiwei KE2, 3, Zhidong LIU4, Qingzhong MA5
Affiliations
  • 1.MOE Key Lab of Disaster and Control in Engineering, International Energy School (Energy and Electricity Research Center), Jinan University, Zhuhai 519070, China
  • 2.Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
  • 3.Shanxi Research Institute of Huairou Laboratory, Taiyuan 030006, China
  • 4.Guangdong Zhuhai Jinwan Power Generation Co., Ltd., Zhuhai 519050, China
  • 5.Shanxi Guojin Coal Power Co., Ltd., Jiaocheng 030500, China
Published: 2024-10-25 doi: 10.19666/j.rlfd.202403060
Outline
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Under deep peak shaving and variable operating conditions of thermal power units, significant changes in steam temperature have caused a significant increase in thermal stress in some structures of the units, which accelerated structural damage, and resulted in frequent safety accidents. To solve these problems, by taking the regulating stage rotor of a 300 MW steam turbine as the object, and Ansys software is used to analyze the thermal stress, aerodynamic force, and centrifugal force of the blades. Firstly, structural optimization is carried out on root of the blade to significantly eliminate the unreasonable local stress concentration phenomenon commonly found in conventional calculations. Then, the distribution laws of temperature and stress fields in the regulating stage under different conditions such as steady-state and transient during the deep peak shaving process of thermal power units are revealed. Moreover, the effects of the temperature and stress fields on safety performance of the unit are also investigated. The results indicate that, the maximum equivalent stress increases by about 24% under steady-state conditions with temperature difference of different nozzle groups of 50 ℃. The transient load increase rate of 5% THA/min is about three times higher than that of 2% THA/min, causing low cycle fatigue damage to the rotor. Compared with steady-state operating conditions, increasing the load once a day at a rate of 2% THA/min from half load to full load increases the overall damage by about 38%.

deep peak shaving  /  regulating stage  /  steam turbine rotor  /  thermal stress  /  creep and fatigue
Siyuan CHEN, Chang HUANG, Weiliang WANG, Junfu LYU, Xiwei KE, Zhidong LIU, Qingzhong MA. Research on creep/fatigue life of high pressure rotor in steam turbine for new power systems[J]. Thermal Power Generation, 2024 , 53 (10) : 106 -113 . DOI: 10.19666/j.rlfd.202403060
Funding
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  • Zhuhai Industry-University-Research Cooperation Project(2220004003010)
  • Fundamental Research Funds for the Central Universities(21622420)
Appendix
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Year 2024 volume 53 Issue 10
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127
56
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Article Info
doi: 10.19666/j.rlfd.202403060
  • Receive Date：2024-03-02
  • Online Date：2026-03-05
  • Published：2024-10-25
Article Data
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History
  • Received：2024-03-02
Funding
Zhuhai Industry-University-Research Cooperation Project(2220004003010)
Fundamental Research Funds for the Central Universities(21622420)
Affiliations
    1.MOE Key Lab of Disaster and Control in Engineering, International Energy School (Energy and Electricity Research Center), Jinan University, Zhuhai 519070, China
    2.Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
    3.Shanxi Research Institute of Huairou Laboratory, Taiyuan 030006, China
    4.Guangdong Zhuhai Jinwan Power Generation Co., Ltd., Zhuhai 519050, China
    5.Shanxi Guojin Coal Power Co., Ltd., Jiaocheng 030500, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202403060
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表12种不同金属材料的力学参数
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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