Non-Newtonian lubrication of hybrid multi-recess spherical journal bearings with different geometric shapes of recess

Tomar, Adesh Kumar; Sharma, Satish C.

doi:10.1016/j.triboint.2022.107579

Cited by 11 publications

(6 citation statements)

References 46 publications

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“…They reported that a rectangular recess allows a higher average load carrying capacity of the bearings than a spherical recess (figure 4). Tomar and Sharma [39] compared the performances of spherical journal bearings with different recess shapes. They found that a circular recess maximizes the performance, delivering the largest stiffness coefficients and largest damping coefficients.…”

Section: Passive Performance Improvement Strategiesmentioning

confidence: 99%

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Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

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Fluid lubricated bearings have been widely adopted for supporting components of high-end equipments in the field of metrology, semi-conductor, aviation, strategic defense, ultra-precision manufacturing, medical treatment and power generations. These fields all involve extreme working conditions such as ultra-high moving precision, ultra-high rotation speed, ultra-heavy bearing load, ultra-high environmental temperature, high radiation and high vacuum, which present challenges for the design and optimization of reliable fluid lubricated bearings. Breakthrough of any related bottlenecks will promote the development course of high-end equipments. To further promote the advancement of high-end equipments, this paper reviews the design and optimization of fluid lubricated bearings operated with typical extreme working performances. Targeting on the realization of extreme working perfor mances, the current challenges, the current solutions, the underlying deficiencies and the promising developing directions regarding to the design and optimization of fluid lubricat ed bearings are systematically pointed out. This paper can provide guidance for choosing suitable fluid lubricated bearings and optimizing their structures based on required extremeworking performances.

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Section: Passive Performance Improvement Strategiesmentioning

confidence: 99%

mentioning

confidence: 99%

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Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

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show abstract

“…Chien SY proposed the detailed derivation of the Reynolds equation and its corresponding energy equation for the three-dimensional, stable, laminar and compressible flow of single-phase Navi-Stokes fluid in thrust bearings [9]. Tomar AK numerically analyzed the synergistic effect of groove geometry and lubricant nonlinear behavior on 4-cavity spherical radial bearing [10]. Dong investigated the internal flow characteristics of a lobe hydrogen pump for FCV under different rotational speeds by experiments and computational fluid dynamics (CFD).…”

Section: Introductionmentioning

confidence: 99%

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Feng

Jiang

et al. 2023

Preprint

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The dynamic pressure effect of the clearance oil film of stepped hydrostatic thrust bearing is studied by taking the double rectangular cavity oil cushion as an example. According to the hydrodynamics theory, the average dynamic pressure of lubricating oil film in different clearance height regions is theoretically deduced and calculated, and the dynamic pressure effect of the clearance oil film in the stepped hydrostatic thrust bearing is studied through the combination of theoretical calculation, simulation, and experimental verification. It is found that the theoretical value of the average dynamic pressure of the clearance oil film and the rotational speed show a linear growth relationship with a slope of 275.2. The simulated value of the average dynamic pressure and the rotational speed follow the growth law of the Fourier 1 model. The experimental value of the average dynamic pressure is between the theoretical value and the simulated value, which is basically not affected by the load. In the speed range of 0r/min-200r/min, compared with the viscosity of lubricating oil, the speed is the main factor affecting the dynamic pressure of the oil film of the stepped hydrostatic thrust bearing. The dynamic pressure value of the clearance oil film increases in a stepped fashion along the radial direction of the double rectangular cavity oil cushion. The dynamic pressure value has an obvious upward trend at the junction of the circumferential right oil cavity and the sealing edge and then decreases to 0 after reaching the peak value.

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“…An interesting review was presented by Dang et al [31], who revealed that non-Newtonian lubricants demonstrated improved journal bearing performance when compared to Newtonian lubricants operating under specific conditions. In a recent publication, Tomar and Sharma [32], using the cubic shear stress law model, investigated the influence of a non-Newtonian lubricant on the hybrid multi-recess spherical journal bearings. They found that the interaction between recess shapes and nonlinear factors has a substantial impact on bearing performance.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Newtonian and Non-Newtonian Fluid on a Heterogeneous Slip/No-Slip Journal Bearing System Based on CFD-FSI Method

Tauviqirrahman

Jamari

Susilowati

et al. 2022

Fluids

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It is a well-known fact that incorporating a slip boundary into the contact surfaces improves bearing performance significantly. Regrettably, no research into the effect of slip on the behavior of journal bearing systems operating with non-Newtonian lubricants has been conducted thus far. The main purpose of this work is to explore the performance comparison of Newtonian and non-Newtonian fluid on a heterogeneous slip/no-slip journal bearing system. The tribological and acoustic behavior of journal bearing is investigated in this study using a rigorous program that combines CFD (computational fluid dynamics) and two-way FSI (fluid–structure interaction) procedures to simulate Newtonian vs. non-Newtonian conditions with and without slip boundary. The numerical results indicate that irrespective of the lubricant type (i.e., Newtonian or non-Newtonian), an engineered heterogeneous slip/no-slip pattern leads to the improvement of the bearing performance (i.e., increased load-carrying capacity, reduced coefficient of friction, and decreased noise) compared to conventional journal bearing. Furthermore, the influence of the eccentricity ratio is discussed, which confirms that the slip beneficial effect becomes stronger as the eccentricity ratio decreases. It has also been noticed that the Newtonian lubricant is preferable for improving tribological performance, whereas non-Newtonian fluid is recommended for lowering bearing noise.

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Non-Newtonian lubrication of hybrid multi-recess spherical journal bearings with different geometric shapes of recess

Cited by 11 publications

References 46 publications

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing

Performance Comparison of Newtonian and Non-Newtonian Fluid on a Heterogeneous Slip/No-Slip Journal Bearing System Based on CFD-FSI Method

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