Evaluation Analysis on Leakage Performance for Beam Seal With Two Sealing Areas

Yu, Yingjia; Cui, Ying; ZHANG, Hongxiang; WANG, Dawei; Zhong, Jingjun

doi:10.1109/access.2022.3158485

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…21 To investigate the real contact area and the elastoplastic deformation of the contact with rough surfaces the microscopic finite element model (FEM) was utilized by Hyun et al 22 and Yong et al 23,24 In order to quantify the sealing performance based on the contact state, Yu et al 25,26 examined the microleakage channel inside the mechanical seal interfaces. Cui et al 27,28 developed a porous media leaking model to investigate the effect of microscopic surface topography on sealing performance. Although current methods are adequate for solving microscopic sealing problems, they can hardly take into account the multiscale factors included in the real sealing problem, acting as the boundary condition of the microscopic model.…”

Section: Introductionmentioning

confidence: 99%

A novel FE model for the sealing performance of aviation flare joints with multiscale factors of manufacturing and assembly

Deng,

Luo,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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The interfacial contact status of a joint determines the sealing performance of an aircraft hydraulic system, which is influenced by inevitable multiscale assembly errors and joint manufacturing deviations. To address these challenges, a novel geometric analysis model was heuristically created that incorporates assembly and manufacturing-related topographies to accurately estimate the initial relative assembly position of joint surfaces. A microscopic contact model was constructed using the reverse reconstruction approach based on measured surface characteristics. Combining the relative position, a multiscale finite element contact model was generated to investigate the impact of each scale topography on the contact state of the seal ring. The experimental data verified the simulated indentation findings, confirming the model's efficacy in estimating contact status and seal performance characteristics. It is found that the flare angle has a more obvious effect on the contact state of the sealing interface, and a 2° difference in angle under the same load can cause a 28.19% difference in contact area, which greatly affects the sealing performance.

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Section: Introductionmentioning

confidence: 99%

A novel FE model for the sealing performance of aviation flare joints with multiscale factors of manufacturing and assembly

Deng,

Luo,

Zhang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Once the leakage of the hydraulic system, it will cause the instability of the aircraft's flight attitude, and even affect the control performance of the engine, wing, tail and other key parts, and then cause irreversible losses. Aviation hydraulic pipe joint is the hydraulic pump, valve, cylinder and other hydraulic components through the pipeline together to form a hydraulic system of basic hydraulic accessories [2]. As one of the leakage forms of hydraulic systems with important research significance, pipe joint seam leakage has important research value.…”

Section: Introductionmentioning

confidence: 99%

“…Ni et al [8] reconstructed the real seal contact interface obtained by experiments, and based on the fractal theory of porous media, established a theoretical model for calculating the leakage rate of dynamic and static ring contact mechanical seals that could consider the real seal contact interface, and gave the calculation method of interface characteristic parameters. Yu et al [2] based on the established three-dimensional seepage mesh model and porous media theory, used the finite element method to numerically simulate the average contact pressure and true contact width of the beam seal. The accuracy of the numerical results is verified by the experimental study of beam seal.…”

Section: Introductionmentioning

confidence: 99%

Semi-physical Simulation Model for Leakage of Prediction Aviation Pipeline

Luo

Deng

2023

J. Phys.: Conf. Ser.

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The high stability and tightness of modern aviation hydraulic pipelines require them to have a very low leakage rate under variable pressure environments. Once the leakage of the hydraulic pipeline is likely to cause an irreversible air disaster. Flaring straight pipe joint is one of the most widely used in aircraft hydraulic pipelines. The establishment of the simulation model is an effective method to accurately predict the annular gap leakage of the pipe joint. The ring gap of the pipe joint is located inside the threaded sleeve, which cannot be directly observed. The existing leakage prediction methods usually only focus on the microscopic interface contact and ignore the leakage prediction of real complex structures. Therefore, this article is based on ideas, semi-physical simulation through experimental data calibration tightening torque and annular gap width and the mathematical relationship between void ratio, and then established the flaring type straight pipe joint circular aperture leakage prediction simulation model, the ability to different tightening torque and hydraulic pressure conditions for predicting the pipe joint leakage rate, finally, the simulation experiments have been carried out to verify prediction model, The validity of this method is proved.

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“…Next, in regard to the leakage rate, Yu et al [21,22] investigated the leakage channel within the mechanical seal interface to calculate the leakage rate. Cui et al [23,24] proposed a porous medium leakage model to explore the in uence of microscopic surface topography on sealing performance. Multiscale models were created when researchers discovered that microscopic models were unable to accurately predict the leakage rate in a multiscale environment when applied to practical problems with multiscale factors due to the in uence of mesoscopic and macroscopic factors [25,26].…”

Section: Introductionmentioning

confidence: 99%

A novel finite element model for the flare joint contact status at the seal ring with multiscale factors during assembly

Deng

Luo

Zhang

et al. 2023

Preprint

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The sealing performance of a hydraulic system is determined by the joint’s interfacial contact status, which is impacted by unavoidable assembly errors and joint manufacturing deviations on multiple scales. A novel geometric analysis model was heuristically developed for incorporating the macroscopic and mesoscopic topographies into the accurate estimation of the contact surfaces' initial relative assembly position. The microscopic contact model is subsequently constructed using the reverse reconstruction method based on the measured characteristics of rough surfaces. In conjunction with the relative contact position, a multiscale finite element contact model of the interface in the assembly was generated. The simulated indentation results are then compared to experimental data for selected typical circumferential angles, while the impact of topography at each scale is investigated. The findings show the variation in the seal formation tendencies and illustrate how effectively the model can predict the contact status at the seal ring. The influence of the macroscopic mating angle is mostly apparent in the distribution of plastic deformation along the circumferential direction. The mesoscopic flare angle is mostly reflected in the width and depth of the interfacial depression, and the radial circular runout impacts the seal ring formation process by altering the contact phase.

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Evaluation Analysis on Leakage Performance for Beam Seal With Two Sealing Areas

Cited by 3 publications

References 15 publications

A novel FE model for the sealing performance of aviation flare joints with multiscale factors of manufacturing and assembly

A novel FE model for the sealing performance of aviation flare joints with multiscale factors of manufacturing and assembly

Semi-physical Simulation Model for Leakage of Prediction Aviation Pipeline

A novel finite element model for the flare joint contact status at the seal ring with multiscale factors during assembly

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