Effect of shaft eccentricity on dynamic characteristics for different geometries of stationary labyrinth seals

Saber, Esmail M.; Abdou, Khaled M.; Afify, Rola

doi:10.1016/j.aej.2019.12.008

Cited by 7 publications

(1 citation statement)

References 10 publications

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“…Subsequent studies have introduced various methods and models for calculating labyrinth seals' dynamic characteristic coefficients [13][14][15]. Saber et al [16] carried out a theoretical study to investigate the effect of transverse asymmetry of the shaft on the dynamic characteristics of labyrinth seals for different geometries. Zhang et al [17,18] proposed a new hole-diaphragm-labyrinth seal (HDLS) structure constructed by adding a single hole to the diaphragm from a conventional diaphragm-labyrinth seal (DLS) by introducing an additional damping source.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Static and Dynamic Characteristics of a Novel Staggered Labyrinth Seal with Semi-Elliptical Structure

Yan,

Ye,

Wang

et al. 2024

Lubricants

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In order to optimize sealing performance, a novel labyrinth seal with semi-elliptical teeth (SET) structure is proposed in this paper, which includes semi-elliptical teeth and a series of cavities. The simulation results calculated by the numerical methods are compared with the experimental and theoretical results, and static and dynamic characteristics of the novel SET structure are further investigated. The numerical simulations of labyrinth seals with the SET structure demonstrate high accuracy and reliability, with a maximum relative error of less than 6% as compared to experimental results, underscoring the validity of the model. Notably, leakage rates are directly influenced by pressure drop and axial offset, with optimal sealing achieved at zero axial displacement. The direct damping coefficient increases as the pressure drop increases while the other dynamic coefficients decrease. Additionally, the stability results show that the novel SET structure exhibits higher stability for positive axial offsets. The novel model and corresponding results can provide a meaningful reference for the study of sealing structure and coupled vibration in the field of fluid machinery.

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