A numerical study of lubricant film behaviour subject to periodic loading

Zarbane, Khalid; Zeghloul, Thami; Hajjam, Mohamed

doi:10.1016/j.triboint.2011.06.007

Cited by 11 publications

(7 citation statements)

References 24 publications

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“…In the meantime, the outside flow is suctioned to the sealing clearance. Moreover, it can reduce the film hydrodynamic bearing capacity and has destructive effect on the sliding surface [6].…”

Section: Geometry Of Mechanical Sealsmentioning

confidence: 99%

“…In non-contacting mechanical seals, for example, the compensation ring moves axially with random velocity. According to the geometric and kinematic of the sealing system, these velocities may have various features such as compound, transitory, periodic, irregular, spatial-temporal or permanent [6], which results in the enhancement or weakening of hydrodynamic capacity and excessive leakage. In addition, the variation of film pressure will also have a noteworthy influence on cavitation characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Influence of squeezing behavior on cavitation characteristics and performance parameters of mechanical seals with an efficient mass-conserving algorithm

Wang

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The purpose of this paper is to investigate the influence of squeezing and traction effects on the sealing performance of spiral groove mechanical seals. Firstly, a modified algorithm is proposed to solve the Reynolds equation with squeeze term and mass-conserving boundary conditions, which could effectively improve the calculation efficiency with high accuracy. Then, squeeze effect is put forward to analyze the cavitation characteristic at different boundary conditions and pressure distribution with various squeeze velocities. Finally, the squeeze effect on seal performance, i.e., fluid bearing capacity, clearance flow and cavitation region, under different operating conditions and structural parameters, is discussed. Results indicate that the traction effect has relatively apparent impact than squeeze effect on pressure and flow rate variation. Squeeze effect becomes less visible when the rotational speed exceeds 3000 r/min and film thickness or groove depth exceeds 20 μm. This result would contribute to revealing the feature of transient flow and dynamic response during unsteady conditions.

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Section: Geometry Of Mechanical Sealsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of squeezing behavior on cavitation characteristics and performance parameters of mechanical seals with an efficient mass-conserving algorithm

Wang

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…It was computed by using the Finite Element (FE) numerical code developed in Zarbane et al. 11 This code employed a discretization based on isoparametric elements with eight nodes subdivided into four-node linear elements to accurately determine the inactive areas. 12,13…”

Section: Numerical Studymentioning

confidence: 99%

Experimental study of lubricant film behaviour subject to periodic loading

Zarbane¹,

Zeghloul

Hajjam

2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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The dynamic loading in hydrodynamic bearings and squeeze film dampers submits the lubricant film to periodical squeeze actions. These solicitations have an effect on the film load-carrying capacity and can lead to its rupture (cavitation). In the present experimental study, we achieve a quantitative measure of the effect of geometric and kinematic parameters of the non-conforming contact on the hydrodynamic load-carrying capacity. On the designed test rig, the contact geometry, the average film thickness, the oscillations amplitude and frequency can be varied. The measured load-carrying capacity is compared to numerical predictions. The numerical results are in good agreement with the experimental data. Several oil film rupture modes have been observed. Each mode depends on the oscillations frequency, the oil bath height in the tank and the surface geometry.

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“…Agostino et al 8 identified the journal stability threshold by using an original approximate analytical approach for the nonsteady fluid film force and the stiffness and damping coefficients description in the case of low loaded porous journal bearings. Zarbane et al 9 presented a numerical study of the behavior of fluid film subjected to a periodic squeeze action which showed the effects of the frequency and the average film thickness on the film load-carrying ant the rupture. There are some other studies [10][11][12][13][14][15][16] of oil film dynamic characteristics for journal bearings analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Zarbane et al. 9 presented a numerical study of the behavior of fluid film subjected to a periodic squeeze action which showed the effects of the frequency and the average film thickness on the film load-carrying ant the rupture. There are some other studies 10–16 of oil film dynamic characteristics for journal bearings analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis of hydrodynamic loads on performance characteristics of engine main bearings

Shao

Liu

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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This article aims to present a numerical study of the behavior of engine main bearings under dynamic load. The coupling performance characteristics of oil film between crankshaft and engine block are analyzed. The film pressure is solved numerically with Reynolds boundary conditions when various bearing characteristics are calculated. Hydrodynamic lubrication is analyzed with finite difference method for solving the Reynolds equation for thermo effect. The other models, such as engine block and crankshaft-connecting rod system, are processed by utilizing the finite element method. Above this system, model applied in this paper is simulated by employing multi-body dynamic method to capture the dynamic characteristics of engine dynamic simulation. Through the methods mentioned above, the performance characteristics of engine main bearings under hydrodynamic loads in a six-cylinder in-line diesel engine were received. And the orbit movement, minimum oil film thickness, and power loss in the bearing were estimated over the wide range of engine operation.

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A numerical study of lubricant film behaviour subject to periodic loading

Cited by 11 publications

References 24 publications

Influence of squeezing behavior on cavitation characteristics and performance parameters of mechanical seals with an efficient mass-conserving algorithm

Influence of squeezing behavior on cavitation characteristics and performance parameters of mechanical seals with an efficient mass-conserving algorithm

Experimental study of lubricant film behaviour subject to periodic loading

Analysis of hydrodynamic loads on performance characteristics of engine main bearings

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