Wear simulation of a reciprocating seal by global remeshing

Békési, Nándor; Váradi, Károly

doi:10.3311/pp.me.2010-2.02

Cited by 16 publications

(13 citation statements)

References 9 publications

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“…The Archard model is commonly applied to calculate the seal wear [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. In the Archard wear model, the wear volume is calculated by

where V is the material wear volume, K is the wear coefficient, S is the relative sliding distance of surface, W is the normal load on the surface, H is the hardness of softer material.…”

Section: Wear Analysismentioning

confidence: 99%

“…The wear depth of the seal lip is solved by the Archard wear model. Békési et al [ 26 , 27 ] simulated the wear process of the reciprocating seal. Considering the effects of temperature, a structural and thermal coupling simulation model is developed based on the FEM to study the wear of the seals, including the O-shape seal and rectangular-section seal [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

2020

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Reciprocating rod seals are widely used in the hydraulic actuator to prevent the leakage of fluid. The sealing lip profile changes with the seal wear, resulting in an increase in the leakage. A texturing rod changes the lubrication characteristics of the seal, so it affects the wear and leakage of the seal. A numerical simulation method is proposed to investigate the wear of the hydraulic reciprocating seal with textured rods. Several kinds of macro-cavity textures on the rod surface, including circle, square and triangle shapes, have been simulated and discussed. The effects of three shape parameters including area ratio, depth, and ratio of the axial length to the circumferential length on the seal wear are analyzed in detail. The texturing rod slightly increases the seal wear, but decreases the seal leakage. When the rod speed is increasing, the wear time rates of the seal increase, while the wear distance rates decrease, regardless of the texture shapes. When the texture area ratio is increasing, the wear of the reciprocating seal increases. Seal wear decreases with an increasing texture depth during the outstroke, however, it increases during the instroke. The ratio of the axial length of the macro-cavity to the circumferential length has no effect on the seal wear.

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“…The Archard model is commonly applied to calculate the seal wear [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. In the Archard wear model, the wear volume is calculated by

where V is the material wear volume, K is the wear coefficient, S is the relative sliding distance of surface, W is the normal load on the surface, H is the hardness of softer material.…”

Section: Wear Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

2020

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“…The displacement component due to structural deformation can be determined from Equation (16) as follows:…”

Section: Fundamental Solution On the Half Space For Rssr Contact Problemmentioning

confidence: 99%

“…A linear relationship was experimentally proven by Schallamach for elastomer [13]. His result is used in many works [14][15][16] for the calculation of the sealing wear with the wear laws of Archard [17]. The wear laws of Archard (28), which have been frequently used up to now, use an empirically determined wear coefficient α A .…”

Section: Introductionmentioning

confidence: 99%

Friction Energy-Based Wear Simulation for Radial Shaft Sealing Ring

et al. 2020

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Radial shaft sealing rings (RSSR) are important machine elements used in rotating and oil lubricated systems. Their main task is to prevent oil from exiting the system and dirt particles from entering the system. When this function is not fulfilled, a leakage can occur and cause excessive damage after certain operating times, such as gear failure due to insufficient lubrication. This is the reason for the high level of current research interest in seals. The sealing function of RSSR occurs in the contact area between the sealing lip and the shaft. The contact takes place over a very small contact width of approximately 1 μm. These extremely small dimensions and the complex relationships between the functional influencing variables on the radial shaft sealing system make it difficult to simulate wear on the sealing ring. The energetic consideration of the wear process offers the possibility of quantifying influencing variables more easily by their energetic contribution, which can be determined experimentally. Based on experimentally measured total friction moments, and with the help of a semi-analytical (SA) solid contact model based on the half-space theory, this paper presents a modelling approach for the calculation of wear at the sealing ring. The model presented in this work differs from the existing models in two ways. The first particularity is the coupling of SA method with finite element method (FEM) for the resolution of the contact between the sealing lip and the shaft, allowing a fine discretization of the contact zone (by SA method) and the consideration of the structural behavior (by FE method). The SA method compared to the commonly used FEM presents a great saving in computation time. The second particularity is the use of the real data obtained during the wear tests. Most existing simulation models are based purely on contact pressure. This means that through the contact pressure obtained by simulation and a given sliding distance value, a friction energy will be estimated which will be used in a next step using a wear model such as Archad’s to calculate the wear rate. In this publication the value of friction energy was obtained directly on an experimental basis and a more appropriate wear law, such as Fleischer’s, taking into account the friction conditions, was used to estimate the wear rate.

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“…Few studies have been presented on the wear simulation of the seals. Nandor et al [18,19] proposed an FE method for wear simulation of reciprocating seal. Archard's wear model was included to model the variation of the seal's profile and subsequently the mesh reconstruction technology was applied on the modified field of the seal.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Analysis Method of Hydraulic Seals for Downhole Equipments

Peng

Wang

et al. 2013

Advances in Mechanical Engineering

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The aim of this paper is to present a numerical method to predict the work performance of hydraulic seals used in downhole equipments. The impact of key factors, namely, compression rate and the number of seals, on the wearing behavior of seal components is studied. To simulate the wear process of sealing contact surface, a methodology is built with the iterative wear prediction procedure in which the geometry of the contact interface progressively changes according to the wear model. In this method, the structural and the thermal coupled mechanism is investigated and the performance of seal structure containing different number of seals is discussed. By taking a gear pump used in the downhole robots as a case study, both numerical analysis with proposed method and practical experiment are presented. The simulation results of the worn volume of the seals are consistent with the experiment data. This work provides an effective computerized approach to aid seal components design and manufacturing for downhole equipments.

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Wear simulation of a reciprocating seal by global remeshing

Cited by 16 publications

References 9 publications

A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

Friction Energy-Based Wear Simulation for Radial Shaft Sealing Ring

A Numerical Analysis Method of Hydraulic Seals for Downhole Equipments

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