An Adiabatic Solution of Misaligned Journal Bearings

Mokhtar, Mohamed; Safar, Z.S.; Abdelrahman, Mohamed

doi:10.1115/1.3261041

Cited by 37 publications

(18 citation statements)

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“…For a misaligned bearing, the different crosssection along the axis of bearing has different location of journal centre. Therefore, e and c in equation (2) are the function of y coordinate and can be given by…”

Section: Film Thicknessmentioning

confidence: 99%

Research on shaft strength considering offsetting distribution of film pressure of journal bearing in shaft-bearing system

Sun

Chen

Wang

2007

Proceedings of the Institution of Mechanical Engineers, Part C:

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There is a direct interaction between shaft and bearing in shaft-bearing system. The effect of lubrication status of bearing was not considered in the present calculation of shaft strength. In this paper, shaft-bearing system was taken as the study object. Hydrodynamic lubrication characteristics of a journal bearing considering misalignment caused by shaft deformation in shaft-bearing system were analysed. There are obvious offsetting distribution of film pressure and increase of the highest film pressure when journal misalignment takes place. Based on the lubrication analysis of bearing, the stress distribution of shaft was calculated when the film pressure calculated was used as boundary condition of load. The results show that there are obvious changes of stress distribution and great increase of stress near the area on shaft where it is acted upon the highest film pressure when considering the offsetting distribution of film pressure. The shaft strength is affected remarkably. Therefore, in order to accord with the tendency today for high precision in the design calculation, thus more reasonable design can be acquired, the coupling between the analysis of bearing tribology and the analysis of strength and stiffness of shaft must be studied in the design of shaft-bearing system.

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Section: Film Thicknessmentioning

confidence: 99%

Research on shaft strength considering offsetting distribution of film pressure of journal bearing in shaft-bearing system

Sun

Chen

Wang

2007

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Mokhtar et al [83] in 1985 obtained an adiabatic solution for a misaligned journal bearing. They showed that the misalignment effects on the bearing performances are more significant when thermal effects are considered, as expected.…”

Section: Thermal Effectsmentioning

confidence: 99%

On the Characteristics of Misaligned Journal Bearings

Jang

Khonsari

2015

Lubricants

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Journal bearing misalignment arise generally from the shaft deformation under load, deflection of the shaft, manufacturing and assembly errors, improper installation, and asymmetric loading. During operations, misalignment has a considerable effect on the static and dynamic performances. It could cause wear, vibration and even system failure. In this article, a literature review of misalignment of the journal bearings is presented. The basic theory for the misalignment and some results for the circular journal bearing are also presented to show the general trends of the misalignment.

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“…Nicholas (1972) estableció que la intensidad del par producido por el desalineamiento induce poca influencia sobre la excentricidad y la rapidez del flujo axial, pero que la presión máxima se incrementa significativamente. Mokhtar et al, (1985) hacen una evaluación de las características térmicas en chumaceras desalineadas usando un enfoque adiabático. Buckholz y Lin (1986) analizaron el efecto del desalineamiento y la cavitación en chumaceras parciales lubricadas con fluidos No-Newtonianos.…”

Section: Introductionunclassified