A Hydrostatic Laser Surface Textured Gas Seal

Feldman, Yuri; Kligerman, Y.; Etsion, I.

doi:10.1007/s11249-006-9066-z

Cited by 59 publications

(33 citation statements)

References 21 publications

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“…Due to the impedance in the flow by smaller clearance (h 2 ), hydrostatic load carrying capacity is enhanced. Partial surface texturing works in similar manner by forming an ''equivalent Rayleigh step'' between textured and non-textured portion of height h eq adjacent to the high pressure side [72] as shown in Fig. 6a.…”

Section: Support Mechanism By Full and Partial Surface Texturementioning

confidence: 99%

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: Support Mechanism By Full and Partial Surface Texturementioning

confidence: 99%

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

et al. 2015

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“…The dimensionless local spacing H * as a function of the dimensionless local coordinates X * ,Y * for one cell, shown in Fig. 4, is given by [16]:…”

Section: Theoretical Modelmentioning

confidence: 99%

“…11 that the friction coefficient decreases for increasing non-dimensional tape tension T/(p a R), regardless of the dimple aspect ratio e in accordance with Eq. (16).…”

Section: Frictionmentioning

confidence: 99%

A Model for Magnetic Tape/Guide Friction Reduction by Laser Surface Texturing

2007

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The friction coefficient between a magnetic tape and a guide in a tape path can be minimized by creating micro dimples on the guide surface with laser surface texturing. The dimples enhance the formation of an air bearing and reduce the friction coefficient between the tape and the guide due to the increased spacing. A model is presented to optimize the geometry of the surface texturing parameters to maximize the average air bearing pressure and minimize the tape/guide friction coefficient.

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“…Furthermore, the textured surfaces can also increase load-carrying capacity [6,7]. Laser surface texturing technology has been used in many technological fields to improve the tribological performances of contact surfaces, such as mechanical seals [10,11], cutting tools [12][13][14], piston rings [15] and thrust bearing [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of tribological properties of laser textured hardened tool steels

et al. 2016

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In this paper the laser surface texturing (LST) technology as one of the methods of tribological properties modifying of mating steel surfaces is analysed. The area density of dimple-like depression along with the dimple diameter are the only main factors which significantly influence the friction coefficient value, therefore the effect of different values of area density of dimples: 6 %, 11 % and 16 % on the contact coefficient of friction was analysed. Surface textures were manufactured on the planar areas of compression platens (90MnCrV8 tool steel) using a pulsed-beam laser. The values of coefficients of friction were obtained via a ring compression test. Test sample compression was realized in lubrication-free and hydrodynamic regime. A significant improvement of tribological properties in contact steel areas was experimentally observed in both friction regimes. The results of experiments showed that by applying of surface texturing with defined shape and dimensions of dimples and lubricating oil at the same time, the coefficient of friction value can be reduced to about of 75%.

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A Hydrostatic Laser Surface Textured Gas Seal

Cited by 59 publications

References 21 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

A Model for Magnetic Tape/Guide Friction Reduction by Laser Surface Texturing

Evaluation of tribological properties of laser textured hardened tool steels

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