Mixed elastohydrodynamic lubrication analysis of line contact with Non-Gaussian surface roughness

Pei, Jiaxing; Han, Xu; Tao, Yourui; Feng, Shizhe

doi:10.1016/j.triboint.2020.106449

Cited by 38 publications

(19 citation statements)

References 32 publications

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“…Gu et al 24 analysed the lubrication characteristics of two anisotropic non-Gaussian surfaces by using an improved average flow model and a statistical elastoplastic concave-convex contact model. Pei et al 25 studied the lubrication characteristics of non-Gaussian rough surfaces under line contact mixed EHL. However, these studies have focused only on the lubrication parameters under a given simulated surface, and have not considered the variations in the lubrication characteristics due to the changes in the contact surface morphology caused by wear.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the tribological characteristics of non‐Gaussian rough surfaces during sliding wear in mixed lubrication

Zhao

Zhang

et al. 2022

Lubrication Science

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In mixed lubrication, material wear is inevitably caused due to solid contact.Simultaneously, the surface morphology after wear will affects the lubrication performance. To understand this coupling process, virtual surface reconstruction technology and mixed lubrication sliding wear model were applied to predict the evolution of wear characteristics and lubrication characteristics during wear in this study. The effects of the roughness root mean square (RMS), roughness direction and wavelength ratio on the contact area ratio, the contact load ratio, accumulated wear, film thickness and the friction coefficient were analysed. The results indicated that the contact area ratio and the contact load ratio and the friction coefficient decreased and average film thickness increased with the increase in the number of the wear cycles. In addition, a surface with low-roughness RMS, longitudinal roughness texture and highwavelength ratio is suitable for improving lubrication performance and reducing wear.

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Section: Introductionmentioning

confidence: 99%

Prediction of the tribological characteristics of non‐Gaussian rough surfaces during sliding wear in mixed lubrication

Zhao

Zhang

et al. 2022

Lubrication Science

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“…Wang et al 10 developed a newly transient mixed EHL model to study the transient friction, temperature and contact fatigue behaviors in different contact trajectories for spiral bevel gears. Pei et al 11 analyzed the mixed EHL solution of line contact with a non-Gaussian rough surface, and determined the dimensionless film contact pressure and film thickness. Guiggiani 12 proposed a boundary element method to solve the lubrication problem of finite bearing, and this method allows the RE to be easily transformed into a constant coefficient equation, making the BEM application a straightforward task.…”

Section: Introductionmentioning

confidence: 99%

Optimal operating condition of precision ball screws based on a transmission efficiency model

Sun

Wang

Gao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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The operating condition of ball screws is generally applied to ensure the ball screws with a high transmission efficiency and a high positioning accuracy. Aiming at the optimal operating condition of double-nut ball screws, a transmission efficiency model considering the kinematic analysis and lubrication status was proposed. Firstly, the distributions of the film bearing pressure, asperity bearing pressure, film thickness, and ratio of the asperity bearing pressure were determined based on the Reynolds equation. Subsequently, the transmission efficiency model was established by calculating the friction coefficient and friction torque of ball screws under various lubrication statuses and operating conditions. The optimal operating condition of double-nut ball screws can be determined by estimating the transmission efficiency and lubrication status to improve the manufacturing quality. Finally, a friction torque test based on the simulated model was designed and implemented on a self-designed bed for validation of the proposed model. The comparisons showed that the experimental friction torque was consistent with the simulated friction torque, which verified the effectiveness and correctness of the transmission efficiency model. Results showed that the optimal operating conditions of the entrainment velocity and axial working load could ensure high transmission efficiency and a good lubrication status, which are of great reference to the green processing and manufacturing fields.

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“…J.X. Pei 33 investigated the influence of non-Gaussian rough surfaces on the mixed EHL of line contact, which could be further used for evaluating the state and reliability of lubrication. For simplification, Eduardo 7 focused on the Greenwood-Williamson model and applied it to the PRCL system, which could be directly applied to rough engine surfaces.…”

Section: Introductionmentioning

confidence: 99%

An improved contact model considered the effect of boundary lubrication regime on piston ring-liner contact for the two-stroke marine engines from the perspective of the Stribeck curve

Xiuyi

Jiao

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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The prediction of lubrication performance is required to be the basement of friction optimization for marine engines. This paper simulates the lubrication performance of marine engines based on statistical models which have the advantages of fast, efficient, and macroscopic fault location. Boundary lubrication exists in the piston ring-cylinder liner (PRCL) of two-stroke marine engines because of the harsher load, lower speed, and larger structure. It has been proposed that there would be tribofilm under boundary lubrication which has a significant influence on the contact. To understand the boundary lubrication, it is necessary to study the lubrication regime transition. In this paper, firstly, the coefficient of friction curve combined with the thickness ratio embodies the lubrication regime transition process of two-stroke engines under work conditions. However, the phenomenon that the coefficients under boundary lubrication are smaller than that of other regimes shows the non-objectivity of this curve. Therefore, the Stribeck curve is introduced for objectively evaluating the transition. Then, the calculation of asperities contact pressure under boundary lubrication, which Wen proposed, is introduced into the classic Greenwood-Williamson model, the problem that the original model cannot reflect the boundary lubrication regime in the form of the Stribeck curve is improved. Finally, the results are compared before and after modifying the model to verify this study’s practicability. It provides more precise asperities contact pressure for the tribofilm growth calculation from the perspective of the Stribeck curve under the PRCL statistical model in future work.

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Mixed elastohydrodynamic lubrication analysis of line contact with Non-Gaussian surface roughness

Cited by 38 publications

References 32 publications

Prediction of the tribological characteristics of non‐Gaussian rough surfaces during sliding wear in mixed lubrication

Prediction of the tribological characteristics of non‐Gaussian rough surfaces during sliding wear in mixed lubrication

Optimal operating condition of precision ball screws based on a transmission efficiency model

An improved contact model considered the effect of boundary lubrication regime on piston ring-liner contact for the two-stroke marine engines from the perspective of the Stribeck curve

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