Analyses of both steady behavior and dynamic tracking of non-contacting spiral-grooved gas face seals

Lee, Shun Ching; Xiulin, Zheng

doi:10.1016/j.compfluid.2013.09.024

Cited by 19 publications

(4 citation statements)

References 10 publications

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“…With the in-depth development of the theoretical research on the gas film sealing technology and the need for innovation in the sealing principle and structure, the research on seal testing and evaluation technology based on advanced and composite sensing technology is equally important [197]. The continuous updating of sensors and the increasing accuracy of transmitters, coupled with the rapid development of Computer Assistant Test (CAT) technology, have led to the maturation of the gas seal test and testing technology [198][199][200][201]. Domestic and foreign researchers have conducted a large number of experimental studies on different types of cylindrical gas film seals, the aforementioned seal stability and dynamic characteristics, structural deformation, and other content have been studied most by scholars through tests to verify the accuracy of the theoretical calculation model, and will not be repeated here, as this part has a main focus on the sealing structure of the test of the technical means used in the sealing ring groove type machining process for elaboration.…”

Section: Research On the Test And Processing Technology Of Cylindrica...mentioning

confidence: 99%

Research Status and Development Trend of Cylindrical Gas Film Seals for Aeroengines

Jiang,

Yu,

Wang

et al. 2023

Processes

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High-performance aeroengine design is an important component of modern industry, and advanced sealing technology is a key technology to meet the engine fuel consumption rate, thrust-to-weight ratio, pollutant emission, durability, and lifetime. Reducing the internal airflow leakage of the engine through a sealing technology can improve the performance and efficiency of the engine. In this paper, the typical sealing technology for an aeroengine is introduced in more detail, including the structural characteristics and use limitations of the labyrinth seal, brush seal, honeycomb seal, gas film face seal, and cylindrical gas film seal. It focuses on the development history, typical structure type, working principle, basic technology research method, steady-state performance, dynamic characteristics, multi-physical field coupling, structural deformation, experimental testing, processing technology. Finally, it summarizes the problems and future development trends of the current application of the cylindrical gas film seal in aeroengines, and points out that the seal performance test and evaluation based on advanced composite sensor technology and the innovative design of the seal based on new material, a new principle, and a new structure will be the new research direction.

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Section: Research On the Test And Processing Technology Of Cylindrica...mentioning

confidence: 99%

Research Status and Development Trend of Cylindrical Gas Film Seals for Aeroengines

Jiang,

Yu,

Wang

et al. 2023

Processes

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“…To reduce computation time and increase accuracy in solving dynamic problems, Miller and Green proposed the step jump method and the direct numerical frequency response method [21]. The accuracy of the dynamic performances determination of the fluid film in the seal gap can also be improved by taking into account the deformation influence of the seal ring faces, and by considering the problem of fluid flow in the seal gap using transient analysis [22,23]. Especially important is thermal deformation, since the deformation of the sealing ring is mainly caused by the influence of temperature [24].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Models of Mechanical Seals for Turbomachinery Application

Badykov,

Falaleev,

Benedyuk

et al. 2024

Preprint

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One of the primary causes of the mechanical seal failure is rotor vibration. Traditional dynamic seal models often would not be able to fully explaining the failure mechanisms. The seal dynamic models proposed in this paper, including those developed by the authors, prove valuable in predicting seal dynamics during operation in specific turbomachinery and in explaining the causes of seal failure. The single-mass dynamic model is suitable for analyzing contact mechanical seal and simple design dry gas seals dynamics. The two-mass dynamic model is used for investigating operational dynamics processes in classical dry gas seals under complex loading conditions. The three-mass dynamic model is used to study various complex mechanical seal types. This model is able to determine the normal operating condition range and to explain leakage mechanisms in the presence of excessive rotor vibrations.

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“…Ruan (2002) applied the perturbation method to the unsteady and nonlinear Reynolds equation and obtained the stiffness and damping coefficients of the non-contacting dry gas seal. Lee and Zheng (2013) used the finite element method to analyze the steady- and unsteady-state behavior of the spiral groove gas end face seal. Falaleev and Vinogradov (2015) proposed a two-mass dynamic model suitable for dry gas seal in actual work and realized the theoretical and experimental analysis of the dynamic conditions of the sealing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dynamic characteristics of spiral groove liquid film seal under thermal–fluid–solid coupling

Hao

Xinhui

et al. 2021

ILT

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Purpose The purpose of this paper is to investigate the dynamic characteristics of spiral groove liquid film seal under the effect of thermal–fluid–solid coupling. Design/methodology/approach The dynamic analysis model of spiral groove liquid film seal under the effect of thermal–fluid–solid coupling was established by perturbation method. The steady-state and perturbation Reynolds equations were solved, and the steady-state sealing performance and dynamic characteristic coefficients of the liquid film were obtained. Findings Compared with the liquid film without coupling method, a divergent seal gap is formed between the seal rings under the effect of thermal–fluid–solid coupling, the minimum liquid film thickness decreases, the dynamic stiffness and damping coefficients of the liquid film are increased and the thermoelastic deformation of the end-face improves the dynamic performance of the liquid film seal. Originality/value The dynamic characteristics of the spiral groove liquid film seal under the effect of thermal–fluid–solid coupling are studied, which provides a theoretical reference for optimizing the dynamic performance of the non-contacting liquid film seal.

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Analyses of both steady behavior and dynamic tracking of non-contacting spiral-grooved gas face seals

Cited by 19 publications

References 10 publications

Research Status and Development Trend of Cylindrical Gas Film Seals for Aeroengines

Research Status and Development Trend of Cylindrical Gas Film Seals for Aeroengines

Dynamic Models of Mechanical Seals for Turbomachinery Application

Analysis of dynamic characteristics of spiral groove liquid film seal under thermal–fluid–solid coupling

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