Leakage and Stiffness Characteristics of Bionic Cluster Spiral Groove Dry Gas Seal

Jiang, Jinbo; Peng, Xudong; Li, Jiyun; Chen, Yuan

doi:10.1186/s10033-018-0227-4

Cited by 25 publications

(11 citation statements)

References 20 publications

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“…Jiang et al. 9 employed the same sensor array used by Chen et al. 8 to compare a dry gas seal with 15° spiral grooves to a seal with Bionic Cluster grooves.…”

Section: Introductionmentioning

confidence: 99%

Experimental measurements of the thermo elastic behavior of a dry gas seal operating with logarithmic spiral grooves of 11° and 15°

Chávez

Santiago²

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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This work shows the experimental thermo elastic behavior of the stationary ring of a dry gas seal with logarithmic spiral grooves of 15° (common commercial configuration) and 11° spiral (configuration evaluated to confirm analytical predictions developed on previous works), as well as the hydrodynamic pressure of the fluid film. The stationary ring temperature is obtained through an array of sensors embedded in the ring and the ring deformation, resulting from the thermal and mechanical load, is collected by two strain gages. The hydrodynamic pressure produced in the fluid film is measured using dynamic pressure sensors. Two novel instrumentation methods are defined to collect the ring deformation and the dynamic pressure of the seal. The results show that the seal with spiral grooves of 11° at low speed presents a temperature increment induced by the contact between the rings; this contact may induce the premature fault of the rings, so that the 11° spiral seal needs more speed than the spiral of 15° to enter a hydrodynamic lubrication regime. The experiments show that the stationary ring distortion is induced by the temperature gradient and by the hydrostatic and hydrodynamic pressure; however, the thermal distortion of the ring is dominant for the current experimental conditions. The ring’s axial distortion also affects the seal static and dynamic performance due to the modification of the hydrodynamic regime.

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“…Jiang et al. 9 employed the same sensor array used by Chen et al. 8 to compare a dry gas seal with 15° spiral grooves to a seal with Bionic Cluster grooves.…”

Section: Introductionmentioning

confidence: 99%

Experimental measurements of the thermo elastic behavior of a dry gas seal operating with logarithmic spiral grooves of 11° and 15°

Chávez

Santiago²

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…At present, many studies on DGS are based on steady-state theory, where the film thickness is considered to be stable and constant (Jiang et al, 2016(Jiang et al, , 2018Zong et al, 2017). However, in practice, due to factors such as axial vibration and installation deviation, the film thickness between the seal end faces is difficult to maintain stable.…”

Section: Introductionmentioning

confidence: 99%

The influence of 3-DOF film thickness disturbance on transient performance of typical spiral groove dry gas seals

Chen

Shang

et al. 2021

ILT

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Purpose The purpose of this paper is to investigate the influence rule and mechanism of three degrees of freedom film thickness disturbance on the transient performance of spiral groove, upstream pumping spiral groove dry gas seal (UP-SDGS) and double-row spiral groove dry gas seal (DR-SDGS). Design/methodology/approach The transient performance of spiral groove, UP-SDGS and DR-SDGS are obtained by solving the transient Reynolds equation under different axial and angular disturbance coefficients. The transient and steady performance of the above-mentioned DGSs are compared and analyzed. Findings The film thickness disturbance has a remarkable impact on the sealing performance of DGS with different structures and the calculation deviations of the leakage rate of the UP-DGS will increase significantly if the film thickness disturbance is ignored. The axial and angular disturbance jointly affect the film thickness distribution of DGS, but there is no significant interaction between them on the transient sealing performance. Originality/value The influence mechanism of axial disturbance and angular disturbance on the transient performance of typical SDGSs behavior has been explained by theory. Considering small and large disturbance, the interaction between axial disturbance and angular disturbance on the transient performance have been studied.

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“…Bonneau et al (1993) and Grigorev and Smirnov (2013) discussed the film stiffness characteristics of spiral groove gas thrust bearings in different conditions, and optimum geometry is identified in terms of the main governing parameters of spiral groove. Inspired from biology in nature, Jiang et al (2016Jiang et al ( , 2018 conducted a comparative analysis of the stiffness characteristics of three new proposed bionic groove DGSs, which shows that cluster spiral groove DGS possesses larger film stiffness. The dynamic characteristics of various modified surfaces comparatively analyzed by Blasiak and Zahorulko (2016) indicate that the amplitude of angular vibrations of the stator could be decreased significantly via proper design of face structures.…”

Section: Introductionmentioning

confidence: 99%

Steady performance and dynamic characteristics of a superellipse groove dry gas seal at a high-speed condition

Kou

Wang

et al. 2020

ILT

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Purpose The purpose of this paper is to enhance film stiffness and control seal leakage of conventional spiral groove dry gas seal (S-DGS) at a high-speed condition by introducing a new type superellipse surface groove. Design/methodology/approach The steady-state performance and dynamic characteristics of superellipse groove dry gas seal and S-DGS are compared numerically at a high-speed condition. The optimized superellipse grooves for maximum steady-state film stiffness and dynamic stiffness coefficient are obtained. Findings Properly designed superellipse groove dry gas seal provides remarkable larger steady-state film stiffness, dynamic stiffness coefficient and lower leakage rate at a high-speed condition compared to a typical S-DGS. The optimal values of first superellipse coefficient for maximum steady and dynamic stiffness are 1.3 and 1.4, whereas the optimal values of second superellipse coefficient for which are 1.4 and 2.0, respectively. Originality/value A new type of molded line, namely, superellipse curve, is proposed to act as the boundary lines of surface groove of dry gas seal, as an alternative of typical logarithm helix. The conclusions provide references for surface groove design with larger stiffness and lower leakage rate at a high-speed condition.

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Leakage and Stiffness Characteristics of Bionic Cluster Spiral Groove Dry Gas Seal

Cited by 25 publications

References 20 publications

Experimental measurements of the thermo elastic behavior of a dry gas seal operating with logarithmic spiral grooves of 11° and 15°

Experimental measurements of the thermo elastic behavior of a dry gas seal operating with logarithmic spiral grooves of 11° and 15°

The influence of 3-DOF film thickness disturbance on transient performance of typical spiral groove dry gas seals

Steady performance and dynamic characteristics of a superellipse groove dry gas seal at a high-speed condition

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