Effect of nanoparticles additives on the performance of an externally adjustable fluid film bearing

Shenoy, Bhaskar; Binu, K G; Rao, D. Srikanth; Pai, Raghuvir

doi:10.1016/j.triboint.2011.10.004

Cited by 90 publications

(64 citation statements)

References 25 publications

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“…Nair et al (2009) has theoretically studied the influence of nanoparticle additives on journal bearings using finite element approach. Shenoy et al (2012) has studied the effects of nanoparticle lubricant additives on the performance of externally adjustable fluid film bearing. The above studies by Nair et al (2009) andShenoy et al (2012), which reports an increase in load carrying capacity and stability of journal bearings using nanoparticle-dispersed lubricant, makes use of the viscosity data reported by Wu et al(2007) for TiO 2 , CuO and nano-diamond dispersions in base oil to compute the bearing characteristics.…”

Section: Introductionmentioning

confidence: 99%

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

Binu

Shenoy

Rao

et al. 2014

Procedia Materials Science

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Influence of TiO 2 nanoparticle lubricant additive on the load carrying capacity of a journal bearing is studied. Increase in lubricant viscosity due to presence of TiO 2 nanoparticles is modelled using a modified Krieger-Dougherty viscosity model. Validity of modified Krieger-Dougherty model in simulating the viscosities of TiO 2 nanoparticle dispersions in engine oil is experimentally verified. The pressure distribution and load carrying capacity are theoretically evaluated using a modified Reynolds equation for various TiO 2 nanoparticle concentrations and aggregate sizes. Results reveal an increase in load carrying capacity of journal bearing using TiO 2 nanoparticle lubricant additive as compared to plain oils without nanoparticle additive.

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Section: Introductionmentioning

confidence: 99%

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

Binu

Shenoy

Rao

et al. 2014

Procedia Materials Science

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“…Besides the simple particle size reduction in conventional solid-state lubricants such as graphite, molybdenum disulfide, or tungsten disulfide to the nanoscale, the use of silicon dioxide [1,2], lanthanum borate [3], zinc oxide [4], copper [5][6][7], calcium carbonate [8], lead sulfide [9], and titanium dioxide [10][11][12] nanoparticles led to remarkable wear and friction properties of lubricating agents. Another interesting approach are fullerenes.…”

Section: Introductionmentioning

confidence: 99%

An Oil-Based Lubrication System Based on Nanoparticular TiO2 with Superior Friction and Wear Properties

et al. 2015

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We evaluated the performance of five different commercially available nanoparticle classes as additives for an oil-based lubrication system. While the silicon dioxide particles Aerosil Ò 300, RY300, and R972V tended to increase wear and friction in our 100Cr6 versus cast iron disc-disc contact, Aeroxide Ò P 25 and especially T 805 TiO 2 nanoparticles showed superior anti-wear and antifriction properties. The underlying tribological mechanism was investigated with optical microscopy, helium ion microscopy, and X-ray photoelectron spectroscopy. Subsequently, we formulated a stable lubrication system based on the best performing T 805 particles. Here, the base oil is a highly purified paraffin oil which was supplemented with 1 wt% T 805 TiO 2 particles, 1 wt% Estisol Ò 242 or 1 wt% oleic acid, 0.15 wt% oleylamine, and 0.15 wt% Pluronic Ò RPE 2520. Superior lubrication and anti-wear properties of this formulation were demonstrated in 4-h test runs with a normal force of F N = 2.5 kN and a sliding velocity of 0.15 m/s in our disc-disc contact. Wear was significantly reduced along with a nearly 12-fold reduction in the friction coefficient, compared to the base oil ðl fto base ¼ 0:155 vs: l fto T805 % 0:01Þ. Using 100Cr6 disc-ball contacts, we additionally analyzed the properties of our lubrication system in the border friction regime under higher loads (F N = 0.5 kN) in 2-h runs. In particular, on the discs with lower engagement ratio, chemo-tribological protective layers were built, which protected the parts very well against wear.

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“…Study [11] presents research on the effect of nanoparticle additives on journal bearings using the finite element method. Study [12] presents investigations on the effects of nanoparticle lubricant additives on the performance of externally adjustable fluid film bearings. The studies described in [11,12] point to an increase in the load-carrying capacity and stability of journal bearings using a nanoparticle-dispersed lubricant, and use the viscosity data reported in [5] for TiO2, CuO and nano-diamond dispersions in base oil to compute the bearing characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Study [12] presents investigations on the effects of nanoparticle lubricant additives on the performance of externally adjustable fluid film bearings. The studies described in [11,12] point to an increase in the load-carrying capacity and stability of journal bearings using a nanoparticle-dispersed lubricant, and use the viscosity data reported in [5] for TiO2, CuO and nano-diamond dispersions in base oil to compute the bearing characteristics. The variation in lubricant viscosity with changes in nanoparticle concentrations and the effect of nanoparticle size and its aggregation properties were omitted during these studies.…”

Section: Introductionmentioning

confidence: 99%

Researches on Tie Rod Ends Lubricated by Grease with TiO₂ and ZrO₂ Nanoparticles

Woźniak

Siczek

Kubiak

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. The nanoparticles of some materials can be used successfully to improve tribological properties through decreasing both wear and friction borne out of contact between the contact surfaces of elements in different devices, particularly vehicles. Nanoparticles of TiO2 and ZrO2 were chosen as additives to the lithium grease lubricating the contact surfaces in tie rod ends. The object of study was the steel ball -the component of the tie rod end -mating with the polymer insert and lubricated with the pure lithium grease or containing the addition of pure TiO2, pure ZrO2 nanoparticles, with a 1%wt. Studies on friction were carried out using the tester allowing cyclical rotational motion and different loading of contact. Wear was investigated by driving a car, whose tie rod ends were analysed, on a fixed 'eight'-shape track and with a fixed velocity pattern. The aim of the study was to obtain the values and waveforms of friction moment and wear versus cycles, loading and composition of lubricating grease. The waveforms of friction coefficient were obtained using the FEM model of the analysed contact zone. Based on the obtained waveforms, recommendations for the composition of additives for lithium grease were made.

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Effect of nanoparticles additives on the performance of an externally adjustable fluid film bearing

Cited by 90 publications

References 25 publications

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

An Oil-Based Lubrication System Based on Nanoparticular TiO2 with Superior Friction and Wear Properties

Researches on Tie Rod Ends Lubricated by Grease with TiO₂ and ZrO₂ Nanoparticles

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Effect of nanoparticles additives on the performance of an externally adjustable fluid film bearing

Cited by 90 publications

References 25 publications

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

A Variable Viscosity Approach for the Evaluation of Load Carrying Capacity of Oil Lubricated Journal Bearing with TiO 2 Nanoparticles as Lubricant Additives

An Oil-Based Lubrication System Based on Nanoparticular TiO2 with Superior Friction and Wear Properties

Researches on Tie Rod Ends Lubricated by Grease with TiO2 and ZrO2 Nanoparticles

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Researches on Tie Rod Ends Lubricated by Grease with TiO₂ and ZrO₂ Nanoparticles