Technology Research for Rotor Wedge Installation of Hydrogenerator

Zhou Ruoyu

doi:doi:10.11648/j.ajwse.20210703.11

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Technology Research for Rotor Wedge Installation of Hydrogenerator

Zhou Ruoyu

Published in American Journal of Water Science and Engineering (Volume 7, Issue 3)

Received: 30 May 2021 Accepted: 17 June 2021 Published: 8 July 2021

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Abstract

When the rotor of the hydroelectric generator is running, the centrifugal force of the rotor rim is very high. Centrifugal force will produce obvious radial deformation on the rotor rim lamination, which will cause a radial separation gap between the rim and the rotor spider. The larger the diameter of the rotor, the larger the separation gap, therefore, when the rotor is assembled, each component is required to have sufficient strength, good balance and integrity. In order to ensure the stability and balance of the rim during the installation, it is necessary to focus on the technical measures to control installation of the wedges, to complete the thermal keying operations in strict accordance with the requirements. The purpose of the rotor thermal keying is to maintain the safety and stability during operation, to facilitate rim and rotor hub to be closely combined, and to achieve a reliable cooperation between them. A certain amount of mechanical compression is applied simultaneously between rim and rotor spider, which can generally be achieved by thermal keying or conventional rim hot keying on the basis of cold keying, the rim is heated to generate gap between rotor rim and hub, the keys are driven to the gap in specified depth. After the rotor rim is cooled down, the effective coordination between rotor rim and rotor hub can be ensured, the centripetal force generated during the operation of the unit can be offset to maintain the unit’s reliable operation. The installation of hydro-generator rotor’s wedge is an important process, it's a matter of the roundness and concentricity, higher requirements is needed for large capacity generators. Based on the structural characteristics of the rotor installed at the Ludila Power Station on the Jinsha River, this article introduces the installation and welding process of the wedges for the rotor at the Ludila Power Station, as well as the difference between thermal keying technology and conventional rim hot keying. Quality control, installing procedure and methods for installation of rotor wedge are described. This article could provide guidance and reference for the implementation of similar projects, research on new advanced technology for the industry.

Published in	American Journal of Water Science and Engineering (Volume 7, Issue 3)
DOI	10.11648/j.ajwse.20210703.11
Page(s)	97-102
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Hydrogenerator, Rotor Rim, Wedge, Installation Procedure, Ludila Hydropower Station, Thermal Keying

References

[1]	Edited by Harbin Institute of Electrical Engineering. Hydrogenerator design and calculation
[2]	Yang Guangyu, Zheng Kai, Tong Fan. (2020). Assembly of generator rotor support and quality control of welding deformation [J]. Yangtze River, v. 51 (S2): 255-259.
[3]	ZhangWeiyong, LiChangyun. (2019). Rotor assembly technology of hydro-generator unit of Dahuaqiao Hydropower Station [J]. Water Power, 045 (006): 104-107.
[4]	ZouWeihong, Hu Xiayu, Xu Liang. (2017). Discussion on the process of thermal keying for the rotor rim of a large hydroelectric generator [J]. Water Power, 043 (001): 90-93.
[5]	Yan Zhi. (2015). Research on the installation technology of the Wedge of the rotor of the hydro-generator unit [J]. Architectural Engineering Technology and Design, 000 (029): 1160, 1179.
[6]	Li Chengfeng. (2013). Assembling technology of generator rotor on the left bank of Xiluodu [J]. Applied Energy Technology, 000 (006): 43-46.
[7]	Gong Benchao. (2014). The application of rotor assembly technology in the installation of hydropower generating units [J]. Scientific and technological innovation, 75-75.
[8]	Wang Xiuran, Shi Daiyong. (2014). On-site assembly and welding technology of large generator rotor wedge [J]. Mechanical &Electrical Technology of Hydropower Station, 000 (006): 53-54.
[9]	Zhou Ruoyu, Fan Xiaokui, Sun Hongbing. (2015). Measuring device for the gap between the rotor rim and the lwedge of hydropower station, CN204240923U [P].
[10]	Chen Yuechun, Yao Gang.(2012). Research on the installation technology of the wedge of the rotor of the hydroelectric generator [J]. Guizhou Electric Power Technology, 45-47.
[11]	LvYuzhong, Li Chuanfa, Li Shunfeng. (2011). The characteristics and assembly of the generator rotor of Pubugou Hydropower Station [J]. Advances in science and technology of water resources, 31 (S2): 39-41.
[12]	WenYoufu.(2010). Rotor assembly technology of high-head hydro-generator set in Henan Baoquan [J], Yangtze River, 41 (012): 77-79.
[13]	Chen Xifang. (2008). Monitoring and maintenance of hydraulic turbine generator structure operation [M]. Beijing: China Water&Power Press.
[14]	Yu Bin. (2017). Discussion on Installation Technology of Wedge of Hydrogenerator Unit [J]. Science & Technology Vision, 000 (015): 37-38.
[15]	Mu Guanhua, Si Yonggang, (2006). Key control measures for rotor assembly of ALSTOM units in Three Gorges Left Bank Power Station [C]. The First International Conference on Hydropower Technology.

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APA Style

Zhou Ruoyu. (2021). Technology Research for Rotor Wedge Installation of Hydrogenerator. American Journal of Water Science and Engineering, 7(3), 97-102. https://doi.org/10.11648/j.ajwse.20210703.11

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ACS Style

Zhou Ruoyu. Technology Research for Rotor Wedge Installation of Hydrogenerator. Am. J. Water Sci. Eng. 2021, 7(3), 97-102. doi: 10.11648/j.ajwse.20210703.11

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AMA Style

Zhou Ruoyu. Technology Research for Rotor Wedge Installation of Hydrogenerator. Am J Water Sci Eng. 2021;7(3):97-102. doi: 10.11648/j.ajwse.20210703.11

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@article{10.11648/j.ajwse.20210703.11,
  author = {Zhou Ruoyu},
  title = {Technology Research for Rotor Wedge Installation of Hydrogenerator},
  journal = {American Journal of Water Science and Engineering},
  volume = {7},
  number = {3},
  pages = {97-102},
  doi = {10.11648/j.ajwse.20210703.11},
  url = {https://doi.org/10.11648/j.ajwse.20210703.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20210703.11},
  abstract = {When the rotor of the hydroelectric generator is running, the centrifugal force of the rotor rim is very high. Centrifugal force will produce obvious radial deformation on the rotor rim lamination, which will cause a radial separation gap between the rim and the rotor spider. The larger the diameter of the rotor, the larger the separation gap, therefore, when the rotor is assembled, each component is required to have sufficient strength, good balance and integrity. In order to ensure the stability and balance of the rim during the installation, it is necessary to focus on the technical measures to control installation of the wedges, to complete the thermal keying operations in strict accordance with the requirements. The purpose of the rotor thermal keying is to maintain the safety and stability during operation, to facilitate rim and rotor hub to be closely combined, and to achieve a reliable cooperation between them. A certain amount of mechanical compression is applied simultaneously between rim and rotor spider, which can generally be achieved by thermal keying or conventional rim hot keying on the basis of cold keying, the rim is heated to generate gap between rotor rim and hub, the keys are driven to the gap in specified depth. After the rotor rim is cooled down, the effective coordination between rotor rim and rotor hub can be ensured, the centripetal force generated during the operation of the unit can be offset to maintain the unit’s reliable operation. The installation of hydro-generator rotor’s wedge is an important process, it's a matter of the roundness and concentricity, higher requirements is needed for large capacity generators. Based on the structural characteristics of the rotor installed at the Ludila Power Station on the Jinsha River, this article introduces the installation and welding process of the wedges for the rotor at the Ludila Power Station, as well as the difference between thermal keying technology and conventional rim hot keying. Quality control, installing procedure and methods for installation of rotor wedge are described. This article could provide guidance and reference for the implementation of similar projects, research on new advanced technology for the industry.},
 year = {2021}
}

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TY  - JOUR
T1  - Technology Research for Rotor Wedge Installation of Hydrogenerator
AU  - Zhou Ruoyu
Y1  - 2021/07/08
PY  - 2021
N1  - https://doi.org/10.11648/j.ajwse.20210703.11
DO  - 10.11648/j.ajwse.20210703.11
T2  - American Journal of Water Science and Engineering
JF  - American Journal of Water Science and Engineering
JO  - American Journal of Water Science and Engineering
SP  - 97
EP  - 102
PB  - Science Publishing Group
SN  - 2575-1875
UR  - https://doi.org/10.11648/j.ajwse.20210703.11
AB  - When the rotor of the hydroelectric generator is running, the centrifugal force of the rotor rim is very high. Centrifugal force will produce obvious radial deformation on the rotor rim lamination, which will cause a radial separation gap between the rim and the rotor spider. The larger the diameter of the rotor, the larger the separation gap, therefore, when the rotor is assembled, each component is required to have sufficient strength, good balance and integrity. In order to ensure the stability and balance of the rim during the installation, it is necessary to focus on the technical measures to control installation of the wedges, to complete the thermal keying operations in strict accordance with the requirements. The purpose of the rotor thermal keying is to maintain the safety and stability during operation, to facilitate rim and rotor hub to be closely combined, and to achieve a reliable cooperation between them. A certain amount of mechanical compression is applied simultaneously between rim and rotor spider, which can generally be achieved by thermal keying or conventional rim hot keying on the basis of cold keying, the rim is heated to generate gap between rotor rim and hub, the keys are driven to the gap in specified depth. After the rotor rim is cooled down, the effective coordination between rotor rim and rotor hub can be ensured, the centripetal force generated during the operation of the unit can be offset to maintain the unit’s reliable operation. The installation of hydro-generator rotor’s wedge is an important process, it's a matter of the roundness and concentricity, higher requirements is needed for large capacity generators. Based on the structural characteristics of the rotor installed at the Ludila Power Station on the Jinsha River, this article introduces the installation and welding process of the wedges for the rotor at the Ludila Power Station, as well as the difference between thermal keying technology and conventional rim hot keying. Quality control, installing procedure and methods for installation of rotor wedge are described. This article could provide guidance and reference for the implementation of similar projects, research on new advanced technology for the industry.
VL  - 7
IS  - 3
ER  -

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Author Information

Zhou Ruoyu

Manufacturing and Installation Branch, Sinohydro Engineering Bureau 3 Co., Ltd., Xi’an, China

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Plain Text BibTeX RIS

APA Style

Zhou Ruoyu. (2021). Technology Research for Rotor Wedge Installation of Hydrogenerator. American Journal of Water Science and Engineering, 7(3), 97-102. https://doi.org/10.11648/j.ajwse.20210703.11

Copy | Download

ACS Style

Zhou Ruoyu. Technology Research for Rotor Wedge Installation of Hydrogenerator. Am. J. Water Sci. Eng. 2021, 7(3), 97-102. doi: 10.11648/j.ajwse.20210703.11

Copy | Download

AMA Style

Zhou Ruoyu. Technology Research for Rotor Wedge Installation of Hydrogenerator. Am J Water Sci Eng. 2021;7(3):97-102. doi: 10.11648/j.ajwse.20210703.11

Copy | Download

@article{10.11648/j.ajwse.20210703.11,
  author = {Zhou Ruoyu},
  title = {Technology Research for Rotor Wedge Installation of Hydrogenerator},
  journal = {American Journal of Water Science and Engineering},
  volume = {7},
  number = {3},
  pages = {97-102},
  doi = {10.11648/j.ajwse.20210703.11},
  url = {https://doi.org/10.11648/j.ajwse.20210703.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20210703.11},
  abstract = {When the rotor of the hydroelectric generator is running, the centrifugal force of the rotor rim is very high. Centrifugal force will produce obvious radial deformation on the rotor rim lamination, which will cause a radial separation gap between the rim and the rotor spider. The larger the diameter of the rotor, the larger the separation gap, therefore, when the rotor is assembled, each component is required to have sufficient strength, good balance and integrity. In order to ensure the stability and balance of the rim during the installation, it is necessary to focus on the technical measures to control installation of the wedges, to complete the thermal keying operations in strict accordance with the requirements. The purpose of the rotor thermal keying is to maintain the safety and stability during operation, to facilitate rim and rotor hub to be closely combined, and to achieve a reliable cooperation between them. A certain amount of mechanical compression is applied simultaneously between rim and rotor spider, which can generally be achieved by thermal keying or conventional rim hot keying on the basis of cold keying, the rim is heated to generate gap between rotor rim and hub, the keys are driven to the gap in specified depth. After the rotor rim is cooled down, the effective coordination between rotor rim and rotor hub can be ensured, the centripetal force generated during the operation of the unit can be offset to maintain the unit’s reliable operation. The installation of hydro-generator rotor’s wedge is an important process, it's a matter of the roundness and concentricity, higher requirements is needed for large capacity generators. Based on the structural characteristics of the rotor installed at the Ludila Power Station on the Jinsha River, this article introduces the installation and welding process of the wedges for the rotor at the Ludila Power Station, as well as the difference between thermal keying technology and conventional rim hot keying. Quality control, installing procedure and methods for installation of rotor wedge are described. This article could provide guidance and reference for the implementation of similar projects, research on new advanced technology for the industry.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Technology Research for Rotor Wedge Installation of Hydrogenerator
AU  - Zhou Ruoyu
Y1  - 2021/07/08
PY  - 2021
N1  - https://doi.org/10.11648/j.ajwse.20210703.11
DO  - 10.11648/j.ajwse.20210703.11
T2  - American Journal of Water Science and Engineering
JF  - American Journal of Water Science and Engineering
JO  - American Journal of Water Science and Engineering
SP  - 97
EP  - 102
PB  - Science Publishing Group
SN  - 2575-1875
UR  - https://doi.org/10.11648/j.ajwse.20210703.11
AB  - When the rotor of the hydroelectric generator is running, the centrifugal force of the rotor rim is very high. Centrifugal force will produce obvious radial deformation on the rotor rim lamination, which will cause a radial separation gap between the rim and the rotor spider. The larger the diameter of the rotor, the larger the separation gap, therefore, when the rotor is assembled, each component is required to have sufficient strength, good balance and integrity. In order to ensure the stability and balance of the rim during the installation, it is necessary to focus on the technical measures to control installation of the wedges, to complete the thermal keying operations in strict accordance with the requirements. The purpose of the rotor thermal keying is to maintain the safety and stability during operation, to facilitate rim and rotor hub to be closely combined, and to achieve a reliable cooperation between them. A certain amount of mechanical compression is applied simultaneously between rim and rotor spider, which can generally be achieved by thermal keying or conventional rim hot keying on the basis of cold keying, the rim is heated to generate gap between rotor rim and hub, the keys are driven to the gap in specified depth. After the rotor rim is cooled down, the effective coordination between rotor rim and rotor hub can be ensured, the centripetal force generated during the operation of the unit can be offset to maintain the unit’s reliable operation. The installation of hydro-generator rotor’s wedge is an important process, it's a matter of the roundness and concentricity, higher requirements is needed for large capacity generators. Based on the structural characteristics of the rotor installed at the Ludila Power Station on the Jinsha River, this article introduces the installation and welding process of the wedges for the rotor at the Ludila Power Station, as well as the difference between thermal keying technology and conventional rim hot keying. Quality control, installing procedure and methods for installation of rotor wedge are described. This article could provide guidance and reference for the implementation of similar projects, research on new advanced technology for the industry.
VL  - 7
IS  - 3
ER  -

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