Thermal contact conductance between balls and bearing rings

Liu, Jialan; Ma, Chi; Wang, Shilong

doi:10.1016/j.icheatmasstransfer.2020.104780

Cited by 11 publications

(8 citation statements)

References 36 publications

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“…Ma et al (2015) studied the effects of contact load, surface roughness, contact area and temperature on TCC. Liu et al (2020) established the model of TCC between balls and bearing rings and verified the validity of the proposed model by experiments. The above researches are based on the two-dimensional fractal theory, but it is unreasonable to describe the three-dimensional asperity of the joint surfaces with the two-dimensional fractal theory.…”

Section: Introductionmentioning

confidence: 77%

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

Sun

Meng

Duan

2022

ILT

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Purpose The purpose of this study is to propose a fractal model of thermal contact conductance (TCC) of two spherical joint surfaces, considering friction coefficient based on the three-dimensional fractal theory. Design/methodology/approach The effects of friction coefficient, fractal parameters, radius of curvature and contact type on TCC were analyzed using numerical simulation. Findings The results indicate that the TCC decreases with the increase of friction coefficient and fractal roughness and increases with the increase of fractal dimension and radius of curvature; the contact type of two spherical joint surfaces has an important influence on the TCC, and the TCC of external contact is smaller than that of internal contact under the same contact load. Originality/value A fractal model of TCC of two spherical joint surfaces considering friction coefficient is proposed in this paper. Achievements of this work provide some theoretical basis for the research of TCC of bearings and other curved surfaces.

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Section: Introductionmentioning

confidence: 77%

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

Sun

Meng

Duan

2022

ILT

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“…Therefore, the contact thermal resistance between rough surfaces is a key scientific issue. Liu et al [906] studied the contact thermal resistance between the curved surface and the spherical surface shown in Fig. 70 and established a contact thermal resistance prediction model considering the rough surface of the ball bearing under actual working conditions.…”

Section: Thermal Contactmentioning

confidence: 99%

“…Dai et al [908] proposed Fig. 70 The heat transfer mechanism of ball bearings [906]. Reproduced with permission from Ref.…”

Section: Thermal Contactmentioning

confidence: 99%

“…Reproduced with permission from Ref. [906], © Elsevier Ltd., 2020. | https://mc03.manuscriptcentral.com/friction a dual-iterative thermal-mechanical coupling method for predicting the contact thermal resistance, which considered the effect of thermal expansion on the contact thermal resistance and showed the difference up to 91.4% in comparison with that of without thermal expansion, indicating the importance of considering the influence of thermal expansion.…”

Section: Thermal Contactmentioning

confidence: 99%

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A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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“…Liu et al (2019) proposed a TCC model between circular-arc rough contact surfaces and studied the effects of different materials, external contact temperature, contact-surface roughness and contact pressure on the TCC. Liu et al (2020a), Liu et al (2020b) and Ma et al (2020) established a new TCC model between cylindrical surfaces by introducing an effective contact factor. The above studies are based on the two-dimensional fractal theory, but it is unreasonable to describe the three-dimensional asperity of rough surfaces.…”

Section: Introductionmentioning

confidence: 99%

Fractal model of thermal contact conductance of rough surfaces based on cone asperity

Sun

Xing

2023

AEAT

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Purpose The purpose of this paper is to propose a fractal model of thermal contact conductance (TCC) of rough surfaces based on cone asperity. Design/methodology/approach A detailed numerical study is conducted to examine the effects of contact load, fractal dimensional, fractal roughness and material properties on the TCC of rough surfaces. Findings The results indicate that when the fractal dimension D is less than 2.5, the TCC of rough surfaces increases nonlinearly with the increase of the contact load. However, when the fractal dimension D is greater than or equal to 2.5, the TCC of rough surfaces increases linearly with the increase of the contact load; the TCC of the rough surfaces increases with the increase of the fractal dimension D and the decrease of the fractal roughness G; the material parameters also have an influence on the TCC of the rough surfaces, and the extent of the effect on the TCC is related to the fractal dimension D. Originality/value A fractal model of TCC of rough surfaces based on cone asperity is established in this paper. Some new results and conclusions are obtained from this work, which provides important theoretical guidance for further study of TCC of rough surfaces.

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Thermal contact conductance between balls and bearing rings

Cited by 11 publications

References 36 publications

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

A review of advances in tribology in 2020–2021

Fractal model of thermal contact conductance of rough surfaces based on cone asperity

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