Investigation into the influence of stretching on reciprocating rod seals based on a novel 3-D model vs axisymmetric model

Peng, Chao; Ouyang, Xiaoping; Zhu, Yi; Guo, Shuxiang; Zhou, Qinghe; Yang, Huayong

doi:10.1016/j.triboint.2017.06.020

Cited by 23 publications

(12 citation statements)

References 14 publications

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“…The solid contact mechanism between two surfaces that are sliding relative to each other is quite complex and is not yet sufficiently known. 28 As the Greenwood-Williamson model is widely used in current studies of reciprocating seals, 7,[9][10][11][13][14][15][16][17][18][19][20] this contact model is also employed in this paper. A Gaussian distribution is assumed to exist for these asperities, and the solid contact pressure can be calculated by the Greenwood-Williamson contact model 29 :…”

Section: Contact Mechanismmentioning

confidence: 99%

“…In this method, FEA commercial software is used to obtain the macrostatic deformation, while the numerical procedure is applied to calculate the tribological characteristics, such as the film thickness, friction and leakage in the dynamic reciprocating motion. The coupling method has been widely employed in the study of single seals such as O-rings, [4][5][6][7][8][9] U-cup seals [10][11][12][13][14] and some combined seals such as Step seals 15,16 and VL seals. [17][18][19][20] However, the above studies focused mainly on the sealing performance under normal temperature conditions, while little research has been conducted on the sealing performance in a wide temperature range.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the tribological performance of reciprocating seals in a wide temperature range

Peng

Ouyang

Schmitz

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Reciprocating seals are widely used in general industrial machines and are designed to endure rigorous working conditions. Among the harshest challenges, the wide temperature range they withstand has a significant influence on their sealing performance. However, most studies of reciprocating seals have focused only on their sealing characteristics at normal temperatures. To investigate the impacts of temperature on the seal's tribological performance, this paper examines the VL seal, a kind of combined seals, and discusses its performance in a wide temperature range. Material properties of the VL seal at temperatures from −55 °C to 135 °C are measured based on the seal product. The thermo-viscosity effect and the influence of thermal expansion and contraction are both considered in the reciprocating seal modelling. A coupling method that combines the finite-element analysis model with a mixed-lubrication procedure is implemented. For deformation calculation, a comparison between the influence coefficient method and the semi-infinite space method is conducted, and finds only minuscule disparities for the VL-seal analysis. To avoid the divergent problem due to high viscosity at low temperatures, this paper proposes the successive approaching method. Details of the sealing zone in the outstroke and instroke are systematically discussed in relation to a wide range of temperatures. The corresponding experiments are conducted and compared with the simulation. The results indicate that the temperature has a tremendous influence on the tribological performance. The leakage and the friction at the high temperature are much higher than those at the normal temperature.

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Section: Contact Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the tribological performance of reciprocating seals in a wide temperature range

Peng

Ouyang

Schmitz

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some studies on sealing performance of reciprocating rod seal have been performed under mixed lubricating conditions. 4–12 In these studies, the total load applies on the seal lip is considered to be the sum of fluid pressure and asperity contact pressure. Some researches on typical reciprocating seals, such as O-ring, U-cup seal, and step seal, have revealed that the seal normally works in mixed lubrication and the operating conditions plays an important role in determining the seal performance, including friction force and the leakage of the seal.…”

Section: Introductionmentioning

confidence: 99%

“…31 This model combined with the G-W contact model 32 has been used to describe the mixed lubrication of the dynamic seal. 4–12 de Boer et al. 33 developed a multiscale method for the elasto-hydrodynamic lubrication (EHL) of line contacts, in which the flow factors are used to handle the coupling relationship between microscale model and macroscale model.…”

Section: Introductionmentioning

confidence: 99%

A multiscale wear model for reciprocating rod stepseal under mixed lubricating conditions based on linear elasticity

Ran

Wang

Liu

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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The macroscale simulation methods are commonly used to study the wear of reciprocating seals to analyze macroscopic effects on the seal wear. There is a lack of numerical method for analyzing the wear of reciprocating seal under mixed lubricating conditions. According to experimental studies, some microscopic factors, including lubrication characteristics and surface roughness, are important for wear of reciprocating seal. Hence, in the presented research, a numerical model is proposed to analyze the effects of microscopic factors on reciprocating rod stepseal wear. O-ring of the stepseal is considered to be hyper elastic, while Turcon ring of the stepseal, which directly contacts with rod surface, is assumed to be linear elastic. The effects of microscopic aspects, including lubrication characteristics, are highlighted and analyzed. Furthermore, the seal wears under different operating conditions are analyzed and discussed. The simulation results show that the seal wears during outstroke and instroke are different. With the rod speed increasing, the wear distance rate increases during outstroke, while decreases during instroke. The seal wear increases with the sealed pressure increasing and/or compression rate increasing. With the increase in the fluid viscosity, the wear of the seal increases during outstroke and decreases during instroke. With the increase in the seal surface roughness, the seal wear decreases during outstroke and increases during instroke.

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“…For example, the rubber sealing ring is one of the most widely used kind of seals, as the main sealing elements and auxiliary sealing elements. [9][10][11][12] Generally, the seals are always stored for a period of time, before put into use, especially in aeronautic and aerospace engineering. 13 The performance of the rubber sealing rings continuously degenerates with the aging of rubber material during storage in air.…”

Section: Introductionmentioning

confidence: 99%

Bayesian model averaging based storage lifetime assessment method for rubber sealing rings

Liu

Wang

Zhang

et al. 2019

Advances in Mechanical Engineering

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Rubber sealing ring is one of the most widely used seals. It is always stored for a period of time before put into use, especially in aeronautic and aerospace applications. It is necessary to evaluate the storage lifetime of rubber sealing rings. However, due to the long storage lifetime of rubber sealing rings, two issues need to be handled, including model uncertainty and lack of storage lifetime data. A Bayesian model averaging based storage lifetime assessment method for rubber sealing rings is proposed in this article. The Gamma distribution model and Weibull distribution model are selected as the candidate models and combined based on Bayesian model averaging method. The Bayesian model averaging method is applied to handle the model uncertainty. Considering the lack of storage lifetime data, the degradation data are utilized to give the priors of model probability and distribution parameters based on the similarity principle. The results indicate that the proposed method has smaller minus log-likelihood value and is better than the other discussed method, considering both goodness of fit and complexity.

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Investigation into the influence of stretching on reciprocating rod seals based on a novel 3-D model vs axisymmetric model

Cited by 23 publications

References 14 publications

Investigation of the tribological performance of reciprocating seals in a wide temperature range

Investigation of the tribological performance of reciprocating seals in a wide temperature range

A multiscale wear model for reciprocating rod stepseal under mixed lubricating conditions based on linear elasticity

Bayesian model averaging based storage lifetime assessment method for rubber sealing rings

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