The role of lubricant feeding conditions on the performance improvement and friction reduction of journal bearings

Brito, F. P.; Miranda, A. S.; Claro, José Carlos Pimenta; Teixeira, José Carlos; Costa, Lucrécio; Fillon, Michel

doi:10.1016/j.triboint.2013.11.016

Cited by 37 publications

(42 citation statements)

References 36 publications

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“…The bearing analysis tools is the same as the one already described in previous works [16] [20]. Therefore, only a brief outline of the model is now provided.…”

Section: Theoretical Model Outlinementioning

confidence: 99%

Analysis of the effect of grooves in single and twin axial groove journal bearings under varying load direction

Brito

Miranda

Fillon

2016

Tribology International

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Multi axial groove hydrodynamic journal bearings are often preferred over single grooved ones to improve lubricant distribution. However, when assessing the influence of loading angle for a twin axial groove bearing, the authors detected the occurrence of phenomena such as strong negative flow rate in one of the grooves for a broad range of loading angles which was deleterious to bearing performance. Conversely, single groove bearings display acute starvation for specific loading ranges. The authors use a previously proposed thermohydrodynamic approach to compare the role of single and twin groove bearings under variable loading direction. Results show that a groove deactivation strategy (using check valves) might be a best-of-both-worlds strategy, optimizing groove flow rate distribution, reducing temperature and eccentricity levels.

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“…The bearing analysis tools is the same as the one already described in previous works [16] [20]. Therefore, only a brief outline of the model is now provided.…”

Section: Theoretical Model Outlinementioning

confidence: 99%

Analysis of the effect of grooves in single and twin axial groove journal bearings under varying load direction

Brito

Miranda

Fillon

2016

Tribology International

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“…This mixing model, sketched in Figure 5(b), has already been detailed in a recent publication. 3 It relates the feeding temperature, the inner temperature of the groove, "…”

Section: Thermal Modelmentioning

confidence: 99%

Thermohydrodynamic modelling of journal bearings under varying load angle and negative groove flow rate

Brito

Miranda

Claro

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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The performance of hydrodynamic journal bearings is affected by the conditions under which the lubricant is fed to the bearing gap. Axial grooves are often used and, depending on their location relatively to the load line, they might substantially interfere with the hydrodynamic pressure generation and the thermal behaviour of the bearing. However, many of the existing tools for predicting bearing performance are not able to suitably predict bearing behaviour under varying load angle given the oversimplified way under which they treat lubricant feeding conditions. The present work proposes a detailed thermohydrodynamic approach which realistically incorporates these conditions into the bearing analysis. Special care is put on the mass and energy-conserving models of the ruptured film region and on a detailed treatment of lubricant mixing within the vicinity of grooves. This includes the first full modelling of the effect of negative flow rate in a groove, a phenomenon originally described experimentally in detail by the authors in previous publications, and which happens for a broad range of load/groove angles. An extensive investigation on the influence of loading direction on the performance of twin groove journal bearings has been performed. This parameter is found to affect deeply all major performance parameters due to the interference of groove regions in the hydrodynamic pressure generation and in the flow rates at each groove.

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“…And the effects of lubricant feeding pressure and temperature on bearing performance have been analyzed. 17 In fact, the above researches have carried out a series of valuable theoretical and experimental works on these journal bearings. However, the experimental studies focused on the industrial application of hydrodynamic journal bearing reported in the literature are scarce, especially in the monitoring of HLFCs.…”

Section: Introductionmentioning

confidence: 99%

A Method of Feeding Conditions Monitoring of Journal Bearing in Tandem Cold Mill

Sun

Cao

Yao

et al. 2016

Measurement and Control

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This paper presents a real-time hydrodynamic lubricant feeding conditions monitoring system for journal bearing in tandem cold mill to avoid online burning accident. A new kind of sensor connector has been developed to perform as a measuring section applied with nondestructive testing technology. The hydrodynamic lubricant feeding conditions in the tandem cold mill have been characterized. The monitoring results show that the hydrodynamic lubricant feeding conditions have been proved to be good indicators for the safety production. This real-time hydrodynamic lubricant feeding conditions monitoring system can be used as a long-term monitoring platform and provide an early warning for the tandem cold mill's abnormal performance.

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The role of lubricant feeding conditions on the performance improvement and friction reduction of journal bearings

Cited by 37 publications

References 36 publications

Analysis of the effect of grooves in single and twin axial groove journal bearings under varying load direction

Analysis of the effect of grooves in single and twin axial groove journal bearings under varying load direction

Thermohydrodynamic modelling of journal bearings under varying load angle and negative groove flow rate

A Method of Feeding Conditions Monitoring of Journal Bearing in Tandem Cold Mill

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