Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant
Transverse cracking occurred in the blade body of the last stage of the low pressure rotor of a 200MW unit in a thermal power plant. The causes of blade cracking were analyzed by means of macro morphology, SEM, microstructure, mechanical properties, chemical composition and energy spectrum analysis....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_06010.pdf |
| _version_ | 1818333212418506752 |
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| author | Xie Liming Tian Feng Liu Jun Chen Hao |
| author_facet | Xie Liming Tian Feng Liu Jun Chen Hao |
| author_sort | Xie Liming |
| collection | DOAJ |
| description | Transverse cracking occurred in the blade body of the last stage of the low pressure rotor of a 200MW unit in a thermal power plant. The causes of blade cracking were analyzed by means of macro morphology, SEM, microstructure, mechanical properties, chemical composition and energy spectrum analysis. The results show that the corrosive Cl- accumulates on leaves, and then combined action of tensile stress is formed with the static load and dynamic load during the blade operation, and the stress corrosion microcracks had been conceived in the Cl- corrosion region. Under the long period cyclic excitation stress of the blade during the rotor rotation at high speed, the crack source extends in fatigue mode, finally resulting in cracking. |
| first_indexed | 2024-12-13T13:48:03Z |
| format | Article |
| id | doaj.art-ed9acd717a1b4ab193ee1c6ebe93a792 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-13T13:48:03Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-ed9acd717a1b4ab193ee1c6ebe93a7922022-12-21T23:43:19ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011650601010.1051/e3sconf/202016506010e3sconf_caes2020_06010Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plantXie Liming0Tian Feng1Liu Jun2Chen Hao3Inner Mongolia Power Research InstituteInner Mongolia Power Research InstituteInner Mongolia Power Research InstituteInner Mongolia Power Research InstituteTransverse cracking occurred in the blade body of the last stage of the low pressure rotor of a 200MW unit in a thermal power plant. The causes of blade cracking were analyzed by means of macro morphology, SEM, microstructure, mechanical properties, chemical composition and energy spectrum analysis. The results show that the corrosive Cl- accumulates on leaves, and then combined action of tensile stress is formed with the static load and dynamic load during the blade operation, and the stress corrosion microcracks had been conceived in the Cl- corrosion region. Under the long period cyclic excitation stress of the blade during the rotor rotation at high speed, the crack source extends in fatigue mode, finally resulting in cracking.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_06010.pdf |
| spellingShingle | Xie Liming Tian Feng Liu Jun Chen Hao Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant E3S Web of Conferences |
| title | Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant |
| title_full | Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant |
| title_fullStr | Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant |
| title_full_unstemmed | Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant |
| title_short | Analysis on the Causes of Cracking at the Last Stage Blade of the Low-pressure Rotor in thermal power plant |
| title_sort | analysis on the causes of cracking at the last stage blade of the low pressure rotor in thermal power plant |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_06010.pdf |
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