Welcome to Journal of Beijing Institute of Technology
Volume 28Issue 3
.
Turn off MathJax
Article Contents
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. doi: 10.15918/j.jbit1004-0579.18074
Citation: 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.doi:10.15918/j.jbit1004-0579.18074

Dynamic Shafting Alignment Algorithms Considering Sensitivity Analysis and Its Application

doi:10.15918/j.jbit1004-0579.18074
  • Received Date:2018-07-16
  • 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.
  • loading
  • [1]
    Patel T H, Darpe A K. Experimental investigations on vibration response of misaligned rotors[J]. Mechanical Systems & Signal Processing, 2009, 23(7):2236-2252.
    [2]
    Chandra N H, Sekhar A S. Detection and monitoring of shaft misalignment in rotors using Hilbert Huang Transform[C]//ASME Turbo Expo 2014:Turbine Technical Conference and Exposition, New York, USA, 2014.
    [3]
    Chen Q, Yuan Q, Lei M, et al. Shafting alignment computing method of new multibearing rotor system under specific installation requirement[J]. Mathematical Problems in Engineering,2016(3):1-12.
    [4]
    Sekhar A S, Prabhu B S. Effects of coupling misalignment on vibrations of rotating machinery[J]. Journal of Sound & Vibration, 1995, 185(185):655-671.
    [5]
    Tsai C Y, Huang S C. Transfer matrix for rotor coupler with parallel misalignment[J]. Journal of Mechanical Science & Technology, 2009, 23(5):1383-1395.
    [6]
    Zhou R P, Zhang S P, Yang J G. Application of improved three-moment equation in dynamic alignment of ship shafting[J]. Ship Engineering, 2003, 25(1):40-43. (in Chinese)
    [7]
    He A P, Ge Q, Li D H. Advanced design for shaft system of large turbine[J]. Journal of Vibration Engineering. 2004, 17(zl):231-233. (in Chinese)
    [8]
    Li W F, Jiang J, Sun Q. Research on shafting's static characteristic analysis method of large steam turbine-generator[J]. Electric Power, 2017, 50(2):52-56. (in Chinese)
    [9]
    ABS. Shaft alignment analysis training notes[M]. New York:American Bureau of Shiping, 2002:35-100.
    [10]
    Zhang S D, Yang J G, Zhu X B, et al. Experimental study of shafting load distribution based on strain and transfer matrix method[J]. Journal of Chinese Society of Power Engineering, 2012, 32(7):513-516. (in Chinese)
    [11]
    Gao Q S. Zhang C, Deng X W, et al. Method to calculate turbine generator unit bearing load distribution using journal raising rate[J]. Journal of Mechanical Engineering, 2013, 49(11):84-88. (in Chinese)
    [12]
    Yang J G, Zhou S X, Huang B H, et al. Calculation and analysis of bearing load sensitivity for multisupport turbo-generator units[C]//Proceedings of the CSEE, Xi'an, China, 2000. (in Chinese)
    [13]
    Tian Y W, Yang J G. Calculation and analysis of the bearing load sensitivity of a 1000 MW turbo-generator unit[J]. Journal of Engineering for Thermal Energy & Power, 2008, 23(5):459-461. (in Chinese)
    [14]
    Murawski L. Shaft line alignment analysis taking ship construction flexibility and deformations into consideration[J]. Marine Structures, 2005, 18(1):62-84.
    [15]
    Schiffer W. Advanced methods for static and dynamic shafting calculations[J]. Brodogradnja, 2007, 58(2):115-122.
    [16]
    Xie F. Calculation of oil film pressure distribution of journal bearing based on finite difference method[J]. Lubrication Engineering, 2012, 37(2):12-15. (in Chinese)
    [17]
    Zhou R P, Li B R, Li Z G. The analysis of the influence oil-film on the propulsion shafting alignment of vessels[J]. Ship & Ocean Engineering, 2005(4):64-67. (in Chinese)
    [18]
    Chen Q, Yuan Q, Ge Q, et al. Research on algorithms for new type of shaft structures under specific alignment requirements[C]//Proceedings of CSPE Turbine Academic Symposium, Wuhan, China, 2015. (in Chinese)
  • 加载中

Catalog

    通讯作者:陈斌, bchen63@163.com
    • 1.

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (482) PDF downloads(291) Cited by()
    Proportional views
    Related

    /

      Return
      Return
        Baidu
        map