Fluid flow regime transition in water lubricated spiral grooved face seals

Brunetière, Noël; Rouillon, Mathieu

doi:10.1016/j.triboint.2020.106605

Cited by 19 publications

(8 citation statements)

References 28 publications

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“…Over the past decades, published works have shown that geometric grooves with upstream pumping capabilities were feasible for achieving a zero-leakage design of the sealed medium [8][9][10][11][12][13][14]. In 1984, Etsion [8] pointed out that the effective design of grooves on the sealing surface might contribute to achieving zero leakage.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Hydrodynamic Lubricating Behaviors of Upstream Liquid Face Seals with Ellipse Dimples

Bai

Yang

et al. 2023

Materials

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In order to obtain the leakage characteristics of an upstream pumping face seal with inclined ellipse dimples under high-temperature and high-speed liquid lubricating conditions, a thermo-hydrodynamic lubricating model is developed. The novelty of this model is that it takes the thermo-viscosity effect and cavitation effect into account. The influence of operating parameters, such as rotational speed, seal clearance, seal pressure, ambient temperature and structural parameters, such as dimple depth, inclination angle, slender ratio and dimple number on the opening force and leakage rate, is numerically calculated. The results obtained show that the thermo-viscosity effect makes the cavitation intensity decrease noticeably, leading to an increase in the upstream pumping effect of ellipse dimples. Moreover, the thermo-viscosity effect may make both the upstream pumping leakage rate and opening force increase by about 10%. It can also be found that the inclined ellipse dimples can produce an obvious upstream pumping effect and hydrodynamic effect. Based on the reasonable design of the dimple parameter, not only can the sealed medium achieve zero leakage, but the opening force can also increase by more than 50%. The proposed model has the potential to provide the theoretical basis for and guide the future designs of upstreaming liquid face seals.

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Section: Introductionmentioning

confidence: 99%

Thermo-Hydrodynamic Lubricating Behaviors of Upstream Liquid Face Seals with Ellipse Dimples

Bai

Yang

et al. 2023

Materials

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“…This type of non-contact mechanical seal includes a complete fluid film between the rotating ring and the stationary ring end faces during the operation, avoiding the wear caused by the hard solid-phase contact and achieving a controllable leakage rate, thus drawing people's attention [4]. In recent years, researchers focused mainly on the optimization of surface parameters and sealing performance [5][6][7], the simulation of flow fields between seal end faces [8,9], and fluid-structure interaction and thermal-mechanical coupling effects [10]. However, to maintain the sealing interface fluid film stability, it is often necessary to build a matching auxiliary flushing system for both the dry gas seals and upstream pumping mechanical seals [11], which increases the initial investment and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of the Self-Pumping Hydrodynamic Mechanical Seal with a Conical Convergent Diffuser Groove

Sun

et al. 2022

Coatings

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Requirements such as high opening force, low leakage rate, and design without matching auxiliary flushing systems are expected of the modern fluid machinery shaft seals used in the process industry. A self-pumping hydrodynamic mechanical seal with a conical convergent diffuser groove is proposed and its sealing performance is studied by numerical simulation in this paper. Further, its sealing performance is compared to that of a flat-bottomed equal cross-sectional diffuser groove and the results have shown that the proposed seal has more superior sealing performance. The influence of structural and operating parameters on the sealing performance of the proposed seal is discussed and its working mechanism is explained. The results have shown that when the structural parameters of the spiral groove and the operating parameters are the same, the proposed design has a similar leakage rate and a higher opening force. The conical convergent diffuser groove has better wrapping properties, whereas the fluid energy is utilized more efficiently, improving the sealing interface opening force. The taper degree variation causes a slight change to the pressure at the root of the spiral groove, causing slight fluctuations in the seal leakage rate. The research results broaden the design of non-contact mechanical seals and provide a theoretical basis for the engineering application of the proposed self-pumping hydrodynamic mechanical seal with a conical convergent diffuser groove.

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“…Therefore, the effect of thermal–fluid–solid coupling on the liquid film and sealing performance cannot be ignored. Brunetiere and Rouillon (2021) studied the critical Reynolds numbers corresponding to the fluid flow regime transition of water-lubricated spiral groove seal for thermo-mechanical fluid–solid coupling.…”

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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Fluid flow regime transition in water lubricated spiral grooved face seals

Cited by 19 publications

References 28 publications

Thermo-Hydrodynamic Lubricating Behaviors of Upstream Liquid Face Seals with Ellipse Dimples

Thermo-Hydrodynamic Lubricating Behaviors of Upstream Liquid Face Seals with Ellipse Dimples

Performance Analysis of the Self-Pumping Hydrodynamic Mechanical Seal with a Conical Convergent Diffuser Groove

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

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