Transient EHL analysis of an elastomeric hydraulic seal

Thatte, Azam; Salant, Richard F.

doi:10.1016/j.triboint.2009.05.026

Cited by 36 publications

(15 citation statements)

References 12 publications

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“…The results for rod seals show that they operate with mixed lubrication and that the seal roughness is the most important parameter to prevent leakage. This work confirmed the transient numerical model performed by Azam et al [8] where the rod velocity variation was considered. This study showed that films are thinner during the outstroke comparing to the instroke case.…”

Section: Introductionsupporting

confidence: 89%

The Grooved Lip Effect on Reciprocating Hydraulic Rod Seal Performances in Transient Condition: Elastohydrodynamic Lubrication

Bahi¹,

Gadari

Rahmoune³

2020

International Journal of Applied Mechanics and Engineering

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It is commonly known that the sealing performance of dynamic seals is significantly influenced by the surface finish. To reduce friction effect and leakage ratio, new generations of grooved lip or shaft have emerged, but only two computational models were performed up to now with a textured elastomeric lip: spiral groove in the axial direction or micro-cavities according to the circumferential direction. However, if the numerical results have confirmed the slight effect of the grooved lip on the rotary lip seal performances, it seems relevant to investigate the influence of such grooves on the reciprocating hydraulic rod seal behavior.Thus, the scope of this work is to perform a parametric study of the grooved lip throughout a one-dimensional elastohydrodynamic model by taking into account the elasticity of the lip and the shaft roughness.After confirming the validity of the current model, numerical simulations have been performed and compared with experiments. The effect of lip grooves on the hydraulic rod seal behavior in outstroke and instroke shaft motion has been underlined. Thereby, it is shown that the leakage and the average film thickness are sensible to both the depth and the density of the lip groove. Additionally, a slight effect of the pattern shape is observed on the friction force.

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Section: Introductionsupporting

confidence: 89%

The Grooved Lip Effect on Reciprocating Hydraulic Rod Seal Performances in Transient Condition: Elastohydrodynamic Lubrication

Bahi¹,

Gadari

Rahmoune³

2020

International Journal of Applied Mechanics and Engineering

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show abstract

“…The distribution of contact pressure of pre-compression under the action of fluid pressure is compared to the distribution of dynamic contact pressure. Then, with the transient EHL model of hydraulic actuator, Thatte and Salant [7] studied *For correspondence the medium pressure, velocity of piston rod and internal/ external stroke, both of which have influences on hydrodynamic lubrication characteristics. Based on the assumption of mixed lubrication, Yang and Salant [8] and Yang et al [9] established the fluid-solid coupling seal lubrication models in two-dimensional plane for O-shaped ring and U-shaped ring as well as double-lip U-shaped ring and HBTS in the hydraulic actuator.…”

Section: Introductionmentioning

confidence: 99%

Lubrication performance analysis of sealing structures in rodless open cylinders

Zhong

Ren

et al. 2019

Sādhanā

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As the lubrication performance of sealing structures in rodless open cylinders varies with sliding velocity, the concept of a critical velocity is proposed based on the aforementioned characteristics and the lubrication performance of sealing structure is analysed. A finite-element model of sealing structure is established and the oil film load under dynamic lubrication condition is obtained. A two-dimensional theoretical model of lubrication performance in sealing structure is established based on the proposed critical velocity. The influence on critical velocity of parameters including pre-compression, geometry size and microscopic morphology is analysed. Considering surface microscopic morphology, generation of heat by friction, heat flux distribution and other factors, a three-dimensional numerical model of lubrication performance of sealing structure is established to reveal the influence of texture mechanism on lubrication performance. As concluded, with the increase of pre-compression, the lip angle and the temperature of lubrication oil, the critical velocity increases. The three-dimensional microscopic morphology of seal ring is found to pose obvious influence on critical velocity, and the isotropic microscopic morphology tends to form total lubrication under the same conditions.

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“…Rubber is widely used to manufacture rubber-moving components, such as rubber bearings, seals, automobile tyres, and brake blocks, in modern industrial applications [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Elastomer seal is a critical component in a hydraulic and pneumatic system, such as rod, piston, valve, and pump seals, because this seal can prevent the leakage of fluid (liquid or gas) into the surroundings, which leads to environmental pollution or failure of other machine components [2]. Particularly, in dynamic seals, the seal is installed between the two surfaces where the movement is a reciprocating sliding.…”

Section: Introductionmentioning

confidence: 99%

Fretting wear behavior of acrylonitrile–butadiene rubber (NBR) for mechanical seal applications

Shen

Peng

Meng

et al. 2016

Tribology International

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Transient EHL analysis of an elastomeric hydraulic seal

Cited by 36 publications

References 12 publications

The Grooved Lip Effect on Reciprocating Hydraulic Rod Seal Performances in Transient Condition: Elastohydrodynamic Lubrication

The Grooved Lip Effect on Reciprocating Hydraulic Rod Seal Performances in Transient Condition: Elastohydrodynamic Lubrication

Lubrication performance analysis of sealing structures in rodless open cylinders

Fretting wear behavior of acrylonitrile–butadiene rubber (NBR) for mechanical seal applications

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