A Method of Influence Functions for Thermal Analyses of Tribological Elements

Shi, Fanghui; Wang, Qian

doi:10.1080/10402009808983758

Cited by 11 publications

(4 citation statements)

References 13 publications

(7 reference statements)

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“…To assess the asperity contact pressure occurring at the bearing-bush interface, the elastic-plastic contact model developed by Kogut and Etsion (2003) is used in this study. In addition, the elastic deformation driven by the hydrodynamic and contact pressure is calculated with influence function method established by Shi and Wang (1998). Actually, in the authors' previous study (Xiang et al, 2019a(Xiang et al, , 2019b(Xiang et al, , 2019c(Xiang et al, , 2019d, the influence function method has successfully been used to calculate the elastic deformation of oil-lubricated coupled bearing.…”

Section: Thrust Bearingmentioning

confidence: 99%

Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication

Dai

Xiang

Wang

et al. 2022

ILT

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Purpose The purpose of this study is to numerically investigate the time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing (MJTCB) under nonlinear excitation. Design/methodology/approach A three degree of freedom (3-DOF) dynamic model of the rotor coupling with the transient mixed lubrication behavior is established. Based on numerical predictions, the role of the microgroove on the time-varying mixed lubrication performance of MJTCB is identified. The effects of the microgroove depth, microgroove shape and external load on the time-varying mixed lubrication performance of MJTCB are also studied. Findings Numerical results show that the effect of the coupling hydrodynamic on the time-varying mixed lubrication performance of the coupled bearing is strengthen with the increasing of microgroove depth. Furthermore, it is found that the optimal microgroove shape for the thrust bearing, arc or rectangle, highly depends on the microgroove depth. Finally, the contact performance of the thrust bearing is slightly affected by the radial external load. Originality/value This study is expected to achieve a better understanding of the time-varying mixed lubrication performance of MJTCB under nonlinear excitations.

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Section: Thrust Bearingmentioning

confidence: 99%

Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication

Dai

Xiang

Wang

et al. 2022

ILT

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“…The film thickness of the thrust bearing was described by: where h g is the geometry clearance of the thrust bearing [shown in Figure 1(c)], with h g = h p + h g = h p + α t r sin(β − θ) , where h p is the geometry film thickness, α t and β are the inclined angle and pad angle of the thrust pad, respectively [as shown in Figure 1(c)]; h groove and δ ET are the groove depth and elastic deformation of the thrust bearing, respectively; The influence coefficient method presented by Shi and Wang (1998) was applied to calculate the elastic deformation of the coupled bearing. It is noteworthy that the same mesh was applied to calculate the Reynolds equation and the elastic deformation in the presented study.…”

Section: Mathematical Modelmentioning

confidence: 99%

A numerical method to investigate the mixed lubrication performances of journal-thrust coupled bearings

Xiang

Han

Chen

et al. 2019

ILT

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Purpose This paper aims to present a numerical model to investigate the mixed lubrication performances of journal-thrust coupled bearings (or coupled bearings). Design/methodology/approach The coupled hydrodynamic effect (or coupled effect) between the journal and the thrust bearing is considered by ensuring the continuity of the hydrodynamic pressure and the flow field at the common boundary. The mixed lubrication performances of the coupled bearing are comparatively studied for the cases of considering and not considering coupled effect. Findings The simulated results show that the hydrodynamic pressure distributions for both the journal and thrust bearing are modified due to the coupled effect. The decreased load capacity of the journal bearing and the increased load capacity of the thrust bearing can be observed when the coupled effect is considered. And the coupled effect can facilitate in reducing the asperity contact load for both the journal and thrust bearing. Additionally, the interaction between the mixed lubrication behaviors, especially for the friction coefficient, of the journal and the thrust bearing is significant in the elastohydrodynamic lubrication regime, while it becomes weak in the mixed lubrication regime. Originality/value The developed model can reveal the mutual effects of the mixed lubrication behavior between the journal and the thrust bearing.

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“…The product a J DT J r J is the clearance change while 1 þ e cosðy J À jÞ is the adjustment at a different circumferential location when e is given. The bearing thermal deformation, journal and bearing elastic deformations are calculated using the influence-function methods described by Shi and Wang [17,18]. It should be pointed out that, in the case of a deformable cantilever shaft, the shaft deflection might also modify the film thickness because the shaft deflection may be of the same order of magnitude as the bearing surface deformation.…”

Section: Thermoelastic Deformation Submodelmentioning

confidence: 99%

Thermal validation of a misaligned grease-lubricated journal bearing model

Dick

Lin

Wang

et al. 2004

Proceedings of the Institution of Mechanical Engineers, Part J:

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Bearing temperatures predicted by a misaligned grease-lubricated journal bearing simulation were compared with experimental data. The numerical simulation combines a steady state mixed thermo-elastohydrodynamic lubrication model with a semiempirical soap-thickened grease rheology model. Circumferential temperature profiles were measured using a test fixture and journal test specimens of 5.1 cm diameter and 1.9 cm wide over a range of bearing loads (3.8-30 kN) and angular misalignments (from À 0.08 8 to 0.058) at 166 r/min rotational speed. The results show that the maximum temperatures in the numerical and experimental profile agree within 5 per cent over the range of loads and misalignments studied.

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A Method of Influence Functions for Thermal Analyses of Tribological Elements

Cited by 11 publications

References 13 publications

Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication

Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication

A numerical method to investigate the mixed lubrication performances of journal-thrust coupled bearings

Thermal validation of a misaligned grease-lubricated journal bearing model

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