Investigation reveals that geometric eccentricity strongly impacts stability in compliant foil gas seal-rotor systems, suggesting deeper understanding of dynamics is needed.
An investigation into high-speed rotating machinery dynamic research, the analysis of dynamic characteristics and instability mechanism in seal-rotor systems constitutes fundamental research. Current research on compliant foil gas seal (CFGS) primarily focuses on numerical simulations and experimental analyses, while limited exploration of the integrated dynamics of compliant foil gas seal-rotor system, especially in the coupled interactions among bearing, CFGS and rotor. To gain deeper understanding of the dynamic behavior of high-speed compliant foil gas seal-rotor system, this research employs the Newmark method to analyse and solve the dynamics of the seal-rotor system. The research explores the influence of rotational speed, geometric eccentricity, and mass imbalance on the rotor perturbation trajectories and amplitude responses. The results reveal that geometric eccentricity has a significantly stronger influence on the stability of seal-rotor system with mass imbalance and phase angle.
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Wang et al. (2025) studied this question.
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