Steady-state thermo-hydrodynamic analysis of cylindrical fluid film journal bearing with an axial groove

Singh, Uday Pratap; Roy, Lintu; Sahu, Mukesh Kumar

doi:10.1016/j.triboint.2008.02.009

Cited by 40 publications

(24 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In one region (full oil), the pressure varies, and in the other region, related to the part in which the cavitation occurs, the pressure is constant. In other words, in the oil whip region, only part of the surfaces are occupied by the fluid, and since air bubbles are present in the oil whip region, the pressure can be assumed to be constant (equal to the oil whip pressure) [28].…”

Section: Fig 1 Simple Schematic Of the Journal Bearing Geometrymentioning

confidence: 99%

Numerical study of the oil whirl phenomenon in a hydrodynamic journal bearing

Hekmat

Biukpour

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The journal bearings are one of the main components of the rotating machines and always bear considerable weight and dynamic stresses. Bearing defect may cause bending and eventually axis fracture and, in some cases, lead to an increase in the temperature of other components. One of the most important challenges of this type of bearings is the instability of the oil film layer, which appears as oil whirl and oil whip. The main objective of this research is the numerical analysis of the journal bearing of a centrifugal pump and the investigation of variations in the eccentricity and the rotation of the bearing to detect the instability resulting from the oil whirl and whip. For this purpose, assuming the steady and laminar flow, the Reynolds theory modified by the Elrod-Adams cavitation model is utilized. In addition, the finite element method is used for the numerical solution. The results indicate that the pressure on the bearing shell increases considering the effect of the oil whip phenomenon. Moreover, by increasing the eccentricity ratio, the pressure applied to the bearing increases and the mass fraction of the oil film decreases. After that, in order to improve the performance, by creating a horizontal groove in a simple bearing (without groove), the oil whirl and whip are numerically analyzed and the effect of the eccentricity as well as the rotational speed of the modified bearing is investigated. Numerical results indicate that the presence of the groove in the bearings causes the pressure on the grooved bearings to decrease dramatically. As a result, the probability of occurrence of the oil instability phenomenon in this case will be less than simple state (no groove). In addition, in this case, it could be observed that as the rotational speed of the grooved bearing increased, the pressure applied around the groove bearing from the oil film increases. However, the pressure applied to the grooved bearings is much less than the pressure applied to the simple bearings.

show abstract

Section: Fig 1 Simple Schematic Of the Journal Bearing Geometrymentioning

confidence: 99%

Numerical study of the oil whirl phenomenon in a hydrodynamic journal bearing

Hekmat

Biukpour

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…In this simulation, the top of the lubrication film is the oil inlet of the bearing (number 1 in Figure 3). The oil inlet pressure can be taken to be constant, 28,[30][31][32] since the steady state analysis is made in the present study. This constant boundary pressure is chosen to be 70 kPa as in literature.…”

Section: Solution Schemementioning

confidence: 99%

Influences of operation parameters on noise of journal bearing with compound texture considering lubricant thermal effect

Meng

Shu

Chen

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Effects of operation parameters on the noise of the compound textured journal bearing are analyzed using computation fluid dynamic method and broadband noise source theory. After a three-dimensional model of the compound textured bearing is established, the lubrication performances of the bearing are compared under the isothermal and thermal situations. Further, the noise performances of the textured and smooth bearings are studied at the varied operation parameter. Numerical results show that appropriately decreasing the eccentricity ratio or rotational speed can reduce the noise of the compound textured bearing. Moreover, there is a critical length–diameter ratio of the bearing for suppressing the noise of the compound textured bearing. A part of the above conclusions is also verified experimentally.

show abstract

“…The analysis developed embraces biplanar journal misalignment of any degree, up to bearing-journal contact. Singh U. et al [17] theoretically performed a steady-state thermohydrodynamic analysis of an axial groove journal bearing in which oil was supplied at constant pressure. Roy L. [18] [24] presented the journal bearings lubrication aspect analysis using non-Newtonian fluids which were described by a power law formula and thermohydrodynamic aspect.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Modified Viscosity-Temperature Equation on Thermohydrodynamic Analysis of Plain Journal Bearing

Kadam¹,

Banwait²,

Laroiya³

2014

AJME

View full text Add to dashboard Cite

In this paper a thermohydrodynamic analysis has been done to investigate the influence of modified viscosity-temperature equation on plain journal bearing. This analysis is based on the numerical solution of threedimensional energy equation coupled with Reynolds equation and the heat conduction equation in the journal bearing. Reynolds equation for the pressure distribution and the energy equation for the temperature distribution were used for this analysis. Finite element method was used to solve the Reynolds equation. By solving the generalized Reynolds equation, hydrodynamic pressure was found out. Finite difference method was used for predicting temperature distribution in journal bearing. The Fourier heat conduction equation in the non-dimensional cylindrical coordinate has been adopted for finding the temperature distribution in the bush. The temperature distribution along axial direction of the journal has been found out using a steady-state unidirectional heat conduction equation.

show abstract

Steady-state thermo-hydrodynamic analysis of cylindrical fluid film journal bearing with an axial groove

Cited by 40 publications

References 9 publications

Numerical study of the oil whirl phenomenon in a hydrodynamic journal bearing

Numerical study of the oil whirl phenomenon in a hydrodynamic journal bearing

Influences of operation parameters on noise of journal bearing with compound texture considering lubricant thermal effect

The Influence of Modified Viscosity-Temperature Equation on Thermohydrodynamic Analysis of Plain Journal Bearing

Contact Info

Product

Resources

About