Effect of surface texturing on the dynamic characteristics of hydrodynamic journal bearing comprising concepts of green tribology

Matele, Shivank; Pandey, Kavita

doi:10.1177/1350650117752611

Cited by 35 publications

(32 citation statements)

References 16 publications

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“…As can be observed in Figure 10, the partially and fully textured journal bearings have greater orbits compared to the respective smooth journal bearings, due to the texturing effects that tend to increase the oil film thickness inside the bearing. Moreover, modifications in stiffness and damping of the fluid film may possibly occur with insertion of textures in the bearing according to Matele and Pandey, 28 which favors the increase of orbits amplitudes as verified analyzing the results. In current case, a possible reduction in damping occurred.…”

Section: Evaluation Of the Proposed Textured Journal Bearings Under Dsupporting

confidence: 66%

Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery

Ramos

Daniel

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In order to obtain rotating machinery with improved energy efficiency, the approach of surface texturing journal bearings has been adopted to reduce the viscous dissipation in the lubricant. A possible reduction in shear viscous forces in the bearings of rotating machines could reduce the amount of heat released along its operation, resulting in a lower operating temperature that tends to improve journal bearings performance and the machine’s energetic efficiency. Thus, this work aims to investigate the texturing of journal bearings under dynamic loading conditions, considering the application in rotating systems. For this, computational simulations are performed through a rotating system model constructed by means of the finite element method in which the hydrodynamic journal bearings that support the rotor are modeled by Reynolds’ equation using the finite volume method and the full multigrid technique. The numerical results show that textured journal bearings can be applied to rotating machines, providing reductions in shear viscous forces. However, the magnitude of this reduction should be carefully evaluated, as the Reynolds cavitation model was applied to ensure a lower computational spent time and thus enable the simulations involved in this study. The novelty of this study is related to determining the appropriate distributions and geometric parameters of the textures for the journal bearing under dynamic load condition considering its equivalent static load condition what tends to drastically reduce computational time to perform this procedure, representing an important alternative for industrial application.

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Section: Evaluation Of the Proposed Textured Journal Bearings Under Dsupporting

confidence: 66%

Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery

Ramos

Daniel

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…For validation of present results, the dynamic performance parameter i.e. non-dimensional direct damping coefficient (Cxx) and threshold speed are computed and compared with already latest published results obtained by Matele and Pandey 19 has been shown in Table 1. The results show good agreement with the published results.…”

Section: Resultsmentioning

confidence: 99%

Dynamic and stability performance improvement of the hydrodynamic bearing by using triangular-shaped textures

Sharma

Jamwal

Awasthi

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the present study, the effect of triangular shape textured on the bearing dynamic and stability performance has been investigated. The triangular-shaped texture having variation in their depth size, number of textures, and location has been used in the study to find the stiffness, damping, and stability parameters and compared with un-textured bearing. The pressure and fluid-film thickness in the lubricant flow domain having characteristics of Newtonian and isothermal and which is governed with Reynold's equation have been computed by discretizing the domain into four-nodded quadrilateral isoparametric by using finite element method. Four different cases of texture distribution on the bearing surface have been studied. The study has been carried out considering the bearing operation only under average eccentricity ratios of 0.6. From obtained results, it is found that the value of direct stiffness coefficient and threshold speed is found maximum at lower texture depth and the direct damping coefficient is found maximum at higher value of texture depth corresponding to different texture distribution on the bearing surface. The optimum triangular-shaped textured parameters have been also finalized to get maximum dynamic performance and stability, which may be expected to be valuable for bearing designers. For the purpose of a better insight into the stability aspect of the optimal textured journal bearing, the journal center trajectories are also drawn and compared with un-textured bearing.

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“…Wang et al [92], Manser et al [93], and Ramos et al [94] compared the static performance characteristics of textured journal bearing with smooth journal bearing surface. Similarly, Matele et al [95], Jiang et al [96], and Jhoon et al [97] compared dynamic performance characteristics of textured journal bearing with smooth journal bearing surface. The important observations from the comparison study are discussed below: • Maximum pressure is increased for texturing within the converging zone of bearing [82].…”

Section: Journal Bearing With Texturementioning

confidence: 99%

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

et al. 2020

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Numerous published studies on the non-wettable surfaces with surface texture and slip conditions have been reviewed comprehensively to evaluate the performance of hydrodynamic bearings from last two decades. The recent numerical and experimental studies have been explored to observe the individual and combined influence of surface texture and slip. A variety of texture shapes and optimized slip zone profiles have also been discussed in this article. It has been observed from the literature that a suitable combination of modified slip and the conventional no-slip zone is effective in improving dynamic and static performance of hydrodynamic bearings. Many experimental studies also revealed that micro-scale textures are significantly capable of improving the tribological performance. Moreover, slip boundary condition is more beneficial at low and medium eccentricity ratios.

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Effect of surface texturing on the dynamic characteristics of hydrodynamic journal bearing comprising concepts of green tribology

Cited by 35 publications

References 16 publications

Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery

Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery

Dynamic and stability performance improvement of the hydrodynamic bearing by using triangular-shaped textures

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

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