Experimental study of two-phase mechanical face Seals with laser surface texturing

Wang, Tao; Huang, Weifeng; Liu, Xiangfeng; Li, Yongjian; Wang, Yuming

doi:10.1016/j.triboint.2013.12.009

Cited by 77 publications

(28 citation statements)

References 19 publications

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“…Several benefits of surface texturing on mechanical seals have been found over the past few years, which are listed below 1. Increase in load carrying capacity [20,30,63,65,66,68,69,73]. 2.…”

Section: Surface Texturing In Mechanical Sealsmentioning

confidence: 99%

“…Recently Wang et al [69] investigated two-phase mechanical seals with laser surface textured end faces using transparent rotating rings so that the distribution of liquid/vapour region can be observed using a camera. The texturing dimensions are mentioned in Table 2.…”

Section: Dimple Diameter Density and Aspect Ratiomentioning

confidence: 99%

“…1.2, various shapes have been investigated for mechanical seals case. Few shapes investigated are; circle [18,67,69,109], triangle [109], ellipse [67,99], diamond [110], square [110] and hexagon [110]. Among the above shapes, only the performance of circle, ellipse, triangle shaped dimples have been experimentally investigated in mechanical seals by Qiu et al [67] and Xie et al [109].…”

Section: Shape Orientation and Position Of Dimplesmentioning

confidence: 99%

See 2 more Smart Citations

An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

et al. 2015

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Surface texturing has been effectively used to improve tribological performance of sliding surfaces. Reduction in friction, increase in hydrodynamic load carrying capacity, reduction in wear and increase in fluid film stiffness are few examples of the benefits that can be obtained by surface texturing. In order to obtain these benefits, several researchers have investigated the effects of surface texturing geometrical parameters on the performance of different applications. If these geometrical parameters are not optimized for each application, they may have detrimental effects on their performance. These geometrical parameters in case of micro dimples include depth, diameter, depth to diameter ratio, shape and density of dimples. In this paper, the author reviews the effects of these geometrical parameters on the performance of two applications piston ring/cylinder assembly and mechanical seals.

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Section: Surface Texturing In Mechanical Sealsmentioning

confidence: 99%

Section: Dimple Diameter Density and Aspect Ratiomentioning

confidence: 99%

Section: Shape Orientation and Position Of Dimplesmentioning

confidence: 99%

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An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

et al. 2015

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“…Arauz and San Andres presented the theoretical model for cryogenic annular seals and carried out the experimental measurements of a liquid and gaseous nitrogen seal [5,6]. In other high-temperature and high-pressure working conditions, special seal testing has also been carried out, such as for the hydrostatic seal for nuclear coolant pumps and the non-contact seal for high-pressure pumps in the petrochemical industry [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Test on a Cryogenic High-Speed Hydrodynamic Non-Contact Mechanical Seal

et al. 2017

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This version is available at https://strathprints.strath.ac.uk/61655/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Abstract The non-contact mechanical seal of a high-speed turbopump in a liquid rocket engine operates under very harsh conditions (such as rapid start-up, cryogenic, highspeed, high-pressure and low-viscosity sealing fluid). The performance of the seal is very different to the performance under normal running conditions. In this paper, for the sake of safety, an experiment is carried out with liquid nitrogen as the sealing fluid. The experimental results with liquid nitrogen are expected to provide an equivalent seal performance as would be experienced with liquid oxygen and liquid hydrogen rocket engine. The main performance parameters, including face temperatures, leakage, face friction force, and friction coefficients, are measured in the speed-up, stable, and speed-down stages. The results show that in the speed-up stage, with rapidly increasing speed, the local face temperature rises dramatically to even higher than the vaporization temperature of liquid nitrogen, and a two-phase flow phenomenon occurs. In the start-up and stable stages, the friction coefficients are 0.25 and 0.13, respectively. After the test, it was found that the wear thickness of the rotor was 0.2 mm, and serious point corrosion appeared on the surface of the stator.

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“…Hu et al [8] found that the seal dam could prevent cavitation of radial grooved face seals and cavitated area increased with the increment of rotary speed and, on the contrary, cavitated area decreased with the increment of groove depth. Wang et al [9] observed that the cavitation region was not restricted to the dimples in the two-phase laser surface texturing mechanical face seals. The hydrodynamic effect produced by cavitation increases the load capacity on the end faces so that the gap between the seal faces increased.…”

Section: Introductionmentioning

confidence: 99%

Research on Cavitation Regions of Upstream Pumping Mechanical Seal Based on Dynamic Mesh Technique

Chen

et al. 2014

Advances in Mechanical Engineering

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In order to study the cavitation area of the Upstream Pumping Mechanical Seal, three-dimensional microgap inner flow field of the Upstream Pumping Mechanical Seal was simulated with multiphase flow cavitation model and dynamic mesh technique based on hydrodynamic lubrication theory. Furthermore, the simulated result was compared with the experimental data. The results show that the simulated result with the Zwart-Gerber-Belamri cavitation model was much closer to the experimental data. The area of cavitation inception mainly occurred at the concave side of the spiral groove and surrounding region without spiral grooves, which was nearly covered by the inner diameter to roots of grooves; in addition, the region near the surface of the stationary ring was primary cavitation location. The area of cavitation has little relationship with the medium pressure; however, it became larger following increasing rotating speed in the range of researched operating conditions. Moreover the boundary of cavitated area was transformed from smooth to rough, which occurred in similar film thickness. When cavitation number was decreasing, which was conducive to improving the lubrication performance of sealed auxiliary, it made the sealing stability decline.

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Experimental study of two-phase mechanical face Seals with laser surface texturing

Cited by 77 publications

References 19 publications

An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

An Experimental Test on a Cryogenic High-Speed Hydrodynamic Non-Contact Mechanical Seal

Research on Cavitation Regions of Upstream Pumping Mechanical Seal Based on Dynamic Mesh Technique

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