Temperature profile of an elliptic bore journal bearing

Mishra, Prakash Chandra; Pandey, R. K.; Athre, K.

doi:10.1016/j.triboint.2006.04.009

Cited by 33 publications

(23 citation statements)

References 9 publications

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“…Flow rate is 6.8 l/min for oil 1, 7.3 l/min for Oil 2, and 9.0 l/min for oil 3 at 3000 rpm and 100 N, and is 8.8 l/min for oil 1, 8.9 l/min for oil 2, and 11.3 l/min for oil 3 at 4000 rpm and 600 N. Flow rate for oil 3 is large at high speeds and loads as its viscosity decreases sharply with temperature in comparison to the other grade oils considered. 4. It has been observed that the nature/trend of oil film temperature distribution along the circumference of bearing is very close to the oil film temperature distribution obtained by the theoretical model developed by Chauhan et al [6] as shown in Fig.…”

Section: Resultssupporting

confidence: 78%

“…The prediction of temperature by the authors is based on a two-dimensional treatment following Mc Callion's approach (an approach in which the Reynolds and energy equations in oil film are decoupled by neglecting all pressure terms in the energy equation). Mishra et al [4] considered the non-circularity in bearing bore to be elliptical and made a comparison with the circular case to analyse the effect of irregularity. It was observed that with increasing non-circularity the pressure gets reduced and temperature rise is less in case of journal bearing with higher non-circularity value.…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Investigation of Oil Film Temperatures in Elliptical Profile Journal Bearing

2013

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Hydrodynamic journal bearings experience significant variation in oil film temperature. Reliable data of operating temperatures in these journal bearings are very useful and important for practical bearing designers and mathematical modellers. Here, an elliptical journal bearing has been tested to access the temperature rise at oil-bush interface with three grade oils at loads varying from 100 N to 600 N and speeds = 3000, 3500, 4000 rpm at constant oil supply pressure. The results show that with increase in load at constant speed and pressure, and with increase in speed at constant load and pressure, the oil film temperature increases in the central plane of both the lobes of the bearing for all grade oils under study. Further, it is observed that under the given operating conditions, oil 2 gives the coolest operation of the elliptical bearing under analysis.

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Section: Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of Oil Film Temperatures in Elliptical Profile Journal Bearing

2013

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“…Non-circular journal bearings can assume various geometries: elliptical [20][21][22][23] offset halves [24] and three-lobe configuration [25,26] are the most common geometries. Paper [27] shows a comparative analysis of three types of hydrodynamic journal bearing configurations namely, circular, axial groove, and offsethalves.…”

Section: The Mesoscopic Spindlementioning

confidence: 99%

High Speed Rotors on Gas Bearings: Design and Experimental Characterization

Belforte¹,

Colombo²,

Raparelli³

et al. 2013

Tribology in Engineering

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“…By analyzing the Reynolds equation with energy and heat transfer equations, they investigated the steady-state performance of hydrodynamic journal bearings. Mishra et al [9] examined the effect of temperature on elliptical journal bearing and compared the results with similar circular bearings. Their evaluation suggested that the effect of temperature variation on the performance of elliptical bearings is decreased by increasing the non-circularity of bearing; this occurred due to the simultaneous weakening of the amount of pressure created in the lubricant film inside the bearing.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nanoparticle Enhanced Lubricant Films in Thermal Design of Plain Journal Bearings at High Reynolds Numbers

et al. 2019

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Performance investigation of oil journal bearings is of particular importance given the growing use of them as a support for rotary components in a wide range of industrial machines. Frictional forces and shear stresses, which are proportionate to the velocity of lubricating layers at different points in the bearing space, provide the basis for changing temperature conditions. Various factors such as rotational velocity increase, slip width reduction, and small heat transfer coefficient of lubricant cause intensification of lubricant temperature changes. In the present study, with using computational fluid dynamic (CFD) thermohydrodynamic (THD) numerical simulations, the effect of nanoparticles on the performance features of plain journal bearings is evaluated. Particularly, 3D simulation of a journal bearing is implemented using CFD which considerably improves the accuracy of results, coupled with conjugate heat transfer model for metal parts of bearings. Reynolds equation model is used to calculate the oil-film pressure developed in hydrodynamic journal bearings by applying the nano-based lubricants. The configuration of thrust bearing consists of six pads in this study. In order to reduce the modeling complexity and computational cost and because of the symmetrical geometry of the pads, simulation of a single pad is considered instead of the entire domain. In this study, TiO2 nanoparticle with different volume fraction percentages are used. The parameters that are changed to evaluate the performance of the bearing include volume fraction percentage of the nanoparticle, type of lubricant, and rotational speed. Based on the results, for all different lubricant types, the dissipation power, average shear stress, and temperature rise are increased with augmenting the rotational speed. By increasing the rotational speed from 500 to 1500 rpm, the average shear stress increases by more than 100%, 120%, and 130% for DTE 26, DTE 25, and DTE 24 lubricant types, respectively. Moreover, by increasing the rotational speed from 500 to 1500 rpm, the dissipation power, and temperature rise are increased around 600% and 800%, respectively. Furthermore, increasing nanoparticles volume fraction from 0% to 10%, increases all parameters by approximately 10% for all lubricant types and in all rotational speeds.

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Temperature profile of an elliptic bore journal bearing

Cited by 33 publications

References 9 publications

An Experimental Investigation of Oil Film Temperatures in Elliptical Profile Journal Bearing

An Experimental Investigation of Oil Film Temperatures in Elliptical Profile Journal Bearing

High Speed Rotors on Gas Bearings: Design and Experimental Characterization

Effects of Nanoparticle Enhanced Lubricant Films in Thermal Design of Plain Journal Bearings at High Reynolds Numbers

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