Effects of manufacturing errors on tribological characteristics of 3-D textured micro- thrust bearings

Charitopoulos, Anastassios; Efstathiou, E. E.; Papadopoulos, Christos I.; Nikolakopoulos, Pantelis G.; Kaiktsis, Lambros

doi:10.1016/j.cirpj.2012.12.001

Cited by 16 publications

(9 citation statements)

References 19 publications

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“…Dimofte [15,16] pointed out that the three-wave bearing shows a better load capacity than the three-wave-groove bearing and the three-lobe bearing at any applied load and running regime, but the three-wave bearings are mare sensitive to the direction of the applied load than the other bearings. Charitopoulos et al [17] analyzed the effect of manufacturing errors on the load capacity and friction coefficient of the textured micro-thrust bearings and revealed that the performance of textured micro-thrust bearings could be improved by manufacturing errors. In addition to the shape error, assembly faults will also significantly affect the spindle performance, as angular misalignment deteriorates the pressure distribution between the shaft and the bearing surfaces, and an air bearing with angular misalignment is more sensitive to the dynamic motions of the shaft in the bearing [18].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Influence of Shaft Shape Errors on the Rotation Accuracy of Aerostatic Spindle—Part 1: Modeling

Zhang

Zheng

et al. 2022

Electronics

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In the research on the aerostatic spindle, for quantifying the influence of shaft shape errors on its rotation accuracy, the calculation models of unbalanced air film force (UAFF) and centrifugal inertia force (CIF) are established. Based on the typical shape of the shaft, three composite cylinder models are constructed. The data sources are selected from the cylindricity measurement results of the shaft and substituted into the model for calculation. The results show that, for the shaft in this paper, when the roundness deviation is ≤1.25 μm and the cylindricity deviation is ≤2 μm, the influence of shape errors on the rotation accuracy of the shaft is small enough. The harmonic analysis of the data source shows that the magnitude and stability of the UAFF on the shaft are determined by the actual shape of the shaft’s cylindrical surface, and cannot be inferred only by the value of shape errors.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Influence of Shaft Shape Errors on the Rotation Accuracy of Aerostatic Spindle—Part 1: Modeling

Zhang

Zheng

et al. 2022

Electronics

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“…Rahmani et al [7] used an optimization program to find the best dimensional parameters to increase the pressure-bearing capacity and lubricant flow ratio of the asymmetrically textured slider bearing and reduce the friction coefficient. Charitopoulos et al [8] found that textures of different shapes and sizes show different Li et al Chinese Journal of Mechanical Engineering (2022) 35 :30 improvements on the friction resistance of friction surfaces. Andersson et al [9] found that the texture with low density and large depth-to-diameter ratio combined with high viscosity lubricating oil can increase the anti-friction properties.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Yang

et al. 2022

Chin. J. Mech. Eng.

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The research on surface texture is developing from single macro-texture to composite micro-nano texture. The current research on the anti-friction mechanism and theoretical models of textures is relatively weak. Studying the characteristics of different types of surface textures and determining the applicable working conditions of each texture is the focus of current research. In this paper, a mathematical model of hydrodynamic lubrication is established based on Navier–Stokes equations. The FLUENT software is used to simulate and analyze the four texture models, explore the dynamic pressure lubrication characteristics of different texture types, and provide data support for texture optimization. The key variable values required by the mathematical model are obtained through the simulation data. The friction coefficient of the texture under different working conditions was measured through friction and wear experiments, and the mathematical model was verified by the experimental results. The research results show that circular texture is suitable for low to medium speed and high load conditions, chevron texture is suitable for medium to high speed and medium to high load conditions, groove texture is suitable for high speed and low load conditions, and composite texture is suitable for high speed and medium to high load conditions. Comparing the experimental results with the results obtained by the mathematical model, it is found that the two are basically the same in the ranking of the anti-friction performance of different textures, and there is an error of 10%−40% in the friction coefficient value. In this study, a mathematical model of hydrodynamic lubrication was proposed, and the solution method of the optimal surface texture model was determined.

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“…14–16 At present, surface texture technology has been extensively concerned and studied. It has been widely used in piston ring-cylinder liners, 17–19 mechanical seals, 20,21 sliding bearings, 22,23 molds, 24 tools, 25–28 and other fields. Compared with other surface treatment technologies, laser surface texture has the advantages of simple process and equipment, low costs, and can be carried out in an atmospheric environment.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of surface texture on tribological properties of nanodiamond films under water lubrication

Yan

Lei

Yang

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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The effect of nanoscale surface texture on the frictional and wear performances of nanocrystalline diamond films under water-lubricating conditions were comparatively investigated using a reciprocating ball-on-flat tribometer. Although the untreated nanocrystalline diamond film shows a stable frictional state with an average friction coefficient of 0.26, the subsequent textured films show a beneficial effect on rapidly reducing the friction coefficient, which decreased to a stable value of 0.1. Furthermore, compared with the nanocrystalline diamond coating, the textured films showed a large decreasing rate of the corresponding ball wear rate from 4.16 × 10−3 to 1.15 × 10−3 mm3/N/m. This is due to the fact that the hydrodynamic fluid film composed of water and debris can provide a good lubrication environment, so the entire friction process has reached the state of fluid lubrication. Meanwhile, the surface texture can greatly improve the hydrophilicity of the diamond films, and as the texture density increases, the water contact angle decreases from 94.75° of the nanocrystalline diamond film to 78.5° of the textured films. The proper textured diamond film (NCD90) exhibits superior tribological properties among all tested diamond films, such as short run-in period, low coefficient of friction, and wear rate.

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Effects of manufacturing errors on tribological characteristics of 3-D textured micro- thrust bearings

Cited by 16 publications

References 19 publications

Evaluation of the Influence of Shaft Shape Errors on the Rotation Accuracy of Aerostatic Spindle—Part 1: Modeling

Evaluation of the Influence of Shaft Shape Errors on the Rotation Accuracy of Aerostatic Spindle—Part 1: Modeling

Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

Experimental study on the effect of surface texture on tribological properties of nanodiamond films under water lubrication

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