Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine
During the operation of a thermal power unit’s high-pressure bypass （HPB） system， excessive vibration caused the breakage of the attached pressure-tapping tube. After the vibration reduction modification， it is required to analyze the vibration alternating stress level of the pressure-tapping tube a...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
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zhejiang electric power
2023-01-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=e2b24e9f-1515-43ff-b8cc-c71770467dcb |
| _version_ | 1811165364502921216 |
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| author | ZHANG Weiyong ZHOU Shuai CHEN Haixin HE Shi LIU Haoyuan XU Decheng LIU Yinli |
| author_facet | ZHANG Weiyong ZHOU Shuai CHEN Haixin HE Shi LIU Haoyuan XU Decheng LIU Yinli |
| author_sort | ZHANG Weiyong |
| collection | DOAJ |
| description | During the operation of a thermal power unit’s high-pressure bypass （HPB） system， excessive vibration caused the breakage of the attached pressure-tapping tube. After the vibration reduction modification， it is required to analyze the vibration alternating stress level of the pressure-tapping tube and assess its safety. To this end， the vibration alternating stress level at the cracked location of the pressure-tapping tube is measured by the strain test method under the change of differential pressure and opening degree before and after the high-pressure bypass valve. The relationship between the vibration alternating stress magnitude of the pressure-tapping tube and the differential pressure before and after the high-pressure bypass valve and its opening degree is analyzed. The critical operating parameters for the potential fatigue fracture of the pressure-tapping pipelines are given： when the opening degree of the high-pressure bypass valve is 35%， and its differential pressure exceeds 3.70 MPa， the fatigue fracture of the pressure-tapping tube may occur. Finally， it is concluded through analysis that the high-pressure bypass vibration mainly comprises high-frequency vibration due to the high-frequency acoustic energy， which excites and amplifies the high-frequency vibration on the pipeline wall. |
| first_indexed | 2024-04-10T15:36:07Z |
| format | Article |
| id | doaj.art-e828322bbe944f4ba1d6f14c0d5548dd |
| institution | Directory Open Access Journal |
| issn | 1007-1881 |
| language | zho |
| last_indexed | 2024-04-10T15:36:07Z |
| publishDate | 2023-01-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj.art-e828322bbe944f4ba1d6f14c0d5548dd2023-02-13T06:27:11Zzhozhejiang electric powerZhejiang dianli1007-18812023-01-014219710210.19585/j.zjdl.2023010121007-1881（2023）01-0097-06Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbineZHANG Weiyong0ZHOU Shuai1CHEN Haixin2HE Shi3LIU Haoyuan4XU Decheng5LIU Yinli6Zhejiang Zheneng Zhenhai Power Generation Co., Ltd., Ningbo, Zhejiang 315100, ChinaSuzhou Nuclear Power Research Institute Co., Ltd., Suzhou, Jiangsu 215004, ChinaZhejiang Zheneng Zhenhai Power Generation Co., Ltd., Ningbo, Zhejiang 315100, ChinaZhejiang Zheneng Zhenhai Power Generation Co., Ltd., Ningbo, Zhejiang 315100, ChinaZhejiang Zheneng Zhenhai Power Generation Co., Ltd., Ningbo, Zhejiang 315100, ChinaSuzhou Nuclear Power Research Institute Co., Ltd., Suzhou, Jiangsu 215004, ChinaSuzhou Nuclear Power Research Institute Co., Ltd., Suzhou, Jiangsu 215004, ChinaDuring the operation of a thermal power unit’s high-pressure bypass （HPB） system， excessive vibration caused the breakage of the attached pressure-tapping tube. After the vibration reduction modification， it is required to analyze the vibration alternating stress level of the pressure-tapping tube and assess its safety. To this end， the vibration alternating stress level at the cracked location of the pressure-tapping tube is measured by the strain test method under the change of differential pressure and opening degree before and after the high-pressure bypass valve. The relationship between the vibration alternating stress magnitude of the pressure-tapping tube and the differential pressure before and after the high-pressure bypass valve and its opening degree is analyzed. The critical operating parameters for the potential fatigue fracture of the pressure-tapping pipelines are given： when the opening degree of the high-pressure bypass valve is 35%， and its differential pressure exceeds 3.70 MPa， the fatigue fracture of the pressure-tapping tube may occur. Finally， it is concluded through analysis that the high-pressure bypass vibration mainly comprises high-frequency vibration due to the high-frequency acoustic energy， which excites and amplifies the high-frequency vibration on the pipeline wall.https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=e2b24e9f-1515-43ff-b8cc-c71770467dcbhpb pipelinepressure-tapping pipelinevibrationalternating stress |
| spellingShingle | ZHANG Weiyong ZHOU Shuai CHEN Haixin HE Shi LIU Haoyuan XU Decheng LIU Yinli Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine Zhejiang dianli hpb pipeline pressure-tapping pipeline vibration alternating stress |
| title | Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine |
| title_full | Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine |
| title_fullStr | Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine |
| title_full_unstemmed | Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine |
| title_short | Study on vibration alternating stress of pressure tapping pipe of high-pressure bypass pipeline of the steam turbine |
| title_sort | study on vibration alternating stress of pressure tapping pipe of high pressure bypass pipeline of the steam turbine |
| topic | hpb pipeline pressure-tapping pipeline vibration alternating stress |
| url | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=e2b24e9f-1515-43ff-b8cc-c71770467dcb |
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