Study on Dynamic Response of Assembly Type Gear-Rotor System

Abstract:

The dynamic model of a rotor system of assembled compressor is established. Based on the single axis analysis, and considering the tilting-pad bearing stiffness characteristics with speed variations, the paper analyses whole system’s nature characteristic with gearing mesh factors. It mainly expands with the form of amplitude-frequency drawing and spectrum charts, and examines the dynamic response with each key position of coupled systems under the two working conditions. The results show that, because of the existence of gear meshing effect, Low speed axis and high-speed axis in the corresponding speed shaft appeared a few larger vibration amplitudes, at high speed axis add unbalance force, can arouse resonance of this axis in the first two order critical speed, but in the other axis don’t have obvious display.

• Periodical: Advanced Engineering Forum (Volumes 2-3)
• Pages: 912-917
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.2-3.912
• Online since: December 2011
• Authors: Ji Shuang Dai, Peng Zhang, Chao Feng Li, Bo Wang, Bang Chun Wen
• Keywords: Assembled, Compressor, Dynamic Response, Gear, Rotor System

References

[1] Kubur, M, Kahraman, A, Zini, D. M. and Kienzle, K. (2004): Dynamic Analysis of a Multi-Shaft Helical Gear Transmission by Finite Elements: Model and Experiment, ASME J. Vibr. Acoust, 126, pp.398-406.

DOI: 10.1115/1.1760561

[2] NICHOLAS J C , GUNTER E J, ALLAIRE P E. Stiffness and damping coefficients for the five-pad tilting-pad bearing, ASLE, 1979, 22(2): 113-124.

DOI: 10.1080/05698197908982907

[3] Lee A S, Kima B O, Kimb Y C. A finite element transient response analysis method of a rotor- bearing system to base shock excitations using the state-space newmark scheme and comparisons with experiments. Journal of Sound and Vibration, 2006, 297(3-5): 595–615.

DOI: 10.1016/j.jsv.2006.04.028

[4] Li G Y, Qin D T. Dynamics analysis of gas turbine gear coupling rotor system. China Mechanical Engineering, 2010, 21(14): 1655-1660.

[5] Qin D T, Qian E, Shi W K. Dynamics Characteristics of gas turbine gear coupling rotor system. Journal of Chongqing University, 2010, 33(1): 19-24.

[6] Pang H, Fang Z D, Ou W L. Vibration Characteristic Analysis of multiple parallel gear coupling rotor system. Vibration and Shock, 2007, 26(6): 21-25.

[7] Li M, Yu L, Analysis of the coupled lateral torsional vibration of a rotor-bearing system with a misaligned gear coupling. Journal of Sound and vibration, 2001, 243(2): 283-300.

DOI: 10.1006/jsvi.2000.3412

[8] Zhang S H, Shi S H, Qiu D M. A Nonlinear Model for Dynamic Analysis of a Geared Rotor-Bearing System. Mechanical Science and Technology, 2001, 20(2): 191-193.