Stability of tri-taper journal bearings under dynamic load using a non-linear transient method

Rao, D. Srikanth; Shenoy, Bhaskar; Pai, Radha R.

doi:10.1016/j.triboint.2010.02.018

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…Equations (14) and (15) represent the dynamic behavior of the shaft, which follow the fundamental dynamic law. Radial micro-motion of gear shaft can be determined by solving equations (14), and (15) jointly.…”

Section: Theoretical Approachmentioning

confidence: 99%

“…Many works with regard to this have been done over past years. 13–17 Particularly, the transient analysis in the mixed-lubrication regime has become one of the important topics. Raj et al.…”

Section: Introductionmentioning

confidence: 99%

“…Many works with regard to this have been done over past years. [13][14][15][16][17] Particularly, the transient analysis in the mixed-lubrication regime has become one of the important topics. Raj et al 18 proposed a transient analysis to the rough short bearing with Christensen model, using approximate polynomial to describe the rough surface height.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis on the start behavior of rough journal bearings during the gear pump meshing cycle

Zhu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this paper, the transient lubrication characteristics of hydrodynamic journal bearings during the external gear pump meshing cycle are studied. In the bearings lubrication calculation part, a numerical model is developed to assess the transient lubrication during the initial start-up of an aero gear pump. The model takes into account the effects of surface topography, asperities contact, and pump start-up speed. In the pump simulation part, the flow inside pump and bearing load environment are analyzed by a computational fluid dynamics model. Then a simulation method is presented to solve the problem of pump-bearings system, considering the pump’s influence during bearings lubrication calculation. To gain insight, results of a series of simulations with illustrative examples are presented. The variation of the startup lubrication performance under load conditions corresponding to the pump internal flow field is acquired. The results show that bearings operate from mixed-lubrication to hydrodynamic-lubrication state with changed load-supporting effects during the startup. The load-supporting effects and film rupture boundary are directly related to the pump load fluctuation, but the center trace is slightly influenced except on the hydrodynamic-lubrication state.

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Section: Theoretical Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical analysis on the start behavior of rough journal bearings during the gear pump meshing cycle

Zhu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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show abstract

“…Up to date, many studies (Shenoy and Pai, 2010;Mishra, 2013;Guha, 2010) have focused on the effects of different factors on the stability of rotor-bearing systems. The analysis methods of stability mainly include the linearization analysis (Guha, 2010), nonlinearization analysis (Jun et al, 2015;Amamou and Chouchane, 2014;Lin et al, 2014;Kushare and Sharma, 2014;Jovanovi c and Tomovi c, 2014) and basis stiffness and damping coefficient from the motion equation (Papadopoulos et al, 2008;Rao et al, 2014). According to the linear rotor dynamics theory, hydrodynamic force is characterized by eight linear stiffness and damping coefficients (Jovanovi c and Tomovi c, 2014).…”

Section: Introductionmentioning

confidence: 99%

Stability characteristics of lubricating film in mill oil-film bearings

Wang

Mohammadkazem

et al. 2018

ILT

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Purpose The stability characteristics of an oil film directly influence the safety and service life of mill oil-film bearings. However, very limited work has been done to address the stability characteristics of mill oil-film bearings. To this end, this paper aims to investigate the stability characteristics of mill oil-film bearings through theoretical and experimental analysis. Design/methodology/approach For the first time, a special designed experiment platform was developed to investigate the stability characteristics of mill oil-film bearings. In addition, a theoretical model of lubricating film of the tested bearings was established to analyze the oil-film stability. The theoretical results were compared with the experimental results. Findings The comparison results demonstrate that the critical influential factors on the bearing stability were the eccentricity ratio and the ratio of bearing length to diameter. The mill bearing was likely to be unstable under a small load and at a high rotational speed. Practical implications The paper includes implications for suitable operation conditions in practical use of mill oil-film bearings. Originality/value This paper fulfills an identified need to investigate oil-film stability of mill bearings for practical applications.

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A Study on Dynamic Response and Diagnosis Method of the Wear on Connecting Rod Bush

Jiang

Mao

Zhang

et al. 2017

J Fail. Anal. and Preven.

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Stability of tri-taper journal bearings under dynamic load using a non-linear transient method

Cited by 8 publications

References 4 publications

Numerical analysis on the start behavior of rough journal bearings during the gear pump meshing cycle

Numerical analysis on the start behavior of rough journal bearings during the gear pump meshing cycle

Stability characteristics of lubricating film in mill oil-film bearings

A Study on Dynamic Response and Diagnosis Method of the Wear on Connecting Rod Bush

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