Fabrication of micro-texture on cylindrical inner surface and its effect on the stability of hybrid bearing

Hao, Xiaohong; Sun, Helong; Wang, Li; Ali, Qaisar; Li, Liang; He, Ning

doi:10.1007/s00170-020-05750-8

Cited by 15 publications

(4 citation statements)

References 23 publications

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“…Compared with the other two lubricant grooves, the circular blind hole-shaped lubricant grooves machined on the inner surfaces of the bearing bushes do not nearly reduce the load carrying capacity of journal bearings. In the process of the circular blind hole-shaped lubricant grooves, this kind of lubricant groove need to be grinded and polished, thereby leading to the formation of wedge angle (0.1°–0.3°) between these lubricant grooves and the inner surfaces of bearing bushes (Hao et al , 2020; Vlădescu et al , 2019). As a result, the reciprocating swing tribological tests only need a small angle to make the lubricating medium cover the entire inner surfaces of the journal bearing.…”

Section: Resultsmentioning

confidence: 99%

“…Vlădescu et al (2019) used laser surface textures into journal bearings of internal combustion engine and experiments results demonstrated that friction coefficients of the bearing with a texture pattern exhibited substantial reduction. Hao et al (2020) prepared the micro-textures on the inner surface of the hybrid bearing via the electrochemical micromachining technique and then analyzed the influences of micro-texture on the vibration characteristics and stability of the bearing rotor. Lin et al (2016) researched the lubrication mechanism of the journal bearing with partial texture surface by a visualization instrument.…”

Section: Introductionmentioning

confidence: 99%

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The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Yan

Xue

Wei

et al. 2021

ILT

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Purpose This paper aims to elucidate the effects of lubricant groove shape, vertical load, swing angle and grease injection cycle on the friction and wear performances of journal bearings under the grease lubrication condition. Design/methodology/approach Three different types of lubricant grooves, namely, numeral eight-shaped, axial straight line-shaped and circular blind hole-shaped, were designed and machined in the bearing bush of journal bearings. The tribological behaviors of these journal bearings were investigated on the self-developed reciprocating swing friction and wear tester. Experimental data including the friction coefficient, the friction temperature, the wear loss and wear time were analyzed in detail. The wear morphologies of friction pairs were observed by scanning electron microscope and confocal laser scanning microscope. Findings The load carrying capacity and service life of the journal bearing with circular blind hole-shaped lubricant grooves are not affected. However, the load carrying capacities of journal bearings with numeral eight-shaped and axial straight line-shaped lubricant grooves are declined. The coverage areas of lubricating grease in the bearing bush are associated with the swing angle. The smaller the swing angle is, the more limited the coverage areas of lubricating grease get. Among these journal bearings, the maintenance-free time of journal bearing with circular blind hole-shaped lubricant grooves is the longest because of its large grease storage capacity. Originality/value The journal bearing with circular blind hole-shaped lubricant grooves exhibits the excellent antifriction and wear-resistant properties, making it suitable for the application in the low-speed and heavy-load engineering conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Yan

Xue

Wei

et al. 2021

ILT

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“…Filgueira Filho et al (2021) carried out an experimental analysis of the effect of the micro-textured journal on bearing performance and showed that the effect of the texture could be beneficial or detrimental depending on the direction of movement of the journal. Hao et al (2020) proposed an improved method using electrochemical micromachining to fabricate micro-textured structures with different dimensions on the inner surface of the bearing and performed stability tests of the texture bearings. Galda et al (2019) experimentally investigated the effect of micro-textured on bearing performance and demonstrated that micro-textured reduced friction during the start-up and stopping of the bearing.…”

Section: Introductionmentioning

confidence: 99%

Influence of the distribution position and arrangement of micro-textured on the performance of the hydrostatic bearing

Chen

Sun

Zhao

et al. 2023

ILT

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Purpose The accuracy of the machining process is significantly impacted by the performance of hydrostatic bearings. This paper aims to analyze the influence of micro-textured on the performance of the hydrostatic bearing, and the performance of the bearing is improved by designing the arrangement of micro-textured. Design/methodology/approach Different designs have been used while creating micro-textured bearings. The finite element models of bearing with smooth and micro-textured were established and solved using the computational fluid dynamics method. The arrangement scheme of the micro-textured was evaluated by comparing the influence of the distribution position and arrangement of the micro-textured on the bearing performance. Findings To improve the performance of the bearing, the bearing capacity was significantly increased, and the friction coefficient of the bearing was decreased when the micro-textured was distributed in the form of an obtuse angle arrangement in the maximum pressure area of the bearing. The experimental findings validate the analysis method. Originality/value In this paper, the effect of irregularly arranged micro-textured on bearing performance is investigated to improve the bearing capacity and lubrication status.

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“…Pan et al [18] found that the microhole texture and vertical microgroove texture were able to effectively reduce the surface roughness of the workpiece. Xiuqing Hao [19] fabricated the microstructures on the inner surface of the hybrid bearing, and showed the micro-texture with reasonable area ratio could significantly reduce the vibration amplitude under water film lubrication. Gherca [20] proposed the textures on the rotor could improve the hydrodynamic performance of the thrust bearing.…”

Section: Introductionmentioning

confidence: 99%

Research on The Controllable Interface Response Enhancement of The Textured Pilot Valve

Xu¹,

Zhang²,

Fan³

et al. 2022

Preprint

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Based on the textured controllable interface effect, the dynamic performances of the textured and ordinary pilot valve are analyzed experimentally, and the influence of the textured controllable interface on the response of pilot valve is studied. Results show that when Pin is small, the textured surface shortens the reciprocating time of valve core, increasing the flow rate, and speeds up the piston stroke of oil cylinder. The valve core actions much more stable and sensitivity. Meanwhile, combined with the theoretical calculation, the operation mechanism of texturing the pilot valve is analyzed. It is concluded that the stress of textured valve core sealing surface is greater than that of ordinary one, and the pressure difference gradually decreases with the increase of Pin, and the flow difference is basically the same as the force on the sealing surface. This indicates that the textured surface improves lubrication characteristics, reduces the friction between components. The textured valve makes the velocity changes gently, and enhances the responsiveness and stability of the valve. Those related results provide a new idea for enhancing the response design of the pilot valve.

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Fabrication of micro-texture on cylindrical inner surface and its effect on the stability of hybrid bearing

Cited by 15 publications

References 23 publications

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Influence of the distribution position and arrangement of micro-textured on the performance of the hydrostatic bearing

Research on The Controllable Interface Response Enhancement of The Textured Pilot Valve

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