Performance behaviour of elliptical-bore journal bearings lubricated with solid granular particulates

Rahmani, Faisal; Dutt, J.K.; Pandey, R. K.

doi:10.1016/j.partic.2015.12.009

Cited by 19 publications

(24 citation statements)

References 23 publications

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“…circular journal bearing case), L/D ratio 0.58 and particle diameter 1 µm was compared with the results of Rahmani et al. 21 The results obtained were found to be in good agreement as depicted in Figure 4. Hence, further study of the static performance of the three-lobed bearing was carried out.…”

Section: Resultssupporting

confidence: 57%

“…Equations are solved for the short three-lobe bearing (L/D = 0.58) having zero ellipticity ratio (circular journal bearing case) and the results were compared with those of Rahmani et al. 21 The results were found to be in good agreement with the model proposed. Hence the study was extended to three-lobed journal bearing with L/D ratio 0.58 and 1.…”

Section: Methodsmentioning

confidence: 61%

“…Hence, the initial study of granular lubrication on non-circular bearings for determining the static as well as dynamic performance was done by Rahmani et al. 21 They investigated the performance of elliptical journal bearing lubricated with solid granular particles of sizes 1 µm and 2 µm for various bore ellipticity values. In view of these investigations, the present work analyses the performance of a symmetric three-lobed bearing lubricated with powdered particles of sizes 1 µm and 2 µm by solving the flow equations numerically.…”

Section: Introductionmentioning

confidence: 99%

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Static and dynamic performance characteristics of powder lubricated symmetrical three-lobed bearing

Jose

Behera

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Hydrodynamic oil bearings applied at elevated temperatures and extreme operating conditions are subjected to the problem of oil degradation. In order to overcome such conditions, dry powder lubricants are used as lubricants in the hydrodynamic journal bearings. Thus the problem of thermal degradation of oil at high temperatures can be eliminated. In this work, the static and dynamic characteristics of a symmetric three-lobed bearing lubricated with powdered particles have been predicted. Influence of the ellipticity ratio on the performance of the three-lobed bearing has also been investigated. It is observed that an increase in the ellipticity ratio increases the coefficient of friction and stability, but decreases the side leakage and the load carrying capacity of the three-lobed bearing. Also, it was observed that the large-sized powdered particles induce better load carrying capacity and better stability than the small-sized particles.

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Section: Resultssupporting

confidence: 57%

Section: Methodsmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

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Static and dynamic performance characteristics of powder lubricated symmetrical three-lobed bearing

Jose

Behera

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…explored the performance of elliptical bearings by the metallic fine-grained lubricant. 15 Singla and Chauhan experimentally studied oil film pressure and temperature of an elliptical journal bearing, and they experimentally showed pressure and temperature profile with different load and speed. 16 Suryawanshi and Pattiwar studied the effect of blending TiO2 nanoparticles with lubricating oil on the performance parameters of the elliptical journal bearing and plain bearing.…”

Section: Introductionmentioning

confidence: 99%

Geometrical analysis of elliptical journal bearings and its effects on friction and load capacity

Ebrahimi

Akbarzadeh

Moosavi

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Elliptical bearings are one type of non-circular journal bearings which has two main advantages over the conventional circular bearings: lower temperature rise and lower vibrations. In this study, the energy equation and Reynolds equation are simultaneously solved under adiabatic boundary conditions. The predicted pressure and temperature are compared to the results of published literature for verification purposes. A parametric study is then conducted on the effect of geometrical parameters of the elliptical journal bearing on the load capacity, friction force, pressure, and oil temperature. Effect of geometric parameters of the bearing on the performance is studied. The results show that non-circularity parameter is the most influential parameter in the bearing, and an increase in the non-circularity results in the decrease in maximum pressure and temperature as well as the friction force. Increasing the eccentricity ratio, on the other hand, will cause an increase in the pressure, temperature, and the friction force. Changes in the angle between the major axis of the bearing and load direction decrease the load-carrying capacity and the non-dimensional pressure and results in an increase in the friction coefficient.

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“…The viscosity of the lubricant has a great influence on the quality of the lubrication of the bearing and thereby its durability (Wang and Lu 2015). Apart from the usual lubricating oils, lubricants based on oils containing granular particles can also contribute to increasing the efficiency of the sliding bearings (Rahmani and Jayanta 2016).…”

Section: Introductionmentioning

confidence: 99%

Impact of Geometry Parameters of a Sliding Surface of a Bearing on Tribological Characteristics of Sliding Bearings

Michalak

2018

Iran J Sci Technol Trans Mech Eng

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One of the characteristic parameters which is important for functioning of a journal bearing is relative clearance which has a direct impact on the bearing performance during an initial run-in period and standard operation. An equally important aspect is the proper selection of journal and bearing materials, as it ensures their proper cooperation, i.e., possibly low coefficient of friction, low resistance to motion and minimal wear. Another important issue is the geometry of the working surface of the bearing, i.e., giving it a proper shape by the use of lubricating microgrooves (micro-channels) which support the formation of an oil film. Forming a sliding surface in such a manner contributes to a better cooperation between the journal and the bearing. The paper presents the results of tribological tests, specifically the impact of the use of two types of lubricating microgrooves, made on the internal surface of the bearing on tribological characteristics. The tests were conducted for journal bearings composed of the bearing coated with casted SnSb12Cu6Pb alloy and the steel journal. During the tests, the friction torque, bearing temperature and voltage drop on the internal resistance of oil film were registered. As a result of the investigation, it was noticed that the use of rounded lubricating microgrooves has a positive effect on the tribological characteristics and can contribute to increasing the load-bearing capacity and durability of the journal bearings.Iran J Sci Technol Trans Mech Eng (2019) 43 (Suppl 1):S595-S602 https://doi.org/10.1007/s40997-018-0181-x( 012 3456789(). ,-volV) (0123456789().,-volV)

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Performance behaviour of elliptical-bore journal bearings lubricated with solid granular particulates

Cited by 19 publications

References 23 publications

Static and dynamic performance characteristics of powder lubricated symmetrical three-lobed bearing

Static and dynamic performance characteristics of powder lubricated symmetrical three-lobed bearing

Geometrical analysis of elliptical journal bearings and its effects on friction and load capacity

Impact of Geometry Parameters of a Sliding Surface of a Bearing on Tribological Characteristics of Sliding Bearings

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