Effect of Radial Growth on Rotordynamic Characteristics of Labyrinth Seal-Rotor System

Zhang, Enjie; Jiao, Yu; Chen, Zhaobo

doi:10.1061/(asce)as.1943-5525.0001010

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…In recent years, there are an increasing number of scholars who pay attention to the nonlinear vibration of the seal-bearingrotor system because of its strong nonlinear characteristics, including oil-film instability and other coupling faults, such as the airflow-induced vibration [21][22][23][24][25][26][27][28][29][30][31][32]. For example, Wang et al [21] studied the effect of the real high-pressure methane gas properties on the nonlinear behavior of the seal-rotor system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Lin

Zhao

Wang

et al. 2021

Shock and Vibration

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In this paper, a pedestal looseness fault model of a rotor-bearing-seal system is established. Under two working conditions of the same direction eccentricity (Working Condition 1) and reverse eccentricity (Working Condition 2), rotor orbits, vibration waveforms, spectrum cascade, and Poincaré maps are used to study the dynamic characteristics of the system when the sliding bearing support is loosened. The influence of speed, the unbalance of two discs, the looseness clearance, and the mass of bearing support on system characteristics are analyzed. The study found that Working Condition 2 is more likely to cause looseness of the bearing support. Moreover, for the rotor system in this paper, the pedestal looseness fault is more likely to occur near the second-order critical speed. Through analysis of the spectrum, it is found that the spectrum of the looseness fault will show multiple frequencies or continuous spectra, and the rotor orbits will appear “cylindrical.”

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Section: Introductionmentioning

confidence: 99%

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Lin

Zhao

Wang

et al. 2021

Shock and Vibration

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Spiral flow induced destabilizing force analysis and its reduction with a novel helix-comb gas seal

Zhang

Yang

2020

Aerospace Science and Technology

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Dynamic Analysis of Rotor-Seal System Considering the Radial Growth Effect of the Seal

Shet

Sekhar

Prasad

2020

J. Phys.: Conf. Ser.

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Effect of the increase in operating speed, temperature and pressure ratio on turbomachine components must be studied and understood seriously. One of the major challenges is to choose a right initial clearance for seals considering the seal growth as it may affect rotor system dynamic characteristics and leakage performance. In the present study the dynamic response of the rotor system has been calculated considering the seal growth effect at each operating speed. It is been analyzed by the response plots and the orbital plots. The results show that the dynamic response of the system is influenced by radial growth of seal at lower pressure ratio and higher rotational speed. At higher pressure ratio the radial growth of seal has insignificant effect on rotor stability. In addition to these, the present study also emphasizes on the effect of the seal on the overall rotor system by comparing two different rotor-seal system.

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Effect of Radial Growth on Rotordynamic Characteristics of Labyrinth Seal-Rotor System

Cited by 5 publications

References 47 publications

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Spiral flow induced destabilizing force analysis and its reduction with a novel helix-comb gas seal

Dynamic Analysis of Rotor-Seal System Considering the Radial Growth Effect of the Seal

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