| Dynamic Shafting Alignment Algorithms Considering Sensitivity Analysis and Its Application |
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| 作者姓名： | Chao Wang Luyi Lu Kun Wang Jianlan Li |
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| 作者单位： | School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China,School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China,School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China,School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (51506072); the National Science and Technology Major Project (2012ZX06002-017-01-04-02) |
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| 摘 要： | A method for dynamic alignment calculation of a large turbogenerator shafting is proposed. The method can analyze bearing load and bearing load sensitivity. Shafting alignment is made up of two parts:static alignment and dynamic alignment. Static alignment forms the basis of dynamic alignment, its mathematical model is deduced by transfer matrix method, the shafting static characteristic parameters under specific alignment installation requirements were obtained afterwards. Based on superposition method, bearing sensitivity analysis is performed to find the impact of slight bearing elevation change of the static alignment result. Above static alignment, dynamic shafting alignment considers the internal geometry of bearing under rotating state, static Reynolds equation is solved by the finite difference method and the relative position relationship of the center of journal and bearing are obtained. For static characteristic parameters calculated by static alignment and bearing sensitivity analysis, the calculation accuracy is verified by finite element software. The alignment model and codes in this paper can be a tool for the installation and safety analysis of large-scale shafting with three-point or four-point supports.
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| 关 键 词： | alignment sensitivity analysis transfer matrix method superposition method finite difference method |
| 收稿时间： | 2018/7/16 0:00:00 |
Dynamic Shafting Alignment Algorithms Considering Sensitivity Analysis and Its Application |
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| Chao Wang,Luyi Lu,Kun Wang,Jianlan Li.Dynamic Shafting Alignment Algorithms Considering Sensitivity Analysis and Its Application[J].Journal of Beijing Institute of Technology,2019,28(3):617-625. |
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| Authors: | Chao Wang Luyi Lu Kun Wang and Jianlan Li |
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| Affiliation: | School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China,School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China,School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China and School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China |
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| Abstract: | A method for dynamic alignment calculation of a large turbogenerator shafting is proposed. The method can analyze bearing load and bearing load sensitivity. Shafting alignment is made up of two parts:static alignment and dynamic alignment. Static alignment forms the basis of dynamic alignment, its mathematical model is deduced by transfer matrix method, the shafting static characteristic parameters under specific alignment installation requirements were obtained afterwards. Based on superposition method, bearing sensitivity analysis is performed to find the impact of slight bearing elevation change of the static alignment result. Above static alignment, dynamic shafting alignment considers the internal geometry of bearing under rotating state, static Reynolds equation is solved by the finite difference method and the relative position relationship of the center of journal and bearing are obtained. For static characteristic parameters calculated by static alignment and bearing sensitivity analysis, the calculation accuracy is verified by finite element software. The alignment model and codes in this paper can be a tool for the installation and safety analysis of large-scale shafting with three-point or four-point supports. |
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| Keywords: | alignment sensitivity analysis transfer matrix method superposition method finite difference method |
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