A comparative study on the performance of typical types of bionic groove dry gas seal based on bird wing

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

doi:10.1016/s1672-6529(16)60305-0

Cited by 32 publications

(13 citation statements)

References 21 publications

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“…Despite that there are only few researchers pay attention to the experiment of the sealing performance test of DGS, most of the researchers only focus on the numerical simulation and analysis of groove structure and geometry parameters optimization as the subject to improve the gas film stiffness and reduce the fluid leakage of DGS. Jiang et al [20,21] introduces a new type of bionic cluster spiral groove dry gas seal (CS-DGS) based on the coupling bionic theory, and presents the numerical study on the influence of groove geometry parameters on the sealing performance, such as opening force, axial film stiffness and seal leakage. The results shows that the sealing performance and operation stability of bionic CS-DGS are much better compared to common unidirectional S-DGS at high speed.…”

Section: Open Accessmentioning

confidence: 99%

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

Jiang

Peng

et al. 2018

Chin. J. Mech. Eng.

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Spiral groove dry gas seal (S-DGS), the most widely used DGS in the world, encounters the problem of high leakage rate and inferior film stability when used in high-speed machinery equipment, which could not be well solved by optimization of geometrical parameters and molded line of spiral groove. A new type of bionic cluster spiral groove DGS (CS-DGS) is proved to have superior film stability than S-DGS at the condition of high-speed and low-pressure numerically. A bionic CS-DGS is experimentally investigated and compared with common S-DGS in order to provide evidence for theoretical study. The film thickness and leakage rate of both bionic spiral groove and common spiral groove DGS are measured and compared with each other and with theoretical values under different closing force at the condition of static pressure, high-speed and low-pressure, and the film stiffness and stiffness-leakage ratio of these two face seals are derived by the relationship between closing force and film thickness at the steady state. Experimental results agree well with the theory that the leakage and stiffness of bionic CS-DGS are superior to that of common S-DGS under the condition of high-speed and low-pressure, with the decreasing amplitude of 20% to 40% and the growth amplitude of 20%, respectively. The opening performance and stiffness characteristics of bionic CS-DGS are inferior to that of common S-DGS when rotation speed equals to 0 r/min. The proposed research provides a new method to measure the axis film stiffness of DGS, and validates the superior performance of bionic CS-DGS at the condition of high-speed and low-pressure experimentally.

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Section: Open Accessmentioning

confidence: 99%

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

Jiang

Peng

et al. 2018

Chin. J. Mech. Eng.

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“…textures like microdimples have been used extensively for mechanical seals. These microgrooves such as spiral grooves [9,10], T-shape grooves [11], and bi-directional radial grooves [12] can be chosen for strong pumping effect not only to generate the lubricating film, but also to control the leakage rate. In the case of microdimples, plenty of publications have contributed the optimal design of various microdimples shapes including circular [13], elliptical [14], rectangular [15], and triangular [16,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of typical surface texture patterns on mechanical seal performance

Shi

Wei

Wang

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Different types of surface texture patterns such as microgrooves and microdimples have a significant effect on mechanical seal performance. However, these patterns have been studied individually for improved performance in previous publications. The purpose of this paper is to investigate the effect of microgrooves and microdimples on friction coefficient and leakage rate. The micro-textured specimens (rotor ring, 304 stainless steel) are prepared by photolithography combined with electrolytic etching technology. The stator specimens are made of silicon carbide (SiC).The experiments are conducted by using a ring-on-ring type high-speed seal test apparatus. Experimental results indicate that the friction coefficient of all textured surfaces is lower than untextured specimens with increasing area density and texture depth, but the reduction of friction is always companied with increased leakage rate. In general, the optimum area density and texture depth are around 15% and 5 µm, respectively. When the area density, S p < 10%, microgrooves result in lower friction coefficient, but when the area density exceeds 10%, elliptical dimples has the lowest friction coefficient. Moreover, microgrooves interpenetrated the inner radius of the rotor ring with α = 45° can obtain lower friction coefficient and leakage rate. These findings provide a design reference for surface texturing on practical engineering applications.

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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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A comparative study on the performance of typical types of bionic groove dry gas seal based on bird wing

Cited by 32 publications

References 21 publications

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

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

Experimental investigation of the effect of typical surface texture patterns on mechanical seal performance

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

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