Vibration characteristics of turbopump rotor-graphite seal system

被引：0
|
作者：
Zhang N. [1 ,2 ]
Qian D. [3 ]
Liu Z. [3 ]
Dou W. [2 ]
Jiang X. [1 ]
机构：
[1] School of Astronautics, Harbin Institute of Technology
[2] Beijing Aerospace Propulsion Institute
[3] School of Energy Science and Engineering, Harbin Institute of Technology
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2010年 / 40卷 / 03期
关键词：
Graphite contact seal; Lateral-torsional coupling; Liquid rocket engine turbopump; Vibration characteristics;
D O I：
10.3969/j.issn.1001-0505.2010.03.015
中图分类号：
学科分类号：
摘要：
To study the contact friction problem of a turbopump rotor-graphite contact seal system in liquid rocket engines, a lateral-torsional coupling dynamic equation of a rotor-graphite seal system is established. The vibration resonance under unbalanced excitation is obtained by using the Runge-Kutta method and the influence of the pressing force on the rotor resonance is also studied. The frequency analysis results show that under graphite seal excitation, the rotor-graphite seal system with small unbalance exhibits obvious characteristics of lateral-torsional coupling vibration such as combination resonance and zero frequency vibration. With the increase in the pressing force, continuous spectra and zero frequency vibrations emerge in the frequency spectrum graph, and combination resonance exists in the whole frequency domain. The increases in the rotating speed and that of the pressing force can lead to low frequency vibration. The research results prove that the graphite contact seal can enhance the coupling effects of lateral and torsional vibration and may lead to instability.
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页码：512 / 516
页数：4
相关论文
共 10 条
  • [1] Zhang W., Wu C., Huang X., Fault mechanism analysis and standard pattern establishing for turbo-pump system, Machine Tool & Hydraulics, 15, 6, pp. 224-228, (2002)
  • [2] pp. 91-100, (1996)
  • [3] Ding Q., Lateral vibration of a rotor/bearing system with axial rubs, Journal of Mechanical Strength, 26, 2, pp. 132-137, (2004)
  • [4] Zhang G., Ding Q., Chen Y., Vibration analysis of a two-disc shaft with axial rubs, Journal of Mechanical Strength, 31, 5, pp. 712-715, (2009)
  • [5] Zhang K., Ding Q., Vibration analysis of a two-disc rotor-stator system with axial rubs, China Mechanical Engineering, 20, 21, pp. 2526-2530, (2009)
  • [6] Yuan Z., Li Z., Wang S., Et al., Dynamic analysis in full degrees of freedom of rotor's axial rub-impact with consideration of nonlinear fluid-structure interaction forces, Proceeding of Chinese Society for Electrical Engnieering, 28, 14, pp. 92-96, (2008)
  • [7] Yuan Z.W., Chu F.L., Hao R.J., Simulation of rotor's axial rub-impacts in full degrees of freedom, Mechanism and Machine Theory, 42, 7, pp. 763-775, (2007)
  • [8] Ouyang H., Mottershead J.E., Friction-induced parametric resonances in disks: effect of a negative friction-velocity relationship, Journal of Sound and Vibration, 209, 2, pp. 251-264, (1998)
  • [9] (1993)
  • [10] (2001)
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