Investigation of the Effect of Milli-Scale Dimples on Planar Contact Lubrication

Wang, Jiadao; Chen, Haosheng; Han, Zhongling; Chen, Darong

doi:10.1080/10402000903402652

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…30,31 It may create significant improvement in the pressure distribution due to increase in bearing clearance and may enhance the load support. 1,18,[31][32][33] The friction is dominated by the induced bearing clearance, and hence, the textured surfaces produce less frictional torque. Another important fact may be textured surfaces are having relatively lower contact area as compared to untextured surface that lead to reduction in friction arising out of runner rotation.…”

Section: Resultsmentioning

confidence: 99%

“…Further, Wang et al. 18 proposed an in-depth study on the influence of dimple shape, distribution pattern, surface roughness and dimple depth on the hydrodynamic lubrication of a reciprocating test-rig. In the same year, Dobrica et al.…”

Section: Introductionmentioning

confidence: 99%

“…Following this study, Ma et al 17 utilized numerical technique to explore the frictional characteristics of elliptical shape texture with various depth, aspect ratio and dimple diameter under hydrodynamic lubrication condition. Further, Wang et al 18 proposed an in-depth study on the influence of dimple shape, distribution pattern, surface roughness and dimple depth on the hydrodynamic lubrication of a reciprocating test-rig. In the same year, Dobrica et al 19 studied the influence of texture height, texture extent and the aspect ratio on the tribological characteristics of parallel sliding lubricated contact, where dimple density is seen to have a significant influence on the hydrodynamic performance.…”

Section: Introductionmentioning

confidence: 99%

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Tribological performance of positive deterministic textured surfaces in parallel sliding lubricated contacts: Effect of texture size and height

Panigrahi

Sarangi

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Recent studies in tribology show that deterministic surface texture enhances the tribological performance of parallel sliding lubricated contacts in terms of reduction in friction and an increase in load carrying capacity. This paper presents an experimental study to assess the effect of texture size and height on hydrodynamic performance of parallel sliding thrust bearing. Positive deterministic textures of different size and height with circular, elliptical, square and triangular cross-sections are fabricated for investigation. The experiments are performed using an in-house developed thrust bearing apparatus with constant flow lubrication system. The most important finding is that all the textured surfaces produce lower frictional torque and higher bearing clearance as compared to the untextured surface under varying load and speed. From the test results, it is found that with same texture height, specimens having small texture size perform better tribological characteristics followed by medium and large size textures. Furthermore, it is reported that with same texture size, a higher value of texture height is promising better hydrodynamic performance for all shapes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tribological performance of positive deterministic textured surfaces in parallel sliding lubricated contacts: Effect of texture size and height

Panigrahi

Sarangi

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Surface textures are common on bearings [ 7 , 8 ], rings and seals [ 9 , 10 , 11 ], and implants [ 12 ]. The dimple texture is one such surface texture which has shown a significant decrease in the friction in the context of various lubrication regimes when manufactured using lasers [ 13 , 14 , 15 , 16 ]. Bhaduri et al [ 17 ] tested laser-machined micro-dimple-textured surfaces with a ball-on-disc reciprocating tribometer and reported the third-body entrapment capability of the dimples.…”

Section: Introductionmentioning

confidence: 99%

Tribological Investigation of Textured Surfaces in Starved Lubrication Conditions

et al. 2022

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The present work investigates the friction reduction capability of two types of micro-textures (grooves and dimples) created on steel surfaces using a vertical milling machine. The wear studies were conducted using a pin-on-disc tribometer, with the results indicating a better friction reduction capacity in the case of the dimple texture as compared to the grooved texture. The microscopic images of the pin surface revealed deep furrows and significant damage on the pin surfaces of the groove-textured disc. An optimization of the textured surfaces was performed using an artificial neural network (ANN) model, predicting the influence of the surface texture as a function of the load, depth of cut and distance between the micro-textures.

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“…It has been shown that with proper shape and dimensions as well as having optimized area density of oil pockets, the friction characteristics of the sliding pairs could be improved in comparison to smooth surface cases. Wang et al [15] investigated experimentally the effect of dimple depth and dimple shape on the drag force. It has been reported based on their study that the dimple shape and distribution had little effect on the drag reduction.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

Kango¹,

Sharma²,

Sharma³

et al. 2022

Tribol. Ind.

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Experimental work provides a greater insight into the performances of journal bearings under actual operating conditions. Moreover, experimental findings also provide a platform for validation of numerical model based results and helps to point out suggestions needed to pursue further research. This article has been written in the direction of providing few factual experimental observations using the fabricated bush bearings having conventional, full textured (0⁰ to 360⁰) and half textured (0⁰ to 180⁰ and 180⁰ to 360⁰) bores. The textured bores involving cylindrical dimples were fabricated using electric discharge machining (EDM). Experiments were conducted at two loads (load per unit projected area = 0.3 and 1.5 MPa) and two journal speeds (2 and 5 m/s) employing SAE-30 lubricating oil. The experimental results revealed that the bearing with textures lying in the converging zone (0⁰ to 180⁰) yielded maximum reduction in coefficient of friction as compared to conventional (smooth) and other textured cases considered herein. Temperature rise with this textured bearing (0⁰ to 180⁰) also found less among all the textured bore cases.

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Investigation of the Effect of Milli-Scale Dimples on Planar Contact Lubrication

Cited by 6 publications

References 22 publications

Tribological performance of positive deterministic textured surfaces in parallel sliding lubricated contacts: Effect of texture size and height

Tribological performance of positive deterministic textured surfaces in parallel sliding lubricated contacts: Effect of texture size and height

Tribological Investigation of Textured Surfaces in Starved Lubrication Conditions

Experimental Investigations on Temperature and Frictional Behaviors of Textured Journal Bearings

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