Transient investigations of teeth on rotor and teeth on stator modified labyrinth seals

Zhang, Xiang; Jiao, Yinghou; Du, Huzhi; Huo, Guanghe; Xu, Yeyin; Che, Renwei

doi:10.1016/j.triboint.2024.109296

Cited by 1 publication

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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. Sun et al [19] analyzed how the dynamic characteristics of a sealed rotor were affected by shunt injection and an improved impedance method based on unbalanced synchronous excitation was proposed.…”

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

View full text Add to dashboard Cite

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.

show abstract